青海松树南沟金矿区土壤地球化学特征及异常评价

doi:10.11720/wtyht.2025.0123

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摘要

松树南沟金矿区位于北祁连成矿带中部,目前发现有东、西两个矿床,累计探获Au资源量超34 t,已达大型金矿规模,矿区找矿潜力巨大,亟须开展找矿方向研究,为找矿勘查工作部署提供支撑。为此,本文通过1∶10 000土壤地球化学异常分析,利用两窗口移动平均法查明了该区Au、As、Sb、Hg、Cu、Pb、Zn、Ag、W、Mo共10种元素的异常分布特征及富集规律;基于元素地球化学异常数据解析,综合研究区成矿地质条件,采用平均衬度法圈定综合异常区,并进行异常评价。研究结果表明:Au是矿区的主要成矿元素,呈现强富集、强变异特征,具有较大的成矿潜力;矿区内共圈定土壤地球化学综合异常区7个,其中HP-1、HP-2和HP-5综合异常找矿潜力最大。经工程验证,HP-2异常新发现矿(化)体见矿厚度达1.5 m,金品位达到0.57 g/t;HP-5综合异常新发现矿(化)体见矿厚度达1.42 m,品位达到1.67 g/t。本研究为松树南沟金矿区的找矿方向提供了地球化学依据,为矿区下一步的矿产勘查工作部署提供了参考。

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	陈庚户
	郎兴海
	王兆帅
	董维财
	王登科
	向佐朋
	李壮
	叶紫枫
	吴昌益
	王旭辉
	吴天文
	罗超

关键词 ：松树南沟金矿, 土壤地球化学特征, 综合异常, 成矿预测, 北祁连造山带

Abstract：

The Songshunangou gold mining area in Qinghai Province is situated in the central part of the North Qilian metallogenic/orogenic belt. Two deposits have been identified in its eastern and western portions, with cumulative proven Au resources exceeding 34 t, establishing them as large-scale deposits. Moreover, the area holds significant potential for ore prospecting, necessitating an urgent need for research into prospecting orientations to support mineral exploration efforts. Hence, based on the anomaly analysis of 1∶10 000 soil geochemical survey data and employing the two-window moving average method, this study identified the anomaly distributions and enrichment patterns of 10 elements (i.e., Au, As, Sb, Hg, Cu, Pb, Zn, Ag, W, and Mo) in the area. By analyzing elemental geochemical anomaly data and integrating the geological conditions for mineralization, this study delineated composite anomaly zones in the area using the average contrast method, followed by anomaly assessments. The results indicate that Au is the primary ore-forming element in the area, characterized by strong enrichment and significant variability, suggesting high mineralization potential. Seven composite soil geochemical anomaly zones were delineated in the area, with zones HP-1, HP-2, and HP-5 demonstrating the greatest potential for mineral exploration. Engineering validation confirms the presence of two ore/mineralized bodies, with one exhibiting an ore thickness of 1.5 m and a gold grade of 0.57 g/t in zone HP-2 and the other featuring an ore thickness of 1.42 m and a gold grade of 1.67 g/t in zone HP-5. Overall, this study provides geochemical evidence for determining prospecting orientations in the Songshunangou gold mining area while offering a reference for the deployment of subsequent mineral exploration work in the area.

Key words： Songshunangou gold mining area soil geochemical characteristics composite anomaly metallogenic prediction North Qilian orogenic belt

收稿日期: 2025-04-07 修回日期: 2025-08-29 出版日期: 2025-12-20

ZTFLH:

P632.1

基金资助:国家自然科学基金项目(42572103);国家重点研发计划项目(2022YFC2905000);自然资源部新一轮找矿突破战略行动科技支撑项目(ZKKJ202405);自然资源部新一轮找矿突破战略行动科技支撑项目(ZKKJ202427);西藏自治区科技计划项目(XZ202401YD0066);四川省自然科学基金项目(2024NSFSC1954);四川省自然科学基金项目(2025ZNSFSC1196);科学技术部深地国家科技重大专项(SQ2024AAA060124-6);威海市能源资源调查评价重点实验室开放课题(LDKF-2023WH-04);成都理工大学珠峰科学研究计划项目(2020ZF11407)

通讯作者: 郎兴海

引用本文:

陈庚户, 郎兴海, 王兆帅, 董维财, 王登科, 向佐朋, 李壮, 叶紫枫, 吴昌益, 王旭辉, 吴天文, 罗超. 青海松树南沟金矿区土壤地球化学特征及异常评价[J]. 物探与化探, 2025, 49(6): 1281-1290.
CHEN Geng-Hu, LANG Xing-Hai, WANG Zhao-Shuai, DONG Wei-Cai, WANG Deng-Ke, XIANG Zuo-Peng, LI Zhuang, YE Zi-Feng, WU Chang-Yi, WANG Xu-Hui, WU Tian-Wen, LUO Chao. Geochemical characteristics and anomaly assessments of soils in the Songshunangou gold mining area, Qinghai Province. Geophysical and Geochemical Exploration, 2025, 49(6): 1281-1290.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2025.0123 或 https://www.wutanyuhuatan.com/CN/Y2025/V49/I6/1281

Fig.1 松树南沟金矿区大地构造位置(a)及地质简图(b)

Fig.2 松树南沟矿区土壤地球化学测量采样范围(地质简图见图1)

Table 1 松树南沟矿区土壤地球化学参数

Fig.3 松树南沟矿区土壤地球化学元素相关矩阵

Fig.4 松树南沟矿区土壤地球化学元素R型聚类分析谱系

Table 2 松树南沟矿区因子分析结果

Table 3 松树南沟矿区因子分析结果

Fig.5 松树南沟矿区土壤元素异常分布

Fig.6 松树南沟矿区土壤元素综合异常分布

Table 4 松树南沟矿区找矿模型

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