osmium isotopes rhenium

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  Fine-grained interplanetary dust input during the Turonian …

  20231212 · Peucker-Ehrenbrink, B. & Jahn, B. M. Rhenium-osmium isotope systematics and platinum group element concentrations: Loess and the upper continental crust. Geochem. Geophys.

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  Rhenium and osmium isotopes in black shales and Ni-Mo …

  199411 · Rhenium and osmium abundances and osmium isotopic compositions were determined by negative thermal ionization mass spectrometry for samples of Devonian black shale and an associated Ni-enriched sulfide layer from the Yukon Territory, Canada. ... Osmium isotope evidence for rapid melt migration towards the Moho in the Oman …

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  Rhenium - an overview | ScienceDirect Topics

  Naturally occurring rhenium is a mixture of two isotopes: 185 Re (natural abundance: 37.07%) and the 187 Re (natural abundance: 62.93%). 3 Although representing the main constituent in natural rhenium sources, 187 Re is weakly radioactive with a β −-emission with the very long half-life of 5 × 10 10 yr. 4 The 187 Re/ 187 Os isotope SYSTEM is used in …

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  Rhenium‐Osmium Isotope Measurements of Geological …

  Rhenium-Osmium Isotope Measurements of Geological Reference Material BIR-1a: Evaluation of Homogeneity and Implications for Method Validation and Quality Control. ... CRPG) and is homogeneous in 187 Os/ 188 Os isotope amount ratio (0.13371 ± 0.00092, 2s, n = 63) at the 0.2–1.0 g test portion size level.

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  Rhenium-Osmium Isotope Systematics of Carbonaceous Chondrites

  Rhenium and osmium concentrations and Os isotopic compositions of eight carbonaceous chondrites, one LL3 ordinary chondrite, and two iron meteorites were determined by resonance ionization mass spectrometry. Iron meteorite 187 Re/ 186 Os and 187 Os/ 186 Os ratios plot on the previously determined iron meteorite isochron, but most chondrite data ...

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  Osmium isotopes as petrogenetic and geological tracers

  198061 · Such are the osmium isotopes. The ISTRe decays into 187Os by/~- decay with a decay constant of about 1.6 X 10-tl yr-1 [3]. Rhenium and osmium are both siderophile-chalcophile elements and therefore are suspected of concentrating in the core during early differentiation.

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  Direct radiometric dating of hydrocarbon deposits using rhenium-osmium ...

  2005527 · Rhenium-osmium (Re-Os) data from migrated hydrocarbons establish the timing of petroleum emplacement for the giant oil sand deposits of Alberta, Canada, at 112 +/- 5.3 million years ago. ... Direct radiometric dating of hydrocarbon deposits using rhenium-osmium isotopes Science. 2005 May 27;308(5726):1293-5. doi: 10.1126/science.1111081.

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  Rhenium–Osmium Geochronology: Sulfides, …

  2013916 · Here we report the osmium (Os) isotope fingerprint of an extraterrestrial impact from Upper Triassic chert successions in Japan. ... B. Rhenium-osmium isotope systematics and platinum group ...

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