Results 191 to 200 of about 29,640 (237)

Volcanic forcing of the Lomagundi-Jatuli carbon isotope excursion. [PDF]

Proc Natl Acad Sci U S A
Blichert-Toft J, Konhauser K, Coutret B, Pinto M, Agranier A, El Albani A, Albarède F.   +6 more
europepmc   +1 more source

A billion-year shift in the formation of Earth's largest ore deposits. [PDF]

Proc Natl Acad Sci U S A
Courtney-Davies L, Fiorentini M, Dalstra H, Hagemann S, Ramanaidou E, Danišik M, Evans NJ, Rankenburg K, McInnes BIA.   +8 more
europepmc   +1 more source

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Detrital Zircon U-Pb Geochronology Applied to Tectonics

Annual Review of Earth and Planetary Sciences, 2014
Detrital zircon geochronology is rapidly developing into an essential tool in Earth science research because of the widespread occurrence of zircon in sedimentary systems; the wide range of information that can be extracted from zircon crystals; the ability to determine ages with reasonable precision, accuracy, and efficiency; and the wide range of ...
George Gehrels
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U–Pb ID-TIMS geochronology using ATONA amplifiers

Journal of Analytical Atomic Spectrometry, 2020
New low noise, large dynamic range amplifiers applied to Faraday measurements of small loads of Pb and U for geochronology.
Dawid Szymanowski, Blair Schoene
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U–Pb geochronology of speleothems by MC-ICPMS

Quaternary Geochronology, 2006
Abstract Building upon the work of Richards et al. [1998. U–Pb dating of a speleothem of Quaternary age. Geochimica et Cosmochimica Acta 62, 3683–3688], we have developed a method for precise dating of speleothems beyond the range of the U–Th technique using the U–Pb decay scheme.
WOODHEAD J, HELLSTROM J, MAAS R, DRYSDALE R, ZANCHETTA, GIOVANNI, DEVINE P, TAYLOR E.   +6 more
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U-Pb geochronology of grossular-andradite garnet

Chemical Geology, 2017
Abstract This study presents a new laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) based U-Pb geochronometric method for dating grossular-andradite (grandite) garnet. Grandite is a primary skarn mineral, therefore dating its growth directly dates hydrothermal activity.
S. Seman, D.F. Stockli, N.M. McLean
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Bastnaesite: a promising U-Pb geochronological tool

Doklady Earth Sciences, 2010
One of the most complex problems in geochrono logical studies is dating endogenous ore processes. The application of the U–Pb method in solving this prob lem is constrained by the sufficiently narrow range of traditional mineral geochronometers, which, if present in ores, are strongly altered.
E. B. Sal’nikova, S. Z. Yakovleva, A. V. Nikiforov, A. B. Kotov, V. V. Yarmolyuk, I. V. Anisimova, A. M. Sugorakova, Yu. V. Plotkina   +7 more
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UPb geochronology of the Sri Lankan basement

Precambrian Research, 1994
Abstract UPb ages of zircons and monazites from ortho- and paragneisses representing the major crystalline basement units of Sri Lanka establish a new geochronological framework, which is consistent with previously published work on SmNd model ages, RbSr whole-rock ages, and UPb mineral ages.
S. Hölzl, A.W. Hofmann, W. Todt, H. Köhler   +3 more
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Synthesis and purification of 205Pb for UPb geochronology

Chemical Geology: Isotope Geoscience section, 1987
Abstract 205Pb is a synthetic isotope of great utility in UPb geochronology, but it has never been widely available in a purified, useable form. We have successfully completed two production runs with a total yield of ∼100μg 205Pb. The isotope was produced by 24–27-MeV proton irradiation using cyclotron facilities of Atomic Energy of Canada Limited
Randall R. Parrish, Tom E. Krogh
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U–Pb geochronology: its development and importance in Canada

Canadian Journal of Earth Sciences, 2023
This article presents a history of the development of U–Pb geochronology with emphasis on the role of Canadian researchers and some of its applications to Canadian geology. Modern U–Pb dating is the result of work by many individuals over the past 60 years, but the most important was Tom Krogh, who established methods that allowed determination of ...
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