| 甘肃北山辉铜山铜矿地球化学异常结构研究 |
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| 引用本文：马生明,朱立新,刘海良,王会强,徐明钻.2011.甘肃北山辉铜山铜矿地球化学异常结构研究[J].地球学报,32(4):405-412. |
| DOI：10.3975/cagsb.2011.04.03 |
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| 基金项目:中国地质调查局地质调查项目(编号: 1212010813057) |
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| 中文摘要:以甘肃北山辉铜山铜矿为例, 探讨了矽卡岩型铜矿中元素的富集贫化特征以及由富集、贫化元素形成的正、负异常构成的地球化学异常结构。结果表明, 在矿床中发生富集的元素, 例如成矿元素Cu、矿化伴生元素As、Ag、Mo等、常量组分MgO等在试验区内形成了明显的环带结构, 中间为这些元素的正异常, 向外经背景带过渡为负异常。这些元素的正异常带与稀土元素Pr、Yb等的负异常吻合很好, 构成了有规律的地球化学异常结构, 共同指示出有利的成矿地质环境或矿化影响范围。在矿体产出部位, 矿化伴生元素Zn等的正异常及常量组分Al2O3、Na2O、微量元素Sr等的负异常明显, 与地球化学异常结构构成有机的整体, 有效反映出辉铜山铜矿总体成矿系统。本项研究是北山地区矽卡岩型铜矿靶区优选地球化学勘查方法的新尝试, 对该区地质找矿具有重要的实用价值。 |
| 中文关键词:辉铜山铜矿 微量富集贫化 正负异常 地球化学异常结构 靶区优选 |
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| A Study of Geochemical Anomaly Structure of the Huitongshan Copper Deposit in Beishan Area, Gansu Province |
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| Abstract:This paper has tentatively discussed characteristics of element enrichment and depletion and geochemical anomaly structure comprising positive anomalies of enriched elements and negative anomalies of depleted elements in skarn copper deposits of Beishan area, exemplified by the Huitongshan copper deposit. The results demonstrate that obvious zonal structures are formed by enriched elements, which include metallogenic element (Cu), mineralizing accompanying elements (As, Ag, Mo) and major element (MgO) in the study area. In the middle of the zonal structure there exist positive anomalies, which grade outward into negative anomalies through the background belt. Positive anomalies coincide well with negative anomalies formed by Pr and Yb, constituting regular geochemical anomaly structure and indicate favorable metallogenic geological environment or mineralization extension. At the position of the ore body, Zn positive anomalies and negative anomalies formed by Al2O3, Na2O and Sr exist obviously, making up an entirety with the geochemical anomaly structure and effectively reflecting the whole metallogenic system of the Huitongshan copper deposit. This study is a new attempt for the prospecting target optimization of geochemical exploration methods in Beishan area, and the result obtained may have practical value for geological prospecting of this area. |
| keywords:Huitongshan copper deposit enrichment and depletion of trace elements positive and negative anomalies geochemical anomaly structure prospecting target optimization |
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