摘要
三台坡岩组为哀牢山断裂南段新发现的一套构造混杂岩。在剖面大理岩化灰岩中采获牙形石,经鉴定时代为早石炭世。该套岩石为位于扬子准地台与唐古拉 昌都 兰坪 思茅褶皱系两个一级大地构造单元间的哀牢山断裂带上的构造混杂岩,至少经历4期变形变质。据原岩恢复和变质残余组构,具蛇绿岩套组合特征,断裂带应为板块俯冲带(缝合线)。三台坡组的发现,为研究哀牢山造山带南段地质发展演化提供了依据,填补哀牢山断裂带南段构造演化研究空白。
The Santaipo lithological association is a set of structural melange discovered recently. The Early Carboniferous conodont has been collected in the marbleized limestone. This set of rocks are the structural melange in the Ailaoshan fault zone between Yangzi paraplatform and Tanggula-Changdu-Lanping-Simao fold system, which experienced at least 4 periods of deformation-metamorphism. According to the protolith restoration and the metamorphic relict farbric, it is characterized by the ophiolite suite and the fault zone must be a plate subduction zone(suture). The discovery of Santaipo lithological association provides a base for the study of geological development and evolution of the south section of Ailaoshan orogenic zone.
出处
《云南地质》
2004年第3期287-303,共17页
Yunnan Geology
