内蒙古东乌珠穆沁旗满都胡宝拉格地区早—中二叠世华夏植物群的发现及地质意义

Discovery of Early-Middle Permian cathaysian flora in Manduhubaolage area, Dong Ujimqin Qi, Inner Mongolia, China and its geological significance

摘要: 内蒙古东乌珠穆沁旗满都胡宝拉格地区位于贺根山北东42°方向约240km处。在该地区首次发现了早—中二叠世地层（P1-2），其中富含华夏植物群化石，已鉴定出7属11种，可与华北板块同期植物群进行对比，时代确定为早—中二叠世。该发现为进一步认识西伯利亚与华北板块之间缝合线的位置和时间提供了重要的科学依据。据此认为两大板块缝合的时间应在早二叠世之前。

Abstract: Manduhubaolage of Dong Ujimqin Qi，Inner Mongolia，is located in the north of Hegenshan about 240km toward to 42°. We found early-middle Permian stratum which contains cathaysian flora first time. We have identified 7 genus 11 species in the cathaysian flora. They can compare with the floras which were well studied in North China plate, and their times could be identified as early-middle Permian. This discovery enlightened us to consider the questions that are the suture place and the collision time of Siberia and North China plate. The collision time of the two plates should be earlier than early Permian.