| 安徽马头斑岩型钼铜矿床蚀变带常量元素迁移规律及其定量计算 |
| Received:April 13, 2013 Revised:November 06, 2013 点此下载全文 |
| 引用本文：AI JinBiao,MA ShengMing,ZHU LiXin,XI MingJie,FAN LianJie,HU ZhaoXin,ZHANG Yan.2013.Major elements migration regularity and mass change quantification of alteration zones in Matou porphyry Mo-Cu deposit, Anhui Province[J].Mineral Deposits,32(6):1262~1274 |
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| Author Name | Affiliation | E-mail | | AI JinBiao | Sichuan Institute of Metallurgical Geology and Exploration, Chengdu 610051, Sichuan, China
Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, Hebei, China
Chinese Academy of Geologi-cal Sciences, Beijing 100037, China | | | MA ShengMing | Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, Hebei, China | MSMIGGE@163.com | | ZHU LiXin | Chinese Academy of Geologi-cal Sciences, Beijing 100037, China | | | XI MingJie | Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, Hebei, China | | | FAN LianJie | China University of Geological Sciences, Beijing 100083, China | | | HU ZhaoXin | Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, Hebei, China
Chinese Academy of Geologi-cal Sciences, Beijing 100037, China | | | ZHANG Yan | Institute of Geochemical Exploration and Marine Geological Survey, East China Mineral Exploration and Development Bureau for Non-ferrous Metals, Nanjing 210007, Jiangsu, China | |
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| 基金项目:本文得到国土资源部公益性行业科研专项项目（编号：201111008）的资助 |
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| 中文摘要:文章对安徽马头斑岩型钼铜矿床花岗闪长斑岩体和粉砂岩在矿化蚀变过程中常量元素的迁移规律进行了探讨。马头矿床元素质量迁移计算结果表明，在钼铜矿化蚀变过程中常量元素均发生不同程度的带入带出，迁移规律明显。在花岗闪长斑岩中，从钾化带、绢英岩化带到青磐岩化带，均为带入的常量元素有K2O、CaO、SiO2、H2O+，而Na2O明显带出，说明矿化与去钠化、钾长石化等蚀变密切相关。在粉砂岩中，蚀变岩明显带出的有Na2O、CaO、MgO、Fe2O3、H2O+等，而且黄铁辉钼矿化粉砂岩在常量元素的迁移程度远比青磐岩化粉砂岩大。马头矿床成矿系统质量变化定量计算结果表明，花岗闪长斑岩和粉砂岩系统的质量变化整体上表现为净带入与净带出，且净带出量大于净带入量，因此马头矿床成矿系统总体上是净带出的，即马头矿床钼铜矿化产出在元素总体负异常体系中。该项研究成果为揭示矿化蚀变过程中元素的作用机制提供了线索，并且可能成为深部成矿潜力定量评价的有效途径之一。 |
| 中文关键词:地球化学 斑岩型钼铜矿床 常量元素 定量计算 迁移规律 矿化蚀变 带入带出 马头 |
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| Major elements migration regularity and mass change quantification of alteration zones in Matou porphyry Mo-Cu deposit, Anhui Province |
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| Abstract:This paper investigated the migration regularity of major elements in the process of mineralized alteration for granodiorite porphyry and siltstone in the Matou porphyry Mo-Cu deposit of Anhui Province. The calculations of element mass migration show that the major elements experienced gains and losses in various degrees, and the migration regularity was obvious in the processes of Mo-Cu mineralized alteration. In granodiorite porphyry, from potash alteration zone, sericitization zone to propylitization zone, the major elements showed gains of K2O, CaO, SiO2, H2O+; and the obvious loss of Na2O, indicating that mineralization was closely associated with de-albitization and K feldspathization. In siltstone, altered rocks were obviously depleted in Na2O, CaO, MgO, Fe2O3, H2O+, and the migration quantity of major elements in pyrite-molybdenum mineralization siltstone was larger than that in propylitization. Metallogenic system quantitative calculation results show that the quality change of the system of granodiorite porphyry and siltstone did not increase or decrease on the whole, and the amount of gain is higher that of loss. It is held that it was purely gained in the whole metallogenic system and the mineralization of Mo-Cu was included in a negative anomalous system. The results obtained by the authors can provide evidence for quantitative evaluation of the prospecting potential of deep deposits, and may become a effective way for quantified evaluation of potential deep mineralization. |
| keywords:geochemistry porphyry Mo-Cu deposit major element quantitative calculation migration regularity mineralized alteration gain and loss Matou |
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