海南岭头地区金土壤地球化学特征及找矿潜力分析  

Geochemical Characteristics of Gold-bearing Soil and Ore-searching Potential of the Lingtou Area, Hainan Province

作　　者：汪校锋[1,2] 矫东风[3] 秦雅东[1] 肖灯意[1] 

机构地区：[1]中国地质大学(武汉)地球科学学院,湖北武汉430074 [2]中国地质大学(武汉)青藏高原研究中心,湖北武汉430074 [3]海南省海洋地质调查研究院,海南海口570206

出　　处：《地质与勘探》2011年第3期406-413,共8页Geology and Exploration

摘　　要：根据1∶20万化探Au异常,在琼中岭头地区开展1∶1万土壤地球化学勘探工作。对获得的4813个有效土壤样品进行的Au、Cu、Mo、Hg、Pb等项目的分析测试表明,海南岭头地区Au异常普遍,II级和III级异常面积大,强度高。对硅化、黄铁矿化以及绢英岩化等蚀变岩石样品的Au等元素分析表明,区内西南部抱板群构成了海南岭头地区Au的主要赋矿岩系,230Ma左右琼中岩体的侵位及后期的NE、NW向断裂活动过程中,在岩浆热液和构造应力作用下,Au富集在岩体与抱板群的接触边界及断层带内。海南岭头地区西南部抱板群内、断裂带以及琼中岩体和抱板群的接触部位为有潜力的找矿靶区。A further geochemical exploration of the soil on a scale 1：10000 was carried out based on the gold geochemical anomaly data from the previ- ous survey of a scale 1：200000 in the Changtouling area of Hainan Province. Totally 4813 effective soil samples were collected and measured on elements Au, Cu, Mo, Hg and Pb. The resuhs show that gold anomalies prevail in the survey region with large areas and high intensity of II and III grades of the anomaly. The analysis on the samples of rocks of silieation, pyritization and phyllic alteration indicates that the Baoban Group is the major source of the Au element in this area. It is inferred that during the emplacement of the Qiongzhong granite and the following activities of NE and NW-trending faults, magma hydrothermal and tectonic stress made the element of Au enriched inside the fault zones and the contact boundary between the Baoban Group and the Qiongzhong granite in the southwest of the survey area, which are considered to be the targets with prospecting potential.

关 键 词：土壤 金异常 地球化学 蚀变岩石 岭头地区 海南 

分 类 号：P632.1[天文地球—地质矿产勘探]