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我国华南地区普遍发育以浅变质和未变质的碳酸盐岩为围岩的金属矿床,如广西栗木锡矿、湖南黄沙坪、湖南锡田、湖南柿竹园等。湖南黄沙坪、柿竹园都是我国南岭地区著名的矽卡岩型矿床,但是,同样以碳酸盐岩为赋矿围岩的广西栗木矿床,虽然成矿岩体与地层直接接触,但并未形成矽卡岩型矿化,甚至围岩都没有出现矽卡岩化蚀变,这不得不引起我们注意。对比柿竹园和黄沙坪矿床的碳氧同位素特征及其他岩浆岩特点,得出一些有意义认识。
China’s southern China generally developed shallow metamorphic and non-metamorphic carbonate rocks as the surrounding rock metal deposits, such as Guangxi Li Mu tin, Hunan Shashaping, Tin Tin Hunan, Hunan Shushuanyuan. Hunan Huangshaping and Shushuyuan are all well-known skarn deposits in Nanling area of China. However, although the ore-forming rock mass is in direct contact with the strata in the Guangxi Li Mu deposit, which is also composed of carbonate rocks, No skarn-type mineralization was formed and no skarn alteration was observed in the surrounding rock. This caused us to pay attention. By comparing the carbon and oxygen isotopic characteristics of the Shizhuyuan and Huangshaping deposits with the features of other magmatic rocks, some meaningful understandings were obtained.