MECHANISM OF FORMATION OF DECOLLEMENT THRUST ZONE AND THE PROSPECT OF OIL-GAS IN KUCHE DEPRESSION IN NORTH TARIM BASIN

This paper describes detailedly the characteristics of decollement thrust zone both in plane and in section of Mesozoic-Cenozoic rocks in the Kuche depression in the south foreland North Tarim basin by an analysis of the geophysical and geological data available. A mechanism of the formation of the thrust zone is first put forward and is followed by a preliminary evaluation of the oil-gas resources. The fault bend folds behind the Qiulitake arc and the triangle zone and the salt domes in the front of the thrust stack are considered the likely oil traps.