陕西省八卦庙金矿床控矿构造与矿化富集规律
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摘要
为研究八卦庙金矿床的控矿构造及与矿化富集的关系,在总结矿体地质特征的基础上,采用地质统计分析对照的方法,对矿体富集的规律和控矿构造进行了剖析。结果表明,矿区内存在三种不同类型的金矿石,分别受不同的构造系统控制,而NE向节理密集带所构成的节理脉型金矿石是八卦庙金矿床主体,其与顺层揉皱石英脉叠加后,构成了较高品位的矿化富集中心;同时NE向节理脉及密集带的空间位置、规模和产状,亦控制了整个矿床矿化富集带的分布,即由高往下,矿体富集中心向NW方向偏移,并且有发散的趋势,深部及外围找矿的主要目标应以NE向节理裂隙构造为主。
In order to study the relationship between the ore-controlling structure and mineralization enrichment of Baguamiao gold deposit,based on the summary of the geological characteristics of the ore bodies,the ore enrichment regularity and ore controlling structure are analyzed with geo-statistical analysis and comparison method in this paper.The results show that there are three different types of gold ore in the mine,controlled by different structural system,respectively.The joint band type gold ore,controlled by NE joint concentrated zone is composed of the major part of Baguamiao gold deposit.And after superposition with crumpled bedding quartz,they constitute of a higher grade mineralization center.At the same time,the spatial position,scale and occurrence of NE joint vein and concentrated zone also control the distribution of the mineralization enrichment zone of the deposit.From the high to low places,ore body enrichment center shifts to NW direction with a trend of divergence.The main prospecting target in the deep and periphery should be focus on NE joint and fissures.
In order to study the relationship between the ore-controlling structure and mineralization enrichment of Baguamiao gold deposit,based on the summary of the geological characteristics of the ore bodies,the ore enrichment regularity and ore controlling structure are analyzed with geo-statistical analysis and comparison method in this paper.The results show that there are three different types of gold ore in the mine,controlled by different structural system,respectively.The joint band type gold ore,controlled by NE joint concentrated zone is composed of the major part of Baguamiao gold deposit.And after superposition with crumpled bedding quartz,they constitute of a higher grade mineralization center.At the same time,the spatial position,scale and occurrence of NE joint vein and concentrated zone also control the distribution of the mineralization enrichment zone of the deposit.From the high to low places,ore body enrichment center shifts to NW direction with a trend of divergence.The main prospecting target in the deep and periphery should be focus on NE joint and fissures.
引文
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[18]李建华.陕西凤太地区“八卦庙式”金矿控矿因素及其找矿潜力分析[J].矿产与地质,2008,22(1):62-64.
[19]刘协鲁,王义天,胡乔青,等.陕西省凤太矿集区柴蚂金矿床碳酸盐矿物的Sm-Nd同位素测年及意义[J].岩石学报,2014,30(1):271-280.
[2]张作衡.西秦岭地区造山型金矿床成矿作用和成矿过程[D].北京:中国地质科学院,2002.
[3]汪劲草,韦龙明.挤出构造对凤县八卦庙金矿床的控制[J].吉林大学学报(地球科学版),2012,42(增刊1):172-180.
[4]郑作平,于学元,郭键.八卦庙金矿地质及稳定同位素研究[J].陕西地质,1994,12(2):22-31.
[5]于学元,郑作平,牛贺才,等.八卦庙大型金矿床稀土元素地球化学研究[J].地球化学,1996,25(2):140-150.
[6]王瑞廷,韩俊民,毛景文,等.八卦庙超大型金矿床的铂族元素地球化学特征[C]//矿产地质:第八届全国矿床会议论文集,2006,25(增刊1):103-106.
[7]方维萱.陕西凤县八方山多金属矿床成矿成晕模式[J].有色金属矿产与勘查,1997,6(3):40-44.
[8]刘方杰,孙勇,裴先治.八卦庙金矿床脆-韧性剪切构造及其控矿特征[J].西北大学学报(自然科学版),1999,29(6):569-575.
[9]郑作平,陈繁荣,于学元.八卦庙金矿床的绿泥石特征及成岩成矿意义[J].矿物学报,1997,17(1):100-107.
[10]张长年,陈丹玲.八卦庙金矿成矿物理化学条件研究[J].西北大学学报(自然科学版),1993,23(2):141-150.
[11]朱利东,林丽,付修根,等.陕西凤县八卦庙金矿中的有机地球化学特征[J].矿床地质,2002,21(增刊1):800-803.
[12]郑作平,于学元.八卦庙超大型金矿床中铁白云石的特征兼论金矿成因[J].矿物岩石,1995,15(3):32-36.
[13]冯建忠,邵世才,汪东波,等.陕西八卦庙金矿脆-韧性剪切带控矿特征及成矿构造动力学机制[J].中国地质,2002,29(1):58-68.
[14]韦龙明.秦岭凤太地区八卦庙式金矿成矿地质条件及其成矿预测[D].成都:成都理工大学,2004.
[15]毛景文,张作衡,裴荣富.中国矿床模型概论[M].北京:地质出版社,2012.
[16]谢玉玲,徐九华,钱大益.陕西凤县八卦庙金矿床与地幔流体成矿作用[C]//全国包裹体及地质流体学术研讨会论文摘要,2002.
[17]李霞.陕西省凤太矿集区丝毛岭金矿床地质地球化学特征与成因研究[D].中国地质大学(北京),2010.
[18]李建华.陕西凤太地区“八卦庙式”金矿控矿因素及其找矿潜力分析[J].矿产与地质,2008,22(1):62-64.
[19]刘协鲁,王义天,胡乔青,等.陕西省凤太矿集区柴蚂金矿床碳酸盐矿物的Sm-Nd同位素测年及意义[J].岩石学报,2014,30(1):271-280.