地质找矿论丛2011，Vol.26Issue(2)：188-194,7.
甘肃西成盆地小沟里-三羊坝金矿床地球化学特征
Geochemical characteristics of Xiaogouli-Sanyangba gold deposit of Xihe-Chengxian basin in Gansu province
康亚龙 1刘继顺 1张旺定 2尹利君1
作者信息
- 1. 中南大学地学与环境工程学院,长沙410083
- 2. 新疆维吾尔自治区有色地质矿产勘查院,乌鲁木齐830000
- 折叠
摘要
Abstract
On the basis of detailed investigation of geological setting and ore deposit features, this paper deals with geochemistry and sulfur and lead isotopes of Xiaogouli-Sanyangba gold deposit in Xihe-Chengxian basin, Gansu province. The results show that the Co/Ni of pyrite is mostly more than 1 indicating that the ore-forming material is derived from magmatic-hydrothermal fluid. The total REE and LREE/HREE from 6.07 × 10－6 to 227.20 × 10－6 , and from 1. 372 to 4. 582 with light REE enrichment. The REE pattern of surrounding rocks is similar to that of ores and gold-bearing quartz veins. The normalized REE pattern is gently right inclined with weak Eu negative anomaly. The sulfur isotope composition is δ(34 S) from －6.15 × 10-3 to ＋13.62 × 10-3 with typical multi-resource signature of fluid. The lead isotope composition is of the mixed crust-mantle origin. Mineral inclusions is mainly in 2 phases, gas and liquid. Analysis showed that in liquid pahse Na+ ,K+ are the dominant cation and CI- the dominant anion, in gas phase H2O and CO2 dominant. The homogenization temperature,salinity range in 115 ℃ to 205 ℃ and 7.2％ to 11.5％ respectively. The ore fluid is mainly composed of meteoric water.关键词
小沟里-三羊坝金矿床/矿床地球化学/稀土元素地球化学/包裹体地球化学/西成盆地/甘肃省Key words
geochemistry/ Xiaogouli-Sanyangba gold deposit/ REE geochemistry/ Xihe-Chengxian basin fluid enclusion geochemistry/ Gansu province分类
天文与地球科学引用本文复制引用
康亚龙,刘继顺,张旺定,尹利君..甘肃西成盆地小沟里-三羊坝金矿床地球化学特征[J].地质找矿论丛,2011,26(2):188-194,7.
