东川铜矿床属我国老变质岩中的沉积变质层状铜矿类型,就其矿床地质及矿石工艺特征来看,它具有: 第一,矿床规模大(指储藏量)。第二,矿石含铜品位较低(除少数矿段或个别矿体外,矿石含铜品位大多为0.6～0.8％,且含铜品位在0.3～0.5％之间的矿石,占已探明储量的相当数量)。第三,矿石氧化率、结合率较高(就汤丹矿床而言,地表及地表以下若干公尺范围内即‘上部中段’的矿石,其氧化率 The Dongchuan copper deposit is a type of sedimentary metamorphic stratiform copper deposit in the old metamorphic rocks of China. In terms of its ore deposit geology and ore processing characteristics, it has the following features: Firstly, the ore deposit is large in scale (referring to the reserves). Second, the grade of ore containing copper is relatively low (except for a few ore bodies or individual ore bodies, the ore containing mostly copper with the copper grade of 0.6-0.8% and the copper grade of 0.3-0.5% A considerable number of). Third, there is a high rate of ore oxidation and incorporation (in the case of the Tangdan deposit, the surface and subsurface zones within a few meters of the upper middle section of the ores have oxidation rates