Precambrian sedimentary carbonates: carbon and oxygen isotope geochemistry and implications for the terrestrial oxygen budget

Schidlowski, Manfred; Eichmann, R.; Junge, Christian

doi:10.1016/0301-9268(75)90018-2

Cited by 319 publications

(90 citation statements)

References 35 publications

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“…Since 3.5 Ga ago or earlier, a substantial fraction (15^25%) of the carbon degassed from the Earth's interior has been segregated as isotopically depleted biological carbon, leaving an inorganic reservoir (75^85%) enriched in 13 C (e.g. Schidlowski et al 1975;Abell et al 1985). The magnitude of the isotopic fractionation is unambiguous evidence that the enzyme involved in capturing the carbon was rubisco.…”

Section: Introductionmentioning

confidence: 99%

Antiquity of the biological sulphur cycle: evidence from sulphur and carbon isotopes in 2700 million–year–old rocks of the Belingwe Belt, Zimbabwe

Grassineau

Nisbet

Bickle

et al. 2001

Proc. R. Soc. Lond. B

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Sulphur and carbon isotopic analyses on small samples of kerogens and sulphide minerals from biogenic and non-biogenic sediments of the 2.7Â10 9 years(Ga)-old Belingwe Greenstone Belt (Zimbabwe) imply that a complex biological sulphur cycle was in operation. Sulphur isotopic compositions display a wider range of biological fractionation than hitherto reported from the Archaean. Carbon isotopic values in kerogen record fractionations characteristic of rubisco activity, methanogenesis and methylotrophy, and possibly anoxygenic photosynthesis. Carbon and sulphur isotopic fractionations have been interpreted in terms of metabolic processes in 2.7 Ga prokaryote mat communities, and indicate the operation of a diverse array of metabolic processes. The results are consistent with models of early molecular evolution derived from ribosomal RNA.

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Section: Introductionmentioning

confidence: 99%

Antiquity of the biological sulphur cycle: evidence from sulphur and carbon isotopes in 2700 million–year–old rocks of the Belingwe Belt, Zimbabwe

Grassineau

Nisbet

Bickle

et al. 2001

Proc. R. Soc. Lond. B

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“…At that time, authors did not recognize global significance of this phenomenon nor related it to a high relative burial rate of organic carbon. Seven years later, Galimov et al (1975) reproduced earlier observations on a larger set of samples from Karelia and Kola Peninsula and Schidlowski et al (1975) found similar values in correlative units of the Peräpohja Schist Belt in Finland near Gulf of Bothnia and in carbonates of the Lomagundi Group, Zimbabwe. The following year, Schidlowski et al (1976) analyzed 67 carbonate samples from the Lomagundi Group, Zimbabwe, establishing for the first time basin-scale extent of this anomaly and its name.…”

Section: Historymentioning

confidence: 68%

Lab on a Chip

2015

Encyclopedia of Astrobiology

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“…The variable oxygen isotope 18 O SMOW versus 13 C PDB plot: circles indicate data from this study (Table 3) and diamonds indicate data from dolomite marble deposits/veins and a calcite + albite + quartz dike in the Kragerø area by Dahlgren et al [32]. BG = Bamble hyperites [37]; CBT = world carbonatites [38]; PC = nonmetamorphic proterozoic carbonates [39]; VC = vein carbonate [40].…”

Section: Stable Isotopic Results: Fluid and Rockmentioning

confidence: 99%

Dynamic Metasomatism: Stable Isotopes, Fluid Evolution, and Deformation of Albitite and Scapolite Metagabbro (Bamble Lithotectonic Domain, South Norway)

et al. 2018

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New stable isotopic data from mineral separates of albite, scapolite, amphibole, quartz, and calcite of metasomatic rocks (Bamble lithotectonic domain) give increased knowledge on fluid type, source, and evolution during metamorphism. Albite from a variety of albitites gives18 O SMOW values of 5.1-11.1‰, while quartz from clinopyroxene-bearing albitite gives 11.5-11.6‰. 18 O SMOW values for calcite samples varies between 3.4 and 12.4‰ and shows more consistent 13 C values of −4.6 to −6.0‰. Amphibole from scapolite metagabbro yields a 18 O SMOW value of 4.3 to 6.7‰ and D SMOW value of −84 to −50‰, while the scapolite gives 18 O SMOW values in the range of 7.4 to 10.6‰. These results support the interpretation that the original magmatic rocks were metasomatised by seawater solutions with a possible involvement from magmatic fluids. Scapolitisation and albitisation led to contrasting chemical evolution with respect to elements like P, Ti, V, Fe, and halogens. The halogens deposited as Cl-scapolite were dissolved by albitisation fluid and reused as a ligand for metal transport. Many of the metal deposits in the Bamble lithotectonic domain, including Fe-ores, rutile, and apatite deposits formed during metasomatism. Brittle to ductile deformation concurrent with metasomatic infiltration illustrates the dynamics and importance of metasomatic processes during crustal evolution.

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Precambrian sedimentary carbonates: carbon and oxygen isotope geochemistry and implications for the terrestrial oxygen budget

Cited by 319 publications

References 35 publications

Antiquity of the biological sulphur cycle: evidence from sulphur and carbon isotopes in 2700 million–year–old rocks of the Belingwe Belt, Zimbabwe

Antiquity of the biological sulphur cycle: evidence from sulphur and carbon isotopes in 2700 million–year–old rocks of the Belingwe Belt, Zimbabwe

Lab on a Chip

Dynamic Metasomatism: Stable Isotopes, Fluid Evolution, and Deformation of Albitite and Scapolite Metagabbro (Bamble Lithotectonic Domain, South Norway)

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