【作者】 孔红杰；

【导师】 杨锋杰； 莫德鼒； 王来明；

【作者基本信息】 山东科技大学 ， 矿产普查与勘探， 2005， 硕士

【摘要】 沂沭断裂带中段金矿床的龙泉站金矿地处山东省沂水市。是一典型的受韧性剪切带控制的韧性剪切带型金矿。该矿床位于中国东部最大的断裂带沂沭断裂带的中部,属于不同构造叠加复合部位,成矿条件十分有利。 区内太古代地层作为具绿岩带性质的一套火山-沉积建造,其金的背景值明显高于克拉克值,是该区金矿的主要矿源层之一。根据岩石镜下分析以及岩石化学分析对比,可以看出该矿床金的来源主要有两种:①基性火山岩系;②热液含金流体。 矿床矿石矿物组成较简单,金属矿物以黄铁矿为主,其次为黄铜矿,有一定量的自然金;脉石矿物主要为绿泥石、石英、绢云母及碎斑岩中的斜长石等。矿石构造以条带状、角砾状、脉状、浸染状和团块为主;矿石结构以自形、半自形、它形为主,其次为包含结构、交代结构等。 龙泉站金矿床产于沂水——汤头断裂带的破碎带汞丹山凸起区,金矿化遍布整个矿区所有的岩性层,明显属于构造控矿,与所处的岩性层没有太大的关系。区域性韧性剪切带控制了矿床的展布,而次级韧脆性剪切带(控矿剪切带)控制了富矿体的分布,后期的脆性构造对矿体有一定的改造、破坏作用,同时也加强了金的再一次富集。强烈的变形构造机制是金矿床形成的主要动力学、运动学机制。韧性剪切带既是导矿构造,也是控矿、容矿构造。 韧性剪切带型金矿床中金主要富集在应变最强部位和韧性向脆性转换的部位。更多还原

【Abstract】 The longquanzhan gold mine in the middle section of the Yishu fault zone is located in Yishui city Shandong province. The longquanzhan gold mine is a typical ductile gold mine, which has been controlled by ductile shear zone. this mine lies in Chinese east biggest fault zone—Yishu fault zone, which belongs to different structure overlay compound position, It is a very prospecting ore-forming region.Archeozoic layer in the district is a set of volcanic and deposit build, which is the character of greenstone belts. Archeozoic layer in the district golden background value is higher than Clark value obviously. It is one of the major mine sources in this district golden mine. Based on the rock analysis under the microscope and compare of the rock chemical analysis, it can see that the mineral gold origin chiefly possess two kinds: ① the volcanic rock; ②golden fluid medium of hot liquid.Minerals in mine are made up simpler, the metal minerals are pyrite, chalcopyrite in second, and little gold; the veinstone minerals are chlorite, quartz, sericite and feldspar etc. the structure of mineral stone is priority to strip shape, brecciform, veins shape, dip-dye shape and gobbets shape; the framework of mineral is composition with self form, semi-self, its form, embody composition and substitute composition in second.The longquanzhan gold mine bed lies in yishui-tangtou fault zone and gongdanshan horst. The gold minerization is found in all crag of entire mining area, it’ s obvious pertain to the structure controlled mine, have no very much great relationship in the crag straturm. Exhibition of the deposit is controlled by the regional ductile shear zone, and the ore’ s distrbution has been controlled by the secondary ductile shear zone(control led mine ductile zone), the brittleness structure of later stage possess the specified reconstruction and damage to the mineral ore, at the same time it also strengthened gold once more wealthy anthology. The deformation intensely mechanism is the main kinetics and更多还原