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| 大别造山带的流体系统与成矿作用 | |
| 引用本文： | 杜建国,顾连兴,等.大别造山带的流体系统与成矿作用[J].地质学报,2001,75(4):507-517. |
| 作者姓名： | 杜建国 顾连兴 |
| 作者单位： | 1. 安徽地质调查院, 2. 南京大学地球科学系, 3. 合肥工业大学资源与环境科学系, |
| 基金项目： | 地质矿产部“九五”重大基础项目(编号9501102-3-1) |
| 摘 要： | 大别山是大别造山带的主体部分，流体活动贯穿于俯冲－碰撞－折返整个造山过程。印支期俯冲－碰撞阶段的流体，以具高挥发份、高盐度为特点，流体中保留有原岩在地表时的天水－岩石以及超高压变质过程中的地幔流体－岩石同位素交换的信息。燕山期折返隆升阶段的流体是大量天水与深部流体发生混合的产物，流体中盐度降低，但水－岩相互作用增强。大别造山带的流体系统可称为“天水与深部流体混合系统”，并可分为流体富集区、流体贫乏区和流体排泄区三个部分。成矿作用主要发生在流体富集区。 |
| 关 键 词： | 流体系统 成矿作用 造山过程 大别造山带 水－岩相互作用 |
| 修稿时间： | 2000年10月25 |
Fluid System and Mineralization of the Dabie Orogenic Belt |
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| DU Jianguo,GU Lianxing,SUN Xianru,YUE Shucang ZHOU Taof,DAI Shengqian,ZHAI Jianping Anhui Academy of Geological Survey,Hefei,.Fluid System and Mineralization of the Dabie Orogenic Belt[J].Acta Geologica Sinica,2001,75(4):507-517. | |
| Authors: | DU Jianguo GU Lianxing SUN Xianru YUE Shucang ZHOU Taof DAI Shengqian ZHAI Jianping Anhui Academy of Geological Survey Hefei |
| Institution: | DU Jianguo,GU Lianxing,SUN Xianru,YUE Shucang ZHOU Taof,DAI Shengqian,ZHAI Jianping Anhui Academy of Geological Survey,Hefei, Department of Evironment and Resources,Hefei University of Technology,Hefei, Department of Earth Sciences,Na |
| Abstract: | Fluids were active in the whole process of orogenesis of the Dabie orogen. Fluids of the Indosinian subduc-tion and collision stages were characterized by high contents of volatile components and high salinity. Evidence from oxygen isotope values indicates that the protoliths of the ultra-high pressure metamorphic rocks underwent pre-subduction interaction with meteoric water at the surface and were subsequently affected by mantle fluids during subduction, collision and progressive metamorphism. The deep-source fluids were mixed with large quantities of meteoric water during exhumation and uplifting of the orogen, resulting in salinity reduction of the fluids and intensification of water/rock interactions in the Yanshanian stage.Fluids of the Dabie orogenic belt could be considered to have formed a mixed meteoric and mantle fluid system. Based upon the behaviour of fluid activity, the Dabie orogen has been divided into the fluid-rich, fluid-poor and fluid-draining regions. Gold deposits are located mostly within the fluid-rich region. |
| Keywords: | fluid system mineralization orogenic process Dabie orogenic belt |
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