Advances in Research on Foreland Basin

Abstract

Abstract: A foreland basin is defined as a sedimentary basin deposited between frontal margin of orogenic belt and its adjacent craton. It can be divided into four structural elements such as wedge-top, foredeep, forebulge and back-bulge depo-zones. There are three kinds of foreland basins classified in terms of origin and location: peripheral foreland basin, retroarc foreland basin and regenerated foreland basin. The evolution of it is a dynamic process with the feature of progressive development. A foreland basin mainly undergoes common processes of topographic load, subduction load, dynamic plate load, thus resulting in lithosphere flexure. A foreland basin always occurs with compressional orogenic belt in pairs, showing distinct coupling and complementary nature. In a foreland basin, the most favorable hydrocarbon accumulation is the following structural locations: faulted-extensional anticline and decollement anticline on thrust faults in floor of double thrust structural zone, fault expanding fold of buried thrust fault front and “triangular domain" included by passive top double thrust structural zones.

Key words: foreland basin, peripheral foreland basin, retroarc foreland basin, regenerated foreland basin

CLC Number:

TE111

WU Yang-yang, FENG Jun. Advances in Research on Foreland Basin[J]. Xinjiang Petroleum Geology, 2003, 24(1): 87-91+0.

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