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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New carbon isotope stratigraphy of the Ediacaran–Cambrian boundary interval from SW China: implications for global correlation
Da Li,Hong-Fei Ling,Shao-Yong Jiang,Jia-Yong Pan,Yong-Quan Chen,Yuan-Feng Cai,Hong-Zhen Feng +6 more
TL;DR: Li et al. as discussed by the authors studied and systematically sampled the Laolin section and presented new carbon isotope data for this section, which revealed a large negative δ13C excursion (−7.2‰, L1′) in the Daibu Member, and a large positive excursion (+3.5 ǫ, L4 ) in the Dahai Member.
Journal ArticleDOI
Strontium and carbon isotope geochemistry applied to dating of carbonate sedimentation: an example from high-grade rocks of the Norwegian Caledonides
TL;DR: In this paper, isotope stratigraphy has been applied to an undated, high-grade carbonate sequence from the Norwegian Caledonides in order to constrain the depositional age.
Journal ArticleDOI
Heterogeneous generation and evolution of diagenetic quartzarenites in the Silurian-Devonian Furnas Formation of the Paraná Basin, southern Brazil
TL;DR: In this paper, the authors show that the application of simplified "isochemical" models of diagenetic processes within the system SiO2Al2O3K2OH2O may have very limited validity, applying basically to the deep-burial mesodiagenesis of some sandstones in rapidly subsiding basins.
Journal ArticleDOI
Sulphur isotopic evolution of Neoproterozoic-Cambrian seawater: new francolite-bound sulphate δ34S data and a critical appraisal of the existing record
TL;DR: In this paper, the authors show that seawater δ(34)S was 32.5 µm (±2 µm) during the deposition of the upper Doushantuo unit, which is consistent with a sustained increase in seawater sulphur isotope composition between 750 and 570 Ma.
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Carbonate cementation patterns and diagenetic reservoir facies in the Campos Basin cretaceous turbidites, offshore eastern Brazil
TL;DR: The porosity and permeability distribution in the Namorado (Albian-Cenomanian) and Carapebus (Turonian-Santonian) sandstones is investigated in this paper.
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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