Die Geochemie des Rheniums

Noddack, Ida; Noddack, W.

doi:10.1515/zpch-1931-15414

Cited by 58 publications

(18 citation statements)

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“…In organic-rich sediments, the majority of the Re and Os inventories are authigenic, and incomplete digestion of detrital material is therefore assumed to have little impact on the overall amount of these elements in solution (Nozaki et al, 2012). Certain lithogenic minerals, such as molybdenites, contain relatively high concentrations of Re and Os (Miller et al, 2011;Noddack and Noddack, 1931;Suzuki et al, 1993) due to their chalcophilic behavior (Goldschmidt, 1922). Incomplete digestion of these phases could lead to the discrepancies between the two groups ("Group A" and "Group B").…”

Section: Authigenic Enrichment Of Redox Sensitive Elementsmentioning

confidence: 99%

“…In contrast to Os, Re is a moderately incompatible element whose enrichment ratio between the earth's mantle and the crust of ~2x10 2 /1 is much less pronounced (Ahrens, 1995;Allègre et al, 2001;Schmidt and Palme, 1997;Ahrens, 1995 Miller et al, 2011;Noddack and Noddack, 1931;Suzuki et al, 1993) and marine sediments with high organic carbon contents that were deposited under reducing conditions (e.g. .…”

Section: Introductionmentioning

confidence: 99%

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A magmatic trigger for the Paleocene-Eocene Thermal Maximum?

Dubin¹

2015

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Fifty-six million years ago Earth experienced rapid global warming (~6°C) that was caused by the release of large amounts of carbon into the ocean-atmosphere system. This Paleocene-Eocene Thermal Maximum (PETM) is often cited as an analogue of anthropogenic climate change. Many trigger mechanisms for the carbon release at the PETM have been proposed. Common to all scenarios is rapid release of isotopically light carbon (< 13 C/ 12 C values) from methane hydrates, terrestrial or marine organic matter, as indicated by a pronounced excursion to light carbon isotope values across the PETM. I test the hypothesis that the PETM warming and isotope excursion were caused by the intrusion of a magmatic sill complex into organic-rich sediments in the North Atlantic. The intrusion of magma into sedimentary rocks will cause heating and metamorphic reactions in a thermal aureole around the intrusion. If these sediments are rich in organic matter, large volumes of isotopically light carbon are rapidly released. I examine geochemical evidence from lead, osmium, and organic carbon to place constraints on the extent the carbon isotope excursion during the PETM may have been caused by contact metamorphism of organic-rich sediments. Potential terrestrial and submarine analogs are examined to determine the behavior of these elements during thermal alteration. Furthermore, geochemical evidence from sediment cores at the PETM provides additional information about what might have caused the carbon isotope excursion. I find that lead is not a suitable proxy for carbon mobilization to the overlying seawater during contact metamorphism. Osmium, however, is mobilized together with carbon. Making reasonable assumptions for the 187 Os/ 188 Os of the sediments from the North Atlantic Magmatic Province (NAMP), constrained by the 187 Re/ 188 Os of organic-rich sediments and the depositional age of the sediment, the entire marine osmium isotope anomaly at the PETM could be explained without the need to invoke enhanced continental weathering. Based on estimates of the extent of mobilization of organic carbon relative to osmium, approximately 47% to 60% of the carbon released at the PETM may have been derived from thermal alteration of organic-rich sediments in the NAMP.

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Section: Authigenic Enrichment Of Redox Sensitive Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A magmatic trigger for the Paleocene-Eocene Thermal Maximum?

Dubin¹

2015

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“…The last naturally occurring chemical element to be discovered-rhenium-is highly valuable but very scarce, with an average concentration in the Earth's crust estimated to be lower than 1 ppb [1].…”

Section: Introductionmentioning

confidence: 99%

Towards the Recovery of By-Product Metals from Mine Wastes: An X-Ray Absorption Spectroscopy Study on the Binding State of Rhenium in Debris from a Centennial Iberian Pyrite Belt Mine

Figueiredo¹,

Silva

Veiga³

et al. 2014

JMMCE

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Rhenium is a very scarce element, occurring in the Earth's crust mainly carried by molybdenite (MoS 2 ). Due to a very low availability comparative to actual industrial demand, rhenium is nowadays one of the most expensive mineral commodities and an increased interest is focused on exploring residues resulting from a long-term mining, particularly of sulphide ore deposits. It is therefore noteworthy to assign the presence of rhenium (in a concentration up to 3 ppm) in the waste materials from the old sulphur factory at the abandoned mine of São Domingos (Iberian Pyrite Belt, Southeast Portugal), exploited since the Roman occupation of Iberia. Aiming at a potential sustainable recovery of rhenium as a by-product, X-ray near-edge absorption spectroscopy (XANES) was applied to clarify the Re-binding and mode of occurrence by comparing Re L 3 -edge XANES spectra obtained from mine waste samples (previously fully characterized by X-ray laboratory techniques) with similar spectra collected from Re-rich molybdenites (Mo 1−x Re x S 2 ) and from Re-O model compounds configuring various valences and coordination environments of rhenium ions. Obtained results are commented, ruling out a possible Re-S binding and rather conforming with the binding of rhenium to oxygen in the analysed mine waste materials.

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“…Rhenium (Re) was the last naturally occurring element to be discovered, with a mean concentration in the earth's crust of the order of 1 ppb [1]. This very scarce element has been found in granite pegmatites and quartz veins (e.g.…”

Section: Introductionmentioning

confidence: 99%

Molybdenite as a Rhenium Carrier: First Results of a Spectroscopic Approach Using Synchrotron Radiation

Pereira¹,

Maria-Ondina²,

Oliveira³

et al. 2013

JMMCE

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The chemical and physical properties of rhenium render it a highly demanded metal for advanced applications in important industrial fields. This very scarce element occurs mainly in ores of porphyry copper-molybdenum deposits associated with the mineral molybdenite, MoS 2 , but it has also been found in granite pegmatites and quartz veins as well as in volcanic gases. Molybdenite is a typical polytype mineral which crystal structure is based on the stacking of [SMo-S] with molybdenum in prismatic coordination by sulphide anions; however, it is not yet clearly established if rhenium ions replace Mo 4+ cations in a disordered way or else, if such replacement gives rise to dispersed nanodomains of a rhenium-rich phase. As a contribution to clarify this question, an X-ray absorption spectroscopy (XANES) study using synchrotron radiation was performed at the Re L 3 -edge of rhenium-containing molybdenite samples. Obtained results are described and discussed supporting the generally accepted structural perspective that rhenium is mainly carried by molybdenite through the isomorphous replacement of Mo, rather than by the formation of dispersed Re-specific nanophase(s).

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Die Geochemie des Rheniums

Cited by 58 publications

References 0 publications

A magmatic trigger for the Paleocene-Eocene Thermal Maximum?

A magmatic trigger for the Paleocene-Eocene Thermal Maximum?

Towards the Recovery of By-Product Metals from Mine Wastes: An X-Ray Absorption Spectroscopy Study on the Binding State of Rhenium in Debris from a Centennial Iberian Pyrite Belt Mine

Molybdenite as a Rhenium Carrier: First Results of a Spectroscopic Approach Using Synchrotron Radiation

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