Unusual biomarker maturation ratio changes through the oil window, a consequence of varied thermal history |
| |
| Authors: | Christopher P N Davies |
| |
| Abstract: | Saturated and aromatic biomarker ratios continue to change systematically through the oil window and into the gas-condensate window to high vitrinite reflectances (Ro = 1.16%) in mature marine and lacustrine Mesozoic clastic samples from a South African basin. Two of the ratios reverse above Ro = 0.9%. These unusual maturation effects result from isolated periods of high rates of maturation increase. The basin cooled regionally after the break-up of Gondwana but high heating rates prevailed during the late Cretaceous-early Tertiary, as Africa moved across a hotspot, and again in the late Tertiary as a result of a possible hotspot and hydrothermal event. |
| |
| Keywords: | Biomarkers Crude petroleum Vitrinite reflectance Maturation parameters |
| 本文献已被 ScienceDirect 等数据库收录！ |
