Journal ArticleDOI
An isotopic study of siderites, dolomites and ankerites at high temperatures☆
J Rosenbaum,S.M.F Sheppard +1 more
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TLDR
In this paper, an empirically derived relationship between the chemical composition of a carbonate in the CaCO3-(Ca, Mg)(CO3)2-FeCO3 system and the function 103 In α at 100°C is 103 ∆ α = 8.94XCaCO3 + 9.29XMgCO3+ 8.77XFeCo3 where Xi is the mole percent of component i in the carbonate.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1986-06-01. It has received 768 citations till now. The article focuses on the topics: Carbonate & Ankerite.read more
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Journal ArticleDOI
Clay- and Zeolite-bearing Triassic Sediments at Kaka Point, New Zealand: Evidence of Microbially Influenced Mineral Formation from Earliest Diagenesis into the Lowest Grade of Metamorphism
C. V. Jeans,Anthony E. Fallick,M. J. Fisher,Richard J. Merriman,R. M. Corfield,B. Manighetti +5 more
TL;DR: The distribution, mineralogy, petrology and bulk and stable isotope chemistry of altered volcanic ash beds in the marine sediments of mid-Triassic age (Etalian) at Kaka Point, New Zealand, are described and related to lithofacies and the geological processes controlling their development as discussed by the authors.
Journal ArticleDOI
Geology and stable isotope (O, H, C, S) constraints on the genesis of the Cachoeira gold deposit, Gurupi Belt, northern Brazil
Evandro Luiz Klein,Chris Harris,André Giret,Candido Augusto Veloso Moura,Rômulo Simões Angélica +4 more
TL;DR: The Cachoeira gold deposit is one of several large (N20 tonnes Au), shear-zone hosted hydrothermal gold deposits of the Proterozoic Gurupi Belt in northern Brazil as mentioned in this paper.
Book ChapterDOI
The Ancient Anoxic Biosphere Was Not As We Know It
TL;DR: In this paper, the authors propose that pre-2000 Ma sedimentary rocks commonly contain microbially mediated, 13C-depleted carbonate concretions, such features are largely absent in older rocks.
Journal ArticleDOI
Neoproterozoic evaporites and their role in carbon isotope chemostratigraphy (Amadeus Basin, Australia)
TL;DR: In this paper, the authors proposed that the Bitter Springs Group chemostratigraphy has been correlated globally and the negative excursion was named previously after this unit (Bitter Springs Stage anomaly), however, the mechanism of evaporation-driven fractionation of δ 13 C is different from the commonly proposed inorganic-organic carbon fractionation.
Journal ArticleDOI
Black chert-hosted manganese deposits from the Bistritei Mountains, Eastern Carpathians (Romania): petrography, genesis and metamorphic evolution
Marian Munteanu,Stefan Marincea,Haino Uwe Kasper,Karel Zak,Veronica Alexe,Vasile Trandafir,George Saptefrati,Angela Mihalache +7 more
TL;DR: The East Carpathian manganese deposits (ECMD) as mentioned in this paper occur in the Tulghes Group, a Cambrian-Ordovician island arc complex metamorphosed under greenschist facies conditions during the Silurian.
References
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Journal ArticleDOI
Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide
TL;DR: In this paper, Niee's and Solenhofen standards were compared to the Chicago PDB standard for carbon and oxygen isotope ratios, and the correction factors for instrumental effects and for the nature of the mass spectra were derived.
Journal ArticleDOI
On the Isotopic Chemistry of Carbonates and a Paleotemperature Scale
TL;DR: In this paper, the temperature variation of the fractionation of oxygen in exchange reactions between dissolved carbonate and water and between calcite and water was calculated on theoretical grounds, and checked experimentally.
Journal ArticleDOI
The use of bromine pentafluoride in the extraction of oxygen from oxides and silicates for isotopic analysis
TL;DR: In this paper, a technique was developed in which bromine pentafluoride was used as a reagent for quantitative liberation of oxygen from oxides and silicates, and the results of isotopic analyses were compared with measurements made in other laboratories by other procedures.
Journal ArticleDOI
Measurement of O18O16 ratios of total oxygen of carbonates
TL;DR: The commonly used phosphoric acid procedure for the determination of oxygen isotope abundances in carbonates involves a large kinetic isotope effect as mentioned in this paper, which leads to an overestimate of the dolomite-calcite oxygon isotope fractionation by 0.8 per mil.
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