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Littérature scientifique sur le sujet « Apatite fission tracks »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Apatite fission tracks"

Ravenhurst, Casey E., Mary K. Roden-Tice et Donald S. Miller. « Thermal annealing of fission tracks in fluorapatite, chlorapatite, manganoanapatite, and Durango apatite : experimental results ». Canadian Journal of Earth Sciences 40, n^o 7 (1 juillet 2003) : 995–1007. http://dx.doi.org/10.1139/e03-032.

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It is well known that the optically measured lengths of fission tracks in apatite crystals are a function of etching conditions, crystallographic orientation of the track, composition of the crystal, and the state of thermal annealing. In this study we standardize etching conditions and optimize track length measurability by etching until etch pits formed at the surface of each apatite crystal reached widths of about 0.74 μm. Etching times using 5M HNO3 at 21°C were 31 s for Otter Lake, Quebec, fluorapatite; 47 s for Durango, Mexico, apatite; 33 s for Portland, Connecticut, manganoanapatite; and 11 s for Bamle, Norway, chlorapatite. An etching experiment using two etchant strengths (5M and 1.6M HNO3) revealed that, despite significant differences in etch pit shape, fission-track length anisotropy with respect to crystallographic orientation of the tracks is not a chemical etching effect. A series of 227 constant-temperature annealing experiments were carried out on nuclear reactor induced tracks in oriented slices of the apatites. After etching, crystallographic orientations of tracks were measured along with their lengths. The 200300 track lengths measured for each slice were ellipse-fitted to give the major (c crystallographic direction) and minor (a crystallographic direction) semi-axes used to calculate equivalent isotropic lengths. The equivalent isotropic length is more useful than mean length for thermal history analysis because the variation caused by anisotropy has been removed. Using normalized etching procedures and equivalent isotropic length data, we found that the fluorapatite anneals most readily, followed by Durango apatite, manganoanapatite, and lastly chlorapatite.

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Vercoutere, C., et P. Van Den Haute. « Post-Palaeozoic cooling and uplift of the Brabant Massif as revealed by apatite fission track analysis ». Geological Magazine 130, n^o 5 (septembre 1993) : 639–46. http://dx.doi.org/10.1017/s001675680002094x.

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AbstractA fission track study has been carried out on apatite from the igneous rock belt running along the southern border of the Brabant Massif. The study includes age determinations and a length analysis of both surface tracks and confined tracks. Apatite fission track ages vary between 146 Ma and 209 Ma. Confined track length distributions and the projected length age spectra indicate that the rocks cooled relatively rapidly from above 100 °C to ambient temperatures. The fission track ages therefore date a cooling phase of the Brabant Massif which is interpreted as reflecting an important uplift during the major part of the Jurassic, related to the Cimmerian tectonism which affected the North Sea basin and adjacent areas. Two apatite samples from the southerly Dinant Basin yield fission track ages around 200 Ma, similar to the oldest ages observed in the Brabant Massif, and with comparable track length characteristics. This indicates that the uplift was not limited to the Brabant region but also affected the Hercynian basement to the south.

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Nachtergaele, Simon, et Johan De Grave. « AI-Track-tive : open-source software for automated recognition and counting of surface semi-tracks using computer vision (artificial intelligence) ». Geochronology 3, n^o 1 (30 juin 2021) : 383–94. http://dx.doi.org/10.5194/gchron-3-383-2021.

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Abstract. A new method for automatic counting of etched fission tracks in minerals is described and presented in this article. Artificial intelligence techniques such as deep neural networks and computer vision were trained to detect fission surface semi-tracks on images. The deep neural networks can be used in an open-source computer program for semi-automated fission track dating called “AI-Track-tive”. Our custom-trained deep neural networks use the YOLOv3 object detection algorithm, which is currently one of the most powerful and fastest object recognition algorithms. The developed program successfully finds most of the fission tracks in the microscope images; however, the user still needs to supervise the automatic counting. The presented deep neural networks have high precision for apatite (97 %) and mica (98 %). Recall values are lower for apatite (86 %) than for mica (91 %). The application can be used online at https://ai-track-tive.ugent.be (last access: 29 June 2021), or it can be downloaded as an offline application for Windows.

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MALLMANN, GUILHERME, JOSÉ ANTÔNIO CUPERTINO et FARID CHEMALE JR. « Caraterização por Microssonda Eletrônica dos Teores de Cloro de Apatitas e sua Importância nos Estudos de Traços de Fissão ». Pesquisas em Geociências 29, n^o 2 (31 décembre 2002) : 31. http://dx.doi.org/10.22456/1807-9806.19603.

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Apatite Fission Track Analysis (AFTA) provides important information for geochronology and is used in different tectonic settings. For example, in the study of sedimentary basins it helps estimate subsidence rates and dates periods of uplift of source areas and tectonic pulses. In geomorphology AFTA also helps to quantify rates of erosion and long-term continental denudation. The chlorine contents in apatites influences the ages obtained from fission track dating. Commonly, apatites with more than 0,4 wt% chlorine yield older ages than fluorapatites (Laslett, et al., 1987), because the stability of the tracks changes as chlorine content increases and consequently chlorine rich-apatites are more resistant to the temperature changes than fluorapatites (Green, 1992). We investigated this problem by first determining the chlorine contents of apatites with the microprobe before apatite fission track dating. We studied four samples of the sandstones from the Reconcavo and Camamu Basins using a total of 198 spots in different apatites. We calibrated CAMECA SX50 electron microprobe using 30 spots from the crystal fragment Durando apatite standard, which has a mean chlorine value of 0,42 wt%. The comparison of the chlorine contents of the apatites of these basins with the ages obtained by AFTA indicates some changes in the individual grains in two samples. These changes are related with the current chlorine content in the apatites, once the individual ages are sometimes distributed as straight line, whose inclination is function of the chlorine content. In the other hand, two samples with modest chlorine content there was not this linear correlation.

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Wu, Hang, Shixiang Wu, Nansheng Qiu, Jian Chang, Rima Bao, Xin Zhang, Nian Liu et Shuai Liu. « Quantitative Identification of the Annealing Degree of Apatite Fission Tracks Using Terahertz Time Domain Spectroscopy (THz-TDS) ». Applied Spectroscopy 72, n^o 6 (6 mars 2018) : 870–78. http://dx.doi.org/10.1177/0003702818761668.

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Apatite fission-track (AFT) analysis, a widely used low-temperature thermochronology method, can provide details of the hydrocarbon generation history of source rocks for use in hydrocarbon exploration. The AFT method is based on the annealing behavior of fission tracks generated by 238U fission in apatite particles during geological history. Due to the cumbersome experimental steps and high expense, it is imperative to find an efficient and inexpensive technique to determinate the annealing degree of AFT. In this study, on the basis of the ellipsoid configuration of tracks, the track volume fraction model (TVFM) is established and the fission-track volume index is proposed. Furthermore, terahertz time domain spectroscopy (THz-TDS) is used for the first time to identify the variation of the AFT annealing degree of Durango apatite particles heated at 20, 275, 300, 325, 450, and 500 ℃ for 10 h. The THz absorbance of the sample increases with the degree of annealing. In addition, the THz absorption index is exponentially related to annealing temperature and can be used to characterize the fission-track volume index. Terahertz time domain spectroscopy can be an ancillary technique for AFT thermochronological research. More work is urgently needed to extrapolate experimental data to geological conditions.

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Ketcham, Richard A., et Murat T. Tamer. « Confined fission-track revelation in apatite : how it works and why it matters ». Geochronology 3, n^o 2 (23 août 2021) : 433–64. http://dx.doi.org/10.5194/gchron-3-433-2021.

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Abstract. We present a new model for the etching and revelation of confined fission tracks in apatite based on variable along-track etching velocity, vT(x). Insights from step-etching experiments and theoretical energy loss rates of fission fragments suggest two end-member etching structures: constant-core, with a central zone of constant etching rate that then falls off toward track tips; and linear, in which etching rates fall linearly from the midpoint to the tips. From these, we construct a characterization of confined track revelation that encompasses all relevant processes, including penetration and widening of semi-tracks etching in from the polished grain surface, intersection with and expansion of confined tracks, and analyst selection of which tracks to measure and which to bypass. Both etching structures are able to fit step-etching data from five sets of paired experiments of fossil tracks and unannealed and annealed induced tracks in Durango apatite, supporting the correctness of our approach and providing a series of insights into the theory and practice of fission-track thermochronology. Etching rates for annealed induced tracks are much faster than those for unannealed induced and spontaneous tracks, impacting the relative efficiency of both confined track length and density measurements and suggesting that high-temperature laboratory annealing may induce a transformation in track cores that does not occur at geological conditions of partial annealing. The model quantifies how variation in analyst selection criteria, summarized as the ratio of along-track to bulk etching velocity at the etched track tip (vT/vB), likely plays a first-order role in the reproducibility of confined length measurements. It also accounts for and provides an estimate of the large proportion of tracks that are intersected but not measured, and it shows how length biasing is likely to be an insufficient basis for predicting the relative probability of detection of different track populations. The vT(x) model provides an approach to optimizing etching conditions, linking track length measurements across etching protocols, and discerning new information on the underlying structure of fission tracks.

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Jensen, Peter Klint, et Kirsten Hansen. « Deconvolution of fission-track length distributions and its application to dating and separating pre- and post-depositional components ». Geochronology 3, n^o 2 (21 décembre 2021) : 561–75. http://dx.doi.org/10.5194/gchron-3-561-2021.

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Abstract. To enable the separation of pre- and post-depositional components of the length distribution of (partially annealed) horizontal confined fission tracks, the length distribution is corrected by deconvolution. Probabilistic least-squares inversion corrects natural track length histograms for observational biases, considering the variance in data, modelization, and prior information. The corrected histogram is validated by its variance–covariance matrix. It is considered that horizontal track data can exist with or without measurements of angles to the c axis. In the latter case, 3D histograms are introduced as an alternative to histograms of c-axis-projected track lengths. Thermal history modelling of samples is not necessary for the calculation of track age distributions of corrected tracks. In an example, the age equations are applied to apatites with pre-depositional (inherited) tracks in order to extract the post-depositional track length histogram. Fission tracks generated before deposition in detrital apatite crystals are mixed with post-depositional tracks. This complicates the calculation of the post-sedimentary thermal history, as the grains have experienced different thermal histories prior to deposition. Thereafter, the grains share a common thermal history. Thus, the extracted post-depositional histogram without inherited tracks may be used for thermal history calculation.

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Green, P. F., I. R. Duddy, A. J. W. Gleadow, P. R. Tingate et G. M. Laslett. « Thermal annealing of fission tracks in apatite ». Chemical Geology : Isotope Geoscience section 59 (janvier 1986) : 237–53. http://dx.doi.org/10.1016/0168-9622(86)90074-6.

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Tamer, Murat T., Ling Chung, Richard A. Ketcham et Andrew J. W. Gleadow. « Analyst and etching protocol effects on the reproducibility of apatite confined fission-track length measurement, and ambient-temperature annealing at decadal timescales ». American Mineralogist 104, n^o 10 (1 octobre 2019) : 1421–35. http://dx.doi.org/10.2138/am-2019-7046.

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Abstract Previous inter-laboratory experiments on confined fission-track length measurements in apatite have consistently reported variation substantially in excess of statistical expectation. There are two primary causes for this variation: (1) differences in laboratory procedures and instrumentation, and (2) personal differences in perception and assessment between analysts. In this study, we narrow these elements down to two categories, etching procedure and analyst bias. We assembled a set of eight samples with induced tracks from four apatite varieties, initially irradiated between 2 and 43 years prior to etching. Two mounts were made containing aliquots of each sample to ensure identical etching conditions for all apatites on a mount. We employed two widely used etching protocols, 5.0 M HNO3 at 20 °C for 20 s and 5.5 M HNO3 at 21 °C for 20 s. Sets of track images were then captured by an automated system and exchanged between two analysts, so that measurements could be carried out on the same tracks and etch figures, in the same image data, allowing us to isolate and examine the effects of analyst bias. An additional 5 s of etching was then used to evaluate etching behavior at track tips. In total, 8391 confined fission-track length measurements were performed; along with 1480 etch figure length measurements. When the analysts evaluated each other's track selections within the same images for suitability for measurement, the average rejection rate was ~14%. For tracks judged as suitable by both analysts, measurements of 2D and 3D length, dip, and c-axis angle were in excellent agreement, with slightly less dispersion when using the 5.5 M etch. Lengths were shorter in the 5.0 M etched mount than the 5.5 M etched one, which we interpret to be caused by more prevalent under-etching in the former, at least for some apatite compositions. After an additional 5 s of etching, 5.0 M tracks saw greater lengthening and more reduction in dispersion than 5.5 M tracks, additional evidence that they were more likely to be under-etched after the initial etching step. Systematic differences between analysts were minimal, with the main exception being likelihood of observing tracks near perpendicular to the crystallographic c axis, which may reflect different use of transmitted vs. reflected light when scanning for tracks. Etch figure measurements were more consistent between analysts for the 5.5 M etch, though one apatite variety showed high dispersion for both. Within a given etching protocol, each sample reflected a decrease of mean track length with time since irradiation, giving evidence of 0.2–0.3 μm of annealing over year to decade timescales.

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Green, Paul F. « On the thermo-tectonic evolution of Northern England : evidence from fission track analysis ». Geological Magazine 123, n^o 5 (septembre 1986) : 493–506. http://dx.doi.org/10.1017/s0016756800035081.

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AbstractThe limited amount of fission track data previously available in Northern Britain has shown unexplained Cretaceous ages in the Southern Uplands and Lake District. Apatite fission track analysis has been applied to 23 samples from Caledonian intrusive bodies, to further investigate these ages. Fission track data of sphene has been carried out on seven samples and zircon in one sample.Apatite fission track ages vary from a maximum of 278 ± 12 Ma in the Cheviot Granite, down to ages of ∼ 60 Ma in the Carrock Fell region, with intermediate ages of ∼ 140 Ma in the Eskdale Granite and ∼ 80 Ma in the Shap Granite. This variation in fission track age is accompanied by changes in the distribution of confined fission track lengths. Samples with the youngest ages (∼ 60 Ma) have long, narrow distributions (mean length > 14 μm; standard deviation ∼ 1 μm) typical of samples which have had all pre-existing tracks erased by elevated temperatures, and subsequently cooled rapidly so that all tracks now observed have formed at low temperatures. As ages increased from 60 Ma, a component of shorter tracks becomes more dominant, representing tracks which have been shortened at elevated temperatures. Thus ages greater than 60 Ma are ‘apparent ages’, representing a partial overprint of a pre-existing track record, while the ∼ 60 Ma ages record a total resetting at this time.The heating responsible for the observed fission track annealing may be due to residence at temperatures in the range 70–125 °C over many tens of Ma, or to a short lived heat pulse perhaps associated with the Tertiary igneous province of the northwest. In either case, uplift and erosion on a scale of kilometres at ∼ 60 Ma ago is necessary to produce the observed pattern of fission track parameters. This uplift may be related in some way to basin inversions, also on a kilometre scale, known to have taken place at around the Late Cretaceous/Early Tertiary to the southeast (Cleveland, Sole Pit and Broad Fourteens Basins). No previous evidence of such uplift in Northern England has been reported, and the study reported here highlights the unique potential of apatite fission track analysis for the detection of mild thermo-tectonic events, often in areas where no other evidence exists.

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Thèses sur le sujet "Apatite fission tracks"

RESENTINI, ALBERTO. « Quantitative provenance analysis of modern sands : bulk petrography, heavy minerals apatite fission tracks ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/19000.

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Sediment petrography and heavy mineral analysis represent two key techniques to decipher the pieces of information stored in the sedimentary record, shedding light on source rocks compositon, weathering conditions and paleodrainages. Traditionally, even though orogenic detritus has always received large attention, orogenic provenance has been recognized as “composite”, thus preventing clear classification. Notwithstanding the composite nature of collision orogens, the detrital fingerprints of neometamorphic axial belts, largely experiencing strong exhumation and erosion, can be regarded as the diagnostic signature of orogenic detritus. We thus decided to focus our attention on the analysis of modern river sands from the Alpine belt, getting full quantitative information both on bulk compositions and heavy mineral assemblages. Within the Austroalpine Cretaceous and Penninic Eocene axial belts of the Alps, we ideally distinguish three structural levels, each characterized by diagnostic detrital fingerprints. The shallow level chiefly consists of offscraped remnant-ocean turbidites and unmetamorphosed continental-margin sediments, and mostly produces lithic to quartzolithic sedimentaclastic sands yielding very-poor heavy-mineral suites including ultrastable minerals. The intermediate level includes low-grade metasediments and polymetamorphic basements, and sheds quartzolithic to feldspatholithoquartzose metamorphiclastic sands yielding moderately-rich epidote-amphibole suites with chloritoid or garnet. The deep level contains eclogitic remnants of continent-ocean transitions, and supplies feldspatholithoquartzose/feldspathoquartzose high-rank metamorphiclastic to lithic ultramaficlastic sands yielding rich to extremely-rich suites dominated by garnet, hornblende, or epidote depending on protoliths (continental vs. oceanic) and pressure/temperature paths during exhumation. Although widely overprinted under greenschist-facies or amphibolite-facies conditions, occurrence of ultradense eclogite in source areas is readily revealed by the Heavy Mineral Concentration (HMC) index, which mirrors the average density of source rocks in the absence of hydraulic-sorting effects. Rather than the pressure peak reached at depth, the Metamorphic Index (MI) and Hornblende Colour Index (HCI) reflect peak temperatures reached at later stages, when subduction is throttled by arrival of thicker continental crust and geothermal gradients increase, as documented in detritus derived from the Tauern window and Lepontine dome. Experience gained from modern sediments, and appropriate statistical techniques provides fundamental help to decrypt the information stored in the sedimentary record, and thus to identify and reconstruct subduction events of the past. Besides the fundamental contribution that modern sediment analysis can bring in understanding ancient sandstone successions, it can also give insights on short-term erosion distribution over wide areas and readily detect potential area of focused erosion. We tested a new quantitative approach based on the integration of compositional data and detrital apatite fission-tracks in two valleys of the western Alps (Arc and Dora Baltea basins). Samples for bulk-petrography and fission-track analysis were collected at different closure sections along the trunk, in order to investigate how the detrital signal evolves when detritus from different sub-basins is progressively added to the system. Fission-track analysis is a powerful integration tool to quantify sediments mixing if source areas experienced contrasting exhumation paths. Fission-track grain-age distributions provide not only information on long-term exhumation patterns, based on the age of the peaks, but also provide first-order constraints on short-term erosion rates by comparison between the size of the peaks and the size of potential source areas. In the Dora Baltea catchment, the apatite load derives from two major fault-bounded blocks, the Western one yielding 43% of the total amount of apatite, and the Eastern one yielding the remaining 57%. In the Arc catchment, contribution is 29% from the Eastern Block, 14% from the Houiller-Subbriançonnais units and 57% from the Belledonne-Dauphinois units. We assessed apatite fertility in source-rocks by measuring apatite content in processed sediments, after checking for anomalous hydraulic concentrations by geochemical analyses. The lack of compositional anomalies for elements between Y and Cr, largely hosted in ultradense minerals, grants that source-rocks distribution in the basin is faithfully reflected by detrital assemblages. Results demonstrate that erosional processes were focused in different areas of the Western Alps at long-term and short-term timescales, and are now concentrated in the External Massifs. No clear relationship between erosion and climate or relief is observed in this sector of the belt, where endogenic forces may represent the main controlling factor on both long-term and short-term erosion rates.

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Meresse, Florian. « Dynamique d’un prisme orogénique intracontinental : évolution thermochronologique (traces de fission sur apatite) et tectonique de la Zone Axiale et des piémonts des Pyrénées centro-occidentales ». Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20038.

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Ce travail de thèse concerne une transversale complète des Pyrénées centro-occidentales, où on a combiné la thermochronologie basse température (traces de fission sur apatites, TFA) avec une analyse structurale détaillée pour décrire les mouvements verticaux associés à l'évolution du système chevauchant, et pour déterminer l'influence de ce dernier sur le cycle sédimentation/enfouissement/exhumation des dépôts synorogéniques du bassin d'avant-chaine sud (bassins de Jaca et Ainsa). L'analyse TFA complète les données déjà publiées dans la Zone Axiale et la Zone Nord-Pyrénéenne, et constitue la première étude de ce genre dans un bassin d'avant-chaîne pyrénéen. Les données TFA sur la transversale du bassin sud-pyrénéen montrent une diminution vers le sud du degré d'effacement des traces de fission, traduisant la diminution vers le sud de la quantité d'enfouissement, supérieure à 5 km au nord et inférieure à 3 km au sud dans l'hypothèse un géotherme de 25°.km-1. Le contexte géologique montre que l'enfouissement est principalement lié à l'accumulation des dépôts synorogéniques. Les données TFA de la partie nord du bassin montrent un refroidissement d'âge Oligocène supérieur-Miocène inferieur (moyen). Par ailleurs, une nouvelle interprétation de profils de sismiques réflexion dans le bassin de Jaca montre que le chevauchement d'Oturia s'enracine dans le chevauchement de socle de Bielsa, responsable de l'exhumation tectonique hors-séquence du bord sud de la Zone Axiale au Miocène inférieur (-moyen) (Jolivet et al., 2007). Ces résultats attestent donc de l'exhumation tectonique hors-séquence au Miocène inférieur (Burdigalien- ?Langhien) de la partie nord du bassin d'avant-chaine sud-pyrénéen. Des données TFA obtenues dans la Zone Axiale et la Zone Nord-Pyrénéenne confirment la migration générale vers le sud du système chevauchant, et mettent également en évidence la réactivation tectonique hors-séquence du bord nord de la Zone Axiale à l'Oligocène terminal-Miocène inférieur. L'ensemble de ces résultats atteste donc de la réactivation en « pop-up » de la parties interne des Pyrénées centre-ouest à l'Oligocène supérieur-Miocène inférieur (Burdigalien- ?Langhien), postérieurement au scellement du front sud-pyrénéen (Aquitanien- ?Burdigalien) classiquement considéré comme marquant la fin de la compression pyrénéenne. Ces données nous ont permis de proposer un nouveau modèle d'évolution crustale des Pyrénées centro-occidentales en 3 grandes étapes : (i) du Crétacé supérieur à l'Eocène moyen, le prisme est caractérisé par une absence de relief, en lien avec l'inversion de structures extensives crétacées conduisant à l'accrétion de petites écailles crustales ; (ii) la période Eocène supérieur-Oligocène correspond à la collision continentale proprement dite, et est marquée par la création d'importants reliefs associés à l'accrétion d'épaisses unités crustales ; (iii) au Miocène inférieur, la partie interne du prisme pyrénéen est réactivée
In this work on a complete transect of the west-central Pyrenees, we combine low temperature thermochronology (apatite fission tracks, AFT) with a detailed structural analysis to describe vertical movements related to the thrusting system evolution, and to determine the influence of the latter on the sedimentation/burial/exhumation cycle of the synorogenic deposits of the southern foreland basin (Jaca and Ainsa basins). AFT analysis from a transect of the south-Pyrenean basin show the southward decrease of the fission track reset level from the southern edge of the Axial Zone to the South-Pyrenean frontal thrust, implying the southwards decrease of the burial amount from more than 5km in the north to less than 3km in the south assuming an average geothermal gradient of 25°C.km-1. The structural setting of the Jaca basin attests that the burial of the synorogenic sediments was mainly due to the sedimentary accumulation. AFT data from the northern part of the basin display a late Oligocene-early (middle) Miocene cooling event. New interpretation of industrial seismic reflection profiles across the Jaca basin suggests that the Oturia thrust is rooted in the Bielsa basement thrust, responsible for the early (-middle) Miocene out-of-sequence tectonic reactivation of the southern flank of the Axial Zone (Jolivet et al., 2007). These results reveal a lower Miocene (Burdigalian -?Langhian) out-of-sequence episode of tectonic activity of the interior of the south-Pyrenean foreland basin. AFT data from the Axial Zone and the North-Pyrenean Zone confirm the general southward migration of the thrusting system, and also bring evidence of the late Oligocene-lower Miocene out-of-sequence tectonic reactivation of the northern flank of the Axial Zone. All these results attest of a late Oligocene-lower Miocene (Burdigalian-?Langhian) 'pop-up' reactivation of the inner part of the west-central Pyrenees, younger than the sealing of the south-Pyrenean front (Aquitanian-?Burdigalian) which is classically considered to mark the end of the Pyrenean compression. These results lead us to propose a new crustal scale evolution model of the west-central Pyrenees in 3 stages: (i) From the Late Cretaceous to the middle Eocene, the orogenic prism is characterised by the absence of relief, related to the inversion of Cretaceous extensional structures leading to the accretion of thin crustal units; (ii) The late Eocene-Oligocene stage corresponds to the continental collision, marke d by the creation of important relief associated with the accretion of thick crustal units; (iii) During the early Miocene, the inner part of the Pyrenean wedge is tectonically reactivated

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D'ADDA, PAOLO. « Eo-alpine evolution of the central southern alps. Insights from structural analysis and new geochronological constraints ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/19018.

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The timing of the Alpine deformation in the Central Southern Alps (CSA or Orobic Alps) has always been a debated topic, since the scarcity of reliable absolute age constraints has prevented an accurate chronological reconstruction of the evolution of this sector of the European Alps. In this work, detailed structural analyses performed in different areas of the CSA allowed us to distinguish different compressive features within both the crystalline basement and the sedimentary cover. The integration of these field data with new isotopic data provides time constraints for the reconstruction of the evolution of the CSA during the Alpine orogeny. In the northern sector of the belt a Variscan polymetamorphic basement is stacked southward on the Permian to Mesozoic cover along two main regional faults (Orobic and Porcile thrusts). Fault zones, slightly postdating a first folding event of Alpine age (D3), experienced a complex evolution through the ductile and brittle deformation regime, showing greenschists facies mylonites overprinted by a penetrative cataclastic deformation (D4). Generation of fault-related pseudotachylytes marks the onset of brittle conditions, lasting up to the youngest episodes of fault activity. Thrusting along this structures also produced thrusting within the Permian-Triassic cover with the formation of different south-verging thrust stacks. This first thrusting event was followed by the activation of new deeper thrust surfaces leading to the emplacement of three regional anticlines (Orobic Anticlines) which tilted to the south the previously stacked units. During this long compressive stage (Orobic-Porcile thrusts and Orobic Anticlines) the sedimentary cover of the CSA was also involved in thrusting and different stacks of Mesozoic units were emplaced to the south. 40Ar/39Ar dating of the pseudotachylyte matrix of 9 samples from both the Orobic and Porcile thrusts give two separated age clusters: Late Cretaceous (80-68 Ma) and Early to Middle Eocene (55-43 Ma). These new data provide evidence that the pre-Adamello evolution of the CSA was characterized by the superposition of different tectonic events accompanying the exhumation of the deepest part of the belt through the brittle-ductile transition. The oldest pseudotachylyte ages demonstrate that south-verging regional thrusting in the CSA was already active during the Late Cretaceous, concurrently with both the HP metamorphism that affected the Austroalpine units of the eastern Alps, and the development of a syn-orogenic foredeep basin where the Upper Cretaceous Lombardian Flysch was deposited. In the Early to Middle Eocene a minor reactivation of the Orobic and Porcile thrusts occurred, as testified by the youngest pseudotachylyte ages obtained by 40Ar/39Ar dating. This event was probably related with the closure of the Ligurian-Piedmont and the ongoing of the Europe-Adria collision. South of the Orobic Anticlines system the Triassic sedimentary succession is stacked into several units bounded by south-verging low-angle thrust faults, which are related to different steps of crustal shortening. Different thrust stacks occur within the Triassic cover between the Como Lake to the west and the Adamello batholith to the east. They usually have an antiformal arrangement and are separated by each other by different N-S trending transverse zones, such as the poorly known Grem-Vedra Transverse Zone (GVTZ), formed during complex deformational phenomena in a transpressional regime coeval with thrust emplacement. The GVTZ formed during the southward imbrication of the older thrust sheets of the Menna-Arera group, strongly interacting with syn-thrust ductile structures, and was reactivated during the growth of the Orobic Anticlines belt. The GVTZ and other transverse zones of the CSA probably reflect the occurrence of pre-existing fault systems that characterize the Norian to Jurassic rifting history of the Lombardian basin, and were reactivated as strike-slip features during Alpine tectonics. In the Gandino and Presolana areas thrust surfaces are cut by high-angle extensional and strike-slip faults, which controlled the emplacement of hypabissal magmatic intrusions that post-date thrusts motions. Intrusion ages based on SHRIMP U-Th-Pb zircon dating span between 42±1 and 39±1 Ma, suggesting close time relationships with the earliest Adamello intrusion stages and, more in general, with the widespread calc-alkaline magmatism described in the Southern Alps. Fission track ages of magmatic apatites are indistinguishable from U-Pb crystallization ages of zircons, suggesting that the intrusion occurred in country rocks already exhumed above the partial annealing zone of apatite (depth < 2-4 km). These data indicate that the northern and central sectors of the CSA were already structured and largely exhumed in the Middle Eocene and no major internal deformations has occurred in these areas after the Bartonian. Neogene deformations were instead concentrated further south, along the frontal part of the belt (Milano Belt). These new data provide a direct evidence that thrusting and nappe stacking were active during Late Cretaceous times not only in the Eastern Alps, but also in the CSA, significantly extending southward the sector of the Alpine belt affected by the Cretaceous orogenic event. In this view, the Late Cretaceous Southern Alps can be interpreted as the south-verging retrobelt of a pre-collisional orogenic wedge, which formed during the subduction of the Alpine Tethys beneath the attenuated northern Adria margin.

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Moreira, Pedro Augusto Franco Pinheiro. « Estudo sobre annealing de traços de fissão em apatitas de diferentes composições químicas e em faces sem orientação cristalográfica preferencial ». [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278582.

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Orientadores: Pedro Jose Iunes, Julio Cesar Hadler Neto
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
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Resumo: Nesta tese estudou-se de forma geral sobre o annealing de traços de fissão em apatita, visando principalmente aplicações práticas da Termocronologia por Traços de Fissão. Para isso obteve se um conjunto de dados que possibilitasse que medidas de campo pudessem ser feitas em faces sem orientação cristalográfica preferencial, porque isso permite que seja considerado um número maior de traços fósseis nas "medidas de campo". Neste conjunto o amplo espectro de concentração de cloro encontrado nas apatitas naturais foi refletido, utilizando-se os extremos das concentrações de cloro (0,01 e 5 %), procurando-se incluir apatitas brasileiras. Outra característica marcante do presente conjunto foi à determinação das densidades de traços concomitantemente às medidas de comprimento. Para a escolha dos tratamentos térmicos para a confecção do conjunto, foi desenvolvida uma metodologia baseada em um algoritmo estatístico que foi aplicado a equações cinéticas com dados de annealing já estabelecidos antes dos dados apresentados neste trabalho. Cada amostra deste conjunto de dados de annealing foi submetida a dois ataques químicos diferentes: (1) durante 20 s em 5 M de HNO3 a 20° C e; (2) durante 45 s em 1,5 M de HNO3 a 20° C. Assim, comparou-se os efeitos destes dois ataques químicos em amostras que sofreram diferentes tratamentos térmicos. Os resultados indicaram que os comprimentos de traços encurtados pelo annealing não são influenciados por diferenças na concentração dos ataques padrões. Os tempos ótimos para a realização dos ataques foram estabelecidos através de três curvas de ataques químicos. A partir da interpretação dessas curvas desenvolveu-se um modelo cinético de ataque químico que descreve bem os dados apresentados nesta tese e baseia nos mesmos princípios do modelo cinético de annealing, que foi desenvolvido pelo Grupo de Cronologia da UNICAMP e contou com a colaboração deste autor. Este modelo de annealing foi ajustado aos dados de Carlson et al. (1999) permitindo compará-los com os dados aqui apresentado. No presente trabalho os resultados foram obtidos em faces sem orientação cristalográfica preferencial (onde foram medidos tanto traços-em-traços como traços em fraturas) e os resultados de Carlson et al. (1999) foram obtidos em faces prismáticas (onde foram medidos apenas traços-em-traços). Não houve sistematicidade na posiçao dos pontos obtidos neste trabalho com relação às curvas justadas aos dados de Carlson et al. (1999), porém, apontou uma dispersão relativamente grande deles em relação aos seus respectivos ajustes. Essa dispersão foi atribuída à anisotropia de ataque químico levando-se em conta que em faces cristalográficas sem orientação preferencial existem mais traços que podem ser confundidos com defeitos do que em faces prismáticas. Os resultados de uma forma geral indicam que medidas feitas em faces sem orientação cristalográfica preferencial (com traços-em-traços e traços em fraturas) podem ser consideradas em medidas de campo sem alterar de forma significativa as histórias térmicas, desde que os comprimentos reduzidos sejam maiores que 0,65
Abstract: In this thesis the fission track annealing in apatite was studied in a general way, considering mainly practical applications of Fission Track Termochronology. A data set that allows the use of randomly oriented grains was done, because a greater number of fossil tracks could be considered in the "field measures". Apatites with a broad chlorine spectrum (0.01 and 5%) in their compositions were used and it was included Brazilian apatites. Density measures were determinated together with length ones in this data set. The heat treatments used in this data set was chosen through a methodology was developed based on a statistical algorithm. This algorithm has been applied to kinetic equations fitted for another annealing data set established before the presented one in this work. The data set two was done with two different chemical etching for each sample: (1) for 20 s at 5 M of HNO3 at 20° C and, (2) for 45 s at 1.5 M of HNO3 at 20° C. Thus, it was possible to compare effects of these two etchings in samples which suffered different heat treatments. The results indicated that annealing length data sets are not influenced by differences in the standard chemical concentration of these etchings. The optimal etching times were established through three etching paths. From the interpretation of these paths, it was developed a chemical etching kinetic model that describes well the data presented here. This model is based on the same principles as the annealing kinetic model which was elaborated by the Group of Chronology that counted with the collaboration of the author of this thesis. This annealing model allowed the comparison between the data presented here and the data set by Carlson et al. (1999) through the fit of this model in the set of Carlson. The results of this thesis were obtained in randomly oriented grains where were measured track-in-track and track-in-cleavage and results of Carlson et al. (1999) were obtained in prismatic faces in which were measured only track-in-track. The comparison between the results showed that there is no tendency in position of the points obtained from this work. However, there is a dispersion of them in relation to their respective fits relatively large. This dispersion has been attributed to etching anisotropy taking into account that tracks in randomly oriented grains can be easier confused with defects than in prismatic faces. The results in general show that measures made in randomly oriented grains (with track- in-track and track-in-cleavage) may be considered field measures without changing the thermal histories in significant way, provided that the reduced lengths are greater than 0.65
Doutorado
Física Nuclear
Doutor em Ciências

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Lelarge, Maria Lidia Meideros Vignol. « Thermochronologie par la méthode des traces de fission d'une marge passive (dôme de Ponta Grossa, se Brésil) et au sein d'une chaîne de collision (zone externe de l'arc alpin, France) ». Université Joseph Fourier (Grenoble), 1993. https://tel.archives-ouvertes.fr/tel-00603209.

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La méthode de datation par les traces de fission sur apatite a été appliquée dans deux contextes différents: une marge passive (dôme de Ponta Grossa dans l'état du Paraná au sud-est du Brésil) et une chaine de collision (massifs de Belledonne et du grand Châtelard, ainsi que la zone dauphinoise interne, dans les Alpes occidentales françaises). L'objectif de ce mémoire était de retracer l'histoire du refroidissement des roches de ces deux régions et dans une certaine mesure d'établir une chronologie des processus géodynamiques qui s'y sont produits. Les apatites du dôme de Ponta Grossa ont enregistré le refroidissement provoqué par la surrection-érosion de la serra do mar, chaïne montagneuse qui longe la côte sud-est brésilienne. La serra do mar correspond probablement a une réponse tardive à l'ouverture de l'Atlantique sud, qui s'est effectuée vers 120 MA aux environs de la latitude 26s. Les âges tracés de fission (tf) apparents des 21 échantillons analyses s'échelonnent entre 100 MA et 80 MA. L'analyse des résultats tf sur apatite, obtenus sur les 33 échantillons alpins, indique que l'histoire du refroidissement de cette région est extrêmement complexe. Les âges apparents tf sont compris entre 7,5 MA et 1,7 MA. Les taux de dénudation sont variables selon le secteur étudié et expriment ainsi un comportement différent vis-à-vis des processus tectoniques. Depuis le miocène supérieur jusqu'a 1 MA, les taux de dénudation apparents sont estimes a 0,4 mm/an pour le massif de Belledonne et à 0,7 mm/an pour le grand Châtelard et la zone du flysch. A partir d'un million d'années jusqu'à l'actuel le taux de dénudation apparent augmente et devient de l'ordre de 2 mm/an, pour l'ensemble de la région

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Rabone, Jeremy Andrew Leslie. « Molecular dynamics of fission track annealing in apatite minerals ». Thesis, Birkbeck (University of London), 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499138.

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Grivet, Manuel. « Contribution a l'analyse du phenomene de recuit thermique des traces de fission de l'uranium dans l'apatite ». Besançon, 1994. http://www.theses.fr/1994BESA2008.

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Les traces de fission spontanees de l'uranium dans l'apatite permettent la datation de ce mineral. Cependant, elles sont sensibles a une elevation de temperature en disparaissant progressivement. La technique couramment utilisee pour caracteriser l'etat de recuit des traces est la mesure de leurs longueurs par microscopie optique, apres revelation par un agent chimique approprie. C'est la repartition de ces longueurs qui est la plus a meme de nous fournir l'essentiel de l'histoire thermique de l'echantillon. C'est pourquoi nous proposons et developpons un modele de calcul permettant de simuler les histogrammes de longueurs projetees des traces de surface. A partir de ce modele, il est possible de transposer la repartition des longueurs en une construction graphique dans laquelle intervient l'echelle des temps: c'est la fonction d'age. Celle-ci permet d'obtenir des renseignements importants sur l'histoire thermique tels que la date de passage a 120#oc ou le temps de residence dans la zone de retention partielle des traces. Plusieurs applications de ce modele sur des materiaux geologiques sont presentees. Par ailleurs, une etude en microscopie electronique a transmission du diametre de double-repliques de traces d'ion kr, en fonction des temps de recuit et de revelation, est decrite. Elle montre une dependance de la vitesse d'attaque chimique radiale des traces vis-a-vis du temps de recuit et de la profondeur atteinte a l'interieur du mineral. Elle met aussi en evidence une evolution de la dispersion des diametres avec le recuit. Dans l'analyse mathematique des cinetiques d'effacement et de production des traces, ce dernier resultat nous conduit a utiliser un terme d'energie d'activation variant en fonction du recuit. Le but de cette approche est de resoudre de maniere unique le probleme de reconstruction d'histoires thermiques a partir de repartitions de longueurs de traces

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Meyer, Arnaud J. « Les traces de fission dans l'apatite : étude expérimentale et application à l'histoire thermique de bassins sédimentaires ». Vandoeuvre-les-Nancy, INPL, 1990. http://www.theses.fr/1990INPL084N.

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Le nombre des traces de fission spontanée dans un minéral est fonction de son âge, de sa concentration en uranium et de son histoire thermique, les longueurs et les densités diminuant avec l'augmentation de la température. Une étude a été réalisée sur les temps nécessaires pour atteindre la révélation complète des densités et des longueurs des traces de fission induites en fonction des conditions d'attaque utilisées. L'influence des conditions d'observation et des critères de mesures choisis sur les distributions des longueurs projetées des traces et sur la reproductibilité et la précision des mesures, a également été examinée. Une expérience a été réalisée, prouvant que deux populations de traces de fission peuvent être reconnues et séparées à partir des longueurs projetées. La méthode de correction des âges-plateaux a été appliquée à l'apatite de Durango (Mexique) pour tester l'utilisation de cette apatite comme standard d'âge. Des expériences de recuit des traces réalisées en laboratoire ont permis de quantifier la relation entre les taux de réduction des longueurs (l/lo) et des densités (p/po) des traces de fission et de définir les conditions de stabilité des traces suivant nos conditions expérimentales. Un programme de modélisation de l'évolution de la longueur des traces sous l'effet d'une histoire thermique donnée a été employé pour illustrer la réponse des paramètres traces de fission en fonction de la profondeur, à trois histoires thermiques différentes (simple enfouissement, variation du gradient géothermique et érosion). De tous les exemples étudiés, la méthode des traces de fission apparait être un outil fiable pour la reconstitution de l'histoire thermique d'une roche, permettant de dater et de préciser les températures d'évènements dia génétiques et, comparée aux données d'autres géochrono- et géothermomètres de les intégrer dans un contexte géodynamique plus large

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Brown, Summer Jasmine. « Integrating apatite (U-Th)/He and fission track dating for a comprehensive thermochronological analysis : refining the uplift history of the Teton Range ». Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/32718.

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Uplift of the Teton Range is primarily controlled by displacement across the range-front Teton normal fault. The Tetons comprise the footwall block while the hanging wall encompasses Jackson Hole valley and a portion of the Snake River. Relative to the rest of the Rocky Mountains, the Tetons experienced the majority of uplift very recently, substantiating the need for a detailed investigation integrating structural analysis and bedrock thermochronometry. New low-temperature cooling ages are documented in three vertical transects across the Teton Range and at low elevations parallel to the Teton fault. Samples adjacent to the Teton fault are consistently young (~9 Ma) and represent a minimum estimate for the onset of Teton fault-related uplift. Modeling of time-temperature histories supports a ~9-11 Ma onset of rapid uplift, indicating that the Teton fault likely originated as a Basin and Range-type structure. A maximum throw of ~8 km occurs proximal to the Grand Teton, while the average throw for the entire ~100 km along-strike fault length is ~3.3 km. Thus, the geometry of the Teton fault is comparable to traditional scaling relationships dictating a correlation between fault length and displacement. Inversion of the typical (U-Th)/He (AHe) and fission track (AFT) relationship in a few of the Teton Range samples is a result of intense zoning, primarily in apatite from Precambrian layered gneisses. Nonetheless, both the AHe and AFT ages consistently indicate slight differential uplift of the Tetons between the Late Oligocene and Middle Miocene. HeFTy models indicate that doming of the Precambrian-Paleozoic unconformity occurred prior to ~50 Ma. However, by ~15 Ma, rapid cooling of the Mount Moran section essentially â flattenedâ the unconformity. Thus, the modern domed shape is a result of displacement across the Teton fault, allowing the unconformity to be used as a proxy for fault deformation. Moreover, reconstruction of the unconformity and volume calculations produced an average depth to incision of ~0.3 km and a long-term erosion rate of 0.18 mm/yr. Compared to the long-term uplift rate of 0.22 mm/yr, this provides a quantitative explanation for the modern Teton topography.
Master of Science

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Ribeiro, Marli Carina Siqueira [UNESP]. « Termocronologia e história denudacional da Serra do Mar e implicações no controle deposicional da Bacia de Santos ». Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/103022.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Neste trabalho são apresentados os resultados obtidos por meio de análises geomorfológicas (Mapa de Níveis de Paleosuperfícies) e termocronológicos (traços de fissão em apatitas e U-Th/He em apatitas) ao longo da Serra do Mar nos setores (1), (2), (3) e (4). As correlações entre as analises geomorfológicas e termocronológicas evidenciaram uma geológica e geomorfológica compreendida entre o Cretáceo Superior e Paleoceno, demonstrando que a evolução das morfologias que compõem a área de estudo estiveram associadas a eventos tectônicos e sucedidos por uma intensa atividade erosiva. De acordo com as datações realizadas utilizando termocronômetros com temperatura de fechamento distintas, estes indicaram que as configurações dos relevos que compõem a Serra do Mar não podem ser associadas apenas aos efeitos das atividades erosivas (recuo de escarpa) e isostáticas, para poderem explicar a homogeneidade entre as idades de traços de fissão e (U-Th)/He em apatitas, sem a presença da atuação tectônica soerguendo e desnivelando parte destes relevos.
In this paper the results obtained geomorphological analysis (Map of levels of Palaeosurfaces) and thermochronogical analysis (apatite fission-track and UTh/ He). The correlation between the geomorphologica and the thermochronological analysis evidenced a geological and geomorphological evolution from the Upper Cretaceous to the Palaeocene, showing that the evolution of the morpholoies composing the study area were associated to tectonics events and preceded by intense erosive activity. According to the datings done using thermocronometers with distinct closing temperatures the configuration of the relieves that compose the Serra do Mar can not be associated only to the effects of the erosive (escarpment retreate) and isostatic activities but also to the tectonic motion uplifting and unlevelling part such morphologies, in order to explain the homogeneity between the ages of the fission-track and U-Th/He of apatites.

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Livres sur le sujet "Apatite fission tracks"

Lisker, Frank. Geodynamik des Westantarktischen Riftsystems basierend auf Apatit-Spaltspuranalysen = : Geodynamics of the West Antarctic Rift System based on apatite fission tracks. Bremerhaven : Alfred-Wegener-Institut für Polar- und Meeresforschung, 1996.

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Naeser, Nancy D. Miocene cooling in the southwestern Powder River Basin, Wyoming : Preliminary evidence from apatite fission-track analysis. Washington : U.S. G.P.O., 1992.

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B, O'Sullivan Paul, et Geological Survey (U.S.), dir. Results of 110 apatite fission tract analyses from the Brooks Range and North Slope of northern Alaska, completed in cooperation with the Trans-Alaska Crustal Transect (TACT). Menlo Park, CA : U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Solovʹev, A. V. Izuchenie tektonicheskikh prot︠s︡essov v oblasti︠a︡kh konvergent︠s︡ii litosfernykh plit : Metody trekovogo i strukturnogo analiza. Moskva : Nauka, 2008.

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European Conference on Thermochronology (2006 : Bremen, Germany), dir. Thermochronological methods : From palaeotemperature constraints to landscape evolution models. London : Geological Society, 2009.

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Green, Duddy, et Laslett Hegarty. Apatite Fission Track Analysis. Kluwer Academic Publishers Group, 1996.

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Chapitres de livres sur le sujet "Apatite fission tracks"

Lisker, F., et M. Olesch. « Cooling and Denudation History of Western Marie Byrd Land, Antarctica, Based on Apatite Fission-Tracks ». Dans Advances in Fission-Track Geochronology, 225–40. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9133-1_14.

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Donelick, Raymond A., Paul B. O’Sullivan et Richard A. Ketcham. « 3. Apatite Fission-Track Analysis ». Dans Low-Temperature Thermochronology :, sous la direction de Peter W. Reiners et Todd A. Ehlers, 49–94. Berlin, Boston : De Gruyter, 2005. http://dx.doi.org/10.1515/9781501509575-005.

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Mitchell, M. M., B. P. Kohn et D. A. Foster. « Post-Orogenic Cooling History of Eastern South Australia from Apatite FT Thermochronology ». Dans Advances in Fission-Track Geochronology, 207–24. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9133-1_13.

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Carpéna, J. « Uranium-235 Fission Track Annealing in Minerals of the Apatite Group : An Experimental Study ». Dans Advances in Fission-Track Geochronology, 81–92. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9133-1_6.

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Arne, D., et M. Zentilli. « Apatite Fission Track Thermochronology Integrated with Vitrinite Reflectance ». Dans ACS Symposium Series, 249–68. Washington, DC : American Chemical Society, 1994. http://dx.doi.org/10.1021/bk-1994-0570.ch016.

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Glasmacher, U., M. Zentilli et A. M. Grist. « Apatite Fission Track Thermochronology of Paleozoic Sandstones and the Hill-Intrusion, Northern Linksrheinisches Schiefergebirge, Germany ». Dans Advances in Fission-Track Geochronology, 151–72. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9133-1_10.

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Schäfer, T., et M. Olesch. « Multiple Thermal Evolution of Oates Land (Northern Victoria Land, Antarctica) : Evidence from Apatite Fission Track Analysis ». Dans Advances in Fission-Track Geochronology, 241–53. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9133-1_15.

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Iwano, H., et T. Danhara. « A Re-Investigation of the Geometry Factors for Fission-Track Dating of Apatite, Sphene and Zircon ». Dans Advances in Fission-Track Geochronology, 47–66. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9133-1_4.

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O’Sullivan, Paul B., et Roderick W. Brown. « Effects of Surface Cooling on Apatite Fission-Track Data : Evidence for Miocene Climatic Change, North Slope, Alaska ». Dans Advances in Fission-Track Geochronology, 255–67. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9133-1_16.

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Thomson, S. N., B. Stöckhert, H. Rauche et M. R. Brix. « Apatite Fission-Track Thermochronology of the Uppermost Tectonic Unit of Crete, Greece : Implications for the Post-Eocene Tectonic Evolution of the Hellenic Subduction System ». Dans Advances in Fission-Track Geochronology, 187–205. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9133-1_12.

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Actes de conférences sur le sujet "Apatite fission tracks"

Lucie, Novakova, Raymond Jonckheere, Bastian Wauschkuhn et Lothar Ratschbacher. « Apatite fission-track analysis : Progress by effective track etch time ». Dans Goldschmidt2021. France : European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6334.

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Løseth, H., et J. -P. Stiberg. « Apatite and Zircon Fission Track Data from Lofoten and Vesterålen ». Dans 60th EAGE Conference and Exhibition. European Association of Geoscientists & Engineers, 1998. http://dx.doi.org/10.3997/2214-4609.201408440.

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Morris, Alice. « GEOSPATIAL ANALYSIS OF APATITE FISSION TRACK AND APATITE (U-TH)/HE IN RELATION TO ELEVATED TOPOGRAPHY ALONG ACTIVE FAULTS ». Dans Joint 118th Annual Cordilleran/72nd Annual Rocky Mountain Section Meeting - 2022. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022cd-374114.

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Pagel, M., J. J. Braun, C. Demars, A. Meyer, J. Pirinon et F. Walgenwitz. « Palaeothermicity of some European sedimentary basins derived from fluid inclusion and apatite fission track analyses ». Dans 55th EAEG Meeting. European Association of Geoscientists & Engineers, 1993. http://dx.doi.org/10.3997/2214-4609.201411743.

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Rochat, P., A. Rosero, R. Gonzalez, I. Florez, M. Lozada et R. Petton. « Thrust Kinematics Of The Tangara/Mundo Nuevo Area : New Insight From Apatite Fission Track Analysis ». Dans 8th Simposio Bolivariano - Exploracion Petrolera en las Cuencas Subandinas. European Association of Geoscientists & Engineers, 2003. http://dx.doi.org/10.3997/2214-4609-pdb.33.paper17.

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Kelley, Shari A., et Charles E. Chapin. « Apatite fission-track thermochronology of southern Rocky Mountain-Rio Grande rift-Western High Plains Province ». Dans 46th Annual Fall Field Conference. New Mexico Geological Society, 1995. http://dx.doi.org/10.56577/ffc-46.87.

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Jess, Scott, Heike Gröger, Alexander Peace et Christian Schiffer. « COMPILATION OF APATITE FISSION-TRACK DATA FROM ACROSS THE NORTH ATLANTIC : REGIONAL TRENDS AND INTERPRETATIONS ». Dans GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-370104.

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Bowden, Shelby, Nahid D. Gani, M. C. Van Soest, M. Royhan Gani et Paul O’Sullivan. « UNROOFING HISTORY OF THE WESTERN ETHIOPIAN PLATEAU : INSIGHTS FROM APATITE (U-TH)/HE AND FISSION TRACK THERMOCHRONOLOGY ». Dans GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-319982.

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Kelley, Shari A., Charles E. Chapin, Steven M. Cather et Mark Person. « Thermal history of the Eastern Socorro Basin, Socorro County, New Mexico, based on apatite fission-track thermochronology ». Dans 60th Annual Fall Field Conference. New Mexico Geological Society, 2009. http://dx.doi.org/10.56577/ffc-60.347.

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Ge, Xiang, Chuanbo Shen, Hongguo Ji, Zhaoqian Liu, Lianfu Mei, Dafei Deng et David Selby. « Constraining the timing of dry gas formation : Insights from re-Os and apatite fission track geochronology from south Guizhou (china) ». Dans International Conference and Exhibition, Barcelona, Spain, 3-6 April 2016. Society of Exploration Geophysicists and American Association of Petroleum Geologists, 2016. http://dx.doi.org/10.1190/ice2016-6350416.1.

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Rapports d'organisations sur le sujet "Apatite fission tracks"

Issler, D. R., et S. D. Willett. Inverse modelling of apatite fission track data. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1998. http://dx.doi.org/10.4095/209397.

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Pinet, N., et V. Brake. Preliminary compilation of apatite fission-track data in Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2018. http://dx.doi.org/10.4095/308443.

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Solie, D. N., P. B. O'Sullivan, M. B. Werdon et R. R. Lessard. Apatite fission track data, Alaska Highway corridor, Mount Hayes Quadrangle, Alaska. Alaska Division of Geological & Geophysical Surveys, décembre 2013. http://dx.doi.org/10.14509/26861.

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Issler, D. R., L. S. Lane et P. B. O'Sullivan. Characterization, interpretation, and modelling of multikinetic apatite fission-track data using elemental data. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2018. http://dx.doi.org/10.4095/311302.

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O'Sullivan, P. B., R. A. Donelick, K. G. Osadetz, C. A. Evenchick, F. Ferri, N. S. F. Wilson et M. Hayes. Apatite fission-track data from seventy-one Bowser and Sustut basin rock samples. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2005. http://dx.doi.org/10.4095/220355.

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Bergman, S. C., J. Decker, S. Kelley et J. Talbot. Apatite and zircon fission track analyses of 9 selected wells in the NPRA, Alaska. Alaska Division of Geological & Geophysical Surveys, 1991. http://dx.doi.org/10.14509/19247.

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Issler, D. R., S. D. Willett, C. Beaumont, R. A. Donelick et A M Grist. Paleotemperature history of the Peace River Arch region : constraints from apatite fission track analysis. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1997. http://dx.doi.org/10.4095/209175.

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Lane, L. S., K. M. Bell et D. R. Issler. Overview of the age, evolution, and petroleum potential of the Eagle Plain Basin, Yukon. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/326092.

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New mapping, biostratigraphy, geochemistry, and organic petrology results have led to new insights into the structural evolution, depositional history, and resource potential of the Eagle Plain Basin. Apatite fission-track modelling resolves at least two distinct heating-cooling cycles and suggests that sediment was sourced from the east, as well as from the south. A recently identified marine-slope setting in the west of the basin represents a new petroleum play. Advances in understanding the age and depositional history of the Eagle Plain Group derive from new fossil localities, a new bentonite age, and detrital zircon data. Initiated in the Cenomanian, or possibly latest Albian, deposition continued until the late Maastrichtian, although post-Coniacian deposits may have been subsequently eroded, or bypassed across southern parts of the basin. New petroleum resource appraisals include new petroleum exploration-play concepts, as well as qualitative assessments of unconventional oil and gas potential.

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O'Sullivan, P. B., C. A. Evenchick, K. G. Osadetz, F. Ferri et R A Donelick. Apatite fission track data for seventeen rock samples from the Bowser and Sustut basins, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2009. http://dx.doi.org/10.4095/248204.

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McDannell, K. T., N. Pinet et D. R. Issler. Exhuming the Canadian Shield : preliminary interpretations from low-temperature thermochronology and significance for the sedimentary succession of the Hudson Bay Basin. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/326100.

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The geological history of the Canadian Shield is difficult to constrain because the sedimentary record is missing in those areas where Precambrian basement is exposed at the surface. This study presents preliminary results and interpretations of new apatite fission-track (AFT) analyses to elucidate the low-temperature (&lt;120°C) history across Canada. The AFT modelling of samples from Southampton Island, in Nunavut, indicates that maximum temperatures varied between 62°C and 93°C during the Phanerozoic. Maximum burial occurred in the Devonian, but a second phase of Mesozoic burial is proposed, especially in the case for the sample recovered closest to the northern island-bounding normal faults. The AFT modelling of a sample from northern Ontario indicates that a maximum burial temperature of approximately 75°C was reached during the Late Devonian. Overall, these results demonstrate that the Hudson Bay sedimentary succession is the remnant of a more extensive and thicker sedimentary cover than is preserved. This study also provides the opportunity to discuss innovative methodology and modelling approaches for low-temperature thermochronology.

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