Výsledky vyhledávání - "Ajoy K. Baksi"

Paraná flood basalt volcanism primarily limited to ~ 1 Myr beginning at 135 Ma: New 40 Ar/ 39 Ar ages for rocks from Rio Grande do Sul, and critical evaluation of published radiometric data

Autor: Ajoy K. Baksi

Publikováno v: Journal of Volcanology and Geothermal Research. 355:66-77

40 Ar/ 39 Ar step heating analyses were carried out on seven rocks (five basalts, an andesite and a rhyolite) from the southern Parana Province (~ 28°S–30°S); they yield plateau/isochron ages of 135–134 Ma, in good agreement with published step

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::611c6af77a9ae8539e22dfd3c9a9aa61
https://doi.org/10.1016/j.jvolgeores.2017.02.016

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40Ar/39Ar ages of flood basalt provinces in Russia and China and their possible link to global faunal extinction events: A cautionary tale regarding alteration and loss of 40Ar∗

Autor: Ajoy K. Baksi

Publikováno v: Journal of Asian Earth Sciences. 84:118-130

The hypothesis that the Permo–Triassic boundary (PTB) mass extinctions were caused by flood basalt volcanism in Russia (Siberian Traps) and/or China (the Emeishan Traps) is investigated from the point of view of time of occurrence ( 40 Ar/ 39 Ar ag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::efffed87f695a466fd5cb617e3effaee
https://doi.org/10.1016/j.jseaes.2013.07.029

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The Deccan Trap – Cretaceous–Paleogene boundary connection; new 40Ar/39Ar ages and critical assessment of existing argon data pertinent to this hypothesis

Autor: Ajoy K. Baksi

Publikováno v: Journal of Asian Earth Sciences. 84:9-23

The Cretaceous–Paleogene boundary (KPgB) was dated by the 40Ar/39Ar method herein from the western interior of North America at 65.48 ± 0.12 Ma (1σ), in good agreement with other recent published estimates. For the Deccan Traps, India, new argon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d6c413aa269c5678af000efffc7b61e3
https://doi.org/10.1016/j.jseaes.2013.08.021

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CRITICAL EVALUATION OF LAVA EXTRUSION RATES IN THE DECCAN TRAPS, INDIA, AND THE CHIXCULUB IMPACT EVENT

Autor: Ajoy K. Baksi

Publikováno v: Geological Society of America Abstracts with Programs.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8eb3244af52849f5cecf57cb894df986
https://doi.org/10.1130/abs/2016sc-273666

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'New 40Ar/39Ar dating of the Grande Ronde lavas, Columbia River Basalts, USA: Implications for duration of flood basalt eruption episodes' by – Discussion

Autor: Ajoy K. Baksi

Publikováno v: Lithos. :293-299

Barry et al. (2010) presented 40 Ar/ 39 Ar ages to argue for a very limited duration (~ 0.4 m.y.) for the eruption of the Grande Ronde lavas. Critical examination of their data sets shows (1) a number of their plateau ages are statistically invalid a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::69d641b13583f738ac0fc33a3ed2ef99
https://doi.org/10.1016/j.lithos.2011.11.026

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Comment to 'Distribution and geochronology of the Oregon Plateau (U.S.A.) flood basalt volcanism: The Steens Basalt Revisited' by M.E. Brueseke et al. [J. Volcanol. Geotherm. Res. 161 (2007), 187–214]

Autor: Ajoy K. Baksi

Publikováno v: Journal of Volcanology and Geothermal Research. 196:134-138

The 40 Ar/ 39 Ar stepheating results of Brueseke et al. (2007) are critically evaluated, firstly for possible alteration of the samples dated. Steps passing the alteration index test (Baksi, 2007a) can then be used to derive plateau ages, which must

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dce14953c54945435405ed7a4e6cf5d4
https://doi.org/10.1016/j.jvolgeores.2010.04.007

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Comment on '40Ar/39Ar dating of the Rajahmundry Traps, eastern India and their relationship to the Deccan Traps' by Knight et al. [Earth Planet Sci. Lett. 208 (2003) 85–99]

Autor: Ajoy K. Baksi

Publikováno v: Earth and Planetary Science Letters. 239:368-373

Knight et al. presented age and chemical data on two (sets of) lava flows from the Rajahmundry area, on either bank of the Godavari River. The age and petrogenesis of these flows and their possible link to sections of the main Deccan Province are of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41800b2cf489b20cbaa4e57e2a1768f1
https://doi.org/10.1016/j.epsl.2005.03.029

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