Abstract
A survey of stable isotope ratios in sediments spanning the Permian-Triassic boundary in East Greenland shows Upper Permian evaporites to have b34S = + 10.6 ± 1.6%o and limestones to have b13Cmb = +4.5 ± 0.4%o, in conformity with similar values from probable correlative formations in Europe and North America. Most values of both isotopes in Triassic formations are lower and scattered, apparently reflecting varying inputs of non-marine waters including the oxidative erosion of isotopically light sulfur. This transition in the East Greenland section has obscured any clear detection of chemical events recorded elsewhere: a drop in marine b13C.,.,b near the Penman-Triassic boundary, and a sharp rise in b34S,1t in latest Scythian time.
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