江苏栖霞山铅锌矿矿床地质特征及控矿因素
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摘要
栖霞山铅锌矿床位于长江中下游坳陷带宁镇断褶束西部,是宁镇多金属成矿亚带的典型产物。区内构造—岩浆活动剧烈,成矿条件优越。通过对区域成矿背景、矿床地质特征的厘定,结合历年勘查资料的综合分析,总结了矿床构造控矿规律,并结合工程验证成果,讨论了找矿方向。研究表明:①矿区主要赋矿层位为中石炭统黄龙组下部的粗晶灰岩段(C_2h~1),并受控于纵向断裂F_2;②矿区构造发育,Si/Ca界面与断裂构造的叠加部位控制着矿体的产出位置、空间展布及形成规模;③主矿体侧伏深部、纵向断裂F_2两侧深部具有较大的找矿潜力。
Qixiashan Pb-Zn deposit is located in the west section of Ningzhen fold-bundle,the lower Yangtze region depression zone,which belongs to the Ningzhen polymetallic mineralization-subzone,the metallogenic conditions is good.Through the analysis of regional geological background and deposit geological characteristics,and combined with the comprehensive analysis of the exploration data over the years,the tectonic ore-controlling regularity of the deposit is summarized.Besides that,the prospecting direction is discussed based on the engineering verification results.The study results show that:①the mainly metallogenic strata of the mining area is the lower of Huanglong Formation of Middle Carboniferous,which controlled by the longitudinal fracture F_2;②structures in the mining area are well developed,and the occurring location,space form and form-scale are strictly controlled by superposition area of Si/Ca interface and fault structure;③the deep of lateral trending of main ore-body and both sides of longitudinal fracture F_2 have the favorable prospecting potential.
Qixiashan Pb-Zn deposit is located in the west section of Ningzhen fold-bundle,the lower Yangtze region depression zone,which belongs to the Ningzhen polymetallic mineralization-subzone,the metallogenic conditions is good.Through the analysis of regional geological background and deposit geological characteristics,and combined with the comprehensive analysis of the exploration data over the years,the tectonic ore-controlling regularity of the deposit is summarized.Besides that,the prospecting direction is discussed based on the engineering verification results.The study results show that:①the mainly metallogenic strata of the mining area is the lower of Huanglong Formation of Middle Carboniferous,which controlled by the longitudinal fracture F_2;②structures in the mining area are well developed,and the occurring location,space form and form-scale are strictly controlled by superposition area of Si/Ca interface and fault structure;③the deep of lateral trending of main ore-body and both sides of longitudinal fracture F_2 have the favorable prospecting potential.
引文
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[2] 闫峻,陈江峰,喻钢,等.长江中下游晚中生代中基性岩的连同位素特征:富集地幔的证据[J].高校地质学报,2003,9(2):195-206.
[3] 孟祥金,吕庆田,杨竹森,等.长江中下游铜陵及邻区中生代中酸性侵入岩地球化学特征及其深部岩浆作用探讨[J].地质学报,2011,85(5):757-777.
[4] 谢树成,殷鸿福,王红梅,等.南京栖霞山多金属矿床的有机成矿作用[J].矿床地质,1997(4):289-297.
[5] 谢树成,殷鸿福,王红梅,等.南京栖霞山多金属矿床流体包裹体重的生物标志化合物[J].科学通报,1997,42(12):1312-1315.
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[7] 张明超,李永胜,祝新友,等.南京栖霞山铅锌银多金属矿床“硅钙面”控矿特征[J].矿物学报,2013(S2):990-991.
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