| 河南省桐柏县河坎银矿地质特征及找矿标志 |
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| 引用本文： | 李文洲. 河南省桐柏县河坎银矿地质特征及找矿标志[J]. 科技信息, 2011, 0(15): 354-355,360 |
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| 作者姓名： | 李文洲 |
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| 作者单位： | 河南省地质矿产勘查开发局第三地质调查队,河南信阳464000 |
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| 摘 要： | 桐柏县河坎银矿位于朱庄背斜北东翼和老洞坡A型背斜北西翼结合部位,赋存于上元古界歪头山组下部第五（Pt3w15）和第六岩性段（Pt3w16）中。低角度的层间剥离断层或高角度的顺层正断层控制了矿体的分布。与矿化关系密切的近矿围岩蚀变以硅化为主,伴随有绢云母化和黄铁矿化。主要指示元素在矿体与围岩中均形成异常,元素轴向分带由上至下呈现低温元素组合到高温元素组合的变化规律。Cu、Mo为矿体尾部（下部）元素。Ag/Mo,Ag.Sb/Cu.Mo元素比值大小可作为判别矿体剥蚀程度及寻找深部银金属矿的地球化学标志。
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| 关 键 词： | 河坎银矿 地质特征 指示元素 围岩蚀变 找矿标志 |
Hekan Silver Mine Geology, Geochemistry Characteristic and Prospecting Signs in Tongbai County, Henan Province |
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| LI Wen-zhou. Hekan Silver Mine Geology, Geochemistry Characteristic and Prospecting Signs in Tongbai County, Henan Province[J]. Science, 2011, 0(15): 354-355,360 |
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| Authors: | LI Wen-zhou |
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| Affiliation: | LI Wen-zhou (The Third Geological Survey Team of Geology and Mineral Exploration and Development Bureau of Henan Province, Xinyang Henan,464000) |
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| Abstract: | Tongbai County Hekan Silver Mine is located in the combine zone of north-east Zhuzhuang anticline and north-west Laodongpo A type anticline, hosted in the fifth （Pt3w1^5） and the sixth lithologic （Pbw1^6） of lower part of Upper Proterozoic Waitoushan. Low angle layer detachment fault, or high-angle normal faults controlled bedding distribution of ore bodies. Near-ore alteration which is close to mineralization is silicification, accompanied by sericite and pyrite. Main indicator elements formed abnormally in the ore body and surrounding rock, along the axial element showing the change from low temperature to high temperature combination elements from top to bottom. Cu, Mo are the ore body tail （bottom） elements. Ag/Mo, Ag·Sb / Cu ·Mo element ratios are seem to be geochemistry signs of determination of erosion level of ore body and looking for silver metal ore. |
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| Keywords: | Hekan silver deposist Geological characteristics Indicator elements Rock alteration Prospecting signs |
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