Results 261 to 270 of about 7,532,149 (298)

Re-Os Isotope Geochemistry of Magmatic Sulfide Ore Systems

1999
Abstract The formation of magmatic Cu-Ni-Co-platinum-group element (PGE) sulfide deposits is dependent on mantlederived silicate magmas (komatiites and basalts) attaining sulfide saturation. Because the sulfur content of the upper mantle is considered to be low (250 ppm; McDonough and Sun, 1995), it is likely that, for moderate to ...
D. D. Lambert, J. G. Foster, L. R. Frick, E. M. Ripley   +3 more
openaire   +1 more source

High precision Re-Os isotopic dating of molybdenites

Molybdenite is an ideal mineral for Re-Os isotopic dating, and its Re-Os isotopic systematics are widely employed to constrain the timing of hydrothermal metal mineralization.
Xiaorui Fan, Jifeng Xu, Jie Li, Guiqin Wang, Yunchuan Zeng   +4 more
openaire   +1 more source

Re-Os Isotope ages of molybdenum deposits in East Qinling and their significance

Chinese Journal of Geochemistry, 1995
Dating of metallic ore deposits has been one of the problems concerned with by ore geologists for many years. The establishment of the Re-Os Isotope Laboratory at the Institute of Rock and Mineral Analysis, Chinese Academy of Geological Sciences, has provided us with a new technique to carry out geochronological studies of molybdenum ores.
Dianhao Huang, Chengyu Wu, Andao Du, Hongliao He   +3 more
openaire   +1 more source

Application of Re-Os isotopes to the study of lithospheric processes in Archaean terrains

2021
This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
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Paragenesis, Stable Isotopes, and Molybdenite Re-Os Isotope Age of the Lala Iron-Copper Deposit, Southwest China

Economic Geology, 2012
The Lala Fe-Cu deposit in the Kangdian iron oxide copper-gold (IOCG) metallogenic province, SW China, is hosted in the Paleoproterozoic Hekou Group. This volcanic-sedimentary sequence has undergone upper greenschist-lower amphibolite facies metamorphism at ~850 Ma.
Chen, WT, Zhou, MF
openaire   +3 more sources

Application of the Pt–Re–Os isotopic systems to mantle geochemistry and geochronology

Lithos, 2005
Abstract The Re–Os system has now been applied to a wide variety of problems in the solid earth sciences. This review concentrates on applications of the Re–Os system to understanding the age and composition of the mantle and the role that various materials in the mantle play in generating surface magmas.
openaire   +1 more source

Enriched Pt-Re-Os Isotope Systematics in Plume Lavas Explained by Metasomatic Sulfides

Science, 2008
To explain the elevated osmium isotope ( 186 Os- 187 Os) signatures in oceanic basalts, the possibility of material flux from the metallic core into the crust has been invoked. This hypothesis conflicts with theoretical constraints on Earth's thermal and dynamic history.
Ambre, Luguet, D, Graham Pearson, Geoff M, Nowell, Scott T, Dreher, Judith A, Coggon, Zdislav V, Spetsius, Stephen W, Parman   +6 more
openaire   +2 more sources

Evolution of the Earth's Mantle: Perspective from the Re-Os Isotopic System

Mineralogical Magazine, 1994
The Re-Os isotopic system (Allegre and Luck, 1980; Faure, 1986; Shirey, 1991) has seen increasing use as a unique tracer, complementry to other radioisotope systems because of its chaleophile/siderophile behavior. Increased use has followed improvements in measurement sensitivity (Creaser et al., 1991; Vlkening et aL, 1991), analytical accuracy ...
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Re-Os Isotopic Characteristics of Himalayan River Sediments and Source Rocks

Mineralogical Magazine, 1998
The 187Os/188Os ratio of the oceans has increased markedly during the Cenozoic Era, particularly during the past 15 My (Pegram et al., 1992; Peucker-Ehrenbrink et al., 1995). Some authors attribute this rise to increased weathering caused by the Himalayan collision, in analogy with similar models proposed to explain the seawater Sr isotopic record.
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Interpretation of geological significance of Re-Os isotopic age of bitumen

Acta Petrologica Sinica, 2022
LI Chao, SUN PengCheng, MENG HuiMing, WANG DengHong, ZHOU LiMin, LI XinWei, ZHAO Hong, QU WenJun   +7 more
openaire   +1 more source