安徽庐枞地区铁-铜矿成矿规律与找矿
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摘要
构建庐枞地区燕山期Fe、Cu、Au成矿系列,根据成矿构造背景和含矿岩浆岩特点,将其划分为3个成矿亚系列:以矽卡岩型Cu、Mo、Au矿为主的亚系列,以矽卡岩型Fe及Fe、Cu矿为主的亚系列和以玢岩铁矿为主的火山--次火山岩型铁矿亚系列。该区具较大找矿远景的靶区有:①沙溪铜(金)找矿靶区;②清水塘—岳山铁、锌找矿靶区;③井边—巴家滩铜矿找矿靶区。其中,井边—巴家滩地区成矿地质条件良好,深部存在斑岩型铜矿的可能性较大,具有寻找大型斑岩型铜矿的找矿远景,应对该区进行深入研究和普查评价工作,以实现庐枞盆地内部铜矿找矿的突破。经预测,应对泥河、罗河和龙桥等大型超亿吨铁矿外围进行勘探,以达到建立20～25亿吨大型钢铁基地的目标。
The authors made clear on the Fe,Cu and Au metallogenic series of Yanshanian in Luzong area and divided it into three metallogenic sub-series based on structural background of mineralization and characteristics of ore-bearing magmatic rocks,including the sub-series mainly by skarn-type Cu,Mo and Au deposits,the sub-series mainly by skarn-type Fe and Fe,Cu deposits,and the sub-series of igneous and sub-igneous rock iron deposit mainly by porphyrite iron deposits.The prospecting target areas in Lujiang-Zongyang areas are:① Shaxi copper(gold) prospecting area;② Qingshuitang-Yueshan iron and zinc prospecting area;③ Jingbian-Bajiatan copper deposit prospecting area.The Jingbian-Bajiatan area has pretty good geological situation of mineralization with very large probablility of existing porphyry copper deposit in its deep part and prospecting perspective of porphyry copper deposit,which is necessary to do further research and evaluate for breakthrough of copper deposit prospecting in Luzong Basin.Based on the prediction,the periphery exploration of Nihe,Luohe and Longqiao large super-billion tons iron deposits should be carried out,so as to reach the main goal of building 2～2.5 billion tons steel and iron base.
The authors made clear on the Fe,Cu and Au metallogenic series of Yanshanian in Luzong area and divided it into three metallogenic sub-series based on structural background of mineralization and characteristics of ore-bearing magmatic rocks,including the sub-series mainly by skarn-type Cu,Mo and Au deposits,the sub-series mainly by skarn-type Fe and Fe,Cu deposits,and the sub-series of igneous and sub-igneous rock iron deposit mainly by porphyrite iron deposits.The prospecting target areas in Lujiang-Zongyang areas are:① Shaxi copper(gold) prospecting area;② Qingshuitang-Yueshan iron and zinc prospecting area;③ Jingbian-Bajiatan copper deposit prospecting area.The Jingbian-Bajiatan area has pretty good geological situation of mineralization with very large probablility of existing porphyry copper deposit in its deep part and prospecting perspective of porphyry copper deposit,which is necessary to do further research and evaluate for breakthrough of copper deposit prospecting in Luzong Basin.Based on the prediction,the periphery exploration of Nihe,Luohe and Longqiao large super-billion tons iron deposits should be carried out,so as to reach the main goal of building 2～2.5 billion tons steel and iron base.
引文
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[11]徐兆文,徐文艺,邱检生,等.与沙溪斑岩铜(金)矿床有关的石英闪长斑岩地质地球化学特征及形成时代研究[J].地质与勘探,2000,36(4):36-40.XU Zhao-wen,XU Wen-yi,QIU Jian-sheng,et al.An investigation of the age and geological--geochemical characteristics of quartz diorite porphyry in Shaxi por-phyry copper(gold)deposit[J].Geology and Explo-ration,2000,36(4):36-40.
[12]Gregg W.Morrison,stratigraphic control of Cu--Fe skarn ore distribution and genesis at Craigmont,British Columbia[J].Canadian Institute of Mining,Metallur-gy and Petroleum Bulletin,1980,73(820):109-123.
[13]倪若水,吴其初,汪祥云,等.安徽庐江龙桥铁矿层新资料及成矿作用多阶段演化模式[J].地质论评,1994,40(6):565-575.NI Ruo-shui,WU Qi-chu,WANG Xiang-yun,et al.New data and evolutionary model of polymineralization for the Longqiao iron deposit,Lujiang,Anhui[J].Ge-ological Review,1994,40(6):565-575.
[14]刘昌涛.安徽庐枞盆地硫铁矿床地质特征及控矿因素[J].化工地质,1994,16(3):163-171.LIU Chang-tao.Geological characters and ore-contra-olling factors of the pyrite deposits in Luzong Basin,An-hui[J].Geological of Chemical Minerals,1994,16(3):163-171.
[2]吴明安,侯明金,赵文广.安徽省庐枞地区成矿规律及找矿方向[J].资源调查与环境,2007,28(4):269-277.WU Ming-an,HOU Ming-jin,ZHAO Wen-guang.Re-sources survey&environment,mineralization regularity and exploration direction in Luzong area,Anhui[J].Resources Survey and Environment,2007,28(4):269-277.
[3]吴长年,任启江,阮惠础,等.安徽庐枞盆地何家小岭黄铁矿床特征和成因研究[J].大地构造与成矿学,1993,17(3):229-237.WU Chang-nian,REN Qi-jiang,RUAN Hui-chu,et al.Pyrite deposit of the Hejia-Xiaoling mine,Lujiang-Zongy-ang Basin,Anhui Province:characteristics and genesis[J].Geotectonica et Metallogeinia,1993,17(3):229-237.
[4]张艳,王璞珺,程日辉,等.合肥盆地上侏罗统毛坦厂组火山岩地球化学特征及其对盆地性质的指示作用[J].世界地质,2006,25(3):237-244.ZHANG Yan,WANG Pu-jun,CHENG Ri-hui,et al.Geochemistry of Late Jurassic volcanic rocks of Maotan-chang Formation and its indication to Hefei Basin[J].Global Geology,2006,25(3):237-244.
[5]杜建国,戴圣潜,莫宣学,等.安徽沿江地区燕山期火山岩成岩成矿地质背景[J].地学前缘,2003,10(4):551-560.DU Jian-guo,DAI Sheng-qian,MO Xuan-xue,et al.Petrogenic and metallogenic settings of area along Yangtze river in Yanshanian,Anhui Province[J].Earth Science Frontiers,2003,10(4):551-560.
[6]刘同庆,高尔根,齐文凯,等.安徽沿江地区地壳结构三维空间特征的探讨[J].地质与勘探,1999,35(6):48-51.LIU Tong-qing,GAO Er-gen,QI Wen-kai,et al.On the three-dimension characteristics of crustal structure of the Reparian sites along Yangtze river in Anhui Province[J].Geology and Prospecting,1999,35(6):48-51.
[7]杨晓勇.郯庐断裂带南段沙溪含铜斑岩体的40Ar/39Ar年代学研究及意义[J].矿物岩石,2006,26(2):52-56.YANG Xiao-yong.40Ar/39Ar dating and geological signif-icance on the Cu-bearing porphrite of Shaxi from southern Tanlu fault belt[J].Journal of Petrology and Mineralogy,2006,26(2):52-56.
[8]任启江,王德滋,刘孝善,等.安徽庐枞地区巴家滩和矾山--石马滩岩体的时代和岩浆物质来源[J].科学通报,1991(10):771-773.REN Qi-jiang,WANG De-zi,LIU Xiao-shan,et al.The age and magma material resource of the Bajiatan rock body and Fanshan--Shimatan rock body in the Luzong ar-ea of Anhui[J].Science Bulletin,1991(10):771-773.
[9]孙冶东,杨荣勇,任启江,等.安徽庐枞中生代火山岩系的特征及其形成的构造背景[J].岩石学报,1994,10(1):94-103.SUN Ye-dong,YANG Rong-yong,REN Qi-jiang,et al.Discussion on the characteristics and tectonic setting of the Mesozoic volcanic sequences in Lujiang--Zongyang ar-ea[J].Acta Petrologica Sinica,1994,10(1):94-103.
[10]孙冶东,刘孝善,禇立明.安徽庐枞地区正长岩类稳定同位素研究[J].岩石学报,1991,7(3):95-97.SUN Ye-dong,LIU Xiao-shan,CHU Li-ming.The sta-ble isotope study of synenitoid in Lujiang--Zongyang are-a,Anhui Province[J].Acta Petrologica Sinica,1991,7(3):95-97.
[11]徐兆文,徐文艺,邱检生,等.与沙溪斑岩铜(金)矿床有关的石英闪长斑岩地质地球化学特征及形成时代研究[J].地质与勘探,2000,36(4):36-40.XU Zhao-wen,XU Wen-yi,QIU Jian-sheng,et al.An investigation of the age and geological--geochemical characteristics of quartz diorite porphyry in Shaxi por-phyry copper(gold)deposit[J].Geology and Explo-ration,2000,36(4):36-40.
[12]Gregg W.Morrison,stratigraphic control of Cu--Fe skarn ore distribution and genesis at Craigmont,British Columbia[J].Canadian Institute of Mining,Metallur-gy and Petroleum Bulletin,1980,73(820):109-123.
[13]倪若水,吴其初,汪祥云,等.安徽庐江龙桥铁矿层新资料及成矿作用多阶段演化模式[J].地质论评,1994,40(6):565-575.NI Ruo-shui,WU Qi-chu,WANG Xiang-yun,et al.New data and evolutionary model of polymineralization for the Longqiao iron deposit,Lujiang,Anhui[J].Ge-ological Review,1994,40(6):565-575.
[14]刘昌涛.安徽庐枞盆地硫铁矿床地质特征及控矿因素[J].化工地质,1994,16(3):163-171.LIU Chang-tao.Geological characters and ore-contra-olling factors of the pyrite deposits in Luzong Basin,An-hui[J].Geological of Chemical Minerals,1994,16(3):163-171.
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