| 江西省大湖塘石门寺矿区超大型钨矿的发现及找矿意义 |
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| 引用本文： | 项新葵,刘显沐,詹国年.江西省大湖塘石门寺矿区超大型钨矿的发现及找矿意义[J].火山地质与矿产,2012(3):141-151. |
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| 作者姓名： | 项新葵 刘显沐 詹国年 |
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| 作者单位： | 江西省地质矿产勘查开发局九一六大队,江西九江332100 |
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| 摘 要： | 江西省武宁县大湖塘石门寺超大型钨矿的成功勘查是我国地质找矿工作的重大发现。矿化类型划分为细脉浸染型、隐爆角砾岩型和石英大脉型。前者占总储量的74％，该类型以晋宁晚期黑云母花岗闪长岩为容矿围岩，以燕山中期酸性深成至浅成花岗岩为成矿母岩。矿体厚大且产状平缓，大致平行于黑云母花岗闪长岩与似斑状黑云母花岗岩株顶部的接触面分布，以外接触带为主（I1矿体），水平投影面积1．50km2，单工程最大厚度389．33m，平均厚度143．67m，平均品位0．193％，厚度变化系数63．7％，品位变化系数115．8％。工业矿物主要为白钨矿、黑钨矿、黄铜矿、辉钼矿。矿石组构类型主要有结晶结构、交代结构、细脉状构造、浸染状构造，常见近矿围岩蚀变为黑鳞云母化、云英岩化、绿泥石化，成因类型属岩浆期后高中温热液矿床，工业类型可划归为细脉浸染型白钨矿。石门寺矿区以黑云母花岗闪长岩为容矿围岩的细脉浸染状白钨的发现，改变了以往只专注评价石英大脉型黑钨矿的找矿思路，为矿区及九岭矿集区实现钨多金属找矿突破指明了新的方向。
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| 关 键 词： | 黑云母花岗闪长岩 细脉浸染状构造 白钨矿 矿床地质特征 找矿意义 赣北 |
Discovery of Shimensi super-large tungsten deposit and its prospecting significance in Dahutang area, Jiangxi Province |
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| XIANG Xin-kui,LIU Xian-mu,ZHAN Guo-nian.Discovery of Shimensi super-large tungsten deposit and its prospecting significance in Dahutang area, Jiangxi Province[J].Volcanology & Mineral Resources,2012(3):141-151. |
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| Authors: | XIANG Xin-kui LIU Xian-mu ZHAN Guo-nian |
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| Institution: | (NO. 916 Geological Party; Jiangxi Bureau of Geology and Mineral Resources, Jiujiang 332100, China) |
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| Abstract: | The successfully exploration of Shimensi super-large tungsten deposit, Dahutang area, Wuning coun- ty, Jiangxi Province, is an important discovery of the geological prospecting work in our country. The mineralization type of the deposit is divided into veinlet-disseminated type, cryptoexplosion breccia type and quartz thick vein type. The host rock of the veinlet-disseminated type deposit which accounting for about 14.86 percent of total reserves, are the Late Jinningian biotite granodiorites and the mineralization mother rock are the middle stage of Yanshan solid plutonic-hypabyssal granites. The orebodies are thick with gentle occurrence and appromately parallel to the contact surface of biotite granodiorite and the top of porphyraceous biotite granite stock. In addition, some features of the orebodies are described in this pa- per, such as external contact zone is important contact type（ I 1 orebody）, horizontal projective surface area is 1.50kmz,maximum thickness of single engineering is 389. 33m, average thickness and grade are re- spectively 143.67m and 0. 193~, change coefficient of thickness and grade are 63.7% and 115.8%, re- spectively. Industrial minerals are scheelite, wolframite, chalcopyrite and molybdenite. Ore textures are mainly crystal structure, metasomatic texture, ore structures are mainly veinlet and disseminated and wall rock alteration are protolithionite, greisenization and chloritization. It is a postmagmatic hydrothermal de- posit with high-middle temperature and is divided into veinlet disseminated scheelite. It is found that bi- otite granodiorite is the host rock of veinlet disseminated scheelite in Shimensi mining area, which change the prospecting thinking of paying more attention to quartz thick vein wolframite and point a new direction for tungsten polymetallic ore-search breakthrough in this area and Jiuling ore concentrating area. |
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| Keywords: | biotite granodiorite veinlet disseminated atructure scheelite geological features deposit prospecting significance northern Jiangxi |
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