Biomarker characteristics of source rocks in Shangkuli formation of Labudalin Basin, northeastern Inner Mongolia

Key words:  Labudalin Basin  Shangkuli formation  source rocks  biomariters

Abstract:

The depositional environment, biogenetic derivation and maturity of source rocks in Shangkuli formation in Labudalin Basin were discussed by using the geochemical analysis technique of GC and GC-MS. TTie results show that the abundance organic matter of surce rock in the research area is rather high，and the major type of organic matter is type U ] ? The depositional environment, maturity and biogenetic derivation of organic matter for source rocks are different in different area of the basin. The organic matter of source rocks near Shangwuergen formed in strong reduction environment with sail deep water, the source inputs mainly came from mixed-source of plankton and hydrobiontic algae，and the thermal evolution reached maturation stage. The organic matter of source rocks near Shangkuli formed in weak reduction to reduction environment with freshwater-light salt water, its hydrocarbon came from mixed-source of organics, and the thermal evolution reached low maturation stage.