Results 21 to 30 of about 69,082 (309)
Solid Earth Sciences, 2021 The Tengshan'ao Sn deposit, located at the Dayishan ore field, Nanling Range, is one of the recently explored deposits in this region. In this study, LA-MC-ICP-MS cassiterite U–Pb and muscovite 40Ar-39Ar isotopic dating analyses for altered granite-type ...
Zunzun Zhang +9 more
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Direct dating of mid-crustal shear zones with synkinematic allanite:new in situ U-Th-Pb geochronological approaches applied to the Mont Blanc massif [PDF]
, 2013 International audienceDating the timing of motion on crustal shear zones is of tremendous importance for understanding the assembly of orogenic terranes.
Cenki-tok, Benedicte +4 more
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Systematics in the Pb^(208)-Th^(232), Pb^(207)-U^(235), and Pb^(206)-U^(238) Systems [PDF]
, 1966 In a study of cogenetic zircons it was found that the measured Pb^(208)/Th^(232) and Pb^(207)/U^(235) ratios formed a linear array in the corresponding coupled Pb-U-Th evolution diagram, which has an upper intersection on the concordia curve at the same ...
Steiger, Rudolf H., Wasserburg, G. J.
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U‐Pb dating of a remagnetized Paleozoic limestone [PDF]
Geophysical Research Letters, 1991 The Upper Ordovician Trenton Group of New York State is one of a number of Appalachian limestones which yields paleomagnetic poles suggesting disturbance in the late Paleozoic. Calcite fractions dissolved from samples of the Trenton Limestone define a 238U‐206Pb age of 454±8 Ma (MSWD=12.8) in excellent agreement with 40Ar−39 Ar and U‐Pb ages for the ...
DeWolf, Charles P., Halliday, Alex N.
openaire +2 more sources
A global zircon U–Th–Pb geochronological database [PDF]
Earth System Science Data, 2023 Since the start of the 21st century, the widespread application of ion probes has promoted the mass output of high-precision and high-accuracy U–Th–Pb geochronological data.
Y. Wu, X. Fang, J. Ji
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A Triassic to Cretaceous Sundaland–Pacific subduction margin in West Sarawak, Borneo [PDF]
, 2017 Metamorphic rocks in West Sarawak are poorly exposed and studied. They were previously assumed to be pre-Carboniferous basement but had never been dated. New 40Ar/39Ar ages from white mica in quartz-mica schists reveal metamorphism between c.
Boudagher-Fadel, M.K. +4 more
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Frontiers in Earth Science, 2022 Emerging evidence suggests that U-Pb and Lu-Hf ages of sedimentary apatite group minerals are often younger than their biostratigraphic ages. However, U-Pb dating of exquisitely preserved carbonate fluorapatite (CFA) is rare.
Jérémie Aubineau +7 more
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In situ U–Pb dating of 4 billion-year-old carbonates in the martian meteorite Allan Hills 84001 [PDF]
Geochronology, 2022 In situ carbonate U–Pb dating studies have proliferated dramatically in recent years. Almost all these studies have targeted relatively young terrestrial calcite up to Carboniferous in age.
R. Tartèse, I. C. Lyon
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Extent of the Ross Orogen in Antarctica: new data from DSDP 270 and Iselin Bank [PDF]
, 2011 The Ross Sea is bordered by the Late Precambrian–Cambrian Ross–Delamerian Orogen of East Antarctica and the more Pacific-ward Ordovician–Silurian Lachlan–Tuhua–Robertson Bay–Swanson Orogen.
Bradshaw +12 more
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Frontiers in Earth Science, 2023 Recent application of zircon U-Pb geochronology has contributed to deciphering the evolution of caldera systems worldwide. However, in the Tohoku region, NE Japan, this is not the case, although it is well studied as a typical island arc subduction ...
Hisatoshi Ito
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