摘要
在申扎地区发现了较为完整的寒武纪地层和奥陶系与寒武系之间的"泛非运动"角度不整合。这是迄今为止青藏高原南部发现的唯一确切的寒武纪地层,不但进一步丰富和健全了青藏高原的地层系统,而且也是在青藏高原和周边发现的唯一的下奥陶统与寒武系"泛非运动"角度不整合界面。通过对申扎"泛非运动"界面的研究,可以准确界定"泛非运动"的时限及其动力学过程,也是研究"泛非运动"之前冈瓦纳大陆北缘沉积作用不可替代的标本,对青藏高原构造演化研究具有重要、深远的意义。
A Pan-African orogenic unconformity between Cambrian and Ordovician and relatively complete Cambrian deposits were discovered in Xainza area,which is the only confessed Cambrian system in southern Qinghai-Tibet Plateau so far.This new discovery is not only an enrichment and complementarity of the stratigraphic system of Qinghai-Tibet Plateau,but also the only Pan-African orogenic unconformity between Cambrian and Ordovician in Qinghai-Tibet Plateau and its surrounding areas.The research on it can accurately determine the time limit of Pan-African movement and its geodynamic evolvement.This unconformity provides an unique sample to the study of the sedimentary process in northern Gondwana before Pan-African movement and has great and far-reaching significances to the research of the tectonic evolvement of Qinghai-Tibet Plateau.
出处
《地质通报》
CAS
CSCD
北大核心
2010年第12期1733-1736,共4页
Geological Bulletin of China
基金
国家自然科学基金项目(批准号:40872146、41072166)
中国地质调查局项目(编号:基[2010]矿评02-03-04、02-03-07)资助
关键词
青藏高原
申扎地区
寒武系
泛非运动
造山不整合
Qinghai-Tibet Plateau
Xainza area
Cambrian System
Pan-African movement
orogenic unconformity
