| 西南三江地区造山演化过程及成矿时空分布 |
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| 引用本文： | 骆耀南,俞如龙.西南三江地区造山演化过程及成矿时空分布[J].地球学报,2002,23(5):417-422. |
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| 作者姓名： | 骆耀南 俞如龙 |
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| 作者单位： | 四川省地质矿产勘查开发局,成都,610081;四川省地质矿产勘查开发局,成都,610081 |
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| 基金项目： | 大规模成矿作用及大型矿集区预测”项目(G1999043203) |
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| 摘 要： | 三江地区单凭“一次造山”是难以圆满解释的,在此试以“多次造山”和“多期成矿”的思路作出合理的说明。晚古生代－中生代早期为多岛海造山阶段,羌塘弧、江达弧和临沧弧应为前锋弧,其后由一系列弧 后盆地和岛弧或残余弧（微大陆）组成。中生代中一晚期为陆内俯冲造山阶段,推测金沙江带、哀牢山带和龙门山－锦屏山带为俯冲主边界,从而形成该区燕山期重熔型花岗岩带,并控制相应矿产的分布特性。新生代陆内转换造山阶段造成具特征的构造－岩浆－成矿带,具有生成大型或超大型矿床的潜力。
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| 关 键 词： | 多岛海造山 陆内俯冲造山 陆内转换造山 成矿时空分布 |
Orogenic Evolution and Metallogenic Time-Space Distribution in Jinshajiang-Lancangjiang-Nujiang Region,Southwest China |
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| LUO Yao-nan and YU Ru-long.Orogenic Evolution and Metallogenic Time-Space Distribution in Jinshajiang-Lancangjiang-Nujiang Region,Southwest China[J].Acta Geoscientia Sinica,2002,23(5):417-422. |
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| Authors: | LUO Yao-nan and YU Ru-long |
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| Institution: | Sichuan Bureau of Geology and Mineral Resources, Chengdu, 610081;Sichuan Bureau of Geology and Mineral Resources, Chengdu, 610081 |
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| Abstract: | Geology of Jinshajiang Lancangjiang Nujiang region in Southwest China cannot be satisfactorily interpreted by the hypothesis"one orogenesis". An interpretation of "polyphase orogenesis" and "polyphase metallogenesis" has been proposed in the paper. Du ring the Late Palaeozoic Early Mesozoic archipelago orogenic stage, Qiangtang, Jomda and Lincang arcs should have served as the frontal arc, behind which a series of back arc basins and island arcs or remnant arcs (or microcontinents) was distributed. In the Middle Late Mesozoic orogenic stage of intracontinental subduction, Jinshajiang, Ailaoshan and Longmenshan Jinpingshan belts might have acted as the main intracontinental subduction zone, which caused the formation of Yanshanian remelting granites and controlled the distribution of mineral resources. In the Cenozoic stage of intracontinental transform orogenesis, the characteristic tectonic magmatic metallogenic zone was developed, which has a potential for the formation of large or superlarge deposits. |
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| Keywords: | Archipelago orogenesis intracontinental subduction orogenesis intracontinental transform orogenesis metallogenic time-space distribution |
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