广西李家湾铜铅锌多金属矿区土壤地球化学特征及找矿预测

Soil geochemical characteristics and prospecting prediction in Lijiawan Cu-Pb-Zn polymetallic ore district,Guangxi

在研究本区地层、构造、岩浆岩、围岩蚀变等地质特征基础上,开展1/1万土壤地球化学测量工作,研究了11种测试元素的含量特征、组合特征,并进行了综合异常圈定。由元素的含量特征可知该区铜铅锌多金属元素离散程度较高,受后期地质作用改造、迁移富集特征较为明显。元素组合分析表明,该区显示出中—高温硫化物多金属热液矿化作用的特点,说明具有成矿热液的多期活动特征。通过对铜铅锌多金属土壤地球化学综合异常的圈定,认为Ⅰ、Ⅲ号综合异常带具有良好的找矿前景,为矿区今后工作的重点靶区。

Based on the geological characteristics such as stratigraphy,tectonics,magmatic rock and surrounding rock alteration in this area,1/1 million soil geochemical survey was done,the elemental content,distribution modes and combination character of 11 kinds of test elements were studied,and the single element anomaly and synthetical anomaly were marked.According to the elemental content,it is found that the discrete degree of the elements as Cu,Pb,Zn in this area are highly,the migration and enrichment is more obvious after the later geological transformation.The results of element combination analysis show that this area shows the characteristics of hydrothermal mineralization of medium-high temperature sulfide polymetallic and has the characteristics of multi-stage activities of metallogenic hydrothermal fluids.By marking the synthetical anomaly,it is considered that the two anomalies zonesⅠandⅢhave good prospecting potential and are the key target areas for the future targeting work of the mining area.