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首页> 外文期刊>Transactions of Nonferrous Metals Society of China >Role of NaCl in ore-forming of sand-shale type copper deposits
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Role of NaCl in ore-forming of sand-shale type copper deposits

机译:NaCl在砂页岩型铜矿床成矿中的作用

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摘要

Ore-forming fluids of sand-shale copper deposits in Meso-Cenozoic Diwa basins in South China are hot brine solutions composed mainly of NaCl, an important mineralizer. Studies on chemical kinetics and thermodynamics showed that NaCl plays an important part in the ore-forming process of sand-shale copper de- posits: (1) NaCl can obviously increase the dissolution rate of copper minerals in source bed, and catalyse the dissolution and migration of copper; (2) Cu and Cl~- can form stable cuprous chloride complexes to migrate, which are mainly CuCl~0, CuCl~-_2 and CuCl_2-_3; (3) the increase of NaCl concentration in solutions can enlarge the solubility of copper by orders of magnitude.
机译:中国南方中新生代的Diwa盆地的页岩铜矿床成矿流体是热盐溶液,主要由重要的矿化剂NaCl组成。化学动力学和热力学研究表明,NaCl在砂页岩型铜矿床成矿过程中起着重要作用:(1)NaCl可以明显提高源矿床中铜矿物的溶出速率,并催化其溶解和分解。铜迁移; (2)Cu和Cl〜-可形成稳定的氯化亚铜络合物迁移,主要为CuCl〜0,CuCl〜-_2和CuCl_2-_3; (3)溶液中NaCl浓度的增加可将铜的溶解度提高几个数量级。

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