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铜山岭花岗闪长斑岩位于东南地洼区赣桂地洼系的西南部,是地洼阶段激烈期形成的幔壳同熔型钙碱系列的岩浆岩。 本文从岩体和蚀变带的硅酸盐成分,微量元素的组成和含量,岩体和矿化蚀变带中黄铁矿,黑云母,锆石,镁铬铁矿中的微量元素的组成和含量以及本区硫化矿床中硫同位素的组成的研究阐述了以下几点: (1) 铜山岭花岗闪长斑岩的全部地球化学特征与东南地洼区主要含斑岩铜矿床的岩体完全一致,表明本花岗闪长斑岩是寻找斑岩铜矿床的有利岩体。 (2) 本岩体是幔壳同熔型钙碱系列的富水岩浆岩,本岩体对铜、铅、锌、银、钼等具有较大的潜在含矿性,本区的岩浆活动与成矿作用有不可分割的成因关系。形成本区岩体的岩浆在上升迁移的过程中,由于压力降低,不断析出岩浆水和成矿物质而形成含矿热液。 (3) 铜山岭花岗闪长斑岩的硅化、伊利石-水白云母化和夕卡岩化蚀变带是富含铜、铅、锌、银、钼等成矿物质和富含钾、二氧化硅的碱性热液在氧化环境中对岩体进行改造和叠加的结果。
The Tongshanling granodiorite porphyry is located in the southwestern part of the Gangudian depression in the southeastern depression area and is the magmatic rock of the mantle crust and the melt type calc-alkali series formed during the intense period of the Diwa stage. This article from the rock and alteration zone of silicate composition, composition and content of trace elements, rock and mineralized alteration zone pyrite, biotite, zircon, magnesium chromite in the trace elements And their contents and the composition of sulfur isotopes in sulphide ore deposits in this area: (1) The complete geochemical characteristics of the Tongshanling granodiorite porphyry and the rocks of the major porphyry copper deposits in the southeastern depression The body is completely consistent, indicating that the granodiorite porphyry is a favorable rock mass in search of the porphyry copper deposit. (2) This rock mass is a water-rich magmatic rock with the mantle crust and the melt type calcium-alkali series. The rock mass has great potential ore-bearing properties for copper, lead, zinc, silver and molybdenum. Mineralization has an indivisible genetic relationship. During the process of uplift and migration, the magma forming the rock mass of this area formed the ore-bearing hydrothermal fluids due to the pressure drop and the continuous precipitation of magmatic water and ore-forming materials. (3) Silicification of Tongshanling granodiorite porphyry, illite-water muscovite and skarn alteration zone are rich in copper, lead, zinc, silver, molybdenum and other metallogenic materials and rich in potassium, The basic hydrothermal fluids of silica have been modified and superimposed on the rock mass in an oxidizing environment.