摘要
对湖南衡阳盆地的车江铜矿进行了较为深入的研究。研究结果表明，车江铜矿是一种低温沉积型铜矿，其成因与有机质密切相关，经历了沉积富集。
The Chejiang deposit is located in Hengyang basin, Hunan Province, and the copper deposit is lithologically divisible evidently into two types:cupreous mudstone and cupreous sandstone, both containing a great deal of organic matter. Studies indicate that organic carbon in the copper deposit ranges from 0 2% to 11 74% whereas organic detritus from 4 82% to 21 08% Copper content and copper minerals have positive correlation with orga nic carbon and organic detritus It is observed under microscope that copper minerals are invariably associated with organic detritus, suggesting the genetic connection between the copper deposit and organic matter. The δ 34 S values in the range of -19 02‰～-39 31‰ show features of biogenic and/or sedimentary origin. Co/Ni ratios of the copper deposit range from 0 43 to 1 84 (0 94 on the average), implying features of sedimentary origin. The colitic mudstone type copper deposit shows enrichment of uranium anomaly, and the maximum uranium content is as high as 842×10 -6 , reaching the grade of a poor uranium deposit. The reflectance of the organic matter from the Chejiang copper deposit ranges from 0 601% to 0 642%. On the basis of Bostick's graphic interpretation, the ore forming temperature is estimated to be between 81℃ and 95℃, quite consistent with the temperature (93℃) obtained from the ore microscopy analysis. This suggests that the Chejiang copper deposit was formed at low temperature. A multidisciplinary analysis indicates that the Chejiang copper deposit is a low temperature sedimentary type deposit which underwent sedimentation diagenetic enrichment and supergene enrichment.
出处
《矿床地质》
CAS
CSCD
北大核心
1997年第3期243-253,共11页
Mineral Deposits
基金
中国科学院资助
关键词
有机质
矿床成因
成矿模式
铜矿床
copper deposit, organic matter, red formation, genesis of ore deposit, metallogenic model, Dongjiang
