藏北龙木错东部三岔口地区下奥陶统与泥盆系的不整合界面

收稿日期: 2005-01-05

修回日期: 2005-11-23

刊出日期: 2006-01-15

Unconformity between the Lower Ordovician and Devonian in the Sanchakou area in the eastern part of the Lungmu Co, northern Tibet, China

Received Date: 05 January 2005

Revised Date: 23 November 2005

Publish Date: 15 January 2006

摘要: 在北羌塘三岔口一带采获丰富的腕足类：汉伯矮正形贝及比较种Nanorthis cf.hamburgensis（Walcott）。建立了早奥陶世岩石地层单位——三岔口组，是羌塘地区目前有化石控制的最低层位。中、晚泥盆世拉竹龙组与下伏志留系、奥陶系不整合接触关系的进一步确定，证明了羌北-昌都板块与扬子板块的亲缘性，为羌北-昌都板块属性的确定提供了重要证据。
- 早奥陶世地层泥盆纪地层不整合北羌塘西藏
- Early Ordovician strata; Devonian strata; unconformity; northem Qiangtang; Tibet