Results 21 to 30 of about 53,167 (298)

Study on the Re-Os Isotope Composition of Graphite from the Lutang Graphite Deposit in Hunan Province

Yankuang ceshi, 2017
Graphite has relatively high Re and Os contents and is an ideal mineral for Re-Os isotope dating. However, there are few studies on Re-Os dating of graphite.
LI Chao, WANG Deng-hong, ZHOU Li-min, ZHAO Hong, LI Xin-wei, QU Wen-jun   +5 more
doaj   +1 more source

Accurate Determination of the Age of the Carbonaceous Mudstone of the Ordovician-Silurian Boundary in Zheng'an County, Guizhou Province by Re-Os Isotope Dating Method and Its Application in Paleoenvironmental Inversion

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, LI Chao, ZHOU Li-min, ZHAO Hong   +3 more
doaj   +1 more source

Mantle heterogeneity during the formation of the North Atlantic Igneous Province: Constraints from trace element and Sr-Nd-Os-O isotope systematics of Baffin Island picrites [PDF]

, 2004
Sr-Nd-Os-O isotope and major and trace element data from ~62 Ma picrites from Baffin Island constrain the composition of mantle sources sampled at the inception of North Atlantic Igneous Province (NAIP) magmatism.
Eiler, J., Francis, D., Frei, R., Kent, A. J. R., Stolper, E. M., Woodhead, J.   +5 more
core   +1 more source

The Age and Sedimentary Environment of the Kunyang Phosphate Deposit, Central Yunnan: Constraints from Re-Os Isotopes

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, LI Chao, JIANG Xiao-jun, WANG Zhong-qiang, LI Yun-ju, LI Wei   +5 more
doaj   +1 more source

Discovery of Tantalum, Rhenium, Osmium, and Iridium Isotopes [PDF]

, 2011
Currently, thirty-eight tantalum, thirty-eight rhenium, thirty-nine osmium, and thirty-eight iridium, isotopes have been observed and the discovery of these isotopes is discussed here.
Abou-Leila, Akhmadzhanov, Alkhomashi, Amaldi, Amaldi, Arblaster, Arblaster, Arlt, Arlt, Aston, Aston, Aston, Aston, Aten, Aten, Audi, Baranov, Baro, Bedrosyan, Belyaev, Belyaev, Belyaev, Benlliure, Berlovich, Berlovich, Berlovich, Bernas, Bianco, Bishop, Blachot, Blichert-Toft, Borggreen, Bosch-Wicke, Bothe, Bruchertseifer, Burde, Butement, Butement, Butement, Butement, Butement, Cabot, Cabot, Chang, Christian, Chu, Crasemann, Davids, Della Negra, Diamond, Diamond, Eichler, Fajans, Faler, Fermi, Flegenheimer, Fomin, Foster, Gallagher, Ginepro, Goodman, Goriely, Grigorev, Haldar, Harmatz, Harmatz, Haustein, Hofmann, Hofmann, Hofmann, Hofstetter, Hollander, Hughes, Jansen, Joss, Kettunen, Kistiakowsky Fischer, Kurtchatov, Kurtschatow, Lavrukhina, Leber, Lederer, Liang, Liang, Lindner, Livingood, M. Thoennessen, Mahmud, McMillan, Meissner, Nadjakov, Nadzhakov, Nier, Oldenberg, Page, Page, Poe, Pool, R. Robinson, Rezanka, Runte, Schrewe, Schrewe, Seaborg, Seaborg, Siivola, Sinma, Smith, Steer, Steer, Sterna, Stover, Strominger, Surkov, Szalay, Szymanski, Szymanski, Thoennessen, Toth, Toth, Turner, Uusitalo, Valiente-Dobón, Venkatesachar, Vonach, Wilkinson, Wilkinson, Wilkinson, Xu, Zhao, Zhou, Zingg   +131 more
core   +1 more source

Laser-induced isotopic effects in titanium resonance ionization [PDF]

, 1993
Titanium isotope ratios have been measured by resonance ionization mass spectrometry (RIMS) with special emphasis on the nature of laser-induced isotopic selectivity.
Blake, Geoffrey A., Hutcheon, I. D., Wasserburg, G. J., Wunderlich, R. K.   +3 more
core   +1 more source

Recent progress on the research of Re–Os geochronology and Re–Os elemental and isotopic systematics in petroleum systems

Journal of Natural Gas Geoscience, 2020
Re–Os geochronometer has been used in the dating of generation-accumulation, thermal cracking, and thermochemical sulfate reduction of crude oil and the oil-source correlation of petroleum systems in recent years. Re and Os concentrations are higher in the asphaltene fraction of crude oil and the earlier precipitated fractions of asphaltene.
Yanming Sai, Keyu Jin, Mingzhuang Luo, Hui Tian, Jie Li, Junjie Liu   +5 more
openaire   +2 more sources

Seawater osmium isotope evidence for a middle Miocene flood basalt event in ferromanganese crust records [PDF]

, 2008
Three ferromanganese crusts from the northeast, northwest and central Atlantic were re-dated using osmium (Os) isotope stratigraphy and yield ages from middle Miocene to the present.
Frank, Martin, Halliday, Alex N., Hein, James R., Klemm, Veronika, Levasseur, Sylvain   +4 more
core   +1 more source

The s-process branching at 185W [PDF]

, 2002
The neutron capture cross section of the unstable nucleus 185W has been derived from experimental photoactivation data of the inverse reaction 186W(gamma,n)185W.
A. Mengoni, A. Zilges, F. Kappeler, Goryachev A. M., H. Beer, K. Sonnabend, K. Vogt, Koehler P. E., Lambert D. L., Mengoni A., Mohr P., P. Mohr, R. Gallino, T. Rauscher   +13 more
core   +2 more sources

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
openaire   +1 more source