摘要
遵循由已知推测未知的原则,在河南洛宁县石寨沟已知矿体剖面进行标准样品的最佳热释温度测试可行性实验。共采集21件土壤样品,以热释汞的峰值为标准并结合已知矿体剖面地质情况,找出土壤热释汞的最佳热释温度测试条件。通过土壤热释汞赋存分析,明确汞的赋存形态主要为硫化物(HgS)。通过热释温度可行性试验,结合Au,Cu,Pb,Zn元素进行特征分析,260℃的土壤热释温度下能清晰的指示矿体的赋存位置,并且伴随有显著的Au,Cu,Pb,Zn异常,在PMID18号点,260℃的土壤热释温度下汞含量为9.121 8×10^(-9),地电提取金质量分数为12.33×10^(-9),土壤次生晕金质量分数为43.49×10^(-9)。经过不同热释放温度变化区间可行性试验,可知在260℃~650℃与260℃~320℃具有相似的变化趋势,均能反映已知矿体剖面的位置,与热释温度可行性试验具有相似的结果。对河南省洛宁县石龙山多金属金矿区黄土覆盖未知区域土壤样品的释放形态新做了260℃和650℃两个温度条件下异常分布特征对比,这两个温度条件下在未知区域平面异常的分布具有相似性。该方法实验结论:金矿的形成伴生汞且与硫化物成因有关。结合地质背景对该区进行找矿预测,圈定Ⅰ类找矿靶区、Ⅱ类找矿靶区、Ⅲ类找矿靶区各一个,为河南省洛宁县石龙山黄土覆盖区寻找隐伏金矿明确了方向。
Following the principles known to be extrapolated, The best pyrolysis temperature test feasibility test for the standard sample of the ore body profile in Shizhaigou,Luoning County of Henan Province. A total of 21 soil samples were collected in the Shizhaigou area of Luoning County,along a section with known ore body,for the best heat releasing experiment so as to find out the best pyrogenetic temperature testing conditions for pyromal mercury in soil on the basis of peak value of pyromal mercury and the geological conditions of the known ore body. Analysis of soil mercury content shows that the main occurrence of mercury is sulfide （HgS）. Through the feasibility test of heat releasing temperature, combined with the characteristic analysis of Au,Cu, Pb and Zn,it is realized that 260 ℃ soil pyrolysis temperature can clearly indicate the occurrence of ore bodies, as well as the associated significant Au, Cu, Pb, Zn anomalies. At PMID18, the mercury content at 260℃ of soil pyrolysis temperature is 9. 121 8× 10.9 ,geoelectric extraction gold content is 12.33 × 10.9 , with 43.49 × 10.9 gold content in the secondary halo of soil. Feasibility test of different heat releasing temperature ranges shows that there is a similar tendency of varia tion at 260℃～650 ℃ and 260 ℃～320 ℃,which reflect the location of known ore body. Similar results were found with the feasibility test of pyrolysis temperature. A comparison of the abnormal distributions of soil samples at the 260 ℃ with those at 650 ℃temperature ranges is made for the soil release pattern of the unknown loess cover area in the Shilongshan multi-metallic gold deposit,Luoning County of Henan Province. It is considered that the formation of gold is related with mercury and sulfide. Therefore,ore prospecting prediction is proposed based on the geological background in this area and a Class Ⅰ ,a Class Ⅱ and a Class Ⅲ ore prospecting targets are delineated, which provides prospecting direction for the area.
作者
周子俣
罗先熔
文美兰
刘攀峰
刘延斌
彭琼斌
ZHOU Ziyu;LUO Xianrong;WEN Meilan;LIU Panfeng;LIU Yanbin;PENG Qiongbin(Department of Earth Sciences ,Guilin University of Technology, Institute of Prediction for Hidden Deposit,Guangxi guilin 541006,China;The Forth Institute of Geological Exploration, Bureau of Geology and Mineral Resources of Henan,Zhengzhou 450001 ,China)
出处
《矿物岩石》
CAS
CSCD
北大核心
2018年第2期49-58,共10页
Mineralogy and Petrology
基金
国家重点研发计划项目(基金项目编号:2016YFC06006-3)
中国地质调查局"独立供电偶极子地电化学技术规范化研究"项目(基金项目编号:1212011120207)
关键词
河南洛宁
土壤热释汞
热释温度
赋存形态
找矿预测
Henan Luoning
soil pyrosol
heat release temperature
mode of occurrence
prospec-ting prognosis
