摘要
地层方面,将测区地层划分为冈底斯腾冲地层区和班公错 怒江结合带,班公湖 怒江结合带中又划分出聂荣微地块和觉翁 余拉山 下秋卡混杂带两个小区;按变质岩调查方法解体了聂荣地块;对原大面积分布的拉贡塘组进行了有效的解体;新建立嘎加组;恢复了郭曲群;将木嘎岗日岩群解体出3个岩组。岩石方面,在测区南部新发现了一套晚二叠世—早三叠世蛇绿岩。构造方面,构造单元表现为各组 下秋卡结合带和桑雄那曲 麦地卡板片的构造格局;新发现达仁乡夺列蛇绿岩体。
The developments in stratigraphy are involved in the division of the surveyed area into the Gangdise-Nyainqentanglha-Tengchong stratigraphic province and Bangong-Nujiang suture zone; subdivision of the Bangong-Nujiang suture zone into the Nyainrong microcontinent and Jueweng-Yulashan-Xagquka mélange zone; redivision of the Nyainrong microcontinent and Lagongtang Formation; re-establishment of the Gajia Formation; reconstruction of the Guoqu Group; disintegration of the Muggar Kangri Group into three group complexes. Petrologically, new discovery includes a suite of the Late Permian-Early Triassic ophiolites in the southern part of the surveyed area and ophiolites in Duolie, Dagring Village. Tectonically, the tectonic units consist of the Gezu-Xagquka suture zone and Sangxung-Nagqu-Midika slab in the surveyed area.
出处
《沉积与特提斯地质》
CAS
CSCD
2005年第1期91-95,共5页
Sedimentary Geology and Tethyan Geology
关键词
1:25万
地质调查
那曲县幅
成果与进展
藏北青南
1∶250 000
gelogical survey
Nagqu Sheet
development
northern Xizang
southern Qinghai
