苏门答腊岛(印尼)岩浆旋回中的成矿作用  

A discussion on mineralization within magmatic cycles, Sumatra(Indonesia)

作　　者：高小卫[1] 杨振强[1] 吴秀荣[1] 

机构地区：[1]中国地质调查局武汉地质调查中心,武汉430205

出　　处：《华南地质与矿产》2013年第4期299-307,共9页Geology and Mineral Resources of South China

基　　金：国际合作研究项目<印尼中苏门答腊岛铜金等多金属矿产成矿规律研究>(科〔2011〕01-71-14)

摘　　要：本文阐述了东苏门答腊地体和西苏门答腊地体白海西期岩浆旋回以来各自的金属矿产分布特征。海西期东苏门答腊地体以裂陷盆地的层控型铅-锌矿为主，而矽卡岩型Ag、cu和Pb．zn矿化产于西苏门答腊地体。印支期sn矿成矿作用主要与s-型花岗岩类（220～195Ma）侵入和苏门答腊岛中部的梅迪亚苏门答腊深大断裂走滑活动有关。燕山早期铜．金成矿作用为陆缘夭折古裂谷和岛弧环境。燕山晚期为弧-陆碰撞的火山弧的Sn-Au-Ag成矿作用。喜山期发育的岩浆弧Au—Ag成矿与苏门答腊深大断裂活动和巴厘散构造带有关，归因于印度-澳大利亚洋壳斜向俯冲于苏门答腊岛之下。This paper presents the distribution characteristics of metallic mineral deposits since Hercynian cy- cles within East Sumatra Terrane and West Sumatra Terrane （Indonesia） separately. The strata-bound Pb-Zn deposits are dominant in sedimentological basins in East Sumatra Terrane within Hercynian cycle, and the Ag, Cu and Pb-Zn mineralizations of skarn-type occur in West Sumatra Terrane. The Indosinian cycle＇s fin-miner- alization is related to the intrusion of S-granitoids （220 - 195 Ma） and to the deep strike-sliping activity of Me- dia Sumatra Fault Zone at Central Sumatra. The Early Yanshanian cycle＇s Cu-Au mineralization occur in the died ancient rifting valley and arc island environment at the continental margin. The Sn and Au-Ag mineraliza- tion in volcanic arc was caused by arc-continent collision during Late Yanshanian cycle. The Au-Ag mineral- izations of magmatic arc within Himalayan cycle were related to the Sumatra Fault and Barisan Fault Zone that were caused by the oblique subduction of Indian-Australia crust beneath Sumatra.

关 键 词：成矿作用 岩浆旋回 苏门答腊岛 印度尼西亚 

分 类 号：P612[天文地球—矿床学]