| 初论苏门答腊（印尼）的岩浆一构造旋回及其板块构造背景 |
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| 引用本文： | 高小卫,吴秀荣,杨振强.初论苏门答腊（印尼）的岩浆一构造旋回及其板块构造背景[J].华南地质与矿产,2013(4):259-270. |
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| 作者姓名： | 高小卫 吴秀荣 杨振强 |
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| 作者单位： | 中国地质调查局武汉地质调查中心,武汉430205 |
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| 基金项目： | 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） |
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| 摘 要： | 本文将晚古生代以来苏门答腊火成岩划分出四个岩浆-构造旋回或岩浆活动期次（海西期、印支期、燕山期和喜山期），并讨论其板块构造背景。结果表明：分布于西苏门答腊地体海西期酸性侵入岩属于碰撞后地壳的火山弧I-型花岗岩带，其火山岩为大陆拉张带（初始裂谷）中的安山．玄武岩系列，而分布在东苏门答腊地体的大多数酸性侵入岩具有s-型花岗岩的性质。印支期西苏门答腊地体侵入岩为I-型花岗岩，属于火山弧花岗岩。印支期碰撞后板内岩浆活动带（廖内群岛-班加岛-勿里洞岛）的侵入岩以含锡s-型花岗岩为特色。燕山期以后的深成岩-火山岩活动的岩石类型和分布特征，受大陆拉张带（初始裂谷）及其相邻的洋岛的控制。燕山早期细碧岩属于陆缘裂谷火山岩。喜山期火山岩属于陆缘火山弧，其中橄榄玄粗岩落在洋岛玄武岩与洋中脊玄武岩（MORB）交界线附近。
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| 关 键 词： | 岩浆-构造旋回 板块构造背景 苏门答腊 |
A primary discuss on magma-tectonic cycles and their plate-tec- tonic setting in Sumatra. |
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| GAO Xiao-Wei,WU Xiu-Rong,YANG Zhen-Qiang.A primary discuss on magma-tectonic cycles and their plate-tec- tonic setting in Sumatra.[J].Geology and Mineral Resources of South China,2013(4):259-270. |
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| Authors: | GAO Xiao-Wei WU Xiu-Rong YANG Zhen-Qiang |
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| Institution: | (Wuhan Center of China Geological Survey, Wuhan 430205, Hubei, China) |
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| Abstract: | This paper aims mainly to try to subdivide the igneous rocks into 4 magma-tectonic cycles or mag- ma active episodes （Hereynian, Indochina, Yanshanian and Himalayan）since the Late Palaeozoic in Sumatra island, and then to discuss their plate tectonic setting. The result of our research show that, the Hercynian acidic intrusive rock located in Western Sumatra terrene may belong to 1-type granite zone of volcanic arc within the post-collision crust and its volcanic rocks belong to andesite-basalt series within continental extend zone（ initial rift valley）. However, the acidic intrusive rocks located mostly at East Sumatra terrene in the Her- cynian are of S-type granites. The intrusive rock types of the Indochina Episode in West Sumatra terrene~ be- longing to I-type granite may be considered to be the volcanic arc granite. The characteristics of the Indochina post-collision zone within plate （Riau Archipelago- Bangka - Billiton ） is showing a strong tin-associated S-type granite zone. The features of rock types and their distribution ofpluton - volcano activity since the Yan- shanian are controlled by continental extend zone （initial rift valley） and its adjacent volcanic island. The spilites of the Early Yanshanian are formed in continental rift environment. The Himalayan volcanism belongs to continental volcanic arc, in which the absarokites are located at the near boundary between the ocean island basalt and the MORB. |
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| Keywords: | magma-tectonic cycles plate tectonic setting Sumatra |
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