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U-Pb dating of skarn garnets from Bulgarian deposits
2020<p>Calcic garnets from grossular-andradite (grandite) series have proven their ability to record the conditions and timing of their formation processes. Typically these minerals occur in skarn systems, together with other calc-silicates (diopside, epidote) and commonly host economic Cu, Zn-Pb-Ag, Au, Sn, W or Mo mineralization ...
Rossitsa Vassileva +4 more
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Geophysical Research Letters, 2018
The relative importance of global cooling and Tibetan Plateau uplift in driving the aridification of Asia during the late Cenozoic is debated, largely due to the lack of appropriate proxy indicators.
Hanzhi Zhang +6 more
semanticscholar +1 more source
The relative importance of global cooling and Tibetan Plateau uplift in driving the aridification of Asia during the late Cenozoic is debated, largely due to the lack of appropriate proxy indicators.
Hanzhi Zhang +6 more
semanticscholar +1 more source
U-Pb dating of a speleothem of Quaternary age
Geochimica et Cosmochimica Acta, 1998We demonstrate that U-Pb dating is a promising method for secondary carbonate materials of Quaternary age and older by obtaining a 206Pb∗/238U age for a speleothem with high U (>10 μg g−1) and very low Pb (
Richards, DA +4 more
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Geostandards and Geoanalytical Research, 2019
LA‐ICP‐MS U–Pb detrital zircon studies typically analyse 50–200 grains per sample, with the consequent risk that minor but geologically important age components (e.g., the youngest detrital zircon population) are not detected, and higher abundance age ...
D. Chew, K. Drost, J. Petrus
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LA‐ICP‐MS U–Pb detrital zircon studies typically analyse 50–200 grains per sample, with the consequent risk that minor but geologically important age components (e.g., the youngest detrital zircon population) are not detected, and higher abundance age ...
D. Chew, K. Drost, J. Petrus
semanticscholar +1 more source
UPb dating of a carbonate subaerial exposure event
Earth and Planetary Science Letters, 1995Ten samples of the dolomite fraction from the Lower Ordovician Oneota Formation, directly below the Sauk-Tippecanoe unconformity in Wisconsin, define a 238U206Pb age of 504 ± 14 Ma (MSWD = 190, 206Pb204Pb = 27–85, 238U204Pb = 84–795), which is in agreement with the 500 ± 4 Ma depositional age based on conodont biostratigraphy.
Bryce L. Winter, Clark M. Johnson
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Geochemistry: does U-Pb date Earth's core formation?
Nature, 2006Constraining the timing of the formation of Earth's core, which defines the birth of our planet, is essential for understanding the early evolution of Earth-like planets. Wood and Halliday and Halliday discuss the apparent discrepancy between the U-Pb (60-80 Myr) and Hf-W clocks (30 Myr) in determining the timescale of Earth's accretion and core ...
Qing-zhu, Yin, Stein B, Jacobsen
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Identifying Geologically Meaningful U-Pb Dates in Fossil Teeth
2017Dating attempts on fossil material have thus far yielded mixed results. While successes have been reported on single specimens, most fossils are thought to have experienced a complex history that obscures a simple determination of age. For this thesis, transects along the cross-sections of 14 fossil alligorid teeth from the Arroyo Chijuillita Member of
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