| 额济纳旗老硐沟氧化-淋滤型金矿床成矿特征 |
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| 引用本文： | 黄典豪,王宝林.额济纳旗老硐沟氧化-淋滤型金矿床成矿特征[J].地质与资源,1997,6(2):93-100. |
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| 作者姓名： | 黄典豪 王宝林 |
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| 作者单位： | 1. 中国地质科学院矿床地质研究所;2. 内蒙古第一物化探勘查院 |
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| 摘 要： | 内蒙古额济纳旗老硐沟金矿原生矿化与闪长玢岩脉和似斑状花岗闪长岩株有关.金-多金属矿脉产于蓟县系平头山群白云石大理岩中,主要受近E-W向和NWW向断裂控制.氧化-淋滤型金矿床的形成,乃是原生低品位金矿化和次生淋滤富集两个过程的结果.在目前采深50m的淋滤带中,金多富集在距地表10~30m范围内.氧化矿石的矿物组合为臭葱石+砷菱铅矾+褐铁矿+针铁矿+砷钙锌石+羟砷锌石+自然金+自然银+石英+蛋白石.
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| 关 键 词： | 氧化-淋滤型金矿床 成矿特征 老硐沟 内蒙古额济纳旗 |
| 收稿时间： | 1996-10-07 |
ORE FORMING CHARACTERISTICS OF LAODONGGOU OXIDIZED LEACHED TYPE GOLD DEPOSIT IN EJINAQI |
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| Huang Dianhao.ORE FORMING CHARACTERISTICS OF LAODONGGOU OXIDIZED LEACHED TYPE GOLD DEPOSIT IN EJINAQI[J].Geology and Resources,1997,6(2):93-100. |
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| Authors: | Huang Dianhao |
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| Institution: | 1. Institute of Mineral Deposits, CAGS, Beijing;2. No. 1 Geophysical and Geochemical Exploration Academy of Inner Mongolia, Hohhot |
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| Abstract: | Laodonggou gold deposit located in Ejinaqi,Inner Mongolia,consists of mainly gold polymetal ore veins,of which the most important No 98 and No 1 veins are being mined These veins occur mainly in Pingtoushan group dolomite marble of Jixian system and are controlled by nearly E W and WNW trending faults The primary mineralizations is related to diorite porphyrite dykes in origin The primary ore minerals are arsenopyrite,pyrite,galena (±sphalerite),native gold,native silver , argentite,etc Gold grade of the ores ranges from 0 1×10 -6 to 5 0×10 -6 The ore veins were suffered from oxidizing leaching in various degree by meteoric water and groundwater for a long time after these veins had been formed As observed at open pits of No 98 vein,within the oxidized leached zone of 50m from the surface,with the exception of residual galena,the sulfide minerals have been oxidized and formed earth and foveolate ores The mineral assemblage of the oxidized ore is scorodite+beudantite+limonite+goethite+austinite+adamite+native gold+native silver+quartz+calcite+opal,etc The secondary leached enriched zone of gold is between 10 and 30 m from the surface The average grade of gold is 10×10 -6 to 15×10 -6 Thus Laodonggou mineable gold orebodies are considered as oxidized leached type ore deposit |
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| Keywords: | oxidized leached type gold deposit ore forming characteristics Laodonggou Ejinaqi in Inner Mongolia |
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