现代地质2011，Vol.25Issue(3)：503-509,7.
内蒙古白乃庙地区白云鄂博群震积岩的发现及其构造意义
Seismites from Bayan Obo Group in the Bainaimiao Area of Inner Mongolia and Their Tectonic Implications
摘要
Abstract
The Middle-Upper Proterozoic Bayan Obo Group is located at the northern margin of the North China Craton, and was deposited under intra-plate tectonic setting of extension in Middle-Late Proterozoic. From the Halahuogete Formation of Bayan Obo Group in the Bainaimiao area of Inner Mongolia, the authors discovered a set of structures resulted from soft-sediment deformation for the first time. They occur within the crystalline limestone at the lower section of this group, and include remobilisation breccias, synsedimentary folds, fault-grading, molar tooth and so on. These characteristics demonstrate they belong to the seismites. According to further comparisons between the Bayan Obo Group and the contemporary Sailinhudong Group nearby, we found they exhibit similar features of soft-sediment deformation as well as the same age of formation. This discovery of the seismites from Bayan Obo Group indicates the northern margin of the North China Craton was undergoing a rapid and intense extension and divergence in Middle-Late Proterozoic, which provides fundamental observations for further studies on tectonic evolution of the North China Craton.关键词
白云鄂博群/软沉积变形/震积岩/内蒙古Key words
Bayan Obo Group/ soft-sediment deformation/ seismite/ Inner Mongolia分类
天文与地球科学引用本文复制引用
矫德阳,崔晓,苏宏伟..内蒙古白乃庙地区白云鄂博群震积岩的发现及其构造意义[J].现代地质,2011,25(3):503-509,7.基金项目
国土资源部中国地质调查局"华北地区基础地质及数据更新项目"(1212010510506,1212010811001) （1212010510506,1212010811001）
内蒙古自治区地质勘查基金项目(KD78). （KD78）
