矿田尺度成矿规律与成矿系列研究——以湖南水口山为例
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本文为中央级公益性科研院所基本科研业务费项目(编号 JYYWF20183701、JYYWF20183704)和中国地质调查局中国矿产地质志项目(编号 DD20160346、DD20190379)资助成果。


Research on metallogenetic regularity and metallogenic series in ore fields——a case study from the Shuikoushan ore field, Hunan Province
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    摘要:

    水口山矿田位于南岭成矿带的北缘。矿田内矿种多,资源丰富,包括Pb、Cu、Zn、Au(Ag)、U、Cd、In、Mn等。矿床类型以内生矿床为主,还包括不少外生矿床。内生矿床主要包括老鸦巢铅锌金矿、鸭公塘铁铜铅锌(铀)矿、康家湾铅锌银金矿等,主要成矿时代为燕山中期(150~160Ma)。外生矿床包括产于二叠系斗岭组的煤层,龙王山风化壳型金矿等,形成于海西期至喜马拉雅期。在空间上,整个矿田内生多金属矿化类型自西向东以及由深到浅呈现出矽卡岩型—中低温热液交代充填型—风化壳型的水平和垂向分带特征,成矿元素组合则相应呈现出Fe、Cu、Pb、Zn→Pb、Zn、Au、Ag、U→Pb、Zn、Au(Ag)→Au的递变趋势。水口山(铁铜)铅锌金多金属矿田的形成与矿田内部出露的花岗闪长岩和英安斑岩关系密切。矿田内与燕山期中—酸性(主要为酸性)岩浆作用有关的铜(铁)、铅锌、金、银(铀)多金属成矿作用可总结为水口山式,为华南地区与燕山期中酸性岩浆作用相关的多金属成矿作用的典型代表。根据成矿规律的研究,水口山深部找矿勘查应集中于:① 深部—浅部花岗闪长岩体内部斑岩型Cu多金属矿床的勘查;② 深部和外围矽卡岩型Fe、Cu、Pb、Zn多金属矿床的勘查。

    Abstract:

    The Shuikoushan ore field is situated in the northern margin of the Nanling metallogenic belt. The ore field has abundant mineral resources including those rich in Pb, Cu, Zn, Au (Ag), U, Cd, In, Mn. The deposits are mainly of endogenetic type, but several exogenetic deposit are also present. The endogenetic deposits are include of Laoyachao Pb, Zn, Au deposits, Yagongtang Fe, Cu, Pb, Zn deposits, and Kangjiawan Pb, Zn, Ag, Au deposits. They are dated to between 160 to 150 Ma in the middle Yanshanian period. The exogenic deposits include examples like the coal measures occurring in the Douling formation of the Permian, and the Longwangshan weathering crust type gold deposits which were formed during the Hercynian and Yanshanian periods. From deeper to shallower sections, and from west to east, the Shuikoushan ore- field shows zonal characteristics of “porphyry type”- skarn- type- medium to low temperature hydrothermal metasomatic filling type- weathering crust type; the metallogenic element assemblages show a progressive trend in Fe, Cu, Pb, Zn- Pb, Zn, Au, Ag, U- Pb, Zn, Au (Ag)- Au. The formation of these deposits is closely related to the granodiorite and dacite porphyry ores in the Shuikoushan field. The polymetallic mineralization of Yanshanian middle- acidic (mainly acidic) magmatism related copper (iron), lead and zinc, gold and silver (uranium) in the ore field can be described as the Shuikoushan type, and is a typical part of the polymetallic mineralization related to the intermediate- acidic magmatism in south China. Based on this research the future deep ore- prospecting work in Shuikoushan ore field should focus onexploration of: 1) porphyry Cu polymetallic deposits in the deep- shallow granodiorite; and 2) deep and peripheral skarn- type Fe, Cu, Pb, Zn polymetallic deposits.

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秦锦华,王登红,陈毓川,赵如意,刘善宝,江彪.2020.矿田尺度成矿规律与成矿系列研究——以湖南水口山为例[J].地质学报,94(1):255-269.
QIN Jinhua, WANG Denghong, CHEN Yuchuan, ZHAO Ruyi, LIU Shanbao, JIANG biao.2020. Research on metallogenetic regularity and metallogenic series in ore fields——a case study from the Shuikoushan ore field, Hunan Province[J]. Acta Geologica Sinica,94(1):255-269.

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  • 收稿日期:2019-10-27
  • 最后修改日期:2019-12-12
  • 录用日期:2019-12-13
  • 在线发布日期: 2019-12-17
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