天祝盆地边缘断层的全新世活动及盆地的演化与形成

HOLOCENE ACTIVITY OF FAULTS AROUND TRE TIANZHU BASIN AND EVOLUTIONARY PROCESS OF THE BASIN

摘要:

根据作者1/50,000活断层地质填图的资料,讨论了天祝盆地内断层的全新世活动及盆地的形成与演化历史。结果表明,天祝盆地内断层的全新世活动强烈,上窑洞沟深槽揭示3980±50aB.P.曾发生过一次古地震事件,天祝盆地是一个典型的拉分盆地,其形成及演化与断裂活动密切相关.

Abstract:

In this paper, based on the 1: 50, 000 active fault mapping, the Holocene activity of faults in the Tianzhu basin and evolutionary process of the basin are discussed. The results show that the faults are very active in Holocene. There was an earthquake in 3980±50 a B.P.. Tianzhu basin is a typical pull-apart basin and its forming and evolution are closely related with the active faults.