北淮阳东段卢镇关群和佛子岭群地层含矿性地球化学评价
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摘要
卢镇关群和佛子岭群广泛分布于北淮阳成矿带内,但是对其含矿性研究一直较为薄弱。文章通过对卢镇关群和佛子岭群成矿元素的地球化学特征研究,评价地层含矿性。成矿元素富集系数(K)分析表明卢镇关群和佛子岭群各组中Mo元素均富集,W、Pb、Ag、Cu元素也存在不同程度的富集,存在潜在成矿可能;成矿元素后期叠加强度(D)分析表明本区的Mo、Ag、Cu等元素存在不同程度的后期叠加作用;成矿元素变异系数(CV)分析表明本区成矿元素具有一定的成矿潜力。对卢镇关群和佛子岭群成矿能力评序得出最优势矿种为Mo元素,并且卢镇关群和佛子岭群是北淮阳钼矿的理想矿源层,为区内钼矿提供了成矿物质。成矿元素与主微量元素的相关性分析表明Cu、W、Ag、Pb、Zn等元素受碎屑岩特征和氧化还原环境控制。
The Luzhenguan Group and Foziling Group are widely distributed in the north Huaiyang metallogenic belt,but their ore characteristics have not been studied. In this paper, the geochemical characteristics of ore-forming elements of Luzhenguan Group and Foziling Group were studied to evaluate the ore-bearing properties. The enrichment coefficient(K) of the ore-forming elements indicates that the Mo is enriched in the Luzhenguan Group and Foziling Group, and W, Pb, Ag and Cu are also enriched in different degrees. So there are potential mineralization possibilities in Luzhenguan Group and Foziling Group. The intensity of superposition coefficients(D) shows that Mo, Ag and Cu in the study area also have different degrees of later superimposition. However, the coefficients of variation(CV) of the ore-forming elements indicate that the ore-forming elements have some potential for mineralization. The comprehensive evaluation for mineralization capability of Luzhenguan Group and Foziling Group indicates that the dominant ore-forming element in the study area is Mo element. Luzhenguan Group and Foziling Group constituted the ideal source beds of molybdenum ore and provided ore-forming materials. Correlation coefficients between ore-forming elements and major elements and the characteristic indexes show that Cu, W, Ag,Pb, Zn are controlled by clastic rock characteristics and redox environment.
The Luzhenguan Group and Foziling Group are widely distributed in the north Huaiyang metallogenic belt,but their ore characteristics have not been studied. In this paper, the geochemical characteristics of ore-forming elements of Luzhenguan Group and Foziling Group were studied to evaluate the ore-bearing properties. The enrichment coefficient(K) of the ore-forming elements indicates that the Mo is enriched in the Luzhenguan Group and Foziling Group, and W, Pb, Ag and Cu are also enriched in different degrees. So there are potential mineralization possibilities in Luzhenguan Group and Foziling Group. The intensity of superposition coefficients(D) shows that Mo, Ag and Cu in the study area also have different degrees of later superimposition. However, the coefficients of variation(CV) of the ore-forming elements indicate that the ore-forming elements have some potential for mineralization. The comprehensive evaluation for mineralization capability of Luzhenguan Group and Foziling Group indicates that the dominant ore-forming element in the study area is Mo element. Luzhenguan Group and Foziling Group constituted the ideal source beds of molybdenum ore and provided ore-forming materials. Correlation coefficients between ore-forming elements and major elements and the characteristic indexes show that Cu, W, Ag,Pb, Zn are controlled by clastic rock characteristics and redox environment.
引文
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