班公湖-怒江结合带中段上三叠统确哈拉群与下伏岩系角度不整合关系的发现及意义

Discovery of an uniformity between the Upper Triassic Quehala Group and its underlying rock series in the central segment of the Bangong Co-Nujiang junction zone, Tibet, China

摘要: 在位于班公湖-怒江结合带中段的西藏班戈县白拉乡拉纳沟-带,首次发现上三叠统确哈拉群与下伏岩系呈角度不整合接触.该接触关系的发现,证实在班公湖-怒江结合带内有古特提斯蛇绿岩的存在,说明以班公湖-怒江结合带为代表的新特提斯域是在古特提斯域基础上继承和发展起来的.

Abstract: An unconformity was first found between the Upper Triassic Quehala Group and its underlying rock series in the Lanagou area, Baila Township, Baingoin County, Tibet, in the central segment of the Bangong Co-Nujiang junction zone. The finding of this contact relationship confirms that Paleo-Tethyan ophiolites exist inside the Bangong Co-Nujiang junction zone and suggests that the Neo-Tethys domain represented by the Bangong Co-Nujiang junction zone inherited the Paleo-Tethys domain and developed on the basis of the Paleo-Tethys.