Comprehensive information model construction and target area prediction for gold prospecting in the Weishancheng area, Tongbai County, Henan

doi:10.13745/j.esf.sf.2023.11.63

Abstract

Abstract:

The exploration and discovery of hidden and deep ore deposits represent a scientific frontier and a key research focus in the field of mineral exploration. Large-scale prospecting prediction is a critical approach to achieving scientific prospecting and directly supports mineral exploration efforts. Guided by the prospecting prediction theory and methodology of metallogenic geological bodies, this study focuses on the Yindongpo gold deposit as the primary research object. Building on a systematic review of previous research, a geological model for ore-prospecting prediction is constructed, emphasizing metallogenic geological bodies, metallogenic structures, metallogenic structural planes, and metallogenic characteristics. This model aims to provide a framework and demonstration for large-scale gold-polymetallic ore prediction in the region. The Yindongpo gold deposit is identified as a magmatic hydrothermal deposit associated with intrusive magmatic activity. The metallogenic geological body is a medium-acid concealed rock mass formed during the Early Cretaceous. The metallogenic structure is primarily a fold-related metallogenic structural system, while the metallogenic structural planes include lithologic interfaces (e.g., silica-calcium planes), fold-related structural planes, and potentially intrusive-related structural planes. The macro-alteration features of mineralization are dominated by silicification and pyrite-sericitization. Metallogenic elements exhibit near-range Pb, Zn, and Ag mineralization associated with Au, and remote Au mineralization associated with Pb, Zn, and Ag. By integrating geophysical and geochemical exploration data, a comprehensive information model for ore-prospecting prediction was developed. Five prospecting target areas were delineated, and subsequent drilling verification resulted in significant prospecting breakthroughs.

Key words: Yindongpo gold deposit, magmatic hydrothermal system, metallogenic geological body, prospecting prediction, geological model

CLC Number:

P612
P618.51

ZHANG Xiaofei, TANG Xiangwei, PANG Zhenshan, XUE Jianling, CHEN Hui, WANG Junlu, WEI Hantao, LEI Xiaoli. Comprehensive information model construction and target area prediction for gold prospecting in the Weishancheng area, Tongbai County, Henan[J]. Earth Science Frontiers, 2025, 32(2): 357-370.

Figures/Tables 11

References 50

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时代	岩体或矿床名称	测年方法	年龄/Ma	资料来源
成岩时代	铜山岩体	LA-ICP-MS锆石U-Pb年龄	131	[29]
	梁湾岩体	LA-ICP-MS锆石U-Pb年龄	130	[30]
		SHRIMP锆石U-Pb年龄	137	[31]
		SHRIMP锆石U-Pb年龄	133	[31]
	天目山岩体	LA-ICP-MS锆石U-Pb年龄	133~132	[16]
	天目山岩体	LA-ICP-MS锆石U-Pb年龄	123	[32]
	老湾岩体	LA-ICP-MS锆石U-Pb年龄	129	[33]
	老湾岩体	SHRIMP 锆石U-Pb	133	[25]
	七尖峰岩体	LA-ICP-MS锆石U-Pb年龄	139~135	[30]
	银洞坡金矿深部含矿花岗斑岩	LA-ICP-MS锆石U-Pb年龄	127	[16]
成矿时代	银洞坡金矿	LA-ICP-MS独居石U-Pb年龄	127	[21]
		⁴⁰Ar/³⁹Ar年龄(蚀变阶段绢云母)	133	[21]
		⁴⁰Ar/³⁹Ar年龄(多金属硫化物阶段绢云母)	131	[21]
	破山银矿	K-Ar(碳质绢云石英片岩)	104	[34]
	老湾金矿	LA-ICP-MS金红石 U-Pb年龄	128~124	[14]

时代	岩体或矿床名称	测年方法	年龄/Ma	资料来源
成岩时代	铜山岩体	LA-ICP-MS锆石U-Pb年龄	131	[29]
	梁湾岩体	LA-ICP-MS锆石U-Pb年龄	130	[30]
		SHRIMP锆石U-Pb年龄	137	[31]
		SHRIMP锆石U-Pb年龄	133	[31]
	天目山岩体	LA-ICP-MS锆石U-Pb年龄	133~132	[16]
	天目山岩体	LA-ICP-MS锆石U-Pb年龄	123	[32]
	老湾岩体	LA-ICP-MS锆石U-Pb年龄	129	[33]
	老湾岩体	SHRIMP 锆石U-Pb	133	[25]
	七尖峰岩体	LA-ICP-MS锆石U-Pb年龄	139~135	[30]
	银洞坡金矿深部含矿花岗斑岩	LA-ICP-MS锆石U-Pb年龄	127	[16]
成矿时代	银洞坡金矿	LA-ICP-MS独居石U-Pb年龄	127	[21]
		⁴⁰Ar/³⁹Ar年龄(蚀变阶段绢云母)	133	[21]
		⁴⁰Ar/³⁹Ar年龄(多金属硫化物阶段绢云母)	131	[21]
	破山银矿	K-Ar(碳质绢云石英片岩)	104	[34]
	老湾金矿	LA-ICP-MS金红石 U-Pb年龄	128~124	[14]

序号	名称	化探	重力	磁法	激电	验证情况
1	张庄金矿A类找矿靶区	地表异常元素组合以Ag、Au、Zn、Pb和Cu主为;银洞坡深部钻孔(-704 m)Au、Ag、Pb、Zn、Sb、W和Mo异常发育。	位于剩余重力负异常内	位于负磁异常带上,磁异常一般在-50~150 nT之间	地表硅化、褐铁矿化发育,区内北部见大面积激电异常。极化率在0.4%~1.4%之间,电阻率相对低阻一般为400 Ω·m以下	钻孔验证,圈出多层矿体,平均金品位17.6×10^-6,银品位133×10^-6,矿体真厚度0.82~2.33 m
2	郭老庄-栾家冲金矿A类找矿靶区				圈定出5个激电异常,极化率在8%~12%,具明显的低阻高极化率特征	地表圈出1条银矿体和3条铅矿体。钻探控制深部金银矿体1条,矿体厚度0.98~2.69 m,平均金品位4.46×10^-6
3	银洞坡深部金铅锌矿A类找矿靶区(-1 050~-436 m)				深部-800 m出现激电异常,为低阻高极化率特征	钻探验证,提交矿产地1处:累计新增获得工业矿+低品位矿矿石量573万t,金金属量22 520 kg,平均品位3.93×10^-6
4	陈庄银铅锌矿B类找矿靶区				圈定出4个激电异常,具明显的低阻高极化特征。	地表圈出银矿体2条、铅锌矿体4条。矿体厚度0.80~4.38 m,银品位(47.9~497.0)×10^-6,铅+锌品位0.96%~2.77%
5	破山深部银铅锌矿A类找矿靶区					钻探验证,圈出银矿体11个,累计提交潜在银金属量456 t

序号	名称	化探	重力	磁法	激电	验证情况
1	张庄金矿A类找矿靶区	地表异常元素组合以Ag、Au、Zn、Pb和Cu主为;银洞坡深部钻孔(-704 m)Au、Ag、Pb、Zn、Sb、W和Mo异常发育。	位于剩余重力负异常内	位于负磁异常带上,磁异常一般在-50~150 nT之间	地表硅化、褐铁矿化发育,区内北部见大面积激电异常。极化率在0.4%~1.4%之间,电阻率相对低阻一般为400 Ω·m以下	钻孔验证,圈出多层矿体,平均金品位17.6×10^-6,银品位133×10^-6,矿体真厚度0.82~2.33 m
2	郭老庄-栾家冲金矿A类找矿靶区				圈定出5个激电异常,极化率在8%~12%,具明显的低阻高极化率特征	地表圈出1条银矿体和3条铅矿体。钻探控制深部金银矿体1条,矿体厚度0.98~2.69 m,平均金品位4.46×10^-6
3	银洞坡深部金铅锌矿A类找矿靶区(-1 050~-436 m)				深部-800 m出现激电异常,为低阻高极化率特征	钻探验证,提交矿产地1处:累计新增获得工业矿+低品位矿矿石量573万t,金金属量22 520 kg,平均品位3.93×10^-6
4	陈庄银铅锌矿B类找矿靶区				圈定出4个激电异常,具明显的低阻高极化特征。	地表圈出银矿体2条、铅锌矿体4条。矿体厚度0.80~4.38 m,银品位(47.9~497.0)×10^-6,铅+锌品位0.96%~2.77%
5	破山深部银铅锌矿A类找矿靶区					钻探验证,圈出银矿体11个,累计提交潜在银金属量456 t