地电化学法在豫西崤山黄土覆盖区找矿中的应用——以洛宁县石龙山预查区为例

doi:10.11720/wtyht.2019.1379

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Abstract

Xiaoshan Mountain widely covered by the Quaternary sediments is located in the west of Henan Province. Its north part is ravines crossbar, and the surface vegetation grows fully and covers the surface heavily. In order to investigate the effectiveness of the earth electrochemical method in the search for gold deposits in the Xiaoshan loess-covered area in western Henan, the authors selected Shizhaigou gold deposit which is buried in loess to carry out the feasibility test of ore prospecting, and conduct geo-electrochemical prospecting in the south of the Shillongshan gold polymetallic mineral survey area and its adjacent area of Xiaoshan. The study revealed that the electrochemical composite anomaly in the development area of the Au deposit in Shizhaigou is obvious , the elements are well correlated and they have good nesting and zoning relationships. The authors analyzed the trace element content characteristics (fractal, coefficient of variation and extraction ratio of the geoelectric extraction) extracted from the geoelectricity of Shilongshan census area and found that it has similar geoelectricity anomaly patterns to the Shizhaigou gold deposit. In addition, the authors used Surfer software to draw the contour abnormal map and, in combination with previous research results, initially verified the surface of well-arranged 45-47 surveying points along No.02 line through surface engineering, thus determining an industrial gold orebody with good reserves. It is thus proved that the measured and inferred faults F1-1 and F20 do exist. The results provide a theoretical basis for electrochemical prospecting in the search for deep deposits in the Shilongshan area and the periphery of the Shizhaigou deposit, and also provide new ideas for the prospecting work in the loess-covered loess area.

Key words： loess covered area geoelectric extraction method fractal prospecting forecast Luoning in western Henan Province

Received: 21 October 2018 Published: 10 April 2019

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	Xiao-Xiao YANG
	Xian-Rong LUO
	Mei-Lan WEN
	Fei OU-Yang
	Xing-Hai LYu
	Gao-Ke YIN
	Guang-Ming ZHENG

Cite this article:

Xiao-Xiao YANG,Xian-Rong LUO,Mei-Lan WEN, et al. The application of geo-electrochemical methods to prospecting in the loess-covered Xiaoshan Mountain, western Henan Province: A case study of the Shilongshan gold polymetallic ore prospecting area in Luoning County[J]. Geophysical and Geochemical Exploration, 2019, 43(2): 244-256.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.1379 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I2/244

Geological sketch map of the Xiaoshan Mountain in the west of Henan Province(modified according to references [19],[42])
a—geological map of the study area;b—regional structure map;c—distribution of deposits in the study area

成矿特征要素	石寨沟	金鸡山	申家窑
矿床规模	小型	小型	小型
矿床类型	构造蚀变岩型	构造蚀变岩型	构造蚀变岩型
控矿地层	中元古界长城系熊耳群中下部的许山组及马家河组	中元古界长城系熊耳群中下部的许山组及马家河组	太华群变质岩系
控矿构造	NW-NWW 向、NE-NEE 向及近 SN向,其中 NW-NWW 向和NE-NEE 向断裂为主要含矿断裂	NW、NE和近SN向断裂,其中NE向断裂破碎带是区内主要的容矿构造	矿体受NW-NNW向韧性拆离断层及叠加在其之上的脆性正断层控制,多沿断裂带产出
控矿岩体	燕山晚期花岗闪长岩、花岗斑岩	燕山晚期花岗斑岩、花岗闪长岩	燕山晚期花岗斑岩
矿石矿物成分	主要有自然金、黄铁矿、闪锌矿、方铅矿、黄铜矿	主要有自然金、银金矿、黄铁矿、黄铜矿、方铅矿、闪锌矿、菱铁矿及微量的黑钨矿、白钨矿、毒砂	黄铁矿最为常见,部分矿石样品中方铅矿有大量产出。其他金属矿物还有毒砂、黄铜矿、闪锌矿以及少量金、银矿物
脉石矿物成分	石英、绢云母、绿泥石、钾长石、铁白云石	石英、绢云母、白云石、钾长石、黑云母、重晶石、绿帘石、锆石	石英、菱铁矿,局部可见绢云母
矿石结构构造	自形—半自形结构、他形粒状结构、压碎结构、包含结构,块状构造、角砾状构造、浸染状构造	自形晶、半自形晶、它形晶粒状结构,块状构造、条带状构造、浸染状构造和晶洞状构造	自形—半自形粒状结构、他形结构、拔丝结构、压碎结构、揉皱结构为主,条带状、网脉状、团块状和晶洞构造
围岩蚀变	硅化、绢云母化、黄铁绢英岩化、碳酸盐化、绿泥石化	硅化、黄铁矿化、方铅矿化、绿泥石化、绢云母化、泥化	硅化、黄铁绢英岩化、碳酸盐化,部分绿泥石化和少量高岭土化
矿床有益组分	Au、Cu、Pb、Zn	Au、Ag、Cu、Pb、Zn	Au、Ag、Cu、Pb、Zn、As

Geological characteristics of the main gold deposits

Geoelectric extraction anomaly parameters of the test section

Geoelectrochemical anomaly characteristics of the test section

Elemental fractal statistical graphs of geoelectric extraction measurements

Elemental statistics of geoelectric extraction measurements

Distribution of geoelectric extraction lines in the Shilongshan research area

Geoelectric extraction element F1、F2 assemblage anomaly map

Engineering verification cross-section of Shilongshan research area

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