关于雪峰隆起带西缘推覆构造问题的讨论

A Discussion on the Western Edge Nappe Structure of the Snow Peak Upheaval Zone

雪峰隆起带西缘是否存在大的推覆构造,是80年代以来地质学者热烈争论的一个问题。本文依据丰富的地面地质资料和深部物探资料,从地面地质构造特征、早古代沉积相带展布、深部物探资料(主要是可控震源地震资料和大地电磁测深资料)的对比分析、雪峰隆起带所处的大地构造位置及其演化过程等几个方面,论证了该区并不存在大的推覆构造,雪峰隆起带不会是外来的推覆体。

Whether a large nappe structure exists on the western edge of the snow peak upheaval zone has remained argued heatedly by geologists since 1980's. According to a great number of ground geological data, deep physical exploration data, comparative analysis of ground geological structure features, distribution of ancient sedimentary facies zones, deep physical exploration data (mainly earthquake data of controllable centrum and magnetotel-luric deep sounding data), and the tectonic position of the snow peak upheaval zone and its evolution process, etc. , this paper proves that no large nappe structure exists in this area and the snow peak upheaval zone is not an outside nappe.