陆内前陆盆地的复合动力演化研究——以库车陆内前陆盆地为例

THE COMPOUND DYNAMIC EVOLUTION OF INTRACONTINENTAL FOR ELAND BASIN--ANEXAMPLE FROM THE KUCHE FORELAND BASIN IN XINJIANG

陆内前陆盆地是我国西部广泛发育的一种盆地类型,它的发育是在远离洋陆碰撞俯冲带的大陆内部的“盆”“山”耦合过程,此“盆”“山”耦合动力演化过程的受控因素是极其复杂的。本文从中国大地构造的复杂性入手,分析了陆内前陆盆地动力演化过程受控因素类型:即多期构造作用综合应力场、A型俯冲作用、岩浆作用、热膨胀作用、重力滑动作用、地壳厚度影响、差异压力影响以及拆沉作用造成的回弹等,对这些作用因素的影响机制以及联合作用进行了讨论,并以库车陆内前陆盆地的动力演化为例进行了分析。这些影响因素的联合作用对动力演化过程的影响不容忽视,只有同时考虑这些因素才能更好的认识其动力学机制和发展过程,但在联合作用的研究方面程度较低,因此探讨这些因素对陆内前陆盆地动力演化过程的联合作用较有意义。

Intracontinental foreland basin is a kind of abroad developmental basin in the west of our country, it s development is an orogeny and coupled basin developing process in the interior of the continent which is far away from the collision subduction zone, and the controlled factor of the process is extremely complicated. This paper starts with the complexity of the tectonic of our country, and analyse the controlled factor's types of the intracontinental foreland basin' s compound dynamic evolution process: multistage tectonics' compound stress field、the effect of A subduction、 the magmatism、the thermal dilatation、 the gravitational sliding、the effect of inflation、the effect of difference compressive force and the rebound action due to the effect of dismantle sink, etc. We talk about the influence mechanism and the combined action of the influencing factor, at the same time, we take the Kuche intracontinental foreland basin as an example analyzing the compound dynamic evolution process. The influence on the evolution process by the associative action of these factors above can not be ignored. We may know the dynamic mechanism and the evolution process well only when we think about these factors at the same time. But less consideration was given to the associative action privously , so it is very consequent to research the influence on the evolution process by the associative action of these factors above.