Results 31 to 40 of about 7,803,272 (294)
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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Литосфера, 2020 Research subject. The isotopic composition (Pb-Pb, Sm-Nd, Rb-Sr, Os/Os, Hf/Hf, 3 He/4 He, etc.) of magmatic complexes and ore-magmatic systems (OMS) of two ore clusters (Kupolsky and Ilirneysky) located in the subpolar Western Chukotka was studied. These
V. G. Sakhno, L. S. Tsurikova
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Yankuang ceshi, 2018 BACKGROUND The Huize ultra-large lead-zinc deposit is a typical MVT or HZT type deposit in the lead-zinc polymetallic belt. This deposit is known as a unique metallogenic system and germanium enrichment. Due to the low mineralization temperature and lack
JIANG Xiao-jun +6 more
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Re‐Os isotopic constraints on the formation of mantle and crustal reservoirs
Australian Journal of Earth Sciences, 1991 The measured 187Os/186Os of uncontaminated oceanic peridotites and basalts ranges between 1.0032 ± 0.0072 and 1.111 ± 0.011 (2σx). This range reflects chemical fractionation of the incompatible parent element Re from compatible Os in the mantle during crust production and subsequent isolation of the Re depleted regions of the mantle for time periods in
C.E. Martin, B.K. Esser, K.K. Turekian
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Yankuang ceshi, 2016 Quartz vein-type gold deposits of Southeastern Guizhou Province in the southwestern margin of Jiangnan Orogen, which are typical orogenic gold deposits, are hosted in Neoproterozoic Banxi Group sub-greenschist facies metamorphic rocks.
GU Shang-yi +4 more
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Heterogeneous Os isotope compositions in the Kalatongke sulfide deposit, NW China: the role of crustal contamination [PDF]
, 2012 Re-Os isotope compositions of mantle-derived magmas are highly sensitive to crustal contamination because the crust and mantle have very different Os isotope compositions.
Zhou, MF +7 more
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The Re-Os Isotopic System: Geochemistry and Methodology at the Geochronological Research Center (CPGeo) of the University of São Paulo, Brazil [PDF]
Geologia USP. Série Científica, 2007 The Re-Os isotopic system is an important tool for the study of mantle-crust processes, geochronology and the tracingof source reservoirs for metal deposition.
Ciro Teixeira Correia +5 more
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Morozkinskoye gold deposit (southern Yakutia): age and ore sources
Записки Горного института, 2021 The paper presents the results of the comprehensive isotope geochemical (Re-Os, Pb and δ34S) study of sulfide mineralization of the Morozkinskoye deposit. The ore zones of the deposit are localized in the syenite massif of Mount Rudnaya, which is located
Vladislav E. Guzev +3 more
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(Table 1) Re, Ir, and Os isotope record of ODP SIte 159-959
, 1998 (Table 1) Re, Ir, and Os isotope record of ODP SIte 159 ...
Gregory E Ravizza (6965528) +1 more
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