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Carbon isotopes as biogeochemical recorders of life over 3.8 Ga of Earth history: evolution of a concept
Ever since pioneering studies in the late 1930s had shown that the conversion of inorganic carbon into biogenic substances entails sizeable redistributions of the stable carbon isotopes, biologicallyExpand
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Isotopic inferences of ancient biochemistries - Carbon, sulfur, hydrogen, and nitrogen
In processes of biological incorporation and subsequent biochemical processing sizable isotope effects occur as a result of both thermodynamic and kinetic fractionations which take place duringExpand
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Precambrian sedimentary carbonates: carbon and oxygen isotope geochemistry and implications for the terrestrial oxygen budget☆
Abstract Carbon isotope values of 260 Precambrian limestones and dolomites (most of them being substantially unaltered) have yielded an overall mean of δ 13 C = +0.4 ± 2.7‰ vs. PDB; the correspondingExpand
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Carbon isotope geochemistry of the Precambrian Lomagundi carbonate province, Rhodesia
Abstract Carbon isotope measurements carried out on 67 dolomite samples from the Middle Precambrian Lomagundi Group (Rhodesia) have yielded a δ 13 C mean of +8.2 ± 2.6%. vs PDB. With the outcrop ofExpand
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87Sr86Sr in Late Proterozoic carbonates: evidence for a “mantle” event at ∼900 Ma ago
Abstract Strontium isotopic measurements were made on Late Proterozoic carbonates from West African Craton. Comparison of samples with acceptable trace element patterns with coeval data from southernExpand
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Enriched Subcontinental Upper Mantle beneath Southern India: Evidence from Pb, Nd, Sr, and C-O Isotopic Studies on Tamil Nadu Carbonatites
The major, trace and rare earth element distributions as well as the contrast to the lead data, the Nd–Sr isotope data show a clear Nd, Sr, Pb, C and O isotope geochemistry of four carbonatiteExpand
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Carbon isotope geochemistry of the 3.7 × 109-yr-old Isua sediments, West Greenland: implications for the Archaean carbon and oxygen cycles
One hundred and twenty-four carbonate samples from the meta-sedimentary sequence of the 3.7 × 109 yr old Isua supracrustal belt (W-Greenland) have yielded a δ13Ccarb average of −2.5 ± 1.7%. vs PDBExpand
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New C isotope stratigraphy from southwest China: Implications for the placement of the Precambrian-Cambrian boundary on the Yangtze Platform and global correlations
A high-resolution C isotope profile from a fossiliferous section spanning the Precambrian-Cambrian (PC-C) boundary on the Yangtze Platform, southwest China, is used to constrain C isotopeExpand
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Application of Stable Carbon Isotopes to Early Biochemical Evolution on Earth
The emergence and early evolution of life on Earth have long been intriguing subjects for scientific inquiry and a continuous source of intel­ lectual excitement. Current work at this frontierExpand
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Rare-earth elements and Stable Isotope Geochemistry of early Cambrian chert-phosphorite assemblages from the Lower Tal Formation of the Krol Belt (Lesser Himalaya, India)
Abstract The Neoproterozoic–Cambrian transitional sequence in the Mussoorie and Garhwal Hills of the Lesser Himalaya is represented by dolomites of the Upper Krol Formation and chert-phosphoriteExpand
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