栾川县大清沟铁铜矿床地质特征及成矿模式探讨
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摘要
大清沟铁铜矿位于华北地台南缘,基底为太古界太华群变质岩系,盖层为中元古界熊耳群安山岩、官道口群碳酸盐岩,区内北西西向构造发育,岩浆活动比较频繁;矿体多呈脉状、似层状、透镜状分布,矿体严格受北西西向断裂或片理化带的控制。初步建立矿床的成矿模式:原生沉积的铁质形成了太华群片麻岩含铁建造基底,局部富集成矿形成原生沉积变质铁矿床;古远古晚期岩浆热液交代,在片理化带内富集形成含铁建造—热液改造型铁矿床;中生代花岗质岩浆沿断裂上侵进入火山岩盖层形成火山沉积含铁建造—热液改造型铁矿,在绢云石英片岩带附近形成闪长岩脉的同时形成热液脉状铜矿床。
Daqinggou Fe-Cu deposit is located in the southern margin of North China,the base Archean Taihua Group metamorphic rocks,cap rock is Mesoproterozoic Xiong'er Group andesite,Guandaokou group of carbonate rocks,the area NWW tectonic development,Magmatic activities are relatively frequent;the ore bodies are mostly vein-like,layer-like,and lenticular,and the ore bodies are strictly controlled by the NW-west fault or the physicochemical zone.The ore-forming model of the deposit was preliminarily established in this paper:the primary sedimentary iron formed the iron-bearing basement of the Taihua Group gneiss,and the localized rich ore formed the primary sedimentary metamorphic iron deposit.The ancient Paleozoic magmatic hydrothermal metasomatism,in the physicochemical zone Internal enrichment,formed an iron-bearing-hydrothermal-reformed iron deposit;Mesozoic granitic magma invaded into a volcanic rock caprock along the fault to form a volcanic deposit iron-bearinghydrothermal reformed iron ore,near the ziyun quartz schist zone.The formation of a diorite vein formed a hydrothermal vein copper deposit.
Daqinggou Fe-Cu deposit is located in the southern margin of North China,the base Archean Taihua Group metamorphic rocks,cap rock is Mesoproterozoic Xiong'er Group andesite,Guandaokou group of carbonate rocks,the area NWW tectonic development,Magmatic activities are relatively frequent;the ore bodies are mostly vein-like,layer-like,and lenticular,and the ore bodies are strictly controlled by the NW-west fault or the physicochemical zone.The ore-forming model of the deposit was preliminarily established in this paper:the primary sedimentary iron formed the iron-bearing basement of the Taihua Group gneiss,and the localized rich ore formed the primary sedimentary metamorphic iron deposit.The ancient Paleozoic magmatic hydrothermal metasomatism,in the physicochemical zone Internal enrichment,formed an iron-bearing-hydrothermal-reformed iron deposit;Mesozoic granitic magma invaded into a volcanic rock caprock along the fault to form a volcanic deposit iron-bearinghydrothermal reformed iron ore,near the ziyun quartz schist zone.The formation of a diorite vein formed a hydrothermal vein copper deposit.
引文
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[3]杨晓勇,王波华,杜贞保,等.论华北克拉通南缘霍邱群变质作用、形成时代及霍邱BIF铁矿成矿机制[J].岩石学报,2012,28(11):3476-3496.
[4]蓝廷广,范宏瑞,胡芳芳,等.鲁东昌邑古元古代BIF铁矿矿床地球化学特征及矿床成因讨论[J].岩石学报,2012,28(11):3595-3611.
[5]卢崇海,张耀华,奚锐,等.辽宁鞍本—抚顺地区新太古代含铁建造层位对比及形成时代讨论[J].化工矿产地质,2013,35(4):193-200.
[6]孟洁,李厚民,李立兴,等.华北克拉通南缘太华群铁山庙铁矿床沉积时代的约束——锆石U-Pb定年及Hf同位素证据[J].地质学报,2018,92(1):125-141.
[7]司马献章.豫西金矿田构造流体成矿系统[D].北京:中国地质大学(北京),2003.
[8]贺昕宇.熊耳山—外方山矿集区金—钼成矿系统[D].北京:中国地质大学(北京),2017.
[9]王克温.栾川县都督尖铁矿区共生铜矿的地质特征及找矿方向[C]//河南地球科学通报2012年卷.河南省地质学会,2012:4.
[10]吴鹏.小秦岭太华群铁矿资源地质特征及勘查开发建议[J].陕西地质,2012,30(2):105-112.
[11]李占轲.华北克拉通南缘中生代银—铅—锌矿床成矿作用研究[D].徐州:中国地质大学,2013.
[12]洛阳千山矿业科技有限公司.河南省洛阳百代矿业有限公司大清沟铁铜多金属矿生产勘探报告[R].洛阳,2016.
[13]沈其韩,宋会侠.华北克拉通条带状铁建造中富铁矿成因类型的研究进展、远景和存在的科学问题[J].岩石学报,2015,31(10):2795-2815.
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