安徽庐江泥河铁矿的发现及意义
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摘要
泥河铁矿是在玢岩铁矿模式、大型矿集区成矿理论的指导下,通过系统分析和研究庐枞地区成矿地质条件和成矿规律,选择1∶5万航磁异常与重力异常套合地区,在1∶1万地磁测量基础上,利用钻探对磁异常进行验证而发现的,这一发现是长江中下游地区近20年来找矿的重大突破之一。勘探成果表明,泥河铁矿是一个由大型磁铁矿、大型硫铁矿、中型硬石膏矿组成的复合型矿床。泥河铁矿主要的赋矿围岩为上侏罗统砖桥组下段的火山碎屑岩及闪长玢岩,赋矿的有利构造为闪长玢岩体的穹状隆起部位。其围岩蚀变强烈,矿床成因类型为广义玢岩型铁矿。根据成矿条件和重磁异常,庐枞地区仍然具有重要的找矿远景,泥河主矿体东南部、泥河与罗河之间、矾母山-义津桥地区是今后铁矿找矿的重点地区。
Under guidance of the model for porphyrite iron deposit and the metallogenic theory of the large-scale ore intensive areas,combined with systematic researches on the metallogenic characteristics and rule,the area delineated jointly by 1∶50000 aeromagnetic anomaly and gravity anomaly was the result of verification using drilling based on the 1∶10000 geomagnetic survey.This discovery is also one of the important breakthroughs in the Middle and Lower of Yangtze River two decades.Exploration results show that the Nihe iron deposit is a composite deposit consisting of one large-scale magnetite ore deposit,one large-scale magnetite-pyrite ore deposit and one medium-scale anhydrite ore deposit.The host rocks of the deposit,which are intensively altered,are volcanoclastic rocks and diorite porphyrite of the lower member of the Upper Jurassic Zhuanqiao Formation.Preferential ore-bearing structure is the doming section of the diorite porphyrite intrusion,with intensive alteration in country rocks.The Nihe iron deposit is genetically classified into the porphyrite iron deposit.According to the ore-forming conditions and aeromagnetic- gravity anomalies,the Luzong area is of the potential for exploration outlook.The southeastern region of the Nihe deposit,the region between the Nihe and Luohe deposit,and the Fanmushan-Yijinqiao region are the important regions for the iron exploration in the future.
Under guidance of the model for porphyrite iron deposit and the metallogenic theory of the large-scale ore intensive areas,combined with systematic researches on the metallogenic characteristics and rule,the area delineated jointly by 1∶50000 aeromagnetic anomaly and gravity anomaly was the result of verification using drilling based on the 1∶10000 geomagnetic survey.This discovery is also one of the important breakthroughs in the Middle and Lower of Yangtze River two decades.Exploration results show that the Nihe iron deposit is a composite deposit consisting of one large-scale magnetite ore deposit,one large-scale magnetite-pyrite ore deposit and one medium-scale anhydrite ore deposit.The host rocks of the deposit,which are intensively altered,are volcanoclastic rocks and diorite porphyrite of the lower member of the Upper Jurassic Zhuanqiao Formation.Preferential ore-bearing structure is the doming section of the diorite porphyrite intrusion,with intensive alteration in country rocks.The Nihe iron deposit is genetically classified into the porphyrite iron deposit.According to the ore-forming conditions and aeromagnetic- gravity anomalies,the Luzong area is of the potential for exploration outlook.The southeastern region of the Nihe deposit,the region between the Nihe and Luohe deposit,and the Fanmushan-Yijinqiao region are the important regions for the iron exploration in the future.
引文
常印佛,刘湘培,吴言昌.1991.长江中下游铜铁成矿带.北京:地质出版社,71~76.
陈江峰,喻钢,杨刚,杨胜洪.2005.安徽沿江江南晚中生代岩浆-成矿年代学格架.安徽地质,15(3):161~169.
储国正.1999.安徽沿江地区铜金多金属矿化系列及其相互关系.安徽地质,9(1):45~53.
董树文,项怀顺,高锐,吕庆田,李建设,占双庆,卢占武,马立成.2010.长江中下游庐江-枞阳火山岩矿集区深部结构与成矿作用.岩石学报,26(9):2529~2542.
段超,周涛发,范裕,袁峰,丁铭,尚世贵,张乐骏.2009.庐枞盆地龙桥铁矿床中菱铁矿的地质特征和成因意义.矿床地质,(5):643~652.
范裕,周涛发,袁峰,钱存超,陆三明,Cooke D R.2008.安徽庐江-枞阳地区A型花岗岩的LA-ICPMS定年及其地质意义.岩石学报,24(8):1715~1724.
高锐,卢占武,刘金凯,匡朝阳,酆少英,李朋武,张季生,王海燕.2010.庐-纵金属矿集区深地震反射剖面解释结果——揭露地壳精细结构,追踪成矿深部过程.岩石学报,26(9):2543~2552.
陆三明,李建设,赵丽丽,韦导忠.2010.庐枞矿集区龙桥式铁矿床含矿层位地球化学特征及找矿意义.岩石学报,26(9):2577~2586.
吕庆田,韩立国,严加永,廉玉广,史大年,颜廷杰.2010.庐枞矿集区火山气液型铁、硫矿床及控矿构造的反射地震成像.岩石学报,26(9):2598~2612.
钱兵,袁峰,周涛发,范裕,张乐骏,马良.2010.庐枞盆地岳山银铅锌矿床地质特征及硫同位素地球化学研究.矿床地质,29(增刊):495~496.
任启江,刘孝善,徐兆文,胡受奚,胡文?,1991.安徽庐枞中生代火山构造洼地及其成矿作用.北京:地质出版社,1~206.
唐永成,吴言昌,储国正,邢凤鸣,王永敏,曹奋扬,常印佛.1998.安徽沿江地区铜金多金属矿床地质.北京:地质出版社,60~85.
汤加富,李怀坤,娄清.2003.郯庐断裂南段研究进展与性质讨论.地质通报,22(6):426~436.
汤加富,陆三明,李建设,韦导忠.2010.安徽庐枞火山岩盆地与邻区基底构造变形、形成演化及其对矿床分布的控制.岩石学报,26(9):2587~2597.
王德滋,任启江,邱检生,陈克荣,徐兆文,曾家湖.1996.中国东部橄榄安粗岩省的火山岩特征及其成矿作用.地质学报,1996,70(1):23~34.
王强,赵振华,许继峰,白正华,王建新,刘成新.2004.鄂东南铜山口,殷祖埃达克质(adakitic)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.岩石学报,20(2):351~360.
吴明安,张千明,汪祥云,高昌生,尚世贵,王明华.1996.安徽庐江龙桥铁矿.北京:地质出版社.
谢智,李全忠,陈江峰,高天山.2007.庐枞早白垩世火山岩的地球化学特征及其源区意义.高校地质学报,13(2):235~249.
邢凤鸣.1996.安徽沿长江地区中生代岩浆岩的碱质来源.安徽地质,6(1):15~18.
袁峰,周涛发,范裕,陆三明,钱存超,张乐骏,段超,唐敏慧.2008.庐枞盆地中生代火山岩的起源、演化及形成背景.岩石学报,24(8):1691~1702.
曾键年,覃永军,郭坤一,陈国光,曾勇.2010.安徽庐枞盆地含矿岩浆岩锆石U-Pb年龄及其对成矿时限的约束.地质学报,84(4):466~478.
翟裕生,姚书振,林新多.1992.长江中下游地区铁铜矿床.北京:地质出版社,1~120.
张乐骏,周涛发,范裕,袁峰,马良,钱兵.2010.安徽庐枞盆地井边铜矿床的成矿时代及其找矿指示意义.岩石学报,26(9):2729~2738.
张荣华,张雪彤,胡书敏.2010.庐枞火山盆地深部岩石与成矿过程.岩石学报,26(9):2665~2680.
张旗,王焰,钱青,杨进辉,王元龙,赵太平,郭光军.2001.中国东部中生代埃达克岩的特征及其构造-成矿意义.岩石学报,17(2):236~244.
周涛发,宋明义,范裕,袁峰,刘?,吴明安.2007.安徽庐枞盆地中巴家滩岩体的年代学研究及其意义.岩石学报,23(10):583~591.
周涛发,范裕,袁峰.2008.长江中下游成矿带成岩成矿作用研究进展.岩石学报.24(8):1665~1678.
周涛发,范裕,袁峰,宋传中,张乐骏,钱存超,陆三明,Cooke D R.2010.庐枞盆地侵入岩的时空格架和对成矿制约.岩石学报,26(9):2694~2714.
Yuan Feng,Zhou Taofa,Liu Jun,Fan Yu,Cooke D R,Jowitt SM.2011.Petrogenesis of volcanic and intrusive rocks of theZhuanqiao stage,Luzong Basin,Yangtze metallogenic belt,east China:i mplications for ore deposition.InternationalGeology Review,53:526~541.
Zhang Lejun,Zhou Taofa,Fan Yu,Yuan Feng.2009.Characteristics of hydrothermal alterationinthe Shaxi PorphyryCu-Au deposit,Anhui Province,China:Paragenesis andgeochemical.Geochi mica Et Cosmochi mica Acta,2009,73(13):A1506
Zhou Taofa,Fan Yu,Yuan Feng,Lu Sanming,Shang Shigui,Cooke D R,Meffre S,Zhao Guochun.2008.Geochronology ofthe volcanic rocks in the Lu-Zong basin and its significance.Science in China Series D:Earth Sciences,51(10):1470~1482.
Discovery of the Nihe Iron Deposit in Lujiangand its Exploration Significance
magnetic and Gravity Anomaly;Prospecting Criteria;
陈江峰,喻钢,杨刚,杨胜洪.2005.安徽沿江江南晚中生代岩浆-成矿年代学格架.安徽地质,15(3):161~169.
储国正.1999.安徽沿江地区铜金多金属矿化系列及其相互关系.安徽地质,9(1):45~53.
董树文,项怀顺,高锐,吕庆田,李建设,占双庆,卢占武,马立成.2010.长江中下游庐江-枞阳火山岩矿集区深部结构与成矿作用.岩石学报,26(9):2529~2542.
段超,周涛发,范裕,袁峰,丁铭,尚世贵,张乐骏.2009.庐枞盆地龙桥铁矿床中菱铁矿的地质特征和成因意义.矿床地质,(5):643~652.
范裕,周涛发,袁峰,钱存超,陆三明,Cooke D R.2008.安徽庐江-枞阳地区A型花岗岩的LA-ICPMS定年及其地质意义.岩石学报,24(8):1715~1724.
高锐,卢占武,刘金凯,匡朝阳,酆少英,李朋武,张季生,王海燕.2010.庐-纵金属矿集区深地震反射剖面解释结果——揭露地壳精细结构,追踪成矿深部过程.岩石学报,26(9):2543~2552.
陆三明,李建设,赵丽丽,韦导忠.2010.庐枞矿集区龙桥式铁矿床含矿层位地球化学特征及找矿意义.岩石学报,26(9):2577~2586.
吕庆田,韩立国,严加永,廉玉广,史大年,颜廷杰.2010.庐枞矿集区火山气液型铁、硫矿床及控矿构造的反射地震成像.岩石学报,26(9):2598~2612.
钱兵,袁峰,周涛发,范裕,张乐骏,马良.2010.庐枞盆地岳山银铅锌矿床地质特征及硫同位素地球化学研究.矿床地质,29(增刊):495~496.
任启江,刘孝善,徐兆文,胡受奚,胡文?,1991.安徽庐枞中生代火山构造洼地及其成矿作用.北京:地质出版社,1~206.
唐永成,吴言昌,储国正,邢凤鸣,王永敏,曹奋扬,常印佛.1998.安徽沿江地区铜金多金属矿床地质.北京:地质出版社,60~85.
汤加富,李怀坤,娄清.2003.郯庐断裂南段研究进展与性质讨论.地质通报,22(6):426~436.
汤加富,陆三明,李建设,韦导忠.2010.安徽庐枞火山岩盆地与邻区基底构造变形、形成演化及其对矿床分布的控制.岩石学报,26(9):2587~2597.
王德滋,任启江,邱检生,陈克荣,徐兆文,曾家湖.1996.中国东部橄榄安粗岩省的火山岩特征及其成矿作用.地质学报,1996,70(1):23~34.
王强,赵振华,许继峰,白正华,王建新,刘成新.2004.鄂东南铜山口,殷祖埃达克质(adakitic)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.岩石学报,20(2):351~360.
吴明安,张千明,汪祥云,高昌生,尚世贵,王明华.1996.安徽庐江龙桥铁矿.北京:地质出版社.
谢智,李全忠,陈江峰,高天山.2007.庐枞早白垩世火山岩的地球化学特征及其源区意义.高校地质学报,13(2):235~249.
邢凤鸣.1996.安徽沿长江地区中生代岩浆岩的碱质来源.安徽地质,6(1):15~18.
袁峰,周涛发,范裕,陆三明,钱存超,张乐骏,段超,唐敏慧.2008.庐枞盆地中生代火山岩的起源、演化及形成背景.岩石学报,24(8):1691~1702.
曾键年,覃永军,郭坤一,陈国光,曾勇.2010.安徽庐枞盆地含矿岩浆岩锆石U-Pb年龄及其对成矿时限的约束.地质学报,84(4):466~478.
翟裕生,姚书振,林新多.1992.长江中下游地区铁铜矿床.北京:地质出版社,1~120.
张乐骏,周涛发,范裕,袁峰,马良,钱兵.2010.安徽庐枞盆地井边铜矿床的成矿时代及其找矿指示意义.岩石学报,26(9):2729~2738.
张荣华,张雪彤,胡书敏.2010.庐枞火山盆地深部岩石与成矿过程.岩石学报,26(9):2665~2680.
张旗,王焰,钱青,杨进辉,王元龙,赵太平,郭光军.2001.中国东部中生代埃达克岩的特征及其构造-成矿意义.岩石学报,17(2):236~244.
周涛发,宋明义,范裕,袁峰,刘?,吴明安.2007.安徽庐枞盆地中巴家滩岩体的年代学研究及其意义.岩石学报,23(10):583~591.
周涛发,范裕,袁峰.2008.长江中下游成矿带成岩成矿作用研究进展.岩石学报.24(8):1665~1678.
周涛发,范裕,袁峰,宋传中,张乐骏,钱存超,陆三明,Cooke D R.2010.庐枞盆地侵入岩的时空格架和对成矿制约.岩石学报,26(9):2694~2714.
Yuan Feng,Zhou Taofa,Liu Jun,Fan Yu,Cooke D R,Jowitt SM.2011.Petrogenesis of volcanic and intrusive rocks of theZhuanqiao stage,Luzong Basin,Yangtze metallogenic belt,east China:i mplications for ore deposition.InternationalGeology Review,53:526~541.
Zhang Lejun,Zhou Taofa,Fan Yu,Yuan Feng.2009.Characteristics of hydrothermal alterationinthe Shaxi PorphyryCu-Au deposit,Anhui Province,China:Paragenesis andgeochemical.Geochi mica Et Cosmochi mica Acta,2009,73(13):A1506
Zhou Taofa,Fan Yu,Yuan Feng,Lu Sanming,Shang Shigui,Cooke D R,Meffre S,Zhao Guochun.2008.Geochronology ofthe volcanic rocks in the Lu-Zong basin and its significance.Science in China Series D:Earth Sciences,51(10):1470~1482.
Discovery of the Nihe Iron Deposit in Lujiangand its Exploration Significance
magnetic and Gravity Anomaly;Prospecting Criteria;
目录