| 华南新元古代裂谷盆地演化——Rodinia超大陆解体的前奏 |
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| 引用本文： | 王剑,刘宝珺,潘桂棠.华南新元古代裂谷盆地演化——Rodinia超大陆解体的前奏[J].矿物岩石,2001,21(3):135-145. |
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| 作者姓名： | 王剑 刘宝珺 潘桂棠 |
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| 作者单位： | 中国地质调查局成都地调中心,四川,成都,610082 |
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| 基金项目： | 国家自然科学基金重点项目 (编号 :40 0 32 0 10 )；；
面上基金项目 (编号 :49972 0 46 )联合资助项目 |
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| 摘 要： | 沉积学研究表明，华南新元古代沉积盆地具典型裂谷盆地沉积演化特征。代表裂谷盆地早期形成阶段的成因相组合有：冲洪积相组合、陆相（或海相）火山岩及火山碎屑岩相组合、滨浅海相沉积组合、淹没碳酸盐台地及欠补偿盆地黑色页岩相组合；而代表中、后期形成阶段的成因相组合有：滨岸边缘相至深海相组合，冰期冰积岩相组合、碳酸盐岩及碳硅质细碎岩相组合。华南裂谷盆地岩相古地理演化经历了5个重要的时期，整体上反映了一个由陆变海、由地堑－地垒相间盆地变广海盆地、由浅海变深海、盆地上小变大的演化过程。裂谷盆地的形成经历了裂谷基的形成、地幔柱作用与裂谷体的形成，被动沉降（下坳）与裂谷盖的形成三个阶段。华南裂谷盆地的形成演化与Rodinia超大陆在新元古代时期的裂解作用密切相关，它是超大陆解体过程的一个重要组成部分。
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| 关 键 词： | 华南 新元古代 裂谷盆地 Rodinia超大陆 沉积盆地 裂解作用 |
NEOPROTEROZOIC RIFTING HISTORY OF SOUTH CHINA SIGNIFICANCE TO RODINIA BREAKUP |
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| WANG Jian,LIU Bao,jun,PAN Gui,tang.NEOPROTEROZOIC RIFTING HISTORY OF SOUTH CHINA SIGNIFICANCE TO RODINIA BREAKUP[J].Journal of Mineralogy and Petrology,2001,21(3):135-145. |
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| Authors: | WANG Jian LIU Bao jun PAN Gui tang |
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| Abstract: | The Neoproterozoic basins in South China are characteristic of rift basins, and their evolutions are closely related to the breakup of Rodinia. 1. The basins evolution underwent four major development stages. (1)fluvial littoral to deeper water deposition stage; (2)continental to marine volcanic dominated stage, (3)continental ice cap to continental glacial shelf sea dominated stage, (4) carbonate and/or carbonaceous siliceous sediments formed stage. 2.The age determination by sensitive high resolution ion microprobe(SHRIMP) indicates that the evolution of rift basin experienced four stages:(1)the formation of the rift basement; (2)the formation of mantle plume and graben basin; (3)the subsidence of the basement and filling of the rift body, and (4)passive subsidence and formation of the rift cover. 3. The study of South China rift suggests that: (1) the rifting operated during the late Neoproterozoic was worldwide, which brought about a number of rift basins around individual continents after the breakup of Rodinia. This rifting event was responsible for the separation of Australia from Yangtze(600 Ma~550 Ma), and of Laurentia from Cathaysia. (2) The South China block lay between eastern Gondwanaland, Laurentia and Siberia. |
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| Keywords: | South China Neoproterozoic rifting facies and paleogeography Rodinia |
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