中文摘要：

通过野外地质观察和对已揭露工程地段进行取样，采用显微镜观察、岩石化学分析、微量元素分析、x射线衍射、扫描电镜及微区能谱分析等手段，研究了铜厂沟铜矿矿石矿物组成及地质地球化学特征。结果表明，铜厂沟铜矿矿石类型为含铜砂岩型和含铜蚀变构造角砾岩型：砂岩型铜矿具有层控特征，矿体产出明显受三叠系飞仙关组等赋矿层位的控制；蚀变构造角砾岩型铜矿矿体沿SW向次级控矿断裂具一定规模展布并受其控制，矿石含铜品位达3．26％～3．88％。2类型铜矿石的主要矿物组成为斑铜矿、黄铜矿、辉铜矿、孔雀石，见少量蓝铜矿、自然铜、方解石、石英；主要围岩蚀变为沸石化、重晶石化、沥青化、硅化、绿泥石化、高岭石化及碳酸盐化等。砂岩型铜矿控矿及赋矿围岩岩石化学成分中SiO2含量、SiO2／Al2O3值、Na2O、K2O含量特征和CaO＋MgO含量分布特点，表明岩石为海相碎屑沉积成因。蚀变构造角砾岩型铜矿石为构造运动改造形成。

英文摘要：

Based on field investigation and sampling from profile position within the Tongchanggou mine, mineral composition, geochemical characteristics and the ore type have been studied by microscope observation, petrochemical analysis, trace element analysis and scanning electron microscope analysis. The results indicate that there are two types of copper ore, the one is copper-containing sandstone type, and the other is altered structural breccia type. The sandstone-type copper mineralization has stratabound features and is controlled by the Triassic strata of the Feixianguan Formation. The structural breccia type copper ore bodies are controlled by faults extending in SW direction, and the copper grade change from 3. 26% to 3. 88%. Ore minerals in both types copper ore mainly include bornite, chalcopyrite, chalcocite, malachite, and minor in blue copper, native copper. The major wall rock alterations include zeolite, barite-oriented, asphalt-based, silicification, chloritization, kaolinization and carbonation. The ratio of SiO2/A12Oa ,contents of such components as SiO2, Na20, K20 and CaOq- MgO in the ore-hosting rocks of the sandstone-type copper deposit indicate that the ore-hosting sandstone is of marine origin. While the structural breccia type copper ore is resulted from the tectonic movement.