西藏高原东部江达构造带陆内裂谷演化与成矿作用  

Intracontinental rift evolution and mineralization of the Jiangda tectonic belt on the eastern margin of the Tibetan plateau,SW China

作　　者：董树义[1,2] 钟康惠[2] 唐菊兴[2,3] 顾雪祥[1] 冯军[4] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]成都理工大学地球科学学院,成都610059 [3]中国地质科学院矿产资源研究所,北京100037 [4]中国石油西南油气田公司,成都610081

出　　处：《成都理工大学学报（自然科学版）》2010年第4期475-480,共6页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家"973"项目(2002CB412607);国土资源大调查综合研究项目(200110200010);资源评价项目(20011020006)

摘　　要：运用地体-板块构造理论分析了江达构造带陆内裂谷期的演化过程。研究表明,作为昌都-思茅构造带的一个主要组成部分,江达构造带陆内裂谷发生于陆缘岩浆弧基础之上,发育典型的裂谷地貌、沉积建造和双峰式岩浆活动,其演化经历了火山地堑阶段(T3-J1)、陆内拗陷阶段(J2-K2)和走滑堑-垒构造系阶段(E1-E2)。成矿作用主要发生在火山地堑阶段和陆内拗陷阶段,火山地堑阶段以喷流沉积型矿床为主,陆内拗陷阶段形成夕卡岩型多金属矿床。The tectonic evolution of the intracontinental rift period about the Jiangda tectonic belt is discussed based on the terrane and plate tectonics theories. As a main portion of the Changdu-Simao tectonic zone, the Jiangda tectonic belt has experienced a similar intracontinental rifting history to its main tectonic zone. The intracontinental rifting of the Jiangda tectonic belt developed on the base of the continental margin arc. The intracontinental rift period of the Jiangda tectonic belt experienced volcanic graben （T3-J1 ）, intracontinental sag （J2 -K2 ） and strike-slip graben-horst structure stages. In this period, the characteristic rift-type palaeogeomorphology, sedimentary formation and bimodal magmatism formed. Sedex type ore deposits formed in the volcanic graben stage and a lot of skarn polymetallic ore deposits formed in the intracontinental sag stage.

关 键 词：地体 陆内裂谷 成矿作用 江达构造带 昌都-思茅构造带 

分 类 号：P541[天文地球—构造地质学] P611[天文地球—地质学]