陕西省柞水县南沟金矿床地质特征及找矿前景分析
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摘要
冷水沟—南沟矿区位于南秦岭印支期褶皱带东段。区内发育有冷水沟斑岩型铜矿床和南沟构造热液脉型金矿床。本文通过对南沟金矿区的成矿地质特征进行总结,发现区内金矿体主要赋存在斑岩体外围的基底构造层及与岩体的外接触带中。矿床成因属岩浆热液蚀变型、韧性剪切带型金矿床,结合冷水沟斑岩型铜矿成矿特征构成斑岩型矿床的成矿系列。综合分析认为本区具有良好的找矿前景,在柞水—山阳矿集区有望形成大型铜金矿床的突破。
Lengshuigou-Nangou deposit is located in the eastern indosinian Hercynian folding belt of Southern Qinling orogenic belt. Lengshuigou porphyry copper deposit and Nangou tectonic hydrothermal vein type gold deposit are also found inside the metallogenic belt. Through the comprehensive analysis of the metallpgenic geological features in Nangou gold deposit,it is thought that the orebodies are controlled by basement tectonic layer of Porphyry peripheral and rock mass external contact zone. This deposit is a typical magmatic hydrothermal corrosion variant and ductile shear zone type gold deposit,which integrated Lengshuigou porphyry copper deposit constitutes the metallogenic series of porphyry type deposit. It is believed that this mining area has a favorable prospecting potential,and it is possible to find a large-sized gold deposit and achieving significant exploration break through in ZhashuiShanyang mineralization region.
Lengshuigou-Nangou deposit is located in the eastern indosinian Hercynian folding belt of Southern Qinling orogenic belt. Lengshuigou porphyry copper deposit and Nangou tectonic hydrothermal vein type gold deposit are also found inside the metallogenic belt. Through the comprehensive analysis of the metallpgenic geological features in Nangou gold deposit,it is thought that the orebodies are controlled by basement tectonic layer of Porphyry peripheral and rock mass external contact zone. This deposit is a typical magmatic hydrothermal corrosion variant and ductile shear zone type gold deposit,which integrated Lengshuigou porphyry copper deposit constitutes the metallogenic series of porphyry type deposit. It is believed that this mining area has a favorable prospecting potential,and it is possible to find a large-sized gold deposit and achieving significant exploration break through in ZhashuiShanyang mineralization region.
引文
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[2]张西杜,代军治,王瑞廷,等.陕西柞-山地区冷(水沟)-池(沟)-色(河铺)金钼铜矿带特征及其区域找矿意义[J].中国地质.2012,39(6):1727-1742.
[3]卢欣祥,李明立,王卫,等.秦岭造山带的印支运动及印支期成矿作用[J].矿床地质.2008,27(6):762-774.
[4]谢桂青,任涛,李剑斌,等.陕西柞山盆地池沟铜钼矿区含矿岩体的锆石U-Pb年龄和岩石成因[J].岩石学报.2012,28(1):15-26.
[5]张本仁.陕西柞水—山阳成矿带区域地球化学[M].武汉:中国地质大学出版社,1989.
[6]牛宝贵,和正军,任纪舜,等.秦岭地区陡岭-小茅岭隆起带西段几个岩体的SHRIMP锆石U-Pb测年及地质意义[J].地质论评,2006,52(6):826-835.
[7]王瑞廷,李剑斌,任涛,等.柞水一山阳多金属矿集区成矿条件及找矿潜力分析[J].中国地质,2008,35:1291-1298.
[8]孟德明,王瑞廷,王鹏,等.陕西柞水-山阳矿集区冷水沟铜钼矿床成矿特征及成矿机制探讨[J].矿床地质,2014,33(4):833-846.
[9]尹颖,李征,杨智慧,等.陕西柞水县庙沟金矿床地质特征及找矿前景分析[J].矿产与地质.2015,29(3):334-341.
[10]代军治,张西社,王鹏,等.南秦岭柞水县冷水沟铜钼金矿床成矿流体、H-O-S同位素特征及成矿作用[J].地质与勘探.2015,51(1):13-22.
[11]陈雷,王宗起,吴发福,等.秦岭山阳—柞水矿集区150~140 Ma斑岩-矽卡岩型Cu Mo Fe(Au)矿床成矿作用研究[J].岩石学报,2014,30(2):415-436.
[12]陈雷,闰臻,王宗起,等.陕西山阳柞水矿集区燕山期岩体矿物学特征:对岩浆性质及成矿作用的指示[J].地质学报,2014,88(1):109-133.
[13]郑永飞,陈江峰.稳定同位素地球化学[M].北京:科学出版社.2000,218-234.