特提斯带东段缅甸中-新生代构造演化、岩浆活动及成矿作用研究进展  

Research Progresses on the Mesozoic-Cenozoic Tectonic Evolution, Magmatism, and Metallogenesis in Myanmar in the Eastern Part of the Tethyan Belt

作　　者：李金祥 LI Jin-xiang(State Key Laboratory of Tibetan Plateau Earth System,Resources and Environment(TPESRE),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]中国科学院青藏高原研究所,青藏高原地球系统与资源环境国家重点实验室,北京100101

出　　处：《矿物岩石地球化学通报》2022年第1期57-69,共13页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(41941016,41490613,41972083);中国科学院先导专项A项目课题(XDA2007030101);第二次青藏高原科学考察研究项目课题(2019QZKK0708)。

摘　　要：缅甸是喜马拉雅造山带经东构造结东南向的延伸,是全面认识特提斯带造山带形成的关键地区,并且发育有重要的Cu-Au、Sn-W等金属矿产资源。本文对近几年有关特提斯东带构造演化和岩浆-成矿作用方面的研究成果进行了梳理和综述。西缅地体的白垩纪-渐新世岩浆岩及Cu-Au成矿作用与青藏高原冈底斯带可类比,而滇缅马苏地体的侏罗纪-始新世岩浆岩与Sn-W成矿带可以延伸到云南腾冲地区。缅甸中生代-新生代岩浆和金属成矿作用主要与中-新特提洋壳俯冲和随后50 Ma以来印度大陆岩石圈俯冲密切相关,且洋-陆岩石圈持续地俯冲控制了缅甸巨型Sn-W成矿带的形成。本文指出了存在的问题和需要进一步研究的方向,如50 Ma以来大洋-大陆岩石圈俯冲转换的时空变化、深部过程及成矿响应之间的耦合关系,西缅地体的构造属性,超大型Sn-W成矿带的成因机理等。Myanmar, southeastern extension of the Tibetan orogenic belt through the eastern Himalayan syntaxis, is the key area for comprehensively understanding on formation of the Tethyan orogenic belt. Many important Cu-Au and Sn-W ore deposits extensively occurred in Myanmar. According to research results in recent years, the Cretaceous-Oligocene magmatic rocks and Cu-Au mineralization in the West Burma terrane are analogous to those of the Gangdese belt in the Tibetan Plateau. The Jurassic-Eocene magmatic rocks and Sn-W metallogenic belt in the Sibumasu terrane are similar to those of the Tengchong area in Yunnan Province, China. The Jurassic-Eocene magmatism and metallogenesis in Myanmar were closely related to the subduction of the Meso-and Neo-Tethys oceanic crust and the subsequent subduction of Indian continental lithosphere since 50 Ma. The continuous subduction of oceanic and continental lithospheres likely controlled the formation of the giant Sn-W metallogenic belt in Myanmar. However, there are still many problems that should be further studied, such as the coupling relationship among spatial-temporal variation, deep processes, and metallogenesis during the transformation of subduction of oceanic-continental lithospheres, the tectonic affinity of the West Burma terrane, and the genetic mechanism of the giant Sn-W metallogenic belt.

关 键 词：特提斯带 缅甸 Cu-Au/Sn-W成矿作用 洋-陆岩石圈俯冲 

分 类 号：P611[天文地球—矿床学]