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| 华南沉积岩系Hg、Sb丰度 | |
| 引用本文： | 刘义茂,杨东生,杨小强,庞保成.华南沉积岩系Hg、Sb丰度[J].大地构造与成矿学,2011,35(3):410-420. |
| 作者姓名： | 刘义茂 杨东生 杨小强 庞保成 |
| 作者单位： | 1. 中国科学院广州地球化学研究所,广东广州,510640 2. 中山大学地球科学系,广东广州,510275 3. 桂林理工大学地球科学学院,广西桂林,541004 |
| 基金项目： | 国家自然科学基金，中国科学院广州地球化学研究所同位素地球化学国家重点实验室部分资助 |
| 摘 要： | 从区域构造地球化学演化的角度来看,华南Hg、Sb矿床的形成主要可划分为三个阶段:(1)沉积层(主要是元古宙基底沉积层)堆积过程中Hg、Sb的储集;(2)元古宙基底(沉积层)的下沉-熔融-花岗岩形成与Hg、Sb释放;(3)在有利构造的引控下,含Hg、Sb流体形成、演化与成矿,简称为储存-释放-富集宏观三阶段。本文重点阐述的是第一阶段,华南沉积层特别是元古宙基底沉积层的Hg、Sb丰度。文中将华南沉积层Hg、Sb丰度分为四种类型:Ⅰ原生本底丰度;Ⅱ同生异常丰度;Ⅲ后生丰度;Ⅳ混合丰度。本文计算、统计出华南沉积岩系本底丰度Hg为0.368μg/g,Sb为1.28μg/g。华南元古宙基底沉积岩系本底丰度Hg为0.363μg/g,Sb为1.45μg/g都明显高于地壳及花岗岩Hg、Sb丰度值。 |
| 关 键 词： | Hg、Sb丰度 Hg、Sb成矿 沉积岩 元古宙基底 华南 |
Mercury and Antimony Abundances of Sedimentary Rocks in South China |
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| LIU Yimao,YANG Dongsheng,YANG Xiaoqiang,PANG Baocheng.Mercury and Antimony Abundances of Sedimentary Rocks in South China[J].Geotectonica et Metallogenia,2011,35(3):410-420. | |
| Authors: | LIU Yimao YANG Dongsheng YANG Xiaoqiang PANG Baocheng |
| Institution: | 1.Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;2.Department of Earth Science,Sun Yat-Sen University,Guangzhou 510275,Guangdong,China;3.College of Earth Science,Guilin University of Technology,Guilin 541004,Guangxi,China) |
| Abstract: | The evolution of Hg-Sb provinces in South China can be divided into three stages:(1) pre-enrichment of ore metals in sedimentary sequences,especially in Proterozoic basement;(2) tectonically driven subsidence of the Proterozoic basement(sedimentary sequences),followed by granite formation through partial melting of the basement;(3) involvement of structure-controlled fluids and subsequent ore mineral precipitation.This paper analyzes Hg and Sb abundances of sedimentary rocks(the Proterozoic basement in particular) from South China.Four types of Hg-Sb abundances have been identified for the South China sedimentary rocks.They are primordial background abundance(Ⅰ),cogenetic abnormal abundance(Ⅱ),epigenetic abundance(Ⅲ),and abundance being multiple in origin(Ⅳ).Average Hg and Sb background abundances are estimated to be 0.368μg/g and 1.28μg/g for the South China sedimentary strata and 0.363μg/g and 1.45μg/g for the Proterozoic basement,respectively.These Hg-Sb abundance values are significantly higher than the average of the crust and granitic rocks. |
| Keywords: | Hg-Sb abundances Hg-Sb mineralization sedimentary rocks Proterozoic basement South China |
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