摘要
现在不少人提出贵州存在大面积的推覆构造,但要真正搞清它却非一朝一夕能办到的,这需要靠不断的积累资料。本文可供对此有兴趣的读者参考、讨论。
The nappe tectonics in Southeastern Guizhou is part of ' Eastern Guizhou Thrust System'. This area,controlled by the faults on both sides,became a nappe tectonics region which was surrounded and' limited by faults on all the three sides. There are a lot of evidences to support the above-mentioned point of view. Many factors,such as arcuate structural zones bending toward west,thrust planes dipping toward east and unidirectional zoning of strata,etc. show that the nappe was moved from east to west.
The nappe tectonics,formed in the period of Yanshanian movement,mainly belonges to horizontal compression and shorting type. The development of stepped thrust resulted in the thickening of strata and the forming of box folds. According to a preliminary study, there are three important detachment layers:S2+3,2+3and 1-2.
Key words-nappe tectonics; stepped thrust ; detachment layers ;hemianticlinorium; Southeastern Guizhou.
出处
《贵州地质》
1990年第3期271-279,共9页
Guizhou Geology
