本文選題：裂隙巖相學(xué)　切入點：鎢礦　出處：《礦物學(xué)報》2017年05期 　論文類型：期刊論文

【摘要】：通過裂隙統(tǒng)計和測量,分析裂隙充填物等裂隙巖相學(xué)特征,探討裂隙構(gòu)造與鎢富集成礦關(guān)系。研究認為,本區(qū)裂隙分為4期,裂隙傾角(中軸夾角)分別為9°、29°、47°、69°。白鎢礦主要賦存在層間裂隙中,其細脈傾角在45°左右,與地層構(gòu)造變形面理大致相同,部分白鎢礦細脈賦存在穿層裂隙組中,細脈傾角在60°左右。白鎢礦富礦體和裂隙儲礦空間受黑云母閃長巖侵入巖體控制較為明顯,在黑云母閃長巖侵入巖體附近,碎裂巖化相較為強烈,平均裂隙密度達到35條/m,局部裂隙密度最高可達110條/m,白鎢礦富集在黑云母閃長巖體的外接觸帶;裂隙充填物類型包括高溫到低溫礦物,其特征表明裂隙充填物具有多期次形成的特征;白鎢礦富集成礦主要與電氣石化和硅化密切相關(guān),推測白鎢礦富集成礦主要受黑云母閃長巖有關(guān)的巖漿熱液成礦作用和裂隙密度大小耦合關(guān)系控制,本礦區(qū)新發(fā)現(xiàn)的鎢礦具有較好找礦前景。
[Abstract]:By means of fracture statistics and measurement, this paper analyzes the lithofacies characteristics of fissures such as fissures filling, discusses the relationship between fracture structure and tungsten enrichment and metallogenesis, and concludes that the fractures in this area are divided into four stages. The fracture dip angle (the angle between the central axis and the middle axis) is 9 擄/ 29 擄/ 47 擄/ 69 擄respectively. Scheelite mainly occurs in the interlayer fissure, and its vein-dip angle is about 45 擄, which is approximately the same as that of the tectonic deformation surface, and some of the scheelite veins occur in the fracture group of the interlayer. The vein-dip angle is about 60 擄. The ore-storage space of scheelite rich ore body and fissure is obviously controlled by biotite diorite intrusive rock mass, and in the vicinity of biotite diorite intrusive rock mass, the cataclastic lithofacies is relatively strong. The average density of fractures is 35 / m, and the highest density of local fractures is 110 / m. Scheelite is concentrated in the outer contact zone of biotite diorite, and the types of fissure filling include high temperature to low temperature minerals. Its characteristics indicate that the fissure filling has the characteristics of multi-stage formation, and the enrichment and mineralization of scheelite are mainly related to tourmalization and silicification. It is inferred that the enrichment and mineralization of scheelite are mainly controlled by magmatic hydrothermal mineralization related to biotite diorite and coupling relationship of fracture density and density. The newly discovered tungsten deposits in this mining area have a good prospecting prospect.
【作者單位】： 中國地質(zhì)大學(xué);有色金屬礦產(chǎn)地質(zhì)調(diào)查中心;海南茂高礦業(yè)有限公司;
【基金】：海南茂高礦業(yè)有限公司找礦科研專項基金(批準號:MGY201601)
【分類號】：P618.2
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本文編號：1651694