Carbon isotope evidence for the stepwise oxidation of the Proterozoic environment

@article{Marais1992CarbonIE,
  title={Carbon isotope evidence for the stepwise oxidation of the Proterozoic environment},
  author={D. D. Marais and H. Strauss and R. Summons and J. Hayes},
  journal={Nature},
  year={1992},
  volume={359},
  pages={605-609}
}
The oxidation of the Earth's crust and the increase in atmospheric oxygen early in Earth history have been linked to the accumulation of reduced carbon in sedimentary rocks. Trends in the carbon isotope composition of sedimentary organic carbon and carbonate show that during the Proterozoic aeon (2.5–0.54 Gyr ago) the organic carbon reservoir grew in size, relative to the carbonate reservoir. This increase, and the concomitant release of oxidizing power in the environment, occurred mostly… Expand
Late Proterozoic rise in atmospheric oxygen concentration inferred from phylogenetic and sulphur-isotope studies
The evolution of non-photosynthetic sulphide-oxidizing bacteria was contemporaneous with a large shift in the isotopic composition of biogenic sedimentary sulphides between 0.64 and 1.05 billionExpand
Isotopes, ice ages, and terminal Proterozoic earth history.
Detailed correlations of ancient glacial deposits, based on temporal records of carbon and strontium isotopes in seawater, indicate four (and perhaps five) discrete ice ages in the terminalExpand
The carbon isotope biogeochemistry of microbial mats
Studies of the distribution of stable carbon isotopes within ecosystems frequently offer useful insights into the structure and function of those ecosystems. The isotopic composition of the organicExpand
The Palaeoproterozoic perturbation of the Global Carbon Cycle : the Lomagundi-Jatuli Isotopic Event
On Earth, carbon cycles through the land, ocean, atmosphere, living and dead biomass and the planet’s interior. The global carbon cycle can be divided into the tectonically driven geological cycleExpand
Tectonic control of the crustal organic carbon reservoir during the Precambrian
Carbon isotopic trends indicate that the crustal reservoir of reduced, organic carbon increased during the Proterozoic, particularly during periods of widespread continental rifting and orogeny. NoExpand
Isotopic evolution of the biogeochemical carbon cycle during the Proterozoic Eon
Abstract Time-related changes in the Proterozoic sedimentary isotopic record of organic carbon and carbonates are consistent with the following: (1) an increase in the oxidation state of theExpand
Carbon isotopes and the oldest record of life: potential and limits
The currently available sedimentary carbon isotope record goes back to 3.85 Ga and conveys a remarkably consistent isotopic signal of biological carbon fixation based on the bias for light carbonExpand
Atmospheric oxygen regulation at low Proterozoic levels by incomplete oxidative weathering of sedimentary organic carbon
It is unclear why atmospheric oxygen remained trapped at low levels for more than 1.5 billion years following the Paleoproterozoic Great Oxidation Event. Here, we use models for erosion, weatheringExpand
Carbon isotopic evolution of the terminal Neoproterozoic and early Cambrian: Evidence from the Yangtze Platform, South China
Profound geotectonic, climatic and biological changes occurred during the terminal Neoproterozoic and its transition into the Early Cambrian. These changes are reflected in temporal variations of theExpand
Proterozoic Atmospheric Oxygen
This article is concerned with the evolution of atmospheric oxygen concentrations through the Proterozoic Eon. In particular, this article will seek to place the history of atmospheric oxygenationExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 41 REFERENCES
A 3,800-million-year isotopic record of life from carbon in sedimentary rocks
An increased ratio of 12C to 13C, an indicator of the principal carbon-fixing reaction of photosynthesis, is found in sedimentary organic matter dating back to almost four thousand million yearsExpand
Content and Isotopic Composition of Reduced Carbon in Sediments
Reduced carbon, commonly a residuum of biological activity, has been a conspicuous constituent of sedimentary rocks since the start of the rock record 3.8 × 109 yr ago. The 36,000 Corg assaysExpand
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
Evidence from Lewisian limestones for isotopically heavy carbon in two-thousand-million-year-old sea water
A number of 2,000-million-year-old marbles have extraordinarily heavy carbon isotope signatures (δ 13C ≈+12%0, PDB) 1,2, suggesting that there was a worldwide excursion in the carbon isotopeExpand
Microbial mats, stromatolites and the rise of oxygen in the Precambrian atmosphere.
Microbial mats are stratified communities that develop within the environmental microgradients established at the interfaces of water and solid substrates (Cohen, 1989). Stromatolites, the lithifiedExpand
Chemical cycles in the evolution of the earth
Cyclic Processes in Geology, a Historical Sketch Geochemical Cycles: The Continental Crust and the Oceans Geochemical Cycles of Atmospheric Gases Interactions of Geochemical Cycles with the MantleExpand
Sedimentary cycling and environmental change in the Late Proterozoic: Evidence from stable and radiogenic isotopes
We report C, Sr, and O isotopic as well as selected major and trace element data from Late Proterozoic (ca. 540–900 Ma) marine carbonates in three widely separated basins. The isotopic and elementalExpand
Metamorphic Alteration of Carbon Isotopic Composition in Ancient Sedimentary Organic Matter: New Evidence from Australia and South Africa
Insoluble organic matter (kerogen) was isolated from a suite of 23 marine shales and carbonate rocks of early Proterozoic to Middle Cambrian age from Australia. The stable carbon isotopicExpand
Productivity, sedimentation rate, and sedimentary organic matter in the oceans—I. Organic carbon preservation
Comparison of rates of accumulation of organic carbon in surface marine sediments from the central North Pacific, the continental margins off northwest Africa, northwest and southwest America, theExpand
87Sr/86Sr in Precambrian carbonates as an index of crustal evolution
The Sr isotopic composition of ‘seawater’, as measured on carbonate rocks, shows a composite pattern during geologic history. All known Archaean data are compatible with contemporaneous upper mantleExpand
...
1
2
3
4
5
...