| 论“东川式铜矿”的成因 |
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| 引用本文： | 龚琳,王承尧.论“东川式铜矿”的成因[J].地质科学,1981,0(3):203-211. |
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| 作者姓名： | 龚琳 王承尧 |
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| 作者单位： | 西南冶金地质勘探公司 |
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| 摘 要： | 云南东川地区,元古界昆阳群落雪白云岩中规模巨大的层状铜矿,1941年由谢家荣命名为“东川式铜矿”1],用以代表与闪长岩有关的岩浆热液矿床。李洪谟、王尚文(1941年)、孟宪民等(1948年)3]对这一成因观点都有详细的论述。1960年后,孟宪民指出,东川铜矿可能为沉积成因。笔者在东川白锡腊、因民、落雪、汤丹等地,发现铜矿床中保留了很多沉积成岩的标志,同时根据脉状铜矿是变质脉、岩浆岩的同位素年龄小于层状铜矿等特征,从而提出了沉积变质的成因认识。1975年,桂林冶金地质研究所提出此类矿床应更名为火山—沉积—浅变质矿床4]。近年来,通过对含矿层的岩相和岩石学的研究、铜矿与藻类叠层石关系的研究,笔者认为,“东川式铜矿”的成因不是单一的,是沉积成岩、蒸发成岩、变质改造等多成因、多阶段形成的一种复合矿床,本文就此进行了探讨。
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| 关 键 词： | , |
| 收稿时间： | 1979-11-15 |
| 修稿时间： | 1979-11-15; |
ON THE ORIGIN OF "DONGCHUAN TYPE" COPPER DEPOSIT |
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| Gong Lin,Wang Chengyao.ON THE ORIGIN OF "DONGCHUAN TYPE" COPPER DEPOSIT[J].Chinese Journal of Geology,1981,0(3):203-211. |
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| Authors: | Gong Lin Wang Chengyao |
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| Institution: | The Southwest Prospecting Company of Metellurgic, Geology, Kunming |
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| Abstract: | The stratiform copper deposits in Laoxue Dolomite of Proterozoic Kunyang Group in Dongchuari district,Yunnan province,are known as "Dongchuan type" copper deposit.As to its origin there was a hydrothermal opinion of residual magma differentiation.The authors of this paper have the opinion that such type of deposits has a complex character covering mineralization processes of scdimentation-diagenesis,evaporation-diagenesis as well as metamorphism-reformation.It can be summarized as follows:1)Copper-bearing minerals constitute various sedimentary structure,such as cross laminations,ripples,cyclothem,Oolitic,syngenetic conglomerate and so on.2)The distribution and enrichment of copper ores are controlled by stratigraphy,sedimentary-facies,lithology and sedimento- and bio- geochemical environment.3)The association of copper minerals with diagenetic dolomite,gypsum,authigenic quartz and the absorption of copper minerals by algae indicated that the bedded copper orebodies and the original ore formations were formed in diagenetic process.4)An inheritable relationship between the stratiform copper deposits and the metamorphosed vein shows that having formed,the stratiform copper deposits have suffered the regional metamorphism,the contact metarnorphism and the faulting displacement. |
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