Results 21 to 30 of about 7,532,149 (298)
Yankuang ceshi, 2020 BACKGROUND Organic-rich sedimentary rocks of the Wufeng-Longmaxi Formation are widely developed in the Ordovician-Silurian boundary of the Upper Yangtze platform in China, which is rich in shale gas resources. Using the Re-Os isotope system to study this
LI Xin-wei +3 more
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Yankuang ceshi, 2018 BACKGROUND The Kunyang phosphate deposit in central Yunnan is the largest marine sedimentary phosphorite deposit in China. The deposit is hosted in black shale of the Lower Cambrian Meishucun Formation.
YAN Qing-gao +5 more
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Re-Os isotope geochemistry of three Chinese chondrites
Chinese Science Bulletin, 2007 Three Chinese ordinary chondrites, including Jilin (H5), Boxian (LL3.8) and Lujiang (LL6), have been studied for their Re and Os abundances and Os isotopic composition in whole-chondrite samples, separated magnetic and nonmagnetic fractions, and nodules. The results indicate that the Re and Os abundances of the whole-chondrite samples are in the ranges
XiaChen Zhi +3 more
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Re-Os Isotopes in the Horoman Peridotite: Evidence for Refertilization? [PDF]
Journal of Petrology, 2001 1992, 1994, 1996, 1999, 2000; Takazawa, 1996). The the peridotites are increasingly depleted in a basalticmain objectives of this Re–Os study are to determine component. The boundary between the compositionalthe origin of the plagioclase lherzolites (do they represent layers is sharp on a megascopic scale, but transitionalunmelted fertile peridotite or
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Vestnik MGTU, 2021 Sm-Nd isochrone, drawn for rock-forming and sulfide minerals from the Ozernoe ore occurrence, indicates albitite age of 1,759 ± 11 Ma. It shows synchronous formation of albitite and sulfide mineralization, and fully corresponds to the earlier defined age
Kalinin A. A. +2 more
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Yankuang ceshi, 2016 The Neoproterozoic to Early Cambrian period is a very important era in the history of earth evolution. Research on stratigraphic framework, paleo-oceanography, palaro-atmospheric, and paleoclimatology are focuses of international geosciences.
WANG Fu-liang +7 more
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Frontiers in Earth Science, 2022 Increasing application of high precision uranium-lead (U-Pb) and rhenium-osmium (Re-Os) geochronology to the ancient geological record has resulted in massive improvement in age control and calibration of key Proterozoic stratigraphic successions and ...
Galen P. Halverson +3 more
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Re‐Os isotope systematics in carbonates from Serpent Mound, Ohio: Implications for Re‐Os dating of crustal rocks and the osmium isotopic composition of Ordovician seawater [PDF]
Geochemistry, Geophysics, Geosystems, 2004 Eleven core samples of Ordovician carbonates and shale from within and nearby the Serpent Mound (Ohio) cryptoexplosion structure were analyzed for Re‐Os isotopes. Whole‐rock samples span a large range in measured 187Os/188Os (0.714 to 6.083), and exhibit a linear correlation of 187Os/188Os with 187Re/188Os.
Elisabeth Widom +2 more
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Stable carbon and radiocarbon isotope compositions of particle size fractions to determine origins of sedimentary organic matter in an estuary [PDF]
, 2002 Stable and radioactive carbon isotopic compositions of particle size fractions of a surface sediment from the Ems-Dollard estuary vary considerably with particle size. The organic material in the fine fractions (
Megens, L., +7 more
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Записки Горного института, 2020 The article presents the results of the sulfide mineralization dating of the Mayskoe gold ore deposit using the Re-Os isotope system and isochron age estimation method of the main sulfide minerals: arsenopyrite, pyrite, and antimonite.
Dmitry S. Artemiev +3 more
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