Relevant bibliographies by topics / K-Ar and 40Ar/39Ar geochronology

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'K-Ar and 40Ar/39Ar geochronology'

Author: Grafiati
Published: 7 July 2024
Last updated: 31 July 2025

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Journal articles on the topic "K-Ar and 40Ar/39Ar geochronology"

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Renne, Paul R. "Progress and Challenges in K-Ar and40Ar/39Ar Geochronology." Paleontological Society Papers 12 (October 2006): 47–66. http://dx.doi.org/10.1017/s1089332600001340.

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K-Ar and more recently the40Ar/39Ar variant are well established dating methods. The40Ar/39Ar method requires irradiation with neutrons, posing some complications that are greatly outweighed by the benefits. The40Ar/39Ar method is particularly powerful due to the availability of internal reliability criteria, the ability to analyze single crystals, and the amenability of the analyses to automation.40Ar/39Ar dating has the capability for unsurpassed precision and is applicable to the broadest range of geologic environments and time scales of any radioisotope dating technique. For chronostratigr
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Carter, Jack, Ryan B. Ickert, Darren F. Mark, Marissa M. Tremblay, Alan J. Cresswell, and David C. W. Sanderson. "Production of <sup>40</sup>Ar by an overlooked mode of <sup>40</sup>K decay with implications for K-Ar geochronology." Geochronology 2, no. 2 (2020): 355–65. http://dx.doi.org/10.5194/gchron-2-355-2020.

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Abstract. The decay of 40K to the stable isotopes 40Ca and 40Ar is used as a measure of time for both the K-Ca and K-Ar geochronometers, the latter of which is most generally utilized by the variant 40Ar∕39Ar system. The increasing precision of geochronology has forced practitioners to deal with the systematic uncertainties rooted in all radioisotope dating methods. A major component of these systematic uncertainties for the K-Ar and 40Ar∕39Ar techniques is imprecisely determined decay constants and an incomplete knowledge of the decay scheme of 40K. Recent geochronology studies question wheth
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Lentz, Carlin, Kathleen Thorne, Christopher R. M. McFarlane, and Douglas A. Archibald. "U-Pb, Ar-Ar, and Re-Os Geochronological Constraints on Multiple Magmatic–Hydrothermal Episodes at the Lake George Mine, Central New Brunswick." Minerals 10, no. 6 (2020): 566. http://dx.doi.org/10.3390/min10060566.

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The Lake George antimony mine was at one time North America’s largest producer of antimony. Despite being widely known for the antimony mineralization, the deposit also hosts a range of styles of mineralization such as multiple generations of W-Mo bearing quartz veins as well as a system of As-Au bearing quartz–carbonate veins. In situ U-Pb zircon geochronology, using LA ICP-MS, of the Lake George granodiorite yielded a weighted mean 206Pb/238U age of 419.6 ± 3.0 Ma. Step heating of phlogopite separated from the lamprophyre dykes produced a 40Ar/39Ar plateau segment date of 419.4 ± 1.4 Ma. Sin
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Okwueze, Odinaka, Kevin Konrad, and Tomas Capaldi. "New developments in incremental heating detrital 40Ar∕39Ar lithic (DARL) geochronology using Icelandic river sand." Geochronology 6, no. 4 (2024): 683–96. https://doi.org/10.5194/gchron-6-683-2024.

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Abstract. Iceland records over 15 million years of complex volcanism resulting from the intersection of a mid-ocean ridge and mantle plume upwelling. The Iceland mantle plume has been active for at least 70 Myr, with surface expressions in Greenland, the North Atlantic, and Iceland. The Iceland hotspot may exhibit periods of increased volcanic output linked to pulses of upwelling within the plume. Understanding Iceland's magmatic history and potential pulsation could provide key insights into dynamic topography driving changes in deep-water oceanic circulation, late Cenozoic climate change, an
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MacIntyre, D. G., and M. E. Villeneuve. "Geochronology of mid-Cretaceous to Eocene magmatism, Babine porphyry copper district, central British Columbia." Canadian Journal of Earth Sciences 38, no. 4 (2001): 639–55. http://dx.doi.org/10.1139/e00-107.

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New U/Pb and 40Ar/39Ar isotopic dating in the Babine porphyry copper district of central British Columbia documents three distinct magmatic events at 107–104, 85–78, and 54–50 Ma. The earliest event involved emplacement of rhyolite domes into submarine volcanic rocks of the Rocky Ridge Formation. The rhyolite domes and related dacitic to basaltic volcanic rocks gave a U–Pb age of 107.9 ± 0.2 Ma and an 40Ar/39Ar age of 104.8 ± 1.2 Ma. The rhyolites, which were previously mapped as Eocene, are reinterpreted to be part of a previously unrecognized mid-Cretaceous cauldron subsidence complex. The r
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Reid, Anthony, Marnie Forster, Wolfgang Preiss, et al. "Complex 40Ar ∕ 39Ar age spectra from low-grade metamorphic rocks: resolving the input of detrital and metamorphic components in a case study from the Delamerian Orogen." Geochronology 4, no. 2 (2022): 471–500. http://dx.doi.org/10.5194/gchron-4-471-2022.

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Abstract. In this study, we provide 40Ar / 39Ar geochronology data from a suite of variably deformed rocks from a region of low-grade metamorphism within the Cambro–Ordovician Delamerian Orogen, South Australia. Low-grade metamorphic rocks such as these can contain both detrital minerals and minerals newly grown or partly recrystallised during diagenesis and metamorphism. Hence, they typically yield complex 40Ar / 39Ar age spectra that can be difficult to interpret. Therefore, we have undertaken furnace step heating 40Ar / 39Ar geochronology to obtain age spectra with many steps to allow for a
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Hart, Craig JR, and Mike Villeneuve. "Geochronology of Neogene alkaline volcanic rocks (Miles Canyon basalt), southern Yukon Territory, Canada: the relative effectiveness of laser 40Ar/39Ar and K-Ar geochronology." Canadian Journal of Earth Sciences 36, no. 9 (1999): 1495–507. http://dx.doi.org/10.1139/e99-049.

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Miles Canyon basalt is an informal term used to describe numerous exposures of young alkaline olivine basalt flows in southern Yukon. The volcanic rocks are part of the Northern Cordilleran volcanic province. K-Ar and Ar-Ar whole-rock dates indicate that the Miles Canyon succession of flows at the Whitehorse Rapids are clearly Late Miocene in age (ca. 8.4 Ma). The largest exposure of the Miles Canyon basalt occurs at the Alligator Lake volcanic complex where two nearly concordant Pliocene Ar-Ar dates indicate eruption at ca. 3.2 Ma. K-Ar analyses from other sites yield dates of 2.4 and 7.1 Ma
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VASCONCELOS, PAULO M., ARTUR T. ONOE, KOJI KAWASHITA, ADALBERTO J. SOARES, and WILSON TEIXEIRA. "40Ar/39Ar geochronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration." Anais da Academia Brasileira de Ciências 74, no. 2 (2002): 297–342. http://dx.doi.org/10.1590/s0001-37652002000200008.

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Laser heating 40Ar/39Ar geochronology provides high analytical precision and accuracy, mum-scale spatial resolution, and statistically significant data sets for the study of geological and planetary processes. A newly commissioned 40Ar/39Ar laboratory at CPGeo/USP, São Paulo, Brazil, equips the Brazilian scientific community with a new powerful tool applicable to the study of geological and cosmochemical processes. Detailed information about laboratory layout, environmental conditions, and instrumentation provides the necessary parameters for the evaluation of the CPGeo/USP 40Ar/39Ar suitabili
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Wu, Meng, Liang Li, Jing-gui Sun, and Rui Yang. "Geology, geochemistry, and geochronology of the Laozuoshan gold deposit, Heilongjiang Province, Northeast China: implications for multiple gold mineralization events and geodynamic setting." Canadian Journal of Earth Sciences 55, no. 6 (2018): 604–19. http://dx.doi.org/10.1139/cjes-2018-0038.

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The Laozuoshan gold deposit, located in the central part of the Jiamusi Massif, is hosted by the contact zone between granitic complex and Proterzoic strata. In this study, we present the results of geochronology and geochemistry of ore-related granodiorite and diorite porphyry, and hydrothermal sericite 40Ar/39Ar dating. The granodiorite and diorite porphyry in the Laozuoshan gold deposit are calc-alkaline and high-K (calc-alkaline) series, which are enriched in LREE and LILE and depleted in HFSE, with no depletion of Eu. The geochronology data show that zircon U–Pb ages of the granodiorite a
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Radhakrishna, T., H. Maluski, J. G. Mitchell, and M. Joseph. "40Ar/39Ar and K/Ar geochronology of the dykes from the south Indian granulite terrain." Tectonophysics 304, no. 1-2 (1999): 109–29. http://dx.doi.org/10.1016/s0040-1951(98)00288-1.

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Dissertations / Theses on the topic "K-Ar and 40Ar/39Ar geochronology"

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Gaylor, Jonathan. "40Ar/39Ar Dating of the Late Cretaceous." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-01017165.

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As part of the wider European GTS Next project, I propose new constraints on the ages of the Late Cretaceous, derived from a multitude of geochronological techniques, and successful stratigraphic interpretations from Canada and Japan. In the Western Canada Sedimentary Basin, we propose a new constraint on the age of the K/Pg boundary in the Red Deer River section (Alberta, Canada). We were able to cyclostratigraphically tune sediments in a non-marine, fluvial environment utilising high-resolution proxy records suggesting a 11-12 precession related cyclicity. Assuming the 40Ar/39Ar method is in
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Caswell, Brandon Christopher. "⁴⁰AR/³⁹AR geochronology of biotite from ductile shear zones of the Ellesmere-Devon crystalline terrane, Nunavut, Canadian Arctic." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6070.

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This thesis presents a 40Ar/39Ar geochronological analyses of biotite from thin ductile shear zones in Paleoproterozoic granulite-facies gneisses from the Ellesmere-Devon crystalline terrane, Nunavut, Canada. The gneisses are part of the Paleoproterozoic Thelon tectonic zone. U-Pb dates of zircon show that the gneisses have magmatic protolith ages ranging from 2007–1958 Ma. The quartzofeldspathic gneisses in southeast Ellesmere Island display centimeter-scale E- to NE-striking sinistral and dextral mylonite zones offsetting pegmatitic dikes that are the last stage of ductile deformation of the
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Hevia, Cruz Francisco. "Climatic and landscape evolution of the Azores over the past million years." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASJ035.

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L'évolution des îles volcaniques résulte d'interactions complexes entre croissance des volcans et processus de destruction (éruptions explosives, glissements de terrain, érosion fluviale, altération). Les changements climatiques peuvent influencer ces processus sur des échelles variées. A l’échelle événementielle, des précipitations intenses peuvent engendrer des épisodes érosifs extrêmes. Sur le long-terme, des variations des taux d'altération, sensibles aux précipitations et à la température, peuvent impacter la fertilité des sols et le cycle global du carbone.Les îles volcaniques des Açores
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Most, Thomas. "Geodynamic evolution of the Eastern Pelagonian zone in north-western Greece and the Republic of Macedonia implications from U/Pb, Rb/Sr, K/Ar, 40Ar/39Ar geochronology and fission track thermochronology /." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=96650268X.

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Pourteau, Amaury. "Closure of the Neotethys Ocean in Anatolia : structural, petrologic and geochronologic insights from low-grade high-pressure metasediments, Afyon Zone." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2012/5780/.

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The complete consumption of the oceanic domain of a tectonic plate by subduction into the upper mantle results in continent subduction, although continental crust is typically of lower density than the upper mantle. Thus, the sites of former oceanic domains (named suture zones) are generally decorated with stratigraphic sequences deposited along continental passive margins that were metamorphosed under low-grade, high-pressure conditions, i.e., low temperature/depth ratios (< 15°C/km) with respect to geothermal gradients in tectonically stable regions. Throughout the Mesozoic and Cenozoic (i.
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Coulié, Emmanuel. "Chronologie 40Ar/39Ar et K/Ar de la dislocation du plateau éthiopien et de la déchirure continentale à la corne de l'Afrique depuis 30 Ma." Paris 11, 2001. http://www.theses.fr/2001PA112284.

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Ce travail de thèse présente le développement et la mise au point d'un procédé original pour la datation par la technique 40_Ar/39_Ar. Le cœur de ce système, un spectromètre de masse utilisant la collection simultanée des cinq isotopes de l'argon, est aujourd'hui unique à l'échelle internationale. Tout d'abord testé et validé sur des échantillons géologiques standard, ce système a permis de réaliser, dans sa configuration actuelle, des analyses de grande qualité sur les roches volcaniques de l'Ethiopie, avec une reproductibilité analytique de l'ordre de 0. 2%. Il est maintenant communément adm
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Favier, Alexiane. "Évolution spatio-temporelle de l'hydrothermalisme dans la plaque supérieure de l'arc des Petites Antilles en Guadeloupe : applications aux systèmes géothermaux." Thesis, Antilles, 2019. http://www.theses.fr/2019ANTI0401.

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Pour poursuivre le développement de la géothermie de haute-enthalpie dans l’arc insulaire des Petites Antilles il faut d’une part identifier de nouvelles zones potentielles et d’autre part mieux comprendre le fonctionnement des réservoirs géothermaux. Dans ce cadre, l’objectif de cette thèse est de caractériser l’évolution spatio-temporelle de l’hydrothermalisme au niveau de la plaque supérieure de l’arc en Guadeloupe au travers d’une analyse pluridisciplinaire (études structurales, géochimiques, minéralogiques, pétrologiques et géochronologiques) des complexes volcaniques les plus anciens de
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Most, Thomas [Verfasser]. "Geodynamic evolution of the Eastern Pelagonian zone in north-western Greece and the Republic of Macedonia : implications from U/Pb, Rb/Sr, K/Ar, 40Ar/39Ar geochronology and fission track thermochronology / vorgelegt von Thomas Most." 2003. http://d-nb.info/96650268X/34.

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Book chapters on the topic "K-Ar and 40Ar/39Ar geochronology"

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Morgan, Leah E. "40Ar/39Ar and K–Ar Geochronology." In Encyclopedia of Geoarchaeology. Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-1-4020-4409-0_45.

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Morgan, Leah E. "40Ar/39Ar and K–Ar Geochronology." In Encyclopedia of Geoarchaeology. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-44600-0_45-1.

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Scaillet, Stéphane. "K-Ar (40Ar/39Ar) Geochronology of Ultrahigh Pressure Rocks." In When Continents Collide: Geodynamics and Geochemistry of Ultrahigh-Pressure Rocks. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9050-1_7.

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Wijbrans, Jan R. "Metamorphic Terranes (K–Ar/40Ar/39Ar)." In Encyclopedia of Scientific Dating Methods. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6326-5_44-1.

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Wijbrans, Jan R. "Metamorphic Terranes (K–Ar/40Ar/39Ar)." In Encyclopedia of Marine Geosciences. Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6304-3_44.

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Renne, Paul R. "K-Ar and 40Ar/39Ar Dating." In AGU Reference Shelf. American Geophysical Union, 2013. http://dx.doi.org/10.1029/rf004p0077.

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McDougall, Ian. "Volcanogenic Sedimentary Rocks (K/Ar, 40Ar/39Ar)." In Encyclopedia of Scientific Dating Methods. Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6304-3_265.

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Dallmeyer, R. D., A. Reuter, N. Clauer, and N. Liewig. "Chronology of Caledonian tectonothermal activity within the Gaissa and Laksefjord Nappe Complexes (Lower Allochthon), Finnmark, Norway: Evidence from K—Ar and 40Ar/39Ar ages." In The Caledonide Geology of Scandinavia. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2549-6_2.

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McDougall, Ian, and T. Mark Harrison. "Basis of the 40Ar/39Ar Dating Method." In Geochronology and Theromochronology By The 40 Ar/39 Ar Method. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195109207.003.0002.

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Abstract The 40Ar/39 Ar method of dating rocks has its foundations in the potassium-argon (K/Ar) isotopic dating method, a widely used technique for measuring numerical ages on minerals and rocks. Since the K/Ar method was developed more than 40 years ago, it has been applied to a diverse range of geological samples to help elucidate many important geological problems of local, regional, or global significance. Particularly notable successes, dependent largely upon dating by the K/Ar method, include the development of the geomagnetic polarity time scale and the numerical calibration of the Pha
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McDougall, Ian, and T. Mark Harrison. "40 Ar/39Ar Data Presentation and Interpretation." In Geochronology and Theromochronology By The 40 Ar/39 Ar Method. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195109207.003.0004.

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Abstract Up to this point, our focus has largely been on describing the materials that are appropriate for 40 Ar/39Ar dating and presenting the technical details required to produce reliable isotope ratio measurements. In this and subsequent chapters, we discuss the methods used to interpret 40Ar/ 39 Ar data in terms of geologic history. Depending upon the physical environment, 40 Ar/39Ar dates may be interpreted as rock forming ages or in terms of thermal closure to argon loss. In certain cases, interpretation of results using these models is quite straightforward, but in others, analysis art
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Conference papers on the topic "K-Ar and 40Ar/39Ar geochronology"

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Mercer, C. M., and K. V. Hodges. "ARAR — SOFTWARE TO ACCOUNT FOR DISCREPANCIES BETWEEN K/AR AND 40AR/39AR DATASETS PUBLISHED WITH DIFFERENT DECAY, ISOTOPIC, AND MONITOR-AGE PARAMETERS." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-286929.

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Reports on the topic "K-Ar and 40Ar/39Ar geochronology"

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Hunt, P. A., and J. C. Roddick. A compilation of K-Ar and 40Ar-39Ar ages: Report 23. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/193342.

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Hunt, P. A., and J. C. Roddick. A compilation of K-Ar and 40Ar-39Ar ages: Report 24. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1994. http://dx.doi.org/10.4095/195178.

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Hunt, P. A., and J. C. Roddick. A compilation of 40Ar-39Ar and K-Ar ages: Report 25. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207763.

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Kellett, D., S. Pehrsson, D. Skipton, et al. Thermochronological history of the northern Canadian Shield: a synthesis. Natural Resources Canada/CMSS/Information Management, 2024. http://dx.doi.org/10.4095/332507.

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This contribution examines the current state of knowledge regarding the postmetamorphic cooling of most Archean to Paleoproterozoic tectonic elements of the northern Canadian Shield. This was achieved by building an extensive data set of over 2000 combined K-Ar and 40Ar/39Ar cooling ages. The Churchill Province (amalgamated Rae and Hearne cratons) shows a general west to east cooling pattern illustrated by two large-scale thermochronological profiles.
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Age of tephra beds at the Ocean Point dinosaur locality, North Slope, Alaska, based on K-Ar and 40Ar/39Ar analyses. US Geological Survey, 1992. http://dx.doi.org/10.3133/b1990c.

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