(1. 昆明理工大学 国土资源工程学院，昆明 650093；
2. 中国地质科学院矿产资源研究所，北京 100037；
3. 中国科学院地质与地球物理研究所，北京 100029；
4. 湖南有色黄沙坪矿业分公司，郴州 424421)
摘 要: 黄沙坪铜多金属矿床位于湘南坪宝矿集区的南部，其深部的脉状、不规则状矽卡岩型铜多金属矿体明显受岩浆侵入接触构造的控制。随着矿山的持续开发，黄沙坪铜多金属矿床深部的保有资源日趋减少，亟待查明进一步找矿方向。为此，本文对黄沙坪铜多金属矿床深部的-256 m中段进行构造地球化学填图，通过聚类分析、因子分析讨论了地球化学元素的组合特征，绘制了构造地球化学因子异常图，判断了成矿流体运移方向，并进行找矿预测。研究表明：黄沙坪铜多金属矿床-256 m中段的矿体呈飘带状、不规则状分布，其产出位置及形态严格受岩浆侵入接触构造及断裂的控制。19#石门可划分为弱方解石化灰岩带(Ⅰ)、大理岩带(Ⅱ)、方解石化灰岩带(Ⅲ)、大理岩带(Ⅳ)、透辉石石榴石矽卡岩化带(Ⅴ)、花岗斑岩带(Ⅵ)、透辉石矽卡岩带(Ⅶ)、磁铁矿矿体带(Ⅷ)、透辉石矽卡岩带(Ⅸ)、花岗斑岩带(Ⅹ)、弱矽卡岩化花岗斑岩带(Ⅺ)、矽卡岩带(Ⅻ)。Pb、Zn、Ag、Au、W、Mo、Sn等成矿元素均在透辉石石榴石矽卡岩化带(Ⅴ)、花岗斑岩带(Ⅵ)中富集，微量元素在透辉石石榴石矽卡岩化带(Ⅴ)中含量较高，指示矽卡岩化为区内重要的找矿标志。黄沙坪铜多金属矿床-256 m中段构造岩样品的微量元素大致可分为高温成矿元素组合、中-低温成矿元素组合、岩体微量元素组合、围岩微量元素组合；其中高温成矿元素组合进一步细分为与Au有关的高温成矿元素组合、与Mo有关的高温成矿元素组合。构造地球化学异常的空间展布特征进一步佐证，黄沙坪铜多金属矿床存在Au-Cu-Pb-Zn、W-Sn-Mo-Bi两套成矿系统，-256 m中段中部以石英斑岩体为中心，成矿流体向南南东、北西、南东方向运移；而南部以花岗斑岩体为中心，成矿流体向北东、南西、北西三个方向运移。依据构造地球化学异常，本文圈定了2处重点找矿靶区。
关键字: 找矿预测；构造地球化学；-256m中段；黄沙坪铜多金属矿床；湘南
（1. Faculty of Land and Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Chinese Academy of Geological Sciences, Beijing 100037, China;
3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
4. Hunan Nonferrous Huangshaping Mining Branch, Chenzhou 424421,China）
Abstract:The Huangshaping copper polymetallic deposit is located in the southern part of the Pingbao ore concentration area in Southern Hunan, China. Its deep veined and irregular skarn-type copper polymetallic ore bodies are obviously controlled by magmatic intrusive contact structures. Due to continuous development, the remaining resources in the deep part of Huangshaping copper polymetallic deposit are decreasing, and it is urgent to identify further prospecting directions. In this paper, the tectono-geochemistry mapping was carried out in the -256 m level tunnel of Huangshaping copper polymetallic deposit. The combination characteristics of geochemical elements were discussed by cluster analysis and factor analysis. The anomaly map of tectono-geochemistry factors was drawn. The migration direction of ore-forming fluid was judged and the prospecting prediction was made. The results show that the ore bodies in the -256 m level tunnel of the Huangshaping copper polymetallic deposit are distributed in a banded and irregular shape, and their occurrence location and shape are strictly controlled by magmatic intrusion contact structures and faults. The 19# exploration line of -256 m level tunnel can be divided into weak calcite limestone belt (Ⅰ), marble belt (Ⅱ), calcite limestone belt (Ⅲ), marble belt (Ⅳ), diopside garnet skarn belt (Ⅴ), granite porphyry belt (Ⅵ), diopside skarn belt (Ⅶ), magnetite ore body belt (Ⅷ), diopside skarn belt (Ⅸ), granite porphyry belt (Ⅹ), weak skarn granite porphyry belt (Ⅺ), and skarn belt (Ⅻ). Pb, Zn, Ag, Au, W, Mo, Sn and other ore-forming elements are enriched in diopside garnet skarn belt (Ⅴ) and granite porphyry belt (Ⅵ). The contents of trace elements in diopside garnet skarn zone (Ⅴ) are high, indicating important prospecting indicators in the area. The trace elements of tectonite samples in the -256 m level tunnel of Huangshaping copper polymetallic deposit can be roughly divided into high temperature metallogenic element combination, medium-low temperature metallogenic element combination, rock trace element combination and surrounding rock trace element combination. Among them, the high-temperature metallogenic element combination is further subdivided into the high-temperature metallogenic element combination related to Au and the high-temperature metallogenic element combination related to Mo. The spatial distribution characteristics of tectonogeochemical anomalies further support the existence of Au-Cu-Pb-Zn and W-Sn-Mo-Bi metallogenic systems in the Huangshaping copper polymetallic deposit. The -256 m level tunnel is centered on quartz porphyry, and the ore-forming fluid migrates to NW and SE. In the south, the granite porphyry as the center, the ore-forming fluid migrates to three directions of NE, SW, NW. Based on the tectonic geochemical anomalies, two key prospecting targets were delineated in this paper.
Key words: mineralization forecast; tectono-geochemistry; -256 m level tunnel; Huangshaping copper polymetallic deposit; Southern Hunan
