Abstract:The Dongguashan copper deposits occur mainly in the Middle-Upper Carboniferous Huanglong-Chuanshan Groups. Orebodies are fairly large in size and the copper grade is relatively high. The quantitative analysis of 749 samples for halogen contents indicates that there exist obvious relations between the distribution of fluorine-chlorine and mineralization. Two kinds of copper ore deposits are observed in the Dongguashan mining area. One is made up of contact-metasomatic skarn type copper deposits which are characterized by comparatively high chlorine content in relevant rocks such as diorite and skarn, F/F+C1Cl/F+Cl and positive correlationship between copper and sulfur. They are strictly controlled by such factors as rock properties, strata and structures. Among the ore-bearing horizons(C2+3) of syngenetic sedimentary-transformed copper deposits, the dolomite which serves as “ore protore layers” has the highest fluorine content, suggesting that the mixed hydrothermal solution must have derived copper from the upper(Permian) and lower(Silurian)strata during circulation, and superimposition and transformation might have taken place as solution migrated through the “ore protore layers” which resulted in the formation of thick and rick orebodies. The dolomite “ore protore layers” in Middle and Upper should therefore be regarded as an important indicator in the prospecting for sedimentary-hydrothermal superimposition-transformation copper deposits of dongguashan type in the middle and lower reaches of the Yangzi River．
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徐詠雪，张桂兰，李嘉曾.1985.冬瓜山铜矿床卤族元素的分布特征及其与成矿的关系[J].矿床地质,4(1):90~96.1985.The distribution of halogen elements in the Dongguashan copper ore deposlts and its relationship with mineralization[J].Mineral Deposits4(1):90~96
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