摘要
本文主要从镜质体光性异常出发，并结合共轭剪切节理探讨沅麻盆地中、后期的古应力史。通过对沅麻盆地东南缘12个煤矿采集到的煤样进行的镜质体光性异常及其盆地内共轭剪切节理的研究，发现沅麻盆地在其演化过程的中期（K2－E1）遭受了强烈的侧向（NW－SE向）挤压，盆地演化过程中的主体构造（NE－SW向）主要形成于此；晚期E2又遭受了较强烈的纵向（NE－SW向）挤压，使盆地派生出横向引张伸展，产生了一系列NE向小型正断层。
On the basis of the analysis of the vitrinite optical anomal as Well as the conjugate joint, the palaeo-stress history of the Yuanma basin has been studied. The studies indicate that, in the middle stage(K2- E1) of the evolution of the Yuanma basin, it was violently compressed lateraly by form (NW-SE), to form the main structare frame of the basin;and in the late stage (E2), compressed by a longitudinal force, thus producing a series of small NE-SW normal faults.2figs.,1tab.,6refs.
出处
《湘潭矿业学院学报》
1997年第1期36-42,共7页
Journal of Xiangtan Mining Institute
基金
中国科学院资助
关键词
沅麻盆地
古应力
镜质体
光性异常
共轭剪切
节理
Yuanma basin
Palaeo-stress
Vitrinite
Optical anomaly and conjugate joint
