New Discovery of Ca.38 Ma Ultramafic-mafic Dyke Swarms in the Mitizi Area,Northwestern Tibetan Plateau

• 作者: CHAO Wendi WANG Zuopeng LI Xiaojun ZHOU Yanlong
• 来源期刊: 地质学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: RESEARCH ADVANCES
• 页码范围: 1415-1417
• 页数: 3页
• 语种: 英文

摘要

Objective The Tibetan Plateau,located in the eastern part of the Alpine Himalayan tectonic domain,is the youngest and the most spectacular of all continent-continent collisional belts in the world(Zhang et al.,2007;Xu et al.,2011;Zhu et al.,2012).Over the past 20 years,Cenozoic potassic volcanic rocks and intermediate-felsic granitic plutons in the northwestern Tibetan Plateau have been extensively identified(Luo et al.,2006).However,there are no previous reports of Cenozoic ultramafic-mafic dykes in this region.Here we report the discovery of ca.38 Ma ultramafic-mafic dyke swarms in the Mitizi area,which provides important new information on Eocene mantle activity on and tectonic uplift of the Tibetan Plateau.