Azmy, Karem and Misi, Aroldo and Sanches, Andreia L. and Kaufman, Alan J. and Veizer, Ján and Powis, Kelli and Teixeira, João Batista G. (2006) δ13C and 87Sr/86Sr of phosphorites from the São Francisco Craton, Brazil: phosphogenesis and correlations. In: South American Symposium on Isotope Geology V, April 21–24, Punta del Este, Uruguay.
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Available under License Creative Commons Attribution Non-commercial.
Phosphate accumulations in the São Francisco Craton are found in both the cratonic non-deformed strata, and in the Brasilia Fold Belt, to the west of the cratonic area. The deposits are stratigraphycally controlled and their formation is probably related to a widespread episode during the terminal Proterozoic Era (Cook and Shergold, 1986). These authors suggested that major phosphogenic event followed a period of glaciation, which “could produce a large volume of cold, nutrient-rich water, resulting in a major expansion of organic productivity in the photic zone following the glacial period”.
|Item Type:||Conference or Workshop Item (Paper)|
|Keywords:||C and Sr isotopes, phosphorites, Neoproterozoic, phosphogenesis, São Francisco Craton|
|Department(s):||Science, Faculty of > Earth Sciences|
|Geographic Location:||São Francisco Craton, Brazil|
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