全文快速搜索:          
引用本文:李赛赛1,2 魏刚锋1,2 崔敏利3. 陕西勉县王家沟金矿区物化探勘查技术应用及找矿预测[J]. 中国地质, 2012, 39(2): 474-485.
LI Sai-sai1,2, WEI Gang-feng1,2, CUI Min-li3. The application of geophysical and geochemical exploration and metallogenic prediction in the Wangjiagou gold ore district of Mianxian County, Shaanxi Province[J]. Geology in China, 2012, 39(2): 474-485(in Chinese with English abstract).
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1097次   下载 1859 本文二维码信息
码上扫一扫!
分享到: 微信 更多
陕西勉县王家沟金矿区物化探勘查技术应用及找矿预测
李赛赛1,2 魏刚锋1,2 崔敏利31,2,3
1.长安大学地球科学与资源学院,陕西 西安 710054;2. 长安大学西部矿产资源与地质工程教育部重点实验室,陕西西安 710054;3.中国科学院地质与地球物理研究所矿产资源研究重点实验室,北京 100029
摘要:
提要:通过对区域成矿规律研究,总结勉略宁三角区南部成矿带的找矿标志为:①地层为元古宇基底变质火山岩系及靠近该岩系的碎屑岩、碳酸盐岩沉积;②呈NE—NNE向的断裂构造活动发育;③沿构造充填的中基性—基性岩脉发育区;④Au、Ag、Cu、Zn等为代表的地球化学异常区。对研究区进行成矿条件分析,认为区内具有寻找与断裂构造有关金矿的有利条件。首先选用激电中梯法在矿区快速准确地圈定了Ⅰ、Ⅱ两个NE向平行排列的高极化率、中低电阻率异常带,然后垂直异常带布置了两条单极—偶极测深及土壤地球化学剖面,结合地质资料进行解译,预测这两个异常带是由两个隐伏的含矿断裂构造引起的。布置硐探工程进行验证,在Ⅰ号异常带下部发现一条含多金属硫化物的石英脉型金矿体,推测规模和强度均大于Ⅰ号的Ⅱ号异常带下部存在更大规模的金矿体。
关键词:  勉略宁三角区  金矿  激电中间梯度法  土壤地球化学测量  隐伏断裂构造
DOI:
分类号:
基金项目:陕西省国土资源厅矿产勘查项目(T61120080402010636)资助。
The application of geophysical and geochemical exploration and metallogenic prediction in the Wangjiagou gold ore district of Mianxian County, Shaanxi Province
LI Sai-sai1,2, WEI Gang-feng1,2, CUI Min-li31,2,3
1. School of Earth Sciences and Resources, Chang’an University, Xi’an, Shaanxi 710054, China;2. Key Laboratory of Western Mineral Resource and Geological Engineering of Ministry of Education, Chang’an University, Xi’an, Shaanxi 710054, China;3. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Abstract:
Abstract:Based on a study of regional metallogenic regularity, this paper summarizes the prospecting criteria for the southern metallogenic belt in the Mian-Lue-Ning triangle area as follows: ① strata composed of Proterozoic basement metamorphic volcanic rocks and adjacent clastic rock and carbonate rocks; ② well-developed NE-NNE trending faults; ③ areas where fractures are filled with intermediate-basic veins; ④ geochemical anomaly areas of such elements as Au, Ag, Cu and Zn. The authors analyzed the metallogenic conditions of the study area and considered that the study area had favorable conditions in search for gold deposits related to fractures. First, using the IP intermediate gradient method, the authors quickly and accurately delineated two parallel NE-trending anomaly zones (No.Ⅰ, No. Ⅱ) which had high polarizability and low resistivity, and then disposed two polarization pole-dipole array sounding and soil geochemical profiles perpendicular to the anomaly zones. Combining geological data with interpretation, the authors predicted that the two anomaly zones were caused by two concealed ore-bearing fractures. Using adit engineering under the No.Ⅰ anomaly zone, the authors found a quartz vein type gold ore body which contained polymetallic sulfides. It is thus inferred that there exists a larger gold ore body under the No. Ⅱ anomaly zone, which has stronger and greater anomaly intensity than No.Ⅰ.
Key words:  Mian-Lue-Ning triangle area  gold deposit  IP intermediate gradient method  soil geochemical survey  buried fault