| 桂北桂中泥盆纪沉积盆地大地构造演化与铅锌成矿作用 |
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| 引用本文： | 王剑,宁浦功.桂北桂中泥盆纪沉积盆地大地构造演化与铅锌成矿作用[J].南方国土资源,1998(1). |
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| 作者姓名： | 王剑 宁浦功 |
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| 作者单位： | 成都地质矿产研究所(王剑)，广西地矿局(宁浦功) |
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| 摘 要： | 广西泥盆纪沉积盆地大地构造演化大致经历了３个主要阶段：１．加里东造山运动与盆地基地的形成阶段。大约４０８Ｍａ左右结束的加里东运动使包括广西在内的整个中国南方隆升为陆，为泥盆纪沉积盆地的形成奠定了基础。２．张裂走滑盆地的形成阶段。自早泥盆世开始，沿钦洲—防城一线自南向北开始形成板内张裂盆地，中晚泥盆世海侵作用逐渐达到桂北。３．盆地演替与造山阶段。泥盆纪直至三叠纪，沉积盆地经历了盆、台、缓坡、陆架及镶边台地等演替过程，最终为印支运动造山成陆。大地构造演化与铅锌成矿作用关系密切，首先表现为拉张构造背景形成对流热源及沉积喷流作用；其次是拉张构造背景下形成的沉积层序边界面、沉积体系域、沉积相单元及与古地理单元等是重要的控矿因素；再次是造山运动与后期改造对成矿作用起了重要的再富集作用。
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| 关 键 词： | 沉积盆地 层序 层控矿床 铅锌矿床 |
STUDY ON TECTONIC EVOLUTION OF DEVONIAN SEDIMENTARY BASINS AND LEAD - ZINC METALLIZATION OF GUANGXI |
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| Authors: | Wang Jian |
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| Abstract: | The tectonic evolution of Guangxi's sedimentary basins had approximately gone through three major phases: 1. Caledonian orogeny and basins' base formation phase. Caledonian orogeny, ending at about 408 Ma, made the whole southern China including Guangxi upheave to be continent and laid a base for the formation of Devonian basins. 2. Extensive strike-slip basins' formation phase. Since Devonian epoch began, the extensive basins in the plate had come to form along the line Qinzhou-Fangcheng from south to north, and the transgression had gradually reached the northern Guangxi in middle-late devonian epoch. 3. Basins' evolution, transposition and orogeny phase.From Devonian period till Triassic period, sedimentary basins had gone through the evolutionary and transpositional processes as basin, platform, gentle slope, shelf and rimmed platform etc., finally, they uprose to be continent due to Indosinian orogeny. The tectonic evolution has close relations with lead-zinc metallization, it shows, primary, that convective heat sources and sedimentary jet-flow formed under tensional tectonics background, secondary, that the boundary surface of sedimentary sequence, sedimentary systematic domains, sedimentary facies unit and palaeogeographic unit etc. , forming under the same background, are important ore-controlling factors, tertiary, that the orogenies and later reformation took important reconcentrations to the metallization. |
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| Keywords: | sedimentary basin sequence stratabound deposit |
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