| 高明,曹渊,俎新许.河南省西峡县龙回沟金矿床地球物理、地球化学特征及找矿前景[J].矿产勘查,2025,16(10):2289-2300 |
| 河南省西峡县龙回沟金矿床地球物理、地球化学特征及找矿前景 |
| Geophysical and geochemical characteristics and prospecting potential analysis of the Longhuigou gold deposit, Xixia County, Henan Province |
| 投稿时间：2025-06-30 |
| DOI：10.20008/j.kckc.202510006 |
| 中文关键词: 龙回沟金矿床 地球物理特征 地球化学异常 找矿标志 西峡县 秦岭造山带 |
| 英文关键词: Longhuigou gold deposit geophysical characteristics geochemical anomalies prospecting indica.tors Xixia County Qinling Orogenic Belt |
| 基金项目:本文受河南省2010年度省级探矿权采矿权使用费及价款(地勘基金)(102)资助。 |
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| 中文摘要: |
| 河南省西峡县龙回沟金矿床位于秦岭造山带东段，属南秦岭铅锌金银铜成矿亚带，成矿地质条件优越。为研究该区综合地球物理特征和地球化学特征，寻找深部隐伏金矿体，本文以元古宙和古生代岩体为研究目标，通过高精度磁测、激电中梯、可控音频大地电磁测深等物探方法以及水系沉积物及岩石剖面测量等化探方法，探讨它们的特征，及其与金成矿的相关性，并进行深部找矿预测。研究表明，该区石英脉型金矿化体具显著高阻、中等极化特征，分布于负磁场过渡带。地球化学分析圈定 Au-As-Sb-Ag综合异常(面积 15.54 km2)，Au异常峰值达 963×10-9浓度分带明显。通过以上研究，圈定区内 5条含金蚀变带(P1~P5)，受北西向断裂及元古宙—古生代中，酸性侵入岩控制。总长度达 760~1600 m，矿体平均厚度 0.20~1.73 m，金品位 0.61~16.57 g/t。综合地质、物探、化探标志，认为深部具较大找矿潜力，邻区相似构造部位前景良好。 |
| 英文摘要: |
| The Longhuigou gold deposit in Xixia County, Henan Province is located in the eastern segment ofthe Qinling Orogenic Belt, belonging to the South Qinling Pb-Zn-Au-Ag-Cu metallogenic subzone, with superior metallogenic geological conditions. To study the comprehensive geophysical and geochemical characteristics of thisarea and search for deep concealed gold ore bodies, this paper takes Proterozoic and Paleozoic rocks as the researchtargets. Through geophysical methods including high-precision magnetic surveys, induced polarization gradient ar.ray measurements, and controlled-source audio-frequency magnetotelluric soundings, combined with geochemicalmethods such as stream sediment sampling and rock profile measurements, we investigated the characteristics of ex.ploration targets, their correlation with gold mineralization, and conducted deep mineral exploration targeting. Thestudy shows that the quartz-vein type gold mineralization bodies in this area exhibit distinctively high resistivityand moderate chargeability characteristics, distributed in the transition zone of negative magnetic fields. Geochemi.cal analysis has outlined an Au-As-Sb-Ag comprehensive anomaly (area: 15.54 km2), with the peak value of theAu anomaly reaching 963×10-9 and obvious concentration zoning. Through the above work, five gold-bearing altera.tion zones (P1-P5) have been delineated in the area, controlled by NW-trending faults and Proterozoic-Paleozoicintermediate-acid intrusive rocks. The total length ranges from 760 to 1600 m, the average thickness of the ore bod.ies is 0.20-1.73 m, the gold grade is 0.61-16.57 g/t. Based on comprehensive geological, geophysical, and geo.chemical indicators, it is considered that there is great prospecting potential in the deep part, and the similar struc.tural positions in the adjacent areas have good prospects. |
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