| 安徽宣城薛家村隐爆角砾岩的发现及其找矿意义 |
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| 作者姓名： | 洪大军 陈科夫 张旭 金敏 |
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| 作者单位： | 安徽省勘查技术院,合肥,230001;安徽省公益性地质调查管理中心,合肥,230000 |
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| 基金项目： | 安徽省公益性地质调查安徽省宣城市麻姑山—荞麦山地区铜(钼)多金属矿成矿条件与找矿靶区优选(项目 |
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| 摘 要： | 宣城茶亭铜金矿床是首次在皖东南地区发现的大型斑岩型铜金矿床,成矿岩体上部发育大规模与成矿有关的隐爆角砾岩。近期,在茶亭矿区西侧薛家村南部也发现了隐爆角砾岩,通过野外地质调查、室内综合分析及地球物理特征对比,证明角砾岩成分、矿化蚀变及矿物组合特征与茶亭铜金矿床的隐爆角砾岩类似;薛家村一带的CSAMT低阻、激电高极化、中等地磁、重力高特征也与茶亭矿区相似。茶亭矿区西部被三叠系覆盖,薛家村隐爆角砾岩的发现,指示茶亭矿区可能存在多次隐爆作用,对茶亭铜金矿床外围进一步找矿具有指导意义。
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| 关 键 词： | 找矿意义 茶亭斑岩型铜金矿 隐爆角砾岩 薛家村 安徽 |
| 收稿时间： | 2018-09-07 |
| 修稿时间： | 2019-01-21 |
Discovery of cryptoexplusive breccia in the Xuejiacun area in Xuancheng,Anhui Province and its prospecting significance |
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| Authors: | HONG Da-jun CHEN Ke-fu ZHANG Xu JIN Min |
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| Institution: | (1. Geological Exploration Technology Institute of Anhui Province, Hefei 230001, China; 2. Public Geological Survey Management Center of Anhui Province, Hefei 230000, China) |
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| Abstract: | The Chating copper-gold deposit is the first large-scale deposit porphyry copper-gold deposit discovered in Xuancheng,southeastern Anhui Province.Large-sized cryptoexplosive breccia,which is closely related to copper-gold deposit formation,occurs over the metallogenic rock bodies.Recently,a large amount of breccia of such kind was also found in the southern Xuejiacun area in the west of the western Chating mine area.Based on field geological investigation,comprehensive analysis and geophysical characteristics,it is proven that the composition,alteration and mineralization,and mineral combination of cryptoexplosion breccia are similar to those in the Chating mine area.In addition,the Xuejiacun area has low resistivity of CSAMT,high chargeability of induced polarization,medium geomagnetic and high gravity,all of which are similar to those in the Chating mine area.Moreover,the western Chating mine area is covered by Triassic formation.These findings suggest that this area may probably experience multiple cryptoexplosion,which has a certain significance to guide further ore prospecting outside the Chating mine area. |
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| Keywords: | prospecting significance Chating porphyry copper-gold deposit cryptoexplosive breccia Xuejiacun Anhui Province |
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