摘要
桃林铅锌矿位于钦杭成矿带,矿区出露幕阜山花岗岩体,岩性为中粗粒黑云母二长花岗岩。通过研究,得出该岩石符合中国东部埃达克岩(C型埃达克岩)特征,其具有高的SiO2(>70%)和Al2O(314.61%-14.73%)含量,中等高K2O/Na2O比值(﹥1),高的Sr含量,低的Yb和Y含量,高的Sr/Y和La/Yb比值,富轻稀土元素(LREE),贫重稀土元素(HREE),球粒陨石标准化的REE配分模式为右倾斜、HREE平坦配分模式,此外花岗岩体还富集成矿元素。桃林铅锌矿为桃林大断裂控制的多源热液充填矿床,中粗粒黑云母二长花岗是其一种成矿物质来源,其形成时间晚于中粗粒黑云母二长花岗岩。
The Mufushan granite is outcropping at Taolin Pb-Zn deposit which is located in Qinzhou-Hangzhou metallogenic belt. The main body of granite is biotite monzogranite. In Geochemistry, the granite has the similarity with the C-type adakitic rocks of eastern China. It is riched in SiO2 （〉70%）, Al2O3 （14.61% - 14.73%） and Sr. And it is depleted in Yb and Y. The granite had high ratio of K2O/Na2O, Sr/Y and La/Yb. It was obvious that the granite is enriched in LREE and LILE, and depleted in HREE and HFSE. It has right-dip chondrite-normalized REE pattern and fiat HREE distribution. The ore-forming elements are rich in Mufushan granite. Taolin Pb-Zn deposit which was controlled by the Taolin-fault was the complex-sources hy-drothermal filling deposits. The biotite monzogranite was one of the sources of ore-forming materials.
出处
《华南地质与矿产》
CAS
2012年第4期307-314,共8页
Geology and Mineral Resources of South China
基金
中国地质调查局"钦杭成矿带(西段)重要金属矿床成矿规律及找矿方向研究"
关键词
桃林铅锌矿
成矿物质来源
花岗岩
钦杭成矿带
Taolin Pb-Zn deposit
granite
ore-forming material source
Qinzhou-Hangzhou metallogenic belt
