摘要
滇西北地区新生代逆冲推覆构造较为发育,从西到东可分出走向NS、相互平行的4带:澜沧江带,云岭带,石钟山带和剑川 洱源带。其中,澜沧江带与云岭带组成对冲格局,云岭带又与石钟山带组成反冲格局,石钟山带与剑川 洱源带又组成对冲格局。参与逆冲推覆的地层主要是中生代三叠系、侏罗系、白垩系及新生代云龙组、宝相寺组,推覆体由石炭系、二叠系、上三叠统岩石组成。逆冲推覆时间为喜马拉雅期。
In the northwest Yunnan, the Cenozoic thrusting nappe is well developed, which can be divided into 4 zones with south-northward parallel strike, ie Lancangjiang, Yunling, Shizhongshan and Jianchuan-Eryuan zones from west to east. The Lancangjiang zone and Yunling zone form a syn-thrusting pattern, whereas the latter and Shizhongshan zone form an anti-thrusting pattern. And the Shizhongshan zone and Jianchuan-Eryuan zone form a syn-thrusting pattern. The strata involved in the thrusting nappe movement are mainly Triassic, Jurassic, Cretaceous and Cenozoic Yunlong Formation, Baoxiangsi Formation. The nappe is composed by Carboniferous, Permian and late Triassic rocks and the age of the thrusting nappe movement is Himalayan.
出处
《云南地质》
2004年第2期154-163,共10页
Yunnan Geology
关键词
逆冲推覆构造
时空特点
新生代
滇西北
Thrusting Nappe
Time-Space Characteristics
Cenozoic
Northwest Yunnan
