|
|||||
|
|
| 河南省老湾金矿床地球化学特征及矿床成因 | |
| 引用本文： | 陈良,戴立军,王铁军,罗平,夏国体.河南省老湾金矿床地球化学特征及矿床成因[J].现代地质,2009,23(2). |
| 作者姓名： | 陈良 戴立军 王铁军 罗平 夏国体 |
| 作者单位： | 1. 中国地质大学,地球科学与资源学院,北京,100083 2. 中钢集团,天津地质研究院,天津,300061 3. 中国冶金地质总局,昆明地质勘查院,云南,昆明,650203 |
| 基金项目： | 国家自然科学基金重点项目 |
| 摘 要： | 在详细分析河南省老湾金矿床成矿地质背景、矿床地质特征的基础上,研究该矿床流体包裹体和氢、氧、硫、铅同位素,结果表明该金矿床的成矿流体为中低温、低盐度的富CO2的K+-Na+-C l--SO42-体系。氧、氢同位素分析显示,成矿流体1δ8O值变化于-5.25‰~+5.37‰,δD变化于-67‰~-76‰,表明成矿流体主要来源于岩浆水和大气降水;硫化物的3δ4S值变化于-0.1‰~+5.3‰,平均值为+3.98‰,显示深源硫的特征;Pb同位素组成显示铅主要来源于地幔,有少量地壳铅的加入。综合研究表明,老湾金矿床为受韧性剪切带控制的中—低温热液构造蚀变岩型金矿床。 |
| 关 键 词： | 地球化学 流体包裹体 成矿流体 矿床成因 老湾金矿 河南 |
Geochemical Characteristics and Genesis of the Laowan Gold Deposit in Henan Province |
|
| CHEN Liang,DAI Li-jun,WANG Tie-jun,LUO Ping,XIA Guo-ti.Geochemical Characteristics and Genesis of the Laowan Gold Deposit in Henan Province[J].Geoscience——Journal of Graduate School,China University of Geosciences,2009,23(2). | |
| Authors: | CHEN Liang DAI Li-jun WANG Tie-jun LUO Ping XIA Guo-ti |
| Abstract: | On the basis of detailed investigation of geological setting and ore deposit geologic features,this study analyses quartz-hosted fluid inclusions and oxygen and hydrogen isotope composition of quartz,as well as sulfur and lead isotope composition of sulfides from the Laowan gold deposit in Henan Province.The ore-forming fluid of the Laowan gold deposit is of the CO2-rich K+-Na+-Cl——SO2-4 system with middle-low temperature and low salinity.Oxygen and hydrogen isotope analyses show that δ18O and δD values range from-5.25‰ to +5.37‰ and-67‰ to-76‰,respectively,which indicates that the ore-forming fluid of the Laowan gold deposit is derived from magmatic and meteoric water.The δ34S values of sulfides associated with gold mineralization range from-0.1‰ to+5.3‰ with a mean of +3.98‰,indicating typical signature of deep source sulfur.The characteristics of lead isotope indicate that it was mainly derived from the mantle,partly from the crust.Comprehensive research shows that Laowan gold deposit is a mesothermal-epithermal tectonic altered type gold deposit controlled by ductile shear zone. |
| Keywords: | geochemistry fluid inclusion ore-forming fluid genesis of ore deposit Laowan gold deposit Henan |
| 本文献已被 维普 万方数据 等数据库收录！ | |