林碧海 张锦煦 朱继华 陈剑锋

摘  要  湖南炎陵县双爪垄金铅矿点位于茶陵—郴州深大断裂带南东盘，万洋山复式岩体西部与奥陶系天马山组接触部位。已发现2条金铅矿体，均产于强蚀变的构造角砾岩带中;金铅矿与黄铁矿伴生，均随硅质热液沿裂隙充填交代;具中低温热液裂隙充填交代的硫化物型金铅矿床特征。在地表异常较好且构造发育区域是寻找破碎带蚀变岩型的金铅矿的有利地段;边深部亦是寻找破碎带蚀变岩型和蚀变花岗岩型金铅矿的有利部位。

关键词  金铅矿;构造破碎带;花岗岩;万洋山岩体;天马山组

中图分类号：P618.51                          文獻标志码：A

Geological Characteristics and Metallogenic Prognosis of

Shuangzhualong Gold-Lead Ore Spot in Yanling County， Hunan

Lin Bihai ， Zhang Jingxu ， Zhu Jihua， Chen Jianfeng

（Hunan Institute of Geological Survey， Changsha Hunan 410116）

Abstract： Shuangzhualong gold-lead ore spot in Yanling County， Hunan is located in the southern east plate of the Chaling—Chenzhou deep fault zone. It is located in the contact area between the western side of Wanyangshan complex rock mass and the Ordovician Tianmashan Formation. Two gold-lead ore bodies were discovered， both of which occurred in strongly altered structural breccia belts. The gold lead ore is associated with pyrite and both are filling metasomatic with siliceous hydrothermal fissure along the fissures. It is characterized as medium-low temperature hydrothermal fissure filling metasomatic sulfide-type gold-lead deposits. The surface with good anomalies and the structurally developed area is a favorable area for exploring fracture zone altered rock type gold-lead deposits. The edge-depth is also a favorable location for exploring fracture zone altered rock type and altered granite type gold lead deposits.

Keywords： gold-lead ore spot; tectonic fracture zone; granites; Wanyangshan rock mass; Tianmashan Formation

双爪垄金铅矿点是开展湖南浣溪地区1：5万地质矿产综合调查时新发现的矿点[1]。矿点位于万洋山复式岩体西部与奥陶系天马山组接触部位。通过分析该矿点的矿区地质特征、地球化学异常特征、矿体特征，对其展开成因、成矿模式和成矿预测等方面的探讨和研究，为该区的找矿工作提供理论认识与指导方向。

1  区域地质概况

双爪垄金铅矿点位于钦—杭结合带湖南段北东端，茶陵—郴州深大断裂带南东盘;南岭成矿带北部东侧，湘东南有色多金属矿集区北缘[2]。

区内主要出露有寒武、奥陶、泥盆、石炭、白垩和古近系。褶皱主要分为加里东期北西向褶皱和印支期北东向褶皱两期[3]。断裂构造主要形成于印支期和燕山期，少量形成于加里东期;主要分为NWW-NW向，NNE-NE向2个主要系列。岩浆活动频繁，主要有万洋山岩体;形成时期主要为加里东期，岩性主要为花岗岩。……