华南地质与矿产2012，Vol.28Issue(2)：149-159,11.
甘肃北山地区白山堂铜矿地质特征及成矿流体研究
Geological Features and Ore-Forming Fluid of Baishantang Copper Deposit in Beishan Area,Gansu Province
摘要
Abstract
The Beishan area in Gansu province is one of the most important metallogenic belts in China,with abundant mineral resources.Previous studies revealed that the porphyry copper deposit is the main metallogenic type in this area as represented by the Baishantang copper deposit,whereas there are rare studies on ore-forming fluid in this deposit.This work made a further study on geological characteristics of the deposit and its fluid inclusions.The results show that the fluid inclusions have simple shape,are mostly of gas-liquid two-phase type,medium to low temperature（230～260 ℃ and 160～170 ℃ of homogenization temperature in the ore bearing quartz veins and 301 ℃ of cracking temperature with chalcopyrite concomitant）,low salinity（11%～15% w（NaCleq）,averaged 11.32% w（NaCleq）;3.4%～7.7% w（NaCleq）,averaged 4.8% w（NaCleq））,moderate density（about 0.95～1.00 g/cm3） and medium to low press（about 5×103～101×103 kPa）.The deposit shows exothermal to epithermal vein type characteristics.Combined with geology feature and the series of hydrothermal vein-type,skarn-type,also porphyry-type Cu-Fe-Pb-Zn deposits distributed annularly center on the Shibanquan monzonitic granite surrounding nearby the Baishantang area,it is suggested that Baishantang copper deposit is the mineralization type of exothermal to epithermal vein type.It is the product to late stage of magmatic hydrothermal system evolution.There is some connection existed among the mineralization series surrounding Shibanquan monzonitic granite.关键词
斑岩铜矿/成矿流体/白山堂/北山地区Key words
porphyry copper deposit/ore-forming fluid/Baishantang Cu deposit,Beishan area Geological and Geochemical Characteristics of Fuzichong Lead-Zinc Ore Field,Guangxi Province分类
天文与地球科学引用本文复制引用
陕亮,郑有业,许荣科,张雨莲,曹亮..甘肃北山地区白山堂铜矿地质特征及成矿流体研究[J].华南地质与矿产,2012,28(2):149-159,11.基金项目
中国地质调查局国土资源大调查项目 （）
