APPLICATION OF C, O AND Sr ISOTOPE COMPOSITION OF CARBONATES IN THE RESEARCH OF PALEOCLIMATE AND PALEOOCEANIC ENVIRONMENT

Abstract

Research on C,O,Sr isotopes of carbonate rocks is one of the geochemical tracers and provides quantitative evidences for paleo-environment and paleoclimate change. The research results reveal that high δ(~(13)C) represents rise of the sea level and high rate of organic carbon burry, the low δ(~(13)C) the drop of sea level and the organic carbon burry rate; ~(87)Sr/~(86)Sr ratio is negatively correlated to eustatic change of sea level, δ(~(18)C) value is one of the signoture to be trsed to indicate if the carbonate rock was exposed to late reworke. Generally, (Mn/Sr)10, δ(~(18)O_(POB))-10×10~(-3), impositively correlated δ(~(13)C) and δ(~(18)O) are the prerequisites for C,O,Sr isotopes to trace paleo-climate.