| 阿尔泰大型-超大型矿床富集区地壳演化 |
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| 关键词:mantle plume triple junction rift continental break-up large-superlarge deposits enriched region Altay |
| 基金项目:国家三Ο五项目,阿尔泰地区成矿规律与成矿系列研究阶段成果 |
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| Crustal Evolution of Altay Large-Superlarge Deposits Enriched Region in Xinjiang |
| On the basis of comprehensive studies of various sorts of information such as tectonism, magmatism,metamorphism, ore-forming processes with their evolution in space and time, and geophysics, the formation and evolution(three accordion opening-closing events) of Altay large-superlarge deposits enriched region are considered to have been caused by the inception and evolution of Paleozoic Altay mantle plume-generated triple junction rifts. Ascending and lateral spreading of the mantle plume opened the triple junction rifts, resulted in the continental break-up, and generated Altay "ocean island-type" ophiolites, Altay-type granitoids, granitization, high-temperature and low-pressure metamorphic belts and chief large-superlarge deposits in the enriched region. Subsiding or resting of the mantle plume caused the A-type subduction, closing and orogeny of the triple junction rift system, and yielded triple-type intracontinental orogenic belts, synorogenic granitoids and some mineral deposits. |
| LI Hong-yang,YANG Zhu-sen,LUO Tai-yi,GAO Zhen-min,WANG Deng-hong.1999.Crustal Evolution of Altay Large-Superlarge Deposits Enriched Region in Xinjiang[J].Acta Geoscientica Sinica,20(4):409-417. |
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