石油与天然气地质 ›› 1985, Vol. 6 ›› Issue (2): 211-219.doi: 10.11743/ogg19850217

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陆壳碰撞的一种模式与准噶尔盆地西北缘的油气勘探

伍致中   

  1. 新疆石油管理局
  • 收稿日期:1983-10-25 出版日期:1985-06-25 发布日期:2012-01-16

A MODEL OF CONTINENTAL CRUST COLLISION IN RELATION TO OIL EXPLORATION IN THE NORTHWESTERN MARGIN OF JUNGGAR BASIN

Wu Zhizhong   

  1. Xinjiang Petroleum Administration
  • Received:1983-10-25 Online:1985-06-25 Published:2012-01-16

摘要:

关于陆壳碰撞的类型和形式,国内外学者都有很多的研究和报道。看来,他们的分类原则、方法、名称不尽相同,但都注意到了稳定陆块与造山带之间的陆壳碰撞。如 W.R.迪肯森的造山带与克拉通前陆盆地的相互作用;A.W.巴利的 A-俯冲带;许靖华的具有盖层的原地刚性基底与超叠壳楔之间的冲撞作用等等。

Abstract:

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 HL1,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.