... . 42 R. A. Creaser , D. A. Papanastassiou , and G. J. Wasserburg , “Negative thermal ion mass spectrometry of osmium, rhenium, and iridium,” Geochimica et Cosmochimica Acta , vol. 55 , no. 1 , pp . 397 – 401 , 1991 . 43 I. S. Puchtel , A. Mundl...

...Alan D. Rooney; Danny Hnatyshin; Jonathan Toma; Nicolas J. Saintilan; Alexie E.G. Millikin; David Selby; Robert A. Creaser Abstract The rhenium-osmium ( 187 Re- 187 Os) system is a highly versatile chronometer that is regularly applied to a wide range of geological and extraterrestrial materials...

... tube then dissolved in HCl and HNO 3 at 250°C for 72 h. Osmium was extracted by the conventional CCl 4 method. Rhenium, Ir, Ru, Pt and Pd were the first subgroup separated from the matrix elements into Re–Ru, Ir–Pt and Pd by a 2 ml anion exchange column. Subsequently, Re–Ru was further purified...

... rhenium mineral at Kudriavy volcano : Nature , v. 369 , p. 51 – 52 . Kuwahara , Y. , Yasukawa , K. , Fujinaga , K. , Nozaki , T. , Ohta , J. , Sato , H. , Kimura , J.-I. , Nakamura , K. , Yokoyama , Y. , and Kato , Y. , 2021 , Rapid coupling between solid...

... and aluminum ( Sørensen et al., 2020 ; Schulz et al., 2021 ). Recent studies based on the Alum Shale documented high rhenium (Re) and Os and a variable seawater Os-isotope signature (initial 187 Os/ 188 Os, hereafter Os i ) ( Rooney et al., 2022 ) during the SPICE interval and high Hg in the upper Cambrian...

...) . The rhenium-osmium (Re-Os) isotopic system is a unique geochemical tool for tracing the source of ore metals in magmatic-hydrothermal systems (e.g., Mathur et al., 2000 ; Morelli et al., 2007 ; Saintilan et al., 2021 ). Whereas Os is a compatible element during partial melting of the mantle, Re behaves...

... is caused by the difference in dimension of the layers enriched and depleted in rhenium. Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland 2022 The Author(s) molybdenite 3 R polytype rhenium twisting...

.... Although the biota provides remarkable insights into the early evolution of complex macroeukaryotes in the Ediacaran, the uncertainty in its age has hampered any robust biological evaluation. We resolve this issue by applying a petrographic-guided rhenium-osmium (Re-Os) organic-bearing sedimentary unit...

... geologic process. However, age control in most sedimentary Mn deposits is often hampered by the lack of reliable biostratigraphic constraints and/or the absence of tuff horizons suitable for zircon U-Pb dating, making the direct dating of these deposits a challenge. Rhenium-osmium geochronology has...

.... Rhenium-osmium isochron ages of Ikalukrok mudstone (339.1 ± 8.3 Ma), diagenetic pyrite (333.0 ± 7.4 Ma), and hydrothermal pyrite (334.4 ± 5.3 Ma) at Anarraaq are all within uncertainty of one another and of an existing isochron age (~338 Ma) for the Main deposit in the Red Dog district. This indicates...

... 12 01 2021 10 06 2021 08 09 2021 © 2022 Geological Society of America 2022 Rhenium (Re) and osmium (Os) are linked through β-decay of 187 Re to 187 Os. Due to the incompatible behavior of Re during mantle melting, both oceanic and continental crust (OC and CC, respectively...

... extraction and further purified by microdistillation. Rhenium was extracted and purified from the remaining solution by anion exchange using AG 1 × 8 resin (100–200 mesh). Instrumental mass fractionation for Os was corrected by normalizing the measured 192 Os/ 188 Os value to 3.08271. Oxide corrections were...

... of the Ocean Drilling Program , Initial Reports , Volume 189 : College Station, Texas, USA , Ocean Drilling Program , p. 1 – 149 , https://doi.org/10.2973/odp.proc.ir.189.107.2001 Shirey , S.B. , and Walker , R.J. , 1995 , Carius tube digestion for low-blank rhenium-osmium analysis...

... − . The sample was further prepared and changed to a 1.2 M HCl solution for loading to a RE resin column for the purification of Re. Rhenium concentrations were measured using multicollector–inductively coupled plasma–mass spectrometry (MC-ICP-MS; Nu Instruments, Wrexham, UK) at the ITP-CAS. Total blanks for Re...

... was isolated from the digested solutions by liquid–liquid extraction into chloroform and then into HBr and was further purified by two microdistillation steps using HBr and CrO 3 -H 2 SO 4 . Rhenium was isolated from the remaining digestion solutions using acetone-NaOH solvent extraction followed by a resin...

... and point; NC—Nipple Creek outcrop; SH#1—Smoky Hollow #1 Core. Existing δ 13 C chemostratigraphic profiles guided high-resolution sampling for rhenium-osmium geochemical analyses through the onset of OAE2 from the SH#1 Core ( n = 20, median spacing = 50 cm) and the Angus Core ( n = 15, median...

...Katie McFall; Stephen Roberts; Iain McDonald; Adrian J. Boyce; Jonathan Naden; Damon Teagle Abstract The Muratdere Cu-Mo (Au) porphyry deposit in western Turkey contains elevated levels of rhenium and is hosted within granodioritic intrusions into an ophiolitic mélange sequence in the Anatolian...