The model of continental collision dealt with in this paper includs mainly three parts:1)the overriding slices of crust(the main nappe);2)the decol-lement wedge(subordinate neppe);and 3)the subducted crust.These three parts comprise a complete series of nappe structures.Along a large collision zone

one can usually find several nappe structures passing to each other with transi-tional shear belts in between.An arcuate convexed front is quite characteristic of each nappe.According to the above model

the author has pointed out three promissing areas for oil prospecting:1)the fault-folded uplift zone related to the advan-ced front of the subductcd crust(FL);2)the fault-folded uplift zone of thedecollement wedge front(HL)and 3)continental cap that was undisturbed dur-ing continental collision(G).The first zone is most promising in oil pros-pecting due to its high thermal evolution

favourable position and rich oilsource.The second zone is also prosperous

especially in the area HL

1

where the advanced front of the subducted crust is overlain by a nappe due to collision

and oil traps might be cut by the decoupling plane

thus leading to the mig-ration and accumulation of oil and gas in the fault-folded uplift zone of the decollement front. Nappe structures

such as Hala'alate and Chengjisihan nappe structures

and the related Baikouquan and Xiazijie transitional shear belts formed during con-tinental crust collision on northeastern margin of Junggar Basin

are studied.It is suggested that the most promising region in recent oil prospecting is theBaikouquan subarea of Baikouquan fault-folded uplift zone.