鄂东南地区脉状铜矿地质特征及找矿潜力分析——以湖北大冶刘家垄矿区为例
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摘要
鄂东南矿集区殷祖岩体南部的刘家垄矿区,勘探线和钻孔显示刘家垄铜矿体主要倾向南、南西,受到毛铺-两剑桥东西断裂带的构造控制.矿体主要集中在石英闪长岩体与志留系碎屑岩接触交代部位,在岩体内侧赋存成矿.矿化类型主要有黄铜矿化石英闪长岩和含黄铜矿石英脉.围岩主要为钾化石英闪长岩和角岩化的粉砂岩.通过对比区域上的成矿类型,刘家垄脉状铜矿与斑岩型有关,即斜长石和石英为造岩矿物,可见绿泥石、方解石等蚀变矿物.矿化主要发生在夕卡岩化石英闪长岩带.通过总结成矿规律,认为有利的勘探区段在断裂构造发育、岩体与碎屑岩接触部位的岩体一侧.
The Liujialong orefield is located on the south of Yinzu pluton in the Southeastern Hubei ore-concentrated region. Exploratory sections and boreholes show that the copper orebodies,mainly S-and SW-trending,are structurally controlled by the Maopu-Liangjianqiao E-W fault zone. The orebodies are mainly concentrated in the contact metasomatism area between quartz diorite and Silurian clastic rocks,hosted inside the pluton. The mineralization is of mainly chalcopyrited quartz diorite and chalcopyrite-bearing quartz vein types,with wall rocks dominated by potassicaltered quartz diorite and hornstone altered siltstone. By comparing the metallogenic types regionally,Liujialong vein copper orebodies are related to porphyry type. That is,plagioclase and quartz serve as rock-forming minerals,with also altered minerals such as chlorite and calcite. The mineralization mainly occurs in the skarnized quartz diorite belt. By summarizing the metallogenic regularity,it is considered that the favorable exploration area is on the pluton side of the contact between pluton and clastic rocks,where fault structures are developed.
The Liujialong orefield is located on the south of Yinzu pluton in the Southeastern Hubei ore-concentrated region. Exploratory sections and boreholes show that the copper orebodies,mainly S-and SW-trending,are structurally controlled by the Maopu-Liangjianqiao E-W fault zone. The orebodies are mainly concentrated in the contact metasomatism area between quartz diorite and Silurian clastic rocks,hosted inside the pluton. The mineralization is of mainly chalcopyrited quartz diorite and chalcopyrite-bearing quartz vein types,with wall rocks dominated by potassicaltered quartz diorite and hornstone altered siltstone. By comparing the metallogenic types regionally,Liujialong vein copper orebodies are related to porphyry type. That is,plagioclase and quartz serve as rock-forming minerals,with also altered minerals such as chlorite and calcite. The mineralization mainly occurs in the skarnized quartz diorite belt. By summarizing the metallogenic regularity,it is considered that the favorable exploration area is on the pluton side of the contact between pluton and clastic rocks,where fault structures are developed.
引文
[1]舒全安.鄂东铁铜矿产地质[M].冶金工业出版社,1992:532.
[2]赵新福,李建威,马昌前.鄂东南铁铜矿集区铜山口铜(钼)矿床40Ar/39Ar年代学及对区域成矿作用的指示[J].地质学报,2006,80(6):849-862.
[3]周涛发,范裕,袁峰,等.长江中下游成矿带地质与矿产研究进展[J].岩石学报,2012,28(10):3051-3066.
[4]丁丽雪,黄圭成,夏金龙.鄂东南地区殷祖岩体的成因及其地质意义:年代学、地球化学和Sr-Nd-Hf同位素证据[J].地质学报,2017,91(2):362-383.
[5]杨峰华.湖北大冶铁山矿床钠化蚀变与成矿关系的探讨[J].地质与勘探,2001,37(6):20-24.
[6]谢桂青,朱乔乔,姚磊,等.鄂东南地区晚中生代铜铁金多金属矿的区域成矿模型探讨[J].矿物岩石地球化学通报,2013,32(4):418-426.
[7]刘永耀,孙振华,杨少铭.鄂东南过渡类型的寒武纪、奥陶纪地层[J].地层学杂志,1984,8(2):94-106.
[8]王伟,王敏芳,郭晓南,等.鄂东南矿集区铁山铁矿床中磁铁矿元素地球化学特征及其地质意义[J].地质与勘探,2015,51(3):451-465.
[9]马昌前,杨坤光,唐仲华,等.花岗岩类岩浆动力学:理论方法及鄂东花岗岩类例析[M].武汉:中国地质大学出版社,1994:38-48.
[10]涂光炽.中国超大型矿床[M].北京:科学出版社,2000:588.
[11]张国胜.鄂东南地区构造特征及其控岩控矿规律[J].湖北地矿,1998,12(2):16-23.
[12]王强,赵振华,许继峰,等.鄂东南铜山口、殷祖埃达克质侵入岩的地球化学特征对比:拆沉下地壳熔融与斑岩铜矿的成因[J].岩石学报,2004,20(2):351-360.
[13]吕新彪,姚书振,林新多.湖北大冶铜山口矽卡岩-斑岩复合型铜(钼)矿床地质特征和成矿机制[J].地球科学,1992,17(2):171-180.
[14]陈毓川,朱裕生.中国矿床成矿模式[M].北京:地质出版社,1993:367.
[15]陈腊春,王泽华,李朗田.湖北阳新丰山矿田矿床类型及其空间分布规律[J].资源环境与工程,2009,23(3):229-233.
[16]闭忠敏,杨松.鸡笼山矽卡岩金(铜)矿床地质矿产特征、物质来源及成矿机制研究[J].矿产与地质,2008,22(6):496-502.
[2]赵新福,李建威,马昌前.鄂东南铁铜矿集区铜山口铜(钼)矿床40Ar/39Ar年代学及对区域成矿作用的指示[J].地质学报,2006,80(6):849-862.
[3]周涛发,范裕,袁峰,等.长江中下游成矿带地质与矿产研究进展[J].岩石学报,2012,28(10):3051-3066.
[4]丁丽雪,黄圭成,夏金龙.鄂东南地区殷祖岩体的成因及其地质意义:年代学、地球化学和Sr-Nd-Hf同位素证据[J].地质学报,2017,91(2):362-383.
[5]杨峰华.湖北大冶铁山矿床钠化蚀变与成矿关系的探讨[J].地质与勘探,2001,37(6):20-24.
[6]谢桂青,朱乔乔,姚磊,等.鄂东南地区晚中生代铜铁金多金属矿的区域成矿模型探讨[J].矿物岩石地球化学通报,2013,32(4):418-426.
[7]刘永耀,孙振华,杨少铭.鄂东南过渡类型的寒武纪、奥陶纪地层[J].地层学杂志,1984,8(2):94-106.
[8]王伟,王敏芳,郭晓南,等.鄂东南矿集区铁山铁矿床中磁铁矿元素地球化学特征及其地质意义[J].地质与勘探,2015,51(3):451-465.
[9]马昌前,杨坤光,唐仲华,等.花岗岩类岩浆动力学:理论方法及鄂东花岗岩类例析[M].武汉:中国地质大学出版社,1994:38-48.
[10]涂光炽.中国超大型矿床[M].北京:科学出版社,2000:588.
[11]张国胜.鄂东南地区构造特征及其控岩控矿规律[J].湖北地矿,1998,12(2):16-23.
[12]王强,赵振华,许继峰,等.鄂东南铜山口、殷祖埃达克质侵入岩的地球化学特征对比:拆沉下地壳熔融与斑岩铜矿的成因[J].岩石学报,2004,20(2):351-360.
[13]吕新彪,姚书振,林新多.湖北大冶铜山口矽卡岩-斑岩复合型铜(钼)矿床地质特征和成矿机制[J].地球科学,1992,17(2):171-180.
[14]陈毓川,朱裕生.中国矿床成矿模式[M].北京:地质出版社,1993:367.
[15]陈腊春,王泽华,李朗田.湖北阳新丰山矿田矿床类型及其空间分布规律[J].资源环境与工程,2009,23(3):229-233.
[16]闭忠敏,杨松.鸡笼山矽卡岩金(铜)矿床地质矿产特征、物质来源及成矿机制研究[J].矿产与地质,2008,22(6):496-502.