Dissecting the Re-Os molybdenite geochronometer
نویسندگان
چکیده
منابع مشابه
Fluid inclusion characteristics and molybdenite Re-Os geochronology of the Qulong porphyry copper-molybdenum deposit, Tibet
The Qulong porphyry copper and molybdenum deposit is located at the southwest margin of the Lhasa Terrane and in the eastern region of the Gangdese magmatic belt. It represents China’s largest porphyry copper system, with ∼2200 million tonnes of ore comprising 0.5 % Cu and 0.03 % Mo. The mineralization is associated with Miocene granodiorite, monzogranite and quartz-diorite units, which intrude...
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he Boddington Au-Cu mine is located in the southwestern corner of the Yilgarn craton in the Western Gneiss terrane in Western Australia. The mineralization is hosted in the northern part of the Saddleback greenstone belt which includes an early sequence of basaltic to dacitic volcanic rocks and associated shallow level porphyry intrusions emplaced between ~2714-2696 Ma. After two periods of def...
متن کاملAn atomic level study of rhenium and radiogenic osmium in molybdenite
Local atomic structures of Re and radiogenic Os in molybdenite from the Onganja mine, Namibia, were examined using X-ray absorption fine structure (XAFS). Rhenium LIII-edge X-ray absorption near-edge structure (XANES) and extended Xray absorption fine structure (EXAFS) show that the oxidation state of Re, the interatomic distances between Re and the neighboring atoms, and the coordination numbe...
متن کاملFurther evaluation of the Re-Os geochronometer in organic-rich sedimentary rocks: A test of hydrocarbon maturation effects in the Exshaw Formation, Western Canada Sedimentary Basin
Re-Os isotopic analyses of a single organic-rich sedimentary rock unit (ORS) of known depositional age, and at three levels of regional hydrocarbon maturity, show that hydrocarbon maturation does not affect the ability the Re-Os chronometer to yield a depositional age for such rocks. We present Re-Os isotope analyses from the Late Devonian Exshaw Formation in the subsurface of the Western Canad...
متن کاملRe-Os ISOCHRON FOR ALLEGAN (H5): RECONCILING
Introduction: Beta decay of Re is characterized by the lowest known decay energy, which makes direct counting determination of the decay constant very difficult. The best direct estimate for λRe (1.64·10 y ±3.1%) was obtained by the radiochemical in-growth method [1]. This result was generally accepted for geochronology, although its uncertainty precludes precise comparison of Re-Os ages with o...
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ژورنال
عنوان ژورنال: Scientific Reports
سال: 2017
ISSN: 2045-2322
DOI: 10.1038/s41598-017-16380-8