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J4 ›› 2003, Vol. 11 ›› Issue (3): 1-10.

• 地质·矿床 •    下一篇

西藏班公湖—怒江成矿带中段岩浆演化及其金矿成岩成矿动力学模式

卫万顺1,2, 张宇辉2, 路彦明2, 刘桂阁2   

  1. 1. 北京大学,北京 100871;
    2. 武警黄金地质研究所,河北廊坊 065000
  • 收稿日期:2002-09-05 修回日期:2002-10-28 出版日期:2003-06-30 发布日期:2011-11-24
  • 作者简介:卫万顺(1964-),男,高级工程师,博士,从事金矿床模型及成矿预测研究工作.

MAGMATIC EVOLUTION AND METALLOGENIC MODEL OF GOLD DEPOSITS IN THE MIDDLE PART OF BANGONGHU -NUJIANGMETALLOGENIC BELT, TIBET

WEI Wangshun1,2,ZHANG Yuhui2,LU Yanming2,LIU Guige2   

  1. 1. University of Beijing, Beijing 100871, China;
    2. Gold Geological Institute of CAPF, Langfang, Hebei 065000, China
  • Received:2002-09-05 Revised:2002-10-28 Online:2003-06-30 Published:2011-11-24

摘要:

从岩浆活动的空间分布及演化特征的角度,研究了岩浆活动与金矿成矿、地球动力学之间的内在联系。提出了金矿成岩成矿具有统一性和周期性的6阶段演化的动力学模式。即T1-T2 ,羌塘地体、冈底斯地体雏形阶段; T3-J1,班怒洋盆、雅江洋盆雏形阶段;J2-J13洋盆不断扩张形成蛇绿岩套及与其有关金矿床阶段;J23-K1、洋盆闭合、地体拼合、雅江洋盆北向俯冲,形成变质热液型金矿床或与花岗岩有关的Au(Cu)、Sn、Pb、Zn 成矿系列; K2-E2 雅江蛇绿岩侵位阶段; E2以来,地幔柱形成高原隆升,砂金矿形成阶段。

关键词: 成岩成矿模式, 地球动力学, 金矿, 西藏

Abstract:

Mineralizing processes of gold deposits were controlled by the strong and widespread magmatic activities in the middle part of Bangonghu-Nujiang matallogenic belt. The internal relations of magmatic activities, mineralizing processes and earth dynamics have been studied on the base of study of spatial distribution and evolution of magmatic activities. A unified and periodic dynamic model which included six periods has been proposed. The first period is the embryonic period of Qiangtang terrane and Gangdisi terrane in the early and middle Triassic. The second is the embryonic period of Bangonghu-Nujiang ocean basin and Yaluzangbujiang ocean basin between late Triassic and early Jurassic. The third is between the late part of early Jurassic and the middle Jurassic when the ocean basin extended and ophiolite suite and its relational gold deposits had been formed. The fourth is between the middle part of late Jurassic and early Cretaceous when the ocean basin closured, the terranes matched, Yaluzangbujiang ocean basin subducted to the north and the metamorphic hydrothermal solution and the Au (Cu)-Sn-Pb-Zn mineralization series related to granite had been formed. The fifth is between the middle Cretaceous and late Palaeogene when Yaluzangbujiang ophiolite emplaced. The last period is between late Palaeogene and now when mantle plume formed, plateau uplifted and gold placer formed.

Key words: metallogenic model, gold deposits, earth dynamics, Tibet

中图分类号: 

  • P618.51

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