Precambrian solution photochemistry, inverse segregation, and banded iron formations
@article{Cairnssmith1978PrecambrianSP, title={Precambrian solution photochemistry, inverse segregation, and banded iron formations}, author={A. G. Cairns-smith}, journal={Nature}, year={1978}, volume={276}, pages={807-808} }
SOLAR radiation on an early Precambrian sea would generate short-lived excited species near the surface of the water. Many of the species would be powerful oxidising or reducing agents. Despite back-reactions, net reducing power would be lost to the atmosphere. This effect would be the opposite of present day photosynthesis and can be termed ‘inverse segregation’. Its possible relevance to banded iron formation is discussed here.
186 Citations
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References
SHOWING 1-10 OF 18 REFERENCES
Early Precambrian oxygen: a case against photosynthesis
- GeologyNature
- 1978
Recent biological–biochemical and geological–geochemical data are inconsistent with the currently accepted view that early Precambrian fossil microbiotas are evidence of oxygen-generating…
Paleoecological Significance of the Banded Iron-Formation
- Environmental Science, Geology
- 1973
Banded iron-formation (BIF) is rare in rocks younger than about 2 aeons (years X 10 9 ). It records a major episode of chemical iron sedimentation, however, at about 2 to 2.1 aeons, just before the…
Conversion of Solvated Electrons into Hydrogen Atoms in the Photo‐ and Radiation Chemistry of Aqueous Solutions
- Chemistry
- 1962
Radiation chemical and photochemical experiments are reported which show that the conversion of solvated electrons to H atoms is not specific to the H3O+ ion. Proton donors in general may react in…
Ages of Precambrian Banded Iron-Formations
- Geology
- 1973
Considerable progress has been made in the radiometric dating of Precambrian iron-formations, but the age of relatively few is known precisely. Early Precambrian or Archean deposits, older than 2,600…
Photochemical Reactions connected with the Quenching of Fluorescence of Dyestuffs by Ferrous Ions in Solution
- Chemistry, PhysicsNature
- 1935
IT has been found recently that ferrous ions exert a strong quenching effect on different fluorescent dyestuffs in solution1. According to previous theoretical discussions2, in the elementary process…
Chemical events on the primitive Earth.
- GeologyProceedings of the National Academy of Sciences of the United States of America
- 1966
The hypothesis of an early methane-ammonia atmosphere is found to be without solid foundation and indeed is contraindicated, and arguments concerning feasible components support the view that amino acids and proteins preceded sugars and nucleic acids.
Atmospheric and hydrospheric evolution on the primitive earth. Both secular accretion and biological and geochemical processes have affected earth's volatile envelope.
- Geology, PhysicsScience
- 1968
Biospheric, hydrospheric, lithospheric and atmospheric evolution on primitive earth, discussing secular accretion and biological and geochemical processes effect on volatile envelope
Early Archaean Age for the Isua Iron Formation, West Greenland
- GeologyNature
- 1973
SOME 150 km north-east of Godthaab, on the edge of the inland ice cap, a refolded syncline of mainly basic rocks containing banded ironstones and other rocks of supracrustal origin is enclosed by…
Polymeric film precursors in the homogeneous crystallisation of some metal oxides
- ChemistryNature
- 1974
WE have already reported1,2 the occurrence of two-dimensional polymeric structures prior to precipitation in the system ZrOCl2 (aqueous solution)→ZrO2 (monoclinic). Here we show that similar thin…
Varve Cycles in the Weeli Wolli Formation of the Precambrian Hamersley Group, Western Australia
- Geology
- 1973
Chert and chert-matrix bands, internal striping, comparison with Dales Gorge Member of Brockman Iron Formation