Relevant bibliographies by topics / Th dating

Academic literature on the topic 'Th dating'

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Published: 1 April 2023

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Journal articles on the topic "Th dating"

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Wendt, Kathleen A., Xianglei Li, and R. Lawrence Edwards. "Uranium–Thorium Dating of Speleothems." Elements 17, no. 2 (April 1, 2021): 87–92. http://dx.doi.org/10.2138/gselements.17.2.87.

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Speleothems are important timekeepers of Earth’s climate history. A key advantage of speleothems is that they can be dated using U–Th techniques. Mass spectrometric methods for measuring U and Th isotopes has led to vast improvements in measurement precision and a dramatic reduction in sample size. As a result, the timing of past climate, environment, and Earth system changes can be investigated at exceptional temporal precision. In this review, we summarize the principles and history of U–Th dating of speleothems. Finally, we highlight three studies that use U–Th dated speleothems to investigate past changes to the Asian monsoon, constrain the timing of sociopolitical change in ancient civilizations, and develop a speleothem-based calibration of the 14C timescale.
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Min, Kyoung-Won. "(U-Th)/He Dating: Principles and Applications." Journal of the Petrological Society of Korea 23, no. 3 (September 30, 2014): 239–47. http://dx.doi.org/10.7854/jpsk.2014.23.3.239.

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Frebel, Anna, and Karl-Ludwig Kratz. "Stellar age dating with thorium, uranium and lead." Proceedings of the International Astronomical Union 4, S258 (October 2008): 449–56. http://dx.doi.org/10.1017/s1743921309032104.

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AbstractWe present HE 1523-0901, a metal-poor star in which the radioactive elements Th and U could be detected. Only three stars have measured U abundances, of which HE 1523-0901 has the most confidently determined value. From comparing the stable Eu, Os, and Ir abundances with measurements of Th and U, stellar ages can be derived. Based on seven such chronometer abundance ratios, the age of HE 1523-0901 was found to be ~13 Gyr. Only an upper limit for Pb could be measured so far. Knowing all three abundances of Th, U, and Pb would provide a self-consistent test for r-process calculations. Pb is the beta- plus alpha-decay end-product of all decay chains in the mass region between Pb and the onset of dominant spontaneous fission above Th and U. Hence, in addition to Th/U also Th, U/Pb should be used to obtain a consistent picture for actinide chronometry. From recent r-process calculations within the classical “waiting-point” model, for a 13 Gyr old star we predict the respective abundance ratios of logϵ(Th/U) = 0.84, logϵ(Th/Pb) = −1.32 and logϵ(U/Pb) = −2.16. We compare these values with the measured abundance ratios in HE 1523-0901 of logϵ(Th/U) = 0.86, logϵ(Th/Pb) > −1.0 and logϵ(U/Pb) > −1.9. With this good level of agreement, HE 1523-0901 is already a vital probe for observational “near-field” cosmology by providing an independent lower limit for the age of the Universe.
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Yakubovich, Olga, Mary Podolskaya, Ilya Vikentyev, Elena Fokina, and Alexander Kotov. "U-Th-He Geochronology of Pyrite from the Uzelga VMS Deposit (South Urals)—New Perspectives for Direct Dating of the Ore-Forming Processes." Minerals 10, no. 7 (July 16, 2020): 629. http://dx.doi.org/10.3390/min10070629.

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We report on the application of the U-Th-He method for the direct dating of pyrite and provide an original methodological approach for measurement of U, Th and He in single grains without loss of parent nuclides during thermal extraction of He. The U-Th-He age of ten samples of high-crystalline stoichiometric pyrite from unoxidized massive ores of the Uzelga volcanogenic massive sulfide (VMS) deposit, South Urals, is 382 ± 12 Ma (2σ) (U concentrations ~1–5 ppm; 4He ~10−4 cm3 STP g−1). This age is consistent with independent (biostratigraphic) estimations of the age of ore formation (ca, 389–380 Ma) and is remarkably older than the probable age of the regional prehnite-pumpellyite facies metamorphism (~340–345 Ma). Our results indicate that the U-Th-He dating of ~1 mg weight pyrite sample is possible and open new perspectives for the dating of ore deposits. The relative simplicity of U-Th-He dating in comparison with other geochronological methods makes this approach interesting for further application.
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Li, Qiuli, Yu Liu, Guoqiang Tang, Kaiyi Wang, Xiaoxiao Ling, and Jiao Li. "Zircon Th–Pb dating by secondary ion mass spectrometry." Journal of Analytical Atomic Spectrometry 33, no. 9 (2018): 1536–44. http://dx.doi.org/10.1039/c8ja00125a.

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M257 and Qinghu zircons are suggested as more suitable Th–Pb dating standards with higher radiogenic 208Pb. The correlation between the apparent Th–Pb age and the corresponding Th content points out the radiogenic lead loss.
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Harrison, T. M., E. J. Catlos, and J. M. Montel. "U-Th-Pb Dating of Phosphate Minerals." Reviews in Mineralogy and Geochemistry 48, no. 1 (January 1, 2002): 524–58. http://dx.doi.org/10.2138/rmg.2002.48.14.

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Cheng, Hai, Jess Adkins, R. Lawrence Edwards, and Edward A. Boyle. "U-Th dating of deep-sea corals." Geochimica et Cosmochimica Acta 64, no. 14 (July 2000): 2401–16. http://dx.doi.org/10.1016/s0016-7037(99)00422-6.

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Catlos, E. J., Sorena S. Sorensen, and T. Mark Harrison. "Th-Pb ion-microprobe dating of allanite." American Mineralogist 85, no. 5-6 (May 2000): 633–48. http://dx.doi.org/10.2138/am-2000-5-601.

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Nuriel, Perach, Gideon Rosenbaum, Jian-Xin Zhao, Yuexing Feng, Suzanne D. Golding, Benoît Villemant, and Ram Weinberger. "U-Th dating of striated fault planes." Geology 40, no. 7 (July 2012): 647–50. http://dx.doi.org/10.1130/g32970.1.

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Hillaire-Marcel, C., C. Causse, O. Carro, J. Casanova, B. Ghaleb, and C. Goetz. "Th/U dating of open carbonate systems." Chemical Geology 70, no. 1-2 (August 1988): 127. http://dx.doi.org/10.1016/0009-2541(88)90562-1.

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Dissertations / Theses on the topic "Th dating"

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Loehn, Clayton William. "Investigation of the monazite chemical dating technique." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27688.

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In order to evaluate the electron microprobe (EMP) method for chemical dating of monazite, we chemically analyzed selected suites of monazite grains that were previously dated by standard U/Pb isotopic methods at three laboratories each equipped with a sensitive high resolution ion microprobe (SHRIMP). Representing diverse igneous and metamorphic lithologies, these grains yielded conventional isotopic ages ranging in age from Neoarchean to Devonian. Chemical dating was performed at Virginia Tech using a Cameca SX-50 EMP in which the analytical routines and settings were specifically optimized for monazite geochronology, including correction of analytical peaks for all major spectral interferences and correction of peak intensities for local background emission. Placement of cross-grain analytical traverses was based on backscattered electron (BSE) images together with wavelength-dispersive (WD) generated X-ray maps for Y, Th, U, and Ca, which revealed the internal compositional complexity of each grain. Shorter EMP traverses were selected adjacent to each SHRIMP pit in order to provide the best possible comparison of ages obtained by the two dating methods. Synthesis protocol for key elemental measurements (Y, Th, U, and Pb) was developed utilizing the 1Ï elemental errors associated with individual analyses, providing an objective approach for data synthesis. Analytical dates were either accepted or excluded based on analytical and spatial justifications. Isotopic dating techniques utilize three independent age calculations, provided the sample is old enough to have accumulated sufficient 207Pb (i.e., â ¥~1000 Ma). Similarly, the chemical dating method can utilize two independent age calculations (i.e., Th/Pb and U/Pb) and a U-Th-Pbtotal centroid age in Th/Pb vs. U/Pb space, verified independently against the calculated Th* or U* CHIME ages. Across the entire 2,200 m.y. age range represented by the sample set, the chemical ages calculated from the EMP data chemical ages are internally consistent (within 2Ï error) with the previously measured SHRIMP isotopic ages, except in one case where bulk mixing of discrete age domains within an ablation pit led to an isotopically discordant apparent age. Overall, this study illustrates that EMP chemical dating (1) represents both an accurate and precise primary method for dating monazite from igneous and polymetamorphic terrains; (2) provides superior spatial resolution for obtaining meaningful ages from small and/or irregular domains of discrete age that may be irresolvable or misinterpreted by other dating techniques that sample larger volumes; and (3) illuminates the geological meaning of isotopically discordant monazite ages obtained using conventional methods with lower spatial resolution (e.g., SHRIMP).
Ph. D.
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Simons, Suzanne Lee. "U-Th-Pb systematics of opaline silica: Implications for the dating of surface processes." Thesis, Curtin University, 2015. http://hdl.handle.net/20.500.11937/36.

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U–Pb and U-series analyses of U-rich, relative to both Th and Pb, opal samples using sensitive high-resolution ion microprobe (SHRIMP) demonstrate the ability of this technique for dating opals with ages ranging from several tens of thousands of years to millions of years and from a variety of deposition environments. This experimental study increases the understanding of opal as a geochronometer and explores the stability of U-Th-Pb systematics in opaline silica.
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Placzek, Christa. "Stratigraphy, Geochronology and Geochemistry of Paleolakes on the Southern Bolivian Altiplano." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/194352.

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Precise chronologies of climate events in the tropics are rare yet essential for understanding how tropical climate relates to global climate at millennial to longer time scales. An increasingly important area for understanding these interactions is the southern Bolivian Altiplano (15-22oS) which represents the waning and southeastern end of the South American Monsoon, a system that is, today, modulated by regional upper-air circulation anomalies under the influence of tropical Pacific sea-surface temperature gradients associated with El Niño/Southern Oscillation (ENSO). Mechanisms of summer rainfall variations on millennial and longer time scales are less well understood, despite well-established evidence for profound changes in hydrologic budgets on the southern Bolivian Altiplano. Large shifts in effective moisture on the southern Bolivian Altiplano produced deep lakes in the Poopo, Coipasa, and Uyuni basins, basins that are currently occupied by salt pans or very shallow lakes. We mapped shoreline stratigraphy and sampled carbonates for over 170 uranium-thorium (U-Th) and radiocarbon (14C) dates to refine paleolake history of the Southern Bolivian Altiplano. As part of this dissertation work, I helped assemble a U-Th dating facility at the University of Arizona and obtained over 90 uranium-thorium (U-Th) dates from paleolake carbonates. Carbonate textures were evaluated for potential diagenetic effects, but the principal consideration in dating such carbonates is the isotopic composition and quantity of initial Th incorporated into the carbonate. We establish criteria for statigraphically meaningful dates and strategies for successful U-Th dating of paleolake carbonates. The stable isotope, 87-strontium/86-strontium (87Sr/86Sr), and 234U/238U ratios of modern surface waters and of paleolake carbonates can be used as tracers of the region's various lake cycles and provides a test hydrologic models of these lake cycles.Volcanic tuffs provide important stratigraphic markers for paleolimnologic, geomorphic, and archeological studies. Despite the widespread occurrence of late Quaternary tuffs on the Bolivian Altiplano, few of these deposits have been previously recognized either from natural exposures or in paleolake sediment cores. We document the presence of 38 distal tuffs in Quaternary lacustrine and alluvial deposits, and determine the composition of glass and phenocrysts by electron microprobe analyses.
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Guenthner, William Rexford. "Zircon (U-Th)/He Dates from Radiation Damaged Crystals: A New Damage-He Diffusivity Model for the Zircon (U-Th)/He Thermochronometer." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/306783.

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Zircon (U-Th)/He (zircon He) dating has become a widely used thermochronologic method in the geosciences. Practitioners have traditionally interpreted (U-Th)/He dates from zircons across a broad spectrum of chemical compositions with a single set of ⁴He diffusion kinetics derived from only a handful of crystals (Reiners et al., 2004). However, it has become increasingly clear that a "one-size-fits-all" approach to these kinetics is inadequate, leading to erroneous conclusions and incongruent data. This dissertation develops a more grain-specific approach by showing the fundamental role that intracrystalline radiation damage plays in determining the He diffusivity in a given zircon. I present three appendices that seek to quantify the radiation damage effect on He diffusion in zircon, explain how this effect manifests in zircon He dates, and show how to exploit such manifestations to better constrain sample thermal histories. Of particular importance, this dissertation represents the first comprehensive study to concentrate on the entire damage spectrum found in natural zircon and also the first to show that two different mechanisms affect He diffusion in zircon in different ways across this spectrum. In the first appendix, I and my fellow co-authors describe results from a series of step-heating experiments that show how the alpha dose of a given zircon, which we interpret to be correlated with accumulated radiation damage, influences its He diffusivity. From 1.2 × 10¹⁶ α/g to 1.4 × 10¹⁸ α/g, He diffusivity at a given temperature decreases by three orders of magnitude, but as alpha dose increases from ~2 × 10¹⁸ α/g to 8.2 × 10¹⁸ α/g, He diffusivity then increases by about nine orders of magnitude. We parameterize both the initial decrease and eventual increase in diffusivity with alpha dose with a function that describes these changes in terms of increasing abundance and size of intracrystalline radiation damage zones and resulting effects on the tortuosity of He migration pathways and dual-domain behavior. This is combined with another equation that describes damage annealing in zircon. The end result is a new model that constrains the coevolution of damage, He diffusivity, and He date in zircon as a function of its actinide content and thermal history. The second and third appendices use this new model to decipher zircon He datasets comprising many single grain dates that are correlated with effective uranium (eU, a proxy for the relative degree of radiation damage among grains from the same sample). The model is critical for proper interpretation of results from igneous settings that show date-eU correlations and were once considered spurious (appendix B). When applied to partially reset sedimentary rocks, other sources of date variability, such as damage and He inheritance, have to be considered as well (appendix C).
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Burnside, Neil Murray. "U-Th dating of travertines on the Colorado Plateau : implications for the leakage of geologically stored CO2." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1988/.

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In order to avoid the damaging climatic consequences of rising atmospheric CO2, and reduce current atmospheric CO2 concentrations to pre-industrial levels, anthropogenic CO2 emissions must be mitigated by capturing CO2 at power plants and storing it for thousands of years. Underground storage within deep geological formations, such as depleted gas and oil fields or deep saline aquifers, is the best understood solution for storage of CO2. In order for this method to gain more public and political acceptance it is important to characterise the potential causes, quantities and rates of CO2 release that could result if leakage were to occur from anthropogenic storage projects. This study examines two sites in the Colorado Plateau where faulted and actively leaking CO2 reservoirs provide natural analogues for failed anthropogenic storage sites. The two sites in question, the Little Grand Wash and northern Salt Wash graben faults are situated at the northern end of the Paradox Basin in Utah and represent classic three way traps due to juxtaposition of the shallow, north plunging Green River anticline against a set of east-west trending normal faults. In addition to active leakage sites in each area there are numerous fossilised travertine deposits. Along the Little Grand Wash fault the ancient mounds are restricted to the fault trace whereas ancient travertine mounds associated with the northern fault of the Salt Wash graben are far more numerous and occur up to ~530 m into the footwall of the fault. This more diffuse pattern of flow is due to the outcropping of unconfined aquifer units at the surface. A total of 45 U-Th dates from the majority of these travertine mounds provides a unique data set. The oldest deposits from the Little Grand Wash and northern Salt Wash graben faults produced ages of 113,912 ± 604 and 413,474 ± 15,127 years respectively. Repeat ages show reasonable reproducibility and analytical errors on results are of the order of 1% of the ages. The coupling of travertine elevation measurements with their radiometric ages gives an incision rate for each site. A rate of 0.342 m/ka for the Little Grand Wash fault relates directly to Green River incision and agrees with previous work on the Colorado Plateau, providing a further data point for characterisation of uplift of the province. For the northern fault of the Salt Wash graben a rate of 0.168 m/ka for the tributaries running through the area gives a robust method with which to estimate ages for un-dated mounds. The results of radiometric dating and incision rate age estimation of travertine mounds shows that leakage can last for timescales of 100,000’s of years, while high resolution U-Th dating of an individual mound demonstrated that leakage from a single point can last for a minimum of ~11,000 years. A range of travertine ages show that leakage to the surface has constantly switched location through time, while the presence of three mounds of distinct age at one location demonstrate that pathways can become repeatedly re-used over periods of ~45,000 years. There is no evidence of temporal periodicity in travertine deposition but there is a distinct spatial pattern of leakage as shown by localised similarities in the initial uranium chemistries of travertine mounds. Initial leakage is proximally located to the axial trace of the Green River anticline and subsequent leakage spreads from this central point along the fault plane in both east and west directions. The switching of fluid flow pathways to the surface can be explained by three main mechanisms: mineralisation, 3-phase interference of CO2 related fluid flow and seismically triggered alteration in dynamic strain acting upon the hydrology of the faults. These mechanisms have differing influences in each area - demonstrating that the behaviour of fluid flow switching in a system confined to damage zone fractures (Little Grand Wash fault) is different to a system leaking through an unconfined aquifer (northern fault of the Salt Wash graben). Coupling of travertine ages with estimates of their volumes provided a total worse case scenario for quantity of CO2 leakage of 6.2 x 10^6 ± 1.7 x 10^6 tonnes for the Little Grand Wash fault and 7.4 x 10^6 ± 2 x 10^6 tonnes for the northern fault of the Salt Wash graben. From these totals time averaged leakage rates of 55 ± 15 and 47 ± 13 tonnes/year were estimated for each fault. The leakage rate for the actively precipitating Crystal Geyser travertine (which is the result of anthropogenic exploration drilling) is estimated to be 3,153 ± 851 tonnes/year. These total and modern rates provide analogues for leakage via caprock failure and catastrophic wellbore failure. Applying them to large scale storage sites such as Weyburn and Gorgon revealed that for caprock failure complete leakage of these reservoirs will take place over timescales of 10^5-10^6 years, while for catastrophic failure of a single well complete leakage of these reservoirs could occur over as little as 10^3 – 10^4 years. This finding has important implications for the successful monitoring of anthropogenic storage sites.
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Dean, J. R. "Stable isotope analysis and U-Th dating of late glacial and Holocene lacustrine sediments from central Turkey." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14090/.

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Water is a politically sensitive resource in the Near East and water stress is increasing. It is therefore vital that there is a strong understanding of past hydrological variability, so that the drivers of change can be better understood, and so that the links between the palaeoclimate and archaeological records in this key region in the development of human civilisation can be investigated. To be of most use, this requires high resolution records and a good understanding of palaeoseasonality. A sediment sequence spanning ~14,000 years has been retrieved from Nar Gölü, a lake in central Turkey. This thesis presents isotope data from carbonates, diatoms and bulk organic matter, in particular focussing on oxygen isotope (δ18O) analysis of carbonates (which detailed monitoring of the modern lake system shows to be a strong proxy for water balance) and comparing δ18Ocarbonate and δ18Odiatom data in order to examine palaeoseasonality. Improved techniques for the interpretation of carbonate isotope records of mixed mineralogies and the mass balance correction of diatom samples contaminated with minerogenic material are also proposed. Due to the high resolution δ18Ocarbonate data, it was possible to show that the rapidity of the Younger Dryas to Holocene transition at Nar Gölü was similar to that seen in North Atlantic records and that centennial scale arid events in the Holocene seem to occur at the time of cold periods in the North Atlantic. Taken together, this suggests a strong teleconnection between the two regions. However, the longer duration of the aridity peaks ~9,300 and ~8,200 years BP at Nar Gölü, compared with the more discrete cooling events at this time in the North Atlantic, suggest that there are additional controls on Near East hydroclimate. There is a multi-millennial scale trend of increasing δ18Ocarbonate values from the early to late Holocene. This ‘Mid Holocene Transition’ has previously been identified in the Near East, however here it is demonstrated that water balance and not a shift in the seasonality of precipitation was the primary cause. Finally, for the first time, the stability of Near East climate in the early Holocene is robustly demonstrated, suggesting that this could have been a key enabler of the development of agriculture at this time.
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Yamada, Kunimi. "Thermochronology using (U-Th)/He dating method : investigation for effects of secular disequilibrium on (U-Th)/He ages and uplift history of the Tanzawa mountains in the south Fossa Magna region." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144205.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(理学)
甲第12122号
理博第3016号
新制||理||1450(附属図書館)
23958
UT51-2006-J117
京都大学大学院理学研究科地球惑星科学専攻
(主査)助教授 田上 高広, 教授 嶋本 利彦, 教授 小畑 正明
学位規則第4条第1項該当
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Xia, Qikai. "High precision TIMS U-Th disequilibrium dating and C, O, Sr isotope-based multi-proxy palaeoclimatic study of Speleothems in Australia /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18421.pdf.

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Adams, Byron A. "Exhumation and incision history of the Lahul Himalaya, northern India, based on (U-Th)/He thermochronometry and terrestrial cosmogenic nuclide dating techniques." Cincinnati, Ohio : University of Cincinnati, 2007. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1180546920.

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Thesis (M.S.)--University of Cincinnati, 2007.
Title from electronic thesis title page (viewed Oct. 8, 2007). Includes abstract. Keywords: Lahul, Himalaya, exhumation, incision, thermochronometry, terrestrial cosmogenic nuclides, strath terraces. Includes bibliographical references.
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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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Books on the topic "Th dating"

1

Krishnaswami, S., and J. Kirk Cochran. U-Th Series Nuclides in Aquatic Systems. Elsevier Science & Technology Books, 2011.

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(Editor), S. Krishnaswami, Kirk J. Cochran (Editor), and M. Baxter (Series Editor), eds. U-Th Series Nuclides in Aquatic Systems, Volume 13 (Radioactivity in the Environment). Elsevier Science, 2008.

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Borodovsky, A. P., and S. V. Gorokhov. Umrevinsky ostrog: Results of the 2010–2017 archaeological research. IAET SB RAS Publishing, 2020. http://dx.doi.org/10.17746/7803-0307-7.2020.

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Th e monograph is the fi rst source to fully introduce into scientifi c discourse the results of the comprehensive studies of the representative item of the Early Modern Period in the Upper Ob region, the Umrevinsky ostrog, that were conducted in 2010–2017 and are still under way. It is discovered that the cultural layer of this archaeological monument contains structures and artifacts dating back by their traditions to the Moscow Tzardom and the Peter I period. Th e research of an extensive necropolis of the Umrevinsky ostrog and analysis of the metal composition of those cross pendants discovered in the territory of the monument allowed attributing the chronology of its appearance and existence. Th e appendix dwells in detail upon the written sources related to the Umrevinsky ostrog and academic missions of the fi rst half of the 18th century, during which the fi rst items of the archaeological heritage in the territory of Novosibirsk region were found. Th e publication is meant for archaeologists, ethnographists, historians, local historians, museum employees, teachers, and students of the departments of history of higher education establishments.
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Book chapters on the topic "Th dating"

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Zeitler, Peter K. "U–Th/He Dating." In Encyclopedia of Scientific Dating Methods, 932–40. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6304-3_131.

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Zeitler, Peter K. "U-Th/He Dating." In Encyclopedia of Scientific Dating Methods, 1–14. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6326-5_131-1.

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Harrison, T. Mark, Elizabeth J. Catlos, and Jean-Marc Montel. "14. U-Th-Pb Dating of Phosphate Minerals." In Phosphates, edited by Matthew J. Kohn, John Rakovan, and John M. Hughes, 523–58. Berlin, Boston: De Gruyter, 2002. http://dx.doi.org/10.1515/9781501509636-017.

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Farley, Kenneth A. "18. (U-Th)/He Dating: Techniques, Calibrations, and Applications." In Noble Gases, edited by Donald P. Porcelli, Chris J. Ballentine, and Rainer Wieler, 819–46. Berlin, Boston: De Gruyter, 2002. http://dx.doi.org/10.1515/9781501509056-020.

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Farley, Kenneth A., and Daniel F. Stockli. "15. (U-Th)/He Dating of Phosphates: Apatite, Monazite, and Xenotime." In Phosphates, edited by Matthew J. Kohn, John Rakovan, and John M. Hughes, 559–78. Berlin, Boston: De Gruyter, 2002. http://dx.doi.org/10.1515/9781501509636-018.

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Bahain, J. J., G. Burrafato, C. Falguères, A. M. Gueli, G. Stella, S. O. Troja, and A. R. Zuccarello. "ESR and U/Th Dating Methodologies Applied to Carbonates from Southern Italy." In Proceedings of the 37th International Symposium on Archaeometry, 13th - 16th May 2008, Siena, Italy, 481–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14678-7_70.

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Condon, Daniel J., Martin J. Whitehouse, and Matthew S. A. Horstwood. "Radiometric Dating (U-Th-Pb)." In Encyclopedia of Geology, 26–49. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-08-102908-4.00166-1.

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Shcherbakova, Marina I. "Additions to the attribution of archival documents of the Manuscripts Department of the Russian State Library." In Literary process in Russia of the 18 th — 19 th centuries. Secular and spiritual literature, 493–518. А.M. Gorky Institute of World Literature of the Russian Academy of Sciences, 2020. http://dx.doi.org/10.22455/lit.pr.2020-2-493-518.

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The issue of significance of attribution for establishing the history of the creation of handwritten documents is discussed in the article using the examples of a copy of the working note of Saint Theophan the Recluse «Reservations in the book “Orthodox Worshipers in Jerusalem” » (1858) from the archive of the Russian Saint Panteleimon Monastery; made by Andrey Murav’yov as a translation of the Greek letter of Archimandrite Joasaph (1851), rector of the Holy Lavra of Saint Sabbas in Palestine; letters from nun Leonida (worldly Yelizaveta Obukhova), the female treasurer of convent of Saints Boris and Gleb in the hamlet of Anosino, to Archbishop Leonid (worldly Lev Krasnopevkov) and to his elder sister Nun Leonida (worldly Yekaterina Ushakova); and also letters to Archbishop Leonid from the two clerics both named Nafanail — Archimandrite Nafanail (worldly Gavriil Nektarov) and Archbishop Nafanail (worldly Nikolay Savchenko). Amendments, clarifications and important additions are made to the existing attribution of these documents based on the results of the investigations undertaken. Various methods of attribution — an analysis of the content of the source, of its culturally historical features, stylistic features, references to historical events, to the realities of life, to famous people — are demonstrated. The close association of attribution with the dating of the archive document, which in many cases helps to establish both the author and the addressee of the source, is revealed. The practical demand for attribution results is convincingly reasoned.
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Araoka, Daisuke. "Radiocarbon and U/Th dating of tsunami- and storm-transported coarse clasts." In Geological Records of Tsunamis and Other Extreme Waves, 687–703. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-815686-5.00031-6.

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Henderson, G. M., R. H. Rendle, N. C. Slowey, and J. J. G. Reijmer. "U-Th dating and diagenesis of Pleistocene highstand sediments from the Bahamas Slope." In Proceedings of the Ocean Drilling Program. Ocean Drilling Program, 2000. http://dx.doi.org/10.2973/odp.proc.sr.166.106.2000.

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Conference papers on the topic "Th dating"

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Trinquier, Anne, Germain Bayon, Evan Edinger, and Stephan Jorry. "Reassessing Coral U-Th Dating." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2625.

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Lowenstein, Tim K., Shangde Luo, Kennie Leet, Emma P. McNulty, R. Bernhart Owen, Chuan-Chou Shen, Robin W. Renaut, et al. "U-TH DISEQUILIBRIUM DATING OF LAKE MAGADI CHERTS." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-299930.

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Schoene, Blair, John Cottle, and Michael P. Eddy. "SPEED DATING!: SAMPLING AND APPLICATIONS FOR U-TH-PB GEOCHRONOLOGY." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-305394.

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Ault, Alexis K., William R. Guenthner, and Robert G. Mcdermott. "SPEED DATING!: ADVICE ON SAMPLING AND APPLICATIONS FOR (U-TH)/HE THERMOCHRONOMETRY." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-305251.

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Niespolo, Elizabeth, Warren Sharp, Warren Sharp, Nicholas Fylstra, Nicholas Fylstra, Christian A. Tryon, Christian A. Tryon, et al. "U-TH BURIAL DATING OF OSTRICH EGGSHELLS: A NOVEL APPROACH TO DATING AFRICAN ARCHAEOLOGICAL SEQUENCES BEYOND THE 14C LIMIT." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-307769.

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Fearey, B. L., and B. M. Tissue. "High-resolution spectroscopy of Th and Pa isotopes." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.mkk7.

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Doppler-free spectroscopy has been performed on thorium and protactinium isotopes to gain a detailed understanding of the underlying physics of spectral features. Characterizing phenomena such as Lamb dips and optical pumping are important in understanding and optimizing resonance ionization mass spectrometry (RIMS) analysis. Measurement of these isotopes by RIMS is used in U-series disequilibrium dating of geological samples of the last 400,000 years. Isotope shifts and hyperfine structure of 232Th, 230Th, 229Th, 233Pa, and 231Pa are reported for several transitions. The Doppler-free spectra of Th showed an interesting effect, which was strongly dependent on laser power, in which a narrow peak replaced the usual Lamb dip. These results and a detailed analysis will be presented and discussed.
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Burgess, Seth, Jorge Vazquez, Christopher F. Waythomas, and Kristi Wallace. "DATING THE QUATERNARY OLD CROW TEPHRA VIA ZIRCON U-TH-PB-HE GEOCHRONOMETERS." In GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-366889.

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Tomonaga, Yama, Edith Horstmann, Gaudenz Deplazes, and Rolf Kipfer. "4He/U-Th Dating of Pore Waters from Quaternary Sediments of the Swiss Midland." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2609.

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Balbas, Andrea, and Kenneth A. Farley. "HELIUM RETENTION IN SPELEOTHEMS AND ITS INFERENCES FOR POTENTIAL U/TH-HE AGE DATING." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-319766.

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McDermott, Robert, Douglas Kreiner, James V. Jones, and Sean Regan. "TRACKING ALASKA’S PORPHYRY CU SYSTEMS WITH DETRITAL MAGNETITE GEOCHEMISTRY AND (U-TH)/HE DATING." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-380863.

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Reports on the topic "Th dating"

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Shulaker, D., M. Savina, and B. Isselhardt. Th-U-dating. Office of Scientific and Technical Information (OSTI), August 2022. http://dx.doi.org/10.2172/1883014.

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