Готові списки джерел за темами / Apatite Helium

Добірка наукової літератури з теми "Apatite Helium"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 28 січня 2023

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Статті в журналах з теми "Apatite Helium"

Cherniak, D. J., E. B. Watson, and J. B. Thomas. "Diffusion of helium in zircon and apatite." Chemical Geology 268, no. 1-2 (October 2009): 155–66. http://dx.doi.org/10.1016/j.chemgeo.2009.08.011.

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Zeitler, Peter K., Eva Enkelmann, Jay B. Thomas, E. Bruce Watson, Leonard D. Ancuta, and Bruce D. Idleman. "Solubility and trapping of helium in apatite." Geochimica et Cosmochimica Acta 209 (July 2017): 1–8. http://dx.doi.org/10.1016/j.gca.2017.03.041.

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Wolf, R. A., K. A. Farley, and L. T. Silver. "Helium diffusion and low-temperature thermochronometry of apatite." Geochimica et Cosmochimica Acta 60, no. 21 (November 1996): 4231–40. http://dx.doi.org/10.1016/s0016-7037(96)00192-5.

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Shuster, D. L., R. M. Flowers, and K. A. Farley. "Radiation damage and helium diffusion kinetics in apatite." Geochimica et Cosmochimica Acta 70, no. 18 (August 2006): A590. http://dx.doi.org/10.1016/j.gca.2006.06.1094.

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Idleman, Bruce D., Peter K. Zeitler, and Kalin T. McDannell. "Characterization of helium release from apatite by continuous ramped heating." Chemical Geology 476 (January 2018): 223–32. http://dx.doi.org/10.1016/j.chemgeo.2017.11.019.

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Farley, K. A. "Helium diffusion from apatite: General behavior as illustrated by Durango fluorapatite." Journal of Geophysical Research: Solid Earth 105, B2 (February 10, 2000): 2903–14. http://dx.doi.org/10.1029/1999jb900348.

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House, M. A., K. A. Farley, and D. Stockli. "Helium chronometry of apatite and titanite using Nd-YAG laser heating." Earth and Planetary Science Letters 183, no. 3-4 (December 2000): 365–68. http://dx.doi.org/10.1016/s0012-821x(00)00286-7.

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Willett, Chelsea D., Matthew Fox, and David L. Shuster. "A helium-based model for the effects of radiation damage annealing on helium diffusion kinetics in apatite." Earth and Planetary Science Letters 477 (November 2017): 195–204. http://dx.doi.org/10.1016/j.epsl.2017.07.047.

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Gautheron, Cécile, Rosella Pinna-Jamme, Alexis Derycke, Floriane Ahadi, Caroline Sanchez, Frédéric Haurine, Gael Monvoisin, et al. "Technical note: Analytical protocols and performance for apatite and zircon (U–Th) ∕ He analysis on quadrupole and magnetic sector mass spectrometer systems between 2007 and 2020." Geochronology 3, no. 1 (June 1, 2021): 351–70. http://dx.doi.org/10.5194/gchron-3-351-2021.

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Abstract. Apatite and zircon (U–Th) / He thermochronological data are obtained through a combination of crystal selection, He content measurement by crystal heating with analysis using noble gas mass spectrometry, and measurement of U, Th, and Sm contents by crystal dissolution as well as solution analysis using inductively coupled plasma mass spectrometry (ICP-MS). This contribution documents the methods for helium thermochronology used at the GEOPS laboratory, Paris-Saclay University, between 2007 and the present that allow apatite and zircon (U–Th) / He data to be obtained with precision. More specifically, we show that the He content can be determined with precision (at 5 %) and accuracy using a calibration of the He sensitivity based on the Durango apatite, and its use also appears crucial to check for He and U–Th–Sm analytical problems. The Durango apatite used as a standard is therefore a suitable mineral to perform precise He calibration and yields (U–Th) / He ages of 31.1 ± 1.4 Ma with an analytical error of less than 5 % (1σ). The (U–Th) / He ages for the Fish Canyon Tuff zircon standard yield a dispersion of about 9 % (1σ) with a mean age of 27.0 ± 2.6 Ma, which is comparable to other laboratories. For the long-term quality control of the (U–Th) / He data, attention is paid to evaluating the drift of He sensitivity and blanks through time as well as that of (U–Th) / He ages and Th / U ratios (with Sm / Th when possible), all relying on the use of Durango apatite and Fish Canyon Tuff zircon as standards.

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Murray, Kendra E., Devon A. Orme, and Peter W. Reiners. "Effects of U–Th-rich grain boundary phases on apatite helium ages." Chemical Geology 390 (December 2014): 135–51. http://dx.doi.org/10.1016/j.chemgeo.2014.09.023.

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Дисертації з теми "Apatite Helium"

Blackburn, Nathaniel C. "Apatite Helium Thermochronology of the Blue Nile Canyon, Ethiopian Plateau." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1563.

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The Ethiopian Plateau, situated in the northernmost part of the East African Rift System, has been uplifted and incised by the Blue Nile River, creating the 1.5 km-deep Blue Nile Canyon, the only extensive canyon within the Nile drainage basin. Much of this canyon incision is related to the Ethiopian Plateau uplift, which is due to a combined tectonic influence linked to the East African Rift System and the Afar Mantle Plumerelated upwelling since the Oligocene. The Blue Nile Canyon incision followed this plume-related upwelling, which resulted in extensive flood basalt emplacement around ~30 Ma. This study employs low-temperature apatite (U-Th)/He thermochronology to better understand the timeline and mode of the Blue Nile Canyon incision and the landscape geodynamics of the Ethiopian Plateau. Neoproterozoic basement rocks and Mesozoic sedimentary rock samples were collected in a vertical transect along the Blue Nile Canyon for AHe dating. Euhedral apatite grains that are inclusion-free and fractureless were selected for dating. The Australian Scientific Instrument (ASI) Alphachron and Inductively Coupled Plasma Mass Spectrometer (ICP-MS) measured the concentrations of radiogenic isotopes uranium (U), thorium (Th), and helium (He) to obtain apatite helium (AHe) dates, providing (U-Th)/He cooling ages ranging from 64 to 460 Ma. These AHe dates are much older than the 30 Ma flood basalt event, thus older than the canyon incision. In this study, a cooling/thermal history is suggested by explaining the data dispersion by the radiation damage effect in the dated apatite grains, which is related to He retention with time. The apatite suite has been subjected to protracted cooling, longer residence time in the He partial retention zone, and partial resetting due to Mesozoic rift-related burial and subsidence from deposition of ~1.2 kmthick sedimentary rocks, the extensive emplacement of ~1 km-thick flood basalt at 30 Ma, and differential incision. Radiation Damage Accumulation and Annealing Model (RDAAM) time-temperature thermal models indicate a rapid cooling event, suggesting rapid incision after 10 Ma, which is explained by an increase in uplift of the Ethiopian Plateau, likely due to mantle delamination.

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Recanati, Alice. "Thermochronométrie basse température (U-Th-Sm)/He : méthodologie et applications géodynamiques." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS038/document.

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Une première partie de cette thèse est méthodologique: elle vise à améliorer la thermochronométrie (U-Th-Sm)/He sur apatite et les modèles de diffusion actuels. Nous avons étudié le cas du Massif Armoricain (France), et celui des Alpes Suisses. Nos travaux montrent que la rétentivité en hélium des apatites est plus élevée que prévu par les modèles traditionnellement utilisés. Une approche statistique comprenant des algorithmes d'apprentissage montre que la composition chimique des grains ne semble pas jouer sur la rétentivité des apatites en hélium. Le principal paramètre contrôlant la dispersion des âges hélium est l'état d'endommagement des cristaux. Nous proposons une approche de physique/minéralogie expérimentale pour le caractériser à l'échelle nanométrique. Dans la dernière partie de la thèse, nous avons appliqué la méthode (U-Th-Sm)/He sur apatite au cas de la marge algérienne. Nous mettons en évidence une phase majeure de dénudation dans la région des Petites Kabylies au cours du Tortonien. Cette phase marque probablement le début de l'inversion de la marge, bien plus précocement que suggéré jusqu'alors
The first part of the thesis aims at improving the methodology and the models involved in apatite (U-Th-Sm)/He thermochronology. For this purpose, we studied two geological cases: the Armorican Massif (France) and the Swiss Alps. Our work suggests that apatite helium retentivity is higher than predicted in traditional models. A statistical approach using machine learning algorithms evidences that the apatite chemical composition of grains does not influence helium retentivity. The key parameter is the parent radionuclide and the crystal damage contents. We suggest an experimental procedure in order to characterize damage in apatite at the sub-micrometer scale. In the last part of the thesis, we applied the (U-Th-Sm)/He method to the Algerian Margin. We evidenced a major denudation phase in Petite Kabylie ("Lesser Kabylia") during the Tortonian times. This phase likely corresponds to the initiation of the margin inversion, earlier than previously suggested

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Trenouth, C. W. "An insight into the lowtemperature thermal evolution of the covered eastern Gawler Craton margin: the Stuart Shelf basement." Thesis, 2015. http://hdl.handle.net/2440/118240.

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Multi-method thermochronology applied to the eastern Gawler Craton, beneath the Stuart Shelf cover (Olympic Dam Domain, South Australia), reveals multiple episodes of exhumation. Modelled data from Apatite Fission Track (AFT) analysis identifies four time periods where the eastern Gawler Craton basement experienced cooling into AFT closure temperatures (~60-120°C); at1050 ± 55 Ma (Mesoproterozoic), 439 ± 14 Ma (late Ordovician-Silurian), 304 ±36 Ma (mid-Carboniferous-mid Permian) and 245 ± 52 Ma (late Permian-early Jurassic). In addition, the Carboniferous and Jurassic peaks are supported by zircon (ZHe) and apatite (AHe) (U-Th-Sm)/ He results. The Ordovician peak is interpreted as resulting from the final pulses of the Delamerian Orogeny partially, mixed with the first pulses of the Alice Springs Orogeny. The Carboniferous-Permian event is linked with widespread exhumation likely due to the final pulses of the Alice Springs Orogeny (~300Ma). The preserved Mesoproterozoic event presents new AFT data in the area and coincides with some recent studies. However, it occurs only in samples obtained from the Gawler Range Volcanics and more prominent in core depth shallower than 500m. The late Permian-early Jurassic event is comparable to events believed have to stemmed from hydrothermal events. This event compliments AFT studies in the northern Flinders Ranges. The Late Ordovician-Silurian and Carboniferous-early Permian AFT pulses confirm events seen in studies of surrounding regions. Other geochronological studies around the Olympic Dam area indicate that this pulse either results from a localised hydrothermal event or distal effects of the Musgravian Orogeny. The Jurassic event suggests that the hydrothermal effect on AFT ages may be a more widespread event and not just localised to the northern Flinders Ranges as previously thought. The Ordovician event represents mixing between Delamerian and Alice Springs Orogenies. The Carboniferous-Permian event represents late distal effects of the Alice Springs Orogeny. These events match those of surrounding regions.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2015

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Тези доповідей конференцій з теми "Apatite Helium"

Swallom, Meredith L., J. Ryan Thigpen, Rachel M. Hoar, Summer J. Brown, Michael M. McGlue, Edward W. Woolery, and William R. Guenthner. "CONSTRAINING SPATIAL AND TEMPORAL LANDSCAPE RESPONSE RATES TO TETON FAULT ACTIVITY THROUGH APATITE HELIUM THERMOCHRONOLOGY AND LIMNOGEOLOGY." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-322631.

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