江西九江城门山铜多金属矿床土壤轻烃找矿试验  

Experiment of soil light hydrocarbon prospecting in Chengmenshan copper-polymetallic deposit,Jiujiang,Jiangxi,China

作　　者：王永华[1,2] 龚敏[1] 龚鹏[1] 熊燃[1] 赵波[1] 曾键年[1] 马振东[1] 

机构地区：[1]中国地质大学,湖北武汉430074 [2]中国地质调查局成都地质矿产研究所,四川成都610081

出　　处：《地质通报》2010年第7期1056-1061,共6页Geological Bulletin of China

基　　金：中国地质调查局<资源与环境地球化学勘查与评价方法技术研究和推广>子项目(编号:1212010660404)资助

摘　　要：在开展城门山矿区新一轮的深部外围找矿过程中,传统的化探方法存在一定的局限性。本次工作在城门山矿区内蚀变矿化石英斑岩、矿区外围石英砂岩上方发育的土壤垂直剖面和1线、9线、J0线土壤测线中开展了系统的轻烃测量,尝试利用土壤轻烃异常示踪下伏的矿化信息。研究结果表明,除甲烷(C1)外,土壤轻烃(C2、C3、C4、C5)都能很好地示踪下伏的矿化信息,在花岗闪长斑岩(矿体)上方显示低值区,与土壤Hg气、磁化率高值形成镶嵌结构。通过对硫化物矿体上覆土壤的有机烃组分相关特征和变化规律的分析,可提出预测下伏矿体的评价指标,也有助于了解有机质在成矿作用过程中的赋存状态和演化规律。During the process of carrying out a new round of deep and periphery mining prospecting in Chengmenshan deposit, there are some limitations for the traditional geochemical methods. We＇ve carried out a systematic measurement of light hydrocarbon at vertical soils profile of alterative and mineralized quartz porphyry within the mining area, surrounding quartz sandstone and on the soil line of 1-line, 9-line, J0-1ine. We try to trace the underlying mineralization information by using soil light hydrocarbon anomalies. The results show that, in addition to methane （C1）, the soil light hydrocarbons （C2, C3, C4, C5）, showing low value areas above the granodiorite porphyry body （ore）, can be a good tracer of the underlying mineralization information and form a mosaic structure with the high-value of soil Hg gas and magnetic susceptibility. Through the analysis of characteristics and variation of overlying soil organic hydrocarbon components of sulfide ore body, we can put forward predictive indicators for the evaluation of the underlying ore bodies. It is helpful to understand the occurrence and evolution of organic matter in the process of mineralization.

关 键 词：江西 城门山铜多金属矿床 土壤 轻烃 地球化学特征 

分 类 号：P618.41[天文地球—矿床学]