山东沂南金矿铜井矿区矿液活动中心控矿特征
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摘要
沂南金矿铜井矿区的岩浆岩主要为侵入岩,严格受断裂构造控制。铜井闪长岩-闪长玢岩岩体为多期次侵位的复合岩体。分析了矿区及矿床地质特征,讨论了岩浆和矿液活动中心对矽卡岩型斑岩型金铜矿床的控矿作用,并对矿区可能存在的矿液活动中心位置进行了总结。研究表明:(1)矿区1个成矿岩体边缘或内部有数个矿液活动中心,矿体群受矿液活动中心控制,矿体多赋存于活动中心附近,远离活动中心矿体尖灭,矿体群消失;(2)矿区可能的矿液活动中心位置为岩体与围岩呈断层接触且有构造破碎带分布的位置,岩体边部拐角处有不同方向断层交汇地段,岩体中有"根"围岩捕掳体存在的地段,岩体边部构造形态特别复杂地段,较大岩枝边部继承性断裂复活地段等。
The magmatic rock in Tongjing Mining Area of Yinan Gold Mine is mainly for intrusive rock,it is strickly controlled by fault strctures. Diorite-diorite porphyrite is the composite rock mass with multistage subeemplacement in Tongjing Mining Area. The geological characteristics of the mining area and deposit are discussed,the ore-controlling effects of the magma and ore fluid activity center to skarn type Au-Cu deposit is analyzed,besides that,the locations of ore-fluid activity center in the mining area are summarized. The study results show that:(1)several ore-fluid activity centers are distributed in the edge or interior of the metallogenic rock mass,the ore-body groups are controllled by ore-fluid activity centers,ore-bodies are mainly distributed around ore-fluid activity centers,if the ore-bodies away from ore-fluid activity centers,it will be disappeared and the ore-body groups are also be disappeared;(2)ore-fluid activity centers may be distributed at the area that the rock mass is in fault contact with its surrounding rock and structural fracture zone is distributed,the intersection of disdirectional faults in the corner of rock mass side,the area that the surrounding rock xenolith with " root" is existed in the rock mass,the area that the structural is praticularly complex in rock mass side and the inherited fracture resurrected area of the side of larger apophysis.
The magmatic rock in Tongjing Mining Area of Yinan Gold Mine is mainly for intrusive rock,it is strickly controlled by fault strctures. Diorite-diorite porphyrite is the composite rock mass with multistage subeemplacement in Tongjing Mining Area. The geological characteristics of the mining area and deposit are discussed,the ore-controlling effects of the magma and ore fluid activity center to skarn type Au-Cu deposit is analyzed,besides that,the locations of ore-fluid activity center in the mining area are summarized. The study results show that:(1)several ore-fluid activity centers are distributed in the edge or interior of the metallogenic rock mass,the ore-body groups are controllled by ore-fluid activity centers,ore-bodies are mainly distributed around ore-fluid activity centers,if the ore-bodies away from ore-fluid activity centers,it will be disappeared and the ore-body groups are also be disappeared;(2)ore-fluid activity centers may be distributed at the area that the rock mass is in fault contact with its surrounding rock and structural fracture zone is distributed,the intersection of disdirectional faults in the corner of rock mass side,the area that the surrounding rock xenolith with " root" is existed in the rock mass,the area that the structural is praticularly complex in rock mass side and the inherited fracture resurrected area of the side of larger apophysis.
引文
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[2]刘丽,顾雪祥,李葆华,等.山东沂南金矿床流体包裹体特征及地质意义[J].地球与环境,2009,37(1):28-36.
[3]国兴伟,张洪波,高鹏为,等.沂南金矿矽卡岩型多金属矿床成矿规律及深部找矿预测[J].黄金科学技术,2010,18(5):31-33.
[4]钱建平,常德才,徐磊,等.山东沂南金矿田成矿构造系统和构造控矿规律[J].大地构造与成矿学,2017,41(1):77-90.
[5]钱建平,张海莹,杜继旭,等.构造地球化学找矿方法在山东沂南金矿的应用及效果[J].矿物岩石地球化学通报,2017,36(4):593-601.
[6]杨现利.利用岩浆和矿液活动中心寻找矽卡岩型矿床矿体群[J].有色金属:矿山部分,2001(6):25-27.
[7]高玉杰.金场矿区矿化特征和深部找矿潜力分析[J].有色金属:矿山部分,2010(4):25-28.
[8]张照川,许彦会,孙永国.沂南金矿地下热水情况分析与综合利用——积极应对变废为宝,回采高品位矿石[J].科技信息,2013(15):412.