Relationship between tectonic evolution and hydrocarbon in the foreland of the Longmen mountains

After going through intense detachment and plate collision, the Late Proterozoic plate sutures and Paleozoic aulacogens evolved into a series of overthrusts which were thrusted onto the craton, forming the Indosinian Longmen mountains. Continental marginal slope which had dipped westward for a long time was changed into the Sichuan foreland basin. Superimposed orogenic movements and related migration of sedimentary basins controlled the generation, migration, accumulation and disappearance of hydrocarbons. Subsequently, rock overtightening and the formation of the Himalayas led to the unique hydrocarbon characters at the foreland of the Longmen mountains.