摘要
塔里木盆地经历了多期构造运动,造成沉积间断,继而形成一系列重大的地层不整合面.塔中地区奥陶系主要发育有两个大型的不整合面T47和T07,它们受构造和海平面的共同控制,暴露时间长,规模大,在区域上控制了两期强烈的风化壳岩溶事件的发育.第一期位于下奥陶统顶部不整合面之下,第二期位于上奥陶统顶部不整合面之下.这两期岩溶特征因其上覆不整合面的特征不同而不同.不整合面对岩溶发育的控制主要体现在两个方面,一是不整合面形态对分化壳岩溶发育范围的控制,二是不整合面的强度级别对分化壳岩溶发育深度的控制.
The Tarim basin has experienced periods of structure movements and developed a series of large stratigraphic unconformities. The Ordovician has two large unconformity surfaces T7^4 and T7^6 in central of Tarim, which are predominated by structure movements and sea level changes. Being exposed for a long time, the development of two periods regolith karst is locally controlled. The first period karst locates under the unconformity top of down-Ordovician, the second locates under the unconformity top of up-Ordovician. The character of two periods＇ darst are different for their different unconformities. The effects of the unconformity surface on karst mainly include two aspects： one is the configuration of unconformities which controls the development scale of regolith karst, another is the intensity of unconformities which controls the development depth of regolith karst.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第8期1122-1127,共6页
Journal of Tongji University:Natural Science
关键词
塔中地区
岩溶
不整合面
central of tarim area
karst
unconformable surface
作者简介
陈新军（1975-），男，新疆哈密人，讲师，工学博士．E—mail：chenxj2008@sina.com
