Relevant bibliographies by topics / (U-Th)/He thermochronology

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  1. Journal articles
  2. Dissertations / Theses
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  4. Conference papers

Academic literature on the topic '(U-Th)/He thermochronology'

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Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "(U-Th)/He thermochronology"

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Peppe, Daniel J., and Peter W. Reiners. "Conodont (U–Th)/He thermochronology: Initial results, potential, and problems." Earth and Planetary Science Letters 258, no. 3-4 (June 2007): 569–80. http://dx.doi.org/10.1016/j.epsl.2007.04.022.

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Yamada, K., and T. Tagami. "(U–Th)/He thermochronology of the Tanzawa Tonalite complex, Japan." Geochimica et Cosmochimica Acta 70, no. 18 (August 2006): A716. http://dx.doi.org/10.1016/j.gca.2006.06.1286.

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Dai, Jingen, Chengshan Wang, Jeremy Hourigan, and M. Santosh. "Insights into the early Tibetan Plateau from (U–Th)/He thermochronology." Journal of the Geological Society 170, no. 6 (September 12, 2013): 917–27. http://dx.doi.org/10.1144/jgs2012-076.

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Robinson, Katherine H., Rebecca M. Flowers, and James R. Metcalf. "Rutile (U‐Th)/He Thermochronology: Temperature Sensitivity and Radiation Damage Effects." Geochemistry, Geophysics, Geosystems 20, no. 11 (November 2019): 4737–55. http://dx.doi.org/10.1029/2019gc008484.

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Gautheron, Cécile, Laurent Tassan-Got, Jocelyn Barbarand, and Maurice Pagel. "Effect of alpha-damage annealing on apatite (U–Th)/He thermochronology." Chemical Geology 266, no. 3-4 (August 2009): 157–70. http://dx.doi.org/10.1016/j.chemgeo.2009.06.001.

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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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Lyalina, L. M., I. L. Kamensky, and I. N. Tolstikhin. "Origin, sites and mobility of helium and argon isotopes in meliphanite." Доклады Академии наук 488, no. 3 (September 26, 2019): 303–6. http://dx.doi.org/10.31857/s0869-56524883303-306.

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The similarity of U-Th-4He age of meliphanite and the age of regional metamorphism (1800 Ma) seems to indicate a good retention of radiogenic 4He in the mineral, but contradicts with the experience of U-Th-4He dating. To analyze this result 3He concentration was measured, which appeared to be very low, about 2 % of the totally produced 3He. Radiogenic 3,4He isotopes occupier radiation tracks. Intersections of these tracks with cleavage planes provide migration of He atoms from the mineral and 4He, produced due to U and Th decay, should be almost completely lost. Instead, meliphanite contains trapped He occurring in specific cavities of the crystalline structure. Extraction of He isotopes from meliphanite by its step-wise heating in vacuum confirmed this conclusion. Using U-Th-4He system for dating (as it is often done in thermochronology) can lead to incorrect results. Both isotopes, 3He and 4He, should be used to identify the origin of helium in minerals.
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Landman, Rachel L., Rebecca M. Flowers, Nicholas A. Rosenau, and Jeremy Powell. "Conodont (U–Th)/He thermochronology: A case study from the Illinois Basin." Earth and Planetary Science Letters 456 (December 2016): 55–65. http://dx.doi.org/10.1016/j.epsl.2016.10.003.

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Evans, Noreen J., Brent I. A. McInnes, Andrew P. Squelch, Peter J. Austin, Bradley J. McDonald, and Quianhong Wu. "Application of X-ray micro-computed tomography in (U–Th)/He thermochronology." Chemical Geology 257, no. 1-2 (November 2008): 101–13. http://dx.doi.org/10.1016/j.chemgeo.2008.08.021.

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Mulch, A., S. A. Graham, P.W.Reiners, and C. P. Chamberlain. "Coupled hydrogen isotope paleoaltimetry and (U/Th)/He thermochronology of river deposits." Geochimica et Cosmochimica Acta 70, no. 18 (August 2006): A434. http://dx.doi.org/10.1016/j.gca.2006.06.872.

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Dissertations / Theses on the topic "(U-Th)/He thermochronology"

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Boyce, Jeremy Welles. "The development and application of microanalytical (U-Th)/He thermochronology." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/34662.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2006.
Includes bibliographical references.
The (U-Th)/He thermochronmeter is the foremost tool available to geoscientists for the purposes of constraining the thermal evolution of the crust below 250°C. However, the potential of the technique is far from fully explored. The existing de facto (U-Th)/He age standard, the fluorapatite of Cerro de Mercado (Durango, Mexico), does not yield reproducible dates, an observation confirmed at several laboratories. A series of experiments combining analytical and numerical techniques suggests that variations in U and Th measured in a single sectioned crystal could result in several percent apparent age variation due to unequal alpha recoil exchange across internal zone boundaries. Heterogeneities may also play a role in the variability observed in the diffusive behavior of He in strongly zoned minerals, such as monazite. He diffusion experiments on monazite indicate that the closure temperature for (U-Th)/He thermochronometry is between 206°C and 286°C, but varies from grain to grain, even within suites of crystals obtained from one rock. This may be due to compositional variations in the host monazite. Typically heterogeneous monazite crystals may have different closure temperatures, and single crystals may preserve large portions of the cooling history of a rock.
(cont.) None the less, monazite appears to have great potential for (U-Th)/He chronometry, and because of the high U and Th (and therefore 4He) concentrations observed in many monazites, it is a prime candidate for microanalytical (U-Th)/He. A microanalytical protocol for (U-Th)/He chronometry has been developed by applying the laser microprobe to polished crystals or crystal fragments of monazite. Agreement with conventional (U-Th)/He ages is to within -1.3%, with previously unavailable spatial resolution of -30pm. Large numbers of laser microprobe (U-Th)/He ages can be generated more rapidly than by conventional means, and this technique allows the dating of grains that would not be acceptable for conventional (U-Th)/He. Application of laser microprobe (U-Th)/He to monazites from Nanga Parbat, Pakistan, yields highly reproducible cooling ages within and between single crystals. Mean ages of 0.746 ± 0.049 Ma and 0.753 ± 0.036 Ma from two crystals, and the direct observation of negligible (U-Th)/He age gradients, support minimum mean cooling rates of > 325 K/m.y., and minimum mean rock uplift rates of > 4 km/m.y.. Laser microprobe (U-Th)/He of zircon produces no geologically useful dates, a consequence of the poor U and Th measurements provided by LA-ICPMS.
(cont.) Future efforts should employ better calibrated LA-ICPMS approaches or next-generation electron microprobe techniques, which can provide more accurate U and Th concentrations than LA-ICPMS, even for the low concentrations found in zircon.
by Jeremy Welles Boyce.
Ph.D.
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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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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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Webster, David Mark. "The fragment effect : an innovative new approach to apatite (U-Th)/He thermochronology." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/30777/.

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The uniquely low temperature sensitivity of the apatite (U-Th)/He system makes it an invaluable tool for studying shallow crustal processes which are not accessible through other techniques. Major advancements in both the theoretical and practical aspects of the technique have taken place over the past decade or so, however the routine application of the process is often held back by the perceived problem of single grain age ‘over dispersion’, particularly when applied to old, slowly cooled geological settings. There persists a misconception that age dispersion is indicative of a problem with the apatite (U-Th)/He system. A significant component of single grain age dispersion is inherent to the natural system, and therefore beneficial to reconstructing robust thermal histories. Variations in crystal grain size, accumulated amounts of radiation damage and changes to the helium concentration gradient within a grain due to fragmentation all contribute positively to age dispersion. Other, imposed factors such as crystal zoning and 4He implantation (which are undesirable) can also contribute to dispersion, however in the vast majority of cases their effects are negligible and only contribute noise to the inherent natural dispersion signal. The Ballachulish Igneous complex (BIC) in western Scotland has been used as a case study to demonstrate the range of age dispersion which should be expected when analysing large numbers of single grain aliquots per sample. Where 20+ grains are analysed, total dispersion will often be well in excess of 100% for old, slowly cooled samples, indeed dispersion in excess of 200% is possible. Such dispersion will often be as a consequence of outlying or apparently anomalous ages, however such ages should not be discounted unless there is sound analytical justification to do so. Apparent anomalous ages will often be ‘swallowed up’ by the data if more, or even different sized/shaped grains are analysed. Due to the competing effects of the three main causes of inherent natural dispersion, it should not be expected that large, well dispersed data sets will show any significant correlation between single grain age and either grain size or eU concentration. However a lack of correlation does not indicate poor quality data. Brown, Beucher and co-workers (Brown et al., 2013; Beucher et al., 2013) proposed a new modelling approach to account for the common occurrence of broken crystals in apatite separates, demonstrating that the additional inherent natural age dispersion arising from analysing fragments can be exploited when reconstructing thermal histories. A new inversion technique – HelFRAG was developed, based on a finite length cylinder diffusion model. The model is computationally demanding, therefore sampling based inversion methods requiring many forward model simulations become less practical. Consequently, an approximation of the finite cylinder diffusion model has been incorporated into the modelling software QTQt (Gallagher, 2012). Here, the approximation – QFrag has been demonstrated capable of returning comparable results to the full HelFRAG inversion technique when given the same synthetic data set, enabling the more routine application of the fragment model. Both QFrag and HelFRAG modelling techniques have been used to model the new BIC AHe dataset. The purpose is twofold: to demonstrate the importance of the fragment model with a real dataset, and to provide a new thermochronological interpretation for the BIC. When using this dataset, modelling samples individually shows only subtle differences (if any) between modelling broken grains correctly as fragments, verses modelling them incorrectly as whole grains. A far greater difference in the model output is seen when only modelling 3-6 grains compared to 20+, irrespective of whether fragments are treated correctly or not. When multiple samples are modelled together in a vertical profile, the fragment effect becomes much more important. A very different thermal history interpretation arises when any broken grains are modelled incorrectly as whole grains compared to when modelled as fragments. The new thermal history interpretation for the BIC involves a four stage cooling history from the time of intrusion (c. 424Ma). Very rapid cooling and uplift occurred immediately after intrusion over the first c. 20Myrs of the history (Phase 1). This brought the complex from c. 10km depths to within 2-3km of the surface. There followed much slower continued uplift between c. 404Ma and c. 300Ma, resulting in up to 1km of denudation (Phase 2). Over the next c. 150Myrs only a small volume of uplift occurred, however the geothermal gradient increased towards the end of this time period, suggesting crustal thinning (Phase 3). A final, rapid period of cooling and uplift occurred at c. 140Ma, bringing the top of the profile very near to the surface (Phase 4). No significant denudation has occurred since the end of this rapid uplift phase (10’s to 100’s of meters at most). The first two phases of cooling are interpreted as the final stages of the Caledonian orogeny, with erosion driven isostatic uplift causing continued denudation after the cessation of collisional tectonics. The end of phase three and the subsequent rapid uplift (Phase 4) are interpreted as the beginnings of crustal thinning and continental rifting which ultimately led to the opening of the North Atlantic Ocean.
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Guenthner, William R., Peter W. Reiners, Henrik Drake, and Mikael Tillberg. "Zircon, titanite, and apatite (U-Th)/He ages and age-eU correlations from the Fennoscandian Shield, southern Sweden." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/625521.

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Craton cores far from plate boundaries have traditionally been viewed as stable features that experience minimal vertical motion over 100-1000Ma time scales. Here we show that the Fennoscandian Shield in southeastern Sweden experienced several episodes of burial and exhumation from similar to 1800Ma to the present. Apatite, titanite, and zircon (U-Th)/He ages from surface samples and drill cores constrain the long-term, low-temperature history of the Laxemar region. Single grain titanite and zircon (U-Th)/He ages are negatively correlated (104-838Ma for zircon and 160-945Ma for titanite) with effective uranium (eU=U+0.235xTh), a measurement proportional to radiation damage. Apatite ages are 102-258Ma and are positively correlated with eU. These correlations are interpreted with damage-diffusivity models, and the modeled zircon He age-eU correlations constrain multiple episodes of heating and cooling from 1800Ma to the present, which we interpret in the context of foreland basin systems related to the Neoproterozoic Sveconorwegian and Paleozoic Caledonian orogens. Inverse time-temperature models constrain an average burial temperature of similar to 217 degrees C during the Sveconorwegian, achieved between 944Ma and 851Ma, and similar to 154 degrees C during the Caledonian, achieved between 366Ma and 224Ma. Subsequent cooling to near-surface temperatures in both cases could be related to long-term exhumation caused by either postorogenic collapse or mantle dynamics related to the final assembly of Rodinia and Pangaea. Our titanite He age-eU correlations cannot currently be interpreted in the same fashion; however, this study represents one of the first examples of a damage-diffusivity relationship in this system, which deserves further research attention.
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Moher, Meghan. "(U-Th)/He Thermochronology of the Aishihik Batholith, Central Yukon: Evidence for Stable Crust in the Cretaceous." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37347.

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The 190-180 Ma Aishihik batholith is located in southcentral Yukon in the North American Cordillera. Low-temperature (U-Th)/He thermochronology is used to assess the thermal history of the batholith and the surrounding host rock to provide an understanding of the Jurassic-Cretaceous tectonism. The Yukon Tanana terrane (YTT) shows a steady cooling of ~5°C/m.y from the Early Jurassic to the Late Cretaceous, when it reaches the surface. Sections of YTT adjacent to the batholith exhibits moderate cooling rates of 7°C/m.y from the Early to Late Jurassic and then slows down to 1.5°C/m.y until reaching the surface in the Late Cretaceous. The batholith itself exhibits relatively fast cooling from the Early to Late Jurassic (15°C/m.y) and then slows down (1.5°C/m.y) until it reaches surface conditions in the Late Cretaceous. All rocks are at the surface at the latest by the Late Cretaceous with no evidence that there were any subsequent substantial thermal events, which indicates that the Yukon has a mature landscape compared to the rest of the North American Cordillera.
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Peyton, Sara Lynn. "LOW-TEMPERATURE THERMOCHRONOLOGY OF THE LARAMIDE RANGES AND EASTWARD TRANSLATION OF SHORTENING IN THE SEVIER BELT, WYOMING, UTAH AND MONTANA." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194333.

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This dissertation contains two studies that investigate the Mesozoic and Cenozoic tectonics of the western USA. The first study investigates shortening in the Sevier thrust belt of northeast Utah and southwest Wyoming. Cross section restoration suggests that there was ∼8-14 km of pre-Absaroka-thrust shortening above the Jurassic Preuss salt detachment (PSD), but not below it, in the hanging wall of the Absaroka thrust. Reflection seismic data show that the Crawford thrust is not offset along the PSD, indicating that the additional shortening on the Absaroka plate was transferred east before main movement on the Crawford thrust. Integration of surface and subsurface geology suggests slip from the Willard or Lost Creek thrust was transferred several tens of kilometers east along the PSD between ∼102-90 Ma.The second study investigates the low-temperature thermochronology of the Laramide Ranges. We dated 91 borehole and surface samples from basement-cored uplifts of the Rocky Mountain foreland (Wind River, Beartooth, Bighorn and Laramie Ranges), and the Uncompahgre Uplift, using the apatite (U-Th)/He system. (U-Th)/He ages generally increase with increasing elevation. Most samples show age dispersion of tens to hundreds of Myr. Several samples show correlations between (U-Th)/He age and effective U concentration (eU = [U] + 0.235[Th]), indicating that radiation damage has affected (U-Th)/He age. Many surface and near-surface samples have (U-Th)/He ages that are older than apatite fission-track ages.Forward and inverse modeling using a radiation damage diffusion model showed that (U-Th)/He ages may be widely dispersed, and may be older than apatite fission-track ages within a fossil partial retention zone. Most samples, however, do not exhibit the predicted (U-Th)/He age-eU correlation. We show that the effects of grain size can obscure (U-Th)/He age-eU correlations. Best-fit thermal histories from the inversion of age-eU pairs were extrapolated to other elevations to create model age-elevation plots. "Too-old" (U-Th)/He ages that are not within a fossil partial retention zone are likely due to He implantation from high-eU phases. Inverse modeling of (U-Th)/He age data suggests that rapid exhumation within the Laramide province began earlier in the Bighorn Mountains (before ∼71 Ma) than the Beartooth Range (before ∼58 Ma).
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Hansman, Reuben J., Uwe Ring, Stuart N. Thomson, Brok Bas den, and Konstanze Stübner. "Late Eocene Uplift of the Al Hajar Mountains, Oman, Supported by Stratigraphy and Low-Temperature Thermochronology." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/627072.

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Uplift of the Al Hajar Mountains in Oman has been related to either Late Cretaceous ophiolite obduction or the Neogene Zagros collision. To test these hypotheses, the cooling of the central Al Hajar Mountains is constrained by 10 apatite (U-Th)/He (AHe), 15 fission track (AFT), and four zircon (U-Th)/He (ZHe) sample ages. These data show differential cooling between the two major structural culminations of the mountains. In the 3km high Jabal Akhdar culmination AHe single-grain ages range between 392 Ma and 101 Ma (2 sigma errors), AFT ages range from 518 Ma to 324 Ma, and ZHe single-grain ages range from 62 +/- 3Ma to 39 +/- 2 Ma. In the 2 km high Saih Hatat culmination AHe ages range from 26 +/- 4 to 12 +/- 4 Ma, AFT ages from 73 +/- 19Ma to 57 +/- 8 Ma, and ZHe single-grain ages from 81 +/- 4 Ma to 58 +/- 3 Ma. Thermal modeling demonstrates that cooling associated with uplift and erosion initiated at 40 Ma, indicating that uplift occurred 30 Myr after ophiolite obduction and at least 10 Myr before the Zagros collision. Therefore, this uplift cannot be related to either event. We propose that crustal thickening supporting the topography of the Al Hajar Mountains was caused by a slowdown of Makran subduction and that north Oman took up the residual fraction of N-S convergence between Arabia and Eurasia.
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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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Powell, Jeremy. "Burial and Exhumation History of the Mackenzie Mountains and Plain, NWT, Through Integration of Low-Temperature Thermochronometers." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35994.

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The integration of low-temperature thermochronometers, including apatite and zircon (U-Th)/He (AHe, ZHe) and apatite fission-track (AFT) methods, allows for a quantification of the thermal history experienced by rocks as they heat and cool through upper crustal temperature regimes (<200°C). Whereas these methods are practical in geologic terranes that have undergone rapid cooling, application to strata with protracted cooling histories is complicated by the enhanced role of grain-specific parameters (volume, chemistry, radiation damage) on the kinetics of helium diffusion and fission track annealing. The effects of these variables are most prevalent in sedimentary samples, where natural variance in detrital accessory mineral populations results in a broad range of diffusion kinetics and great dispersion in corresponding cooling dates. This thesis integrates contemporary thermochronometer diffusion and annealing kinetics to investigate the burial and exhumation history of two natural laboratories. In the Mackenzie Mountains and Plain of the Northwest Territories, long-term radiation damage accumulation in zircon from Neoproterozoic siliciclastic units produces ZHe dates that track Albian to Paleocene burial and exhumation in front of the foreland-propagating fold-thrust belt. For the Phanerozoic stratigraphic section, AFT annealing kinetics are calculated from Devonian and Cretaceous samples, and are incorporated into multi-kinetic AFT modeling. These kinetics also constrain AHe date-radiation damage trends, and when combined allow for an estimation on the magnitude of eroded sediment across regional pre-Albian and post-Paleocene unconformities. Finally, conodont (U-Th)/He data from Anticosti Island, Québec in the Gulf of the St. Lawrence are compared with ZHe, AHe and AFT data to test their utility as a thermochronometer for carbonate basin analysis. These data evince a Mesozoic thermal history previously unattributed to the region. Ultimately, this thesis provides a novel assessment on the ways in which thermochronometer date dispersion can be quantified to assess the thermal evolution of sedimentary basins from burial through to inversion.
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Book chapters on the topic "(U-Th)/He thermochronology"

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Reiners, Peter W. "6. Zircon (U-Th)/He Thermochronometry." In Low-Temperature Thermochronology:, edited by Peter W. Reiners and Todd A. Ehlers, 151–80. Berlin, Boston: De Gruyter, 2005. http://dx.doi.org/10.1515/9781501509575-008.

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Dunai, Tibor J. "10. Forward Modeling and Interpretation of (U-Th)/He Ages." In Low-Temperature Thermochronology:, edited by Peter W. Reiners and Todd A. Ehlers, 259–74. Berlin, Boston: De Gruyter, 2005. http://dx.doi.org/10.1515/9781501509575-012.

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Danišík, Martin, Milan Kohút, István Dunkl, L’ubomír Hraško, and Wolfgang Frisch. "Apatite fission track and (U-Th)/He thermochronology of the Rochovce granite (Slovakia) — implications for the thermal evolution of the Western Carpathian-Pannonian region." In Orogenic Processes in the Alpine Collision Zone, S225—S233. Basel: Birkhäuser Basel, 2008. http://dx.doi.org/10.1007/978-3-7643-9950-4_13.

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"The (U-Th)/He system." In Geochronology and Thermochronology, 291–363. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118455876.ch11.

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Barnes, Christopher J., and David A. Schneider. "Late Cretaceous−Paleogene burial and exhumation history of the Southwestern Basement Province, Svalbard, revealed by zircon (U-Th)/He thermochronology." In Circum-Arctic Structural Events: Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens. Geological Society of America, 2019. http://dx.doi.org/10.1130/2018.2541(07).

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Conference papers on the topic "(U-Th)/He thermochronology"

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Cooperdock, Emily, Daniel F. Stockli, Peter Kelemen, and Juan Carlos De Obeso. "TRACKING MAGNETITE GROWTH DURING FLUID ROCK INTERACTIONS WITH (U-TH)/HE THERMOCHRONOLOGY." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-356045.

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Niemi, Nathan A., and Kendra E. Murray. "RAPID STEPPED-HEATING EXPERIMENTAL METHOD FOR ROUTINE MONAZITE (U-TH-SM)/HE THERMOCHRONOLOGY." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-323478.

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Metcalf, James R., Jaclyn S. Baughman, and Rebecca M. Flowers. "EVALUATING A NEW, RAPID ZIRCON AND TITANITE DISSOLUTION METHOD FOR (U-TH)/HE THERMOCHRONOLOGY." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-280412.

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Saga, Mary Rose, Luke Basler, Jacky Baughman, and Michelle Fame. "MID-CRETACEOUS EXHUMATION OF THE NORTHERN APPALACHIAN MOUNTAINS, VERMONT, FROM APATITE (U-TH)/HE THERMOCHRONOLOGY." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-356171.

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Basler, Luke, Jacky Baughman, Michelle Fame, and Peter Haproff. "SPATIALLY VARIABLE ALLEGHANIAN EXHUMATION OF THE CENTRAL APPALACHIAN MOUNTAINS FROM ZIRCON (U-TH)/HE THERMOCHRONOLOGY." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-359043.

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DeSilva, Cameron, Jenna M. Kaempfer, and William R. Guenthner. "DECIPHERING ZIRCON (U-TH)/HE THERMOCHRONOLOGY DATA SCATTER IN ARCHEAN GRAINS FROM THE BEARTOOTH RANGE, MONTANA." In 54th Annual GSA North-Central Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020nc-348304.

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Rahl, Jeffrey M., Tyson Michael Smith, Joel Saylor, Julie C. Fosdick, and Adam S. Goldsmith. "PALEOZOIC BURIAL AND EXHUMATION OF THE AMARILLO-WICHITA UPLIFT: INSIGHTS FROM ZIRCON (U-TH)/HE THERMOCHRONOLOGY." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-338410.

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Daigle, Lane W., Benjamin W. Johnson, James R. Metcalf, and Rebecca M. Flowers. "(U-TH)/HE THERMOCHRONOLOGY CONSTRAINTS ON THE PHANEROZOIC EXHUMATION HISTORY OF THE EASTERN PILBARA CRATON, AUSTRALIA." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-337215.

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Huff, Dante E., Elizabeth Holley, and William R. Guenthner. "CONSTRAINING THE TIMING OF HYDROTHERMAL FLUID FLOW AT THE MARIGOLD DEPOSIT, NEVADA USING (U-TH)/HE THERMOCHRONOLOGY." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-278909.

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Niemi, Nathan A., and Marin K. Clark. "RAPID PLIOCENE EXHUMATION OF THE SANTA MONICA MOUNTAINS, CALIFORNIA, FROM APATITE AND ZIRCON (U-TH)/HE THERMOCHRONOLOGY." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-287829.

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