| 秦岭凤太地区金矿床成矿地质条件与时空分布特征 |
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| 引用本文： | 贺永平,闫宝华.秦岭凤太地区金矿床成矿地质条件与时空分布特征[J].陕西地质,2019(1):49-57. |
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| 作者姓名： | 贺永平 闫宝华 |
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| 作者单位： | 陕西地矿第三地质队 |
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| 摘 要： | 秦岭凤太地区金矿床产于商丹板块对接带和南秦岭边缘海盆区,含金建造为火山碎屑岩和细碎屑(热水)沉积建造,赋矿围岩以绿片岩相细碎屑岩为主。区内的金矿床主成矿年龄为220~170Ma,属晚印支期,主成矿期后叠加燕山期构造热液。空间上金矿带与铅锌矿带呈平行展布,金矿与韧性构造关系密切,显示了构造边界对金矿带的控制,具有继承性特征的脆韧性剪切带为含矿构造,北北东向与近东西向(北西西向)断裂的复合是金矿富集的主要构造特征。
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| 关 键 词： | 凤太地区 金矿 成矿地质条件 时空分布特征 |
METALLOGENIC CONDITIONS AND SPATIAL-TEMPORAL DISTRIBUTION OF GOLD DEPOSITS IN FENGXIAN-TAIBAI AREA OF QINLING |
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| He Yong-ping,Yan Bao-hua.METALLOGENIC CONDITIONS AND SPATIAL-TEMPORAL DISTRIBUTION OF GOLD DEPOSITS IN FENGXIAN-TAIBAI AREA OF QINLING[J].Geology of Shaanxi,2019(1):49-57. |
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| Authors: | He Yong-ping Yan Bao-hua |
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| Institution: | (Geological Team No.3.of Shaanxi Corporation of Geology and Mineral Development,Baoji 721300) |
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| Abstract: | Gold deposits in Fengtai area of Qinling Mountains occur in the butt joint of Shangdan plate and the basin area on the margin of South Qinling Mountains.Gold-bearing formations are pyroclastic rocks and fine clastic(hot water)sedimentary formations.The host rocks are mainly fine clastic rocks of greenschist facies.The main metallogenic age of the gold deposits in this area is 220-170 Ma,which belongs to the Late Indosinian Period.After the main metallogenic period,the structural hydrothermal fluid of the Yanshanian Period was superimposed.Spatially,the gold ore belts are parallel to the lead-zinc ore belt.Gold deposits are closely related to ductile structures,which shows that tectonic boundaries control the gold ore belt.The brittle-ductile shear zone with inherited characteristics is ore-bearing structure.The main structural feature of gold enrichment is the combination of NNE trending and near EW trending(NW trending)faults. |
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| Keywords: | Fengtai area gold deposit metallogenic conditions spatial and temporal distribution |
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