安徽庐枞盆地铁矿含矿建造构造特征与成矿
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摘要
庐枞盆地是长江中下游成矿带重要的矿集区之一,盆地内发育众多铁矿床(点)。本文以玢岩型铁矿和沉积-热液叠改型铁矿为研究对象,在前人大量研究成果的基础上,通过野外地质调查和钻探等工作,对含矿建造构造特征进行了综合研究。结果表明:玢岩型铁矿的含矿建造包括粗安岩-凝灰岩建造、与膏辉岩化有关的变质建造和闪长玢岩建造;沉积-热液叠加改造型铁矿的含矿建造包括灰岩建造或钙质粉砂岩建造及粗安斑岩建造,与矽卡岩化有关的变质建造和正长岩建造关系密切;铁矿化与基底断裂、基底隆起带和岩侵型穹窿息息相关。初步认为庐枞火山岩盆地铁矿成矿作用可划分为沉积作用成矿期和岩浆热液成矿期。
The Lujiang-Zongyang volcanic basin in Anhui province is one of the important ore concentration regions in the Middle-Lower Yangtze metallogenic belt, where there are many iron deposits(points). The authors chose porphyrite iron deposit and sedimentary hydrothermal-transformation iron deposit in the basin to study. On the basis of the collection and secondary development on the number of previous studies data and achievements of exploration projects, throngh field geological investigation and drilling exploration, and identify characteristics of ore-bearing formation-tectonic. It is suggested that the ore bearing formation of porphyrite iron deposit includes trachyandesites-tuff formation, anhydrite-pyroxene alteration metamorphic formation and diorite porphyrite formation. And the ore bearing formation of sedimentary hydrothermal-transformation iron deposit includes limestone or calcareous siltstone formation, skarnized metamorphic formation and syenite formation.The iron mineralization was associated with basement fault, basement uplift and volcanic dome. On the combination of metallogenic regularity, and the mineralization of iron deposits in the Lujiang-Zongyang volcanic basin can be divided into sedimentation period and magma hydrothermal metallogeny period.
The Lujiang-Zongyang volcanic basin in Anhui province is one of the important ore concentration regions in the Middle-Lower Yangtze metallogenic belt, where there are many iron deposits(points). The authors chose porphyrite iron deposit and sedimentary hydrothermal-transformation iron deposit in the basin to study. On the basis of the collection and secondary development on the number of previous studies data and achievements of exploration projects, throngh field geological investigation and drilling exploration, and identify characteristics of ore-bearing formation-tectonic. It is suggested that the ore bearing formation of porphyrite iron deposit includes trachyandesites-tuff formation, anhydrite-pyroxene alteration metamorphic formation and diorite porphyrite formation. And the ore bearing formation of sedimentary hydrothermal-transformation iron deposit includes limestone or calcareous siltstone formation, skarnized metamorphic formation and syenite formation.The iron mineralization was associated with basement fault, basement uplift and volcanic dome. On the combination of metallogenic regularity, and the mineralization of iron deposits in the Lujiang-Zongyang volcanic basin can be divided into sedimentation period and magma hydrothermal metallogeny period.
引文
[1]常印佛,刘湘培,吴言昌.长江中下游铜铁成矿带[M].北京:地质出版社,1991,1-359.
[2]毛建仁,苏郁香,陈三元.长江中下游中酸性侵入岩与成矿[M].北京:地质出版社,1990,1-191.
[3]任启江,刘孝善,徐兆文.安徽庐枞中生代火山构造洼地及其成矿作用[M].北京:地质出版社,1991,1-145.
[4]覃永军.安徽庐枞盆地燕山期成矿地球动力学背景及成矿模式[D].中国地质大学(武汉)硕士学位论文,2010,1-149.
[5]张乐骏.安徽庐枞盆地成岩成矿作用研究[D].合肥工业大学博士学位论文,2011,1-239.
[6]汤家富,陆三明,李建设,等.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[J].岩石学报,2010,26(9):2587-2597.
[7]袁峰,周涛发,范裕,等.庐纵盆地中生代火山岩的起源、演化及形成背景[J].岩石学报,2008,24(10):1691-1702.
[8]周涛发,范裕,袁峰,等.长江中下游成矿带火山岩盆地的成岩成矿作用[J].地质学报,2011,85(5):712-730.
[9]周涛发,范裕,袁峰,等.庐枞盆地侵入岩的时空格架及其对成矿的制约[J].岩石学报,2010,26(9):2694-2714.
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[17]张舒,吴明安,汪晶,等.安徽庐枞盆地与正长岩有关的成矿作用[J].地质学报,2014,88(4):519-531.
[11]张舒,吴明安,赵文广,等.安徽庐江泥河铁矿矿床地球化学特征及其对成因的制约[J].岩石学报,2014,30(5):1382-1396.
[18]赵文广,吴明安,张宜勇,等.安徽省庐江县泥河铁硫矿床地质特征及成因初步分析[J].地质学报,2011,85(5):789-802.
[19]吴礼彬,陈芳,柳丙全,等.安徽省庐江县罗河式铁矿床地质特征与成矿模式[J].合肥工业大学学报(自然科学版),2011,34(6):899-904.
[20]胡文暄,徐充勤.论安徽庐极盆地大鲍庄式喷气沉积-叠加改造型硫铁矿床[J].地质科学,1992,3:213-224.
[12]段超.安徽庐枞盆地龙桥铁矿床地质地球化学特征和矿床成因研究[D].安徽:合肥工业大学硕士学位论文,2009,1-95.
[13]范裕,刘一男,周涛发,等.安徽庐枞盆地泥河铁矿床年代学研究及其意义[J].岩石学报,2014,30(5):1369-1381.
[14]周涛发,范裕,袁峰,等.安徽庐枞盆地泥河铁矿床与膏盐层的成因联系及矿床成矿模式[J].地质学报,2014,88(4):562-573.
[15]周涛发,王彪,范裕,等.庐枞盆地与A型花岗岩有关的磁铁矿-阳起石-磷灰石矿床-以马口铁矿床为例[J].岩石学报,2012,28(10):3087-3098.
[16]张赞赞,张舒,吴明安,等.庐枞盆地小包庄铁矿床地质特征及40Ar-39Ar同位素年代学研究[J].矿床地质,2017,36(4):795-815.
(1)魏国辉,金世恒,杜玉雕,等.安徽庐江矾山-枞阳周潭地区深部找矿靶区验证与评价报告,安徽省地质调查院,2017.
(2)赵文广,魏国辉,汤井田,等.安徽矾山镇-将军庙幅深部矿产资源远景调查报告,安徽省地质调查院,2015.
[2]毛建仁,苏郁香,陈三元.长江中下游中酸性侵入岩与成矿[M].北京:地质出版社,1990,1-191.
[3]任启江,刘孝善,徐兆文.安徽庐枞中生代火山构造洼地及其成矿作用[M].北京:地质出版社,1991,1-145.
[4]覃永军.安徽庐枞盆地燕山期成矿地球动力学背景及成矿模式[D].中国地质大学(武汉)硕士学位论文,2010,1-149.
[5]张乐骏.安徽庐枞盆地成岩成矿作用研究[D].合肥工业大学博士学位论文,2011,1-239.
[6]汤家富,陆三明,李建设,等.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[J].岩石学报,2010,26(9):2587-2597.
[7]袁峰,周涛发,范裕,等.庐纵盆地中生代火山岩的起源、演化及形成背景[J].岩石学报,2008,24(10):1691-1702.
[8]周涛发,范裕,袁峰,等.长江中下游成矿带火山岩盆地的成岩成矿作用[J].地质学报,2011,85(5):712-730.
[9]周涛发,范裕,袁峰,等.庐枞盆地侵入岩的时空格架及其对成矿的制约[J].岩石学报,2010,26(9):2694-2714.
[10]周涛发,范裕,袁峰.长江中下游成矿带成岩成矿作用研究进展[J].岩石学报,2008,24(8):1665-1678.
[17]张舒,吴明安,汪晶,等.安徽庐枞盆地与正长岩有关的成矿作用[J].地质学报,2014,88(4):519-531.
[11]张舒,吴明安,赵文广,等.安徽庐江泥河铁矿矿床地球化学特征及其对成因的制约[J].岩石学报,2014,30(5):1382-1396.
[18]赵文广,吴明安,张宜勇,等.安徽省庐江县泥河铁硫矿床地质特征及成因初步分析[J].地质学报,2011,85(5):789-802.
[19]吴礼彬,陈芳,柳丙全,等.安徽省庐江县罗河式铁矿床地质特征与成矿模式[J].合肥工业大学学报(自然科学版),2011,34(6):899-904.
[20]胡文暄,徐充勤.论安徽庐极盆地大鲍庄式喷气沉积-叠加改造型硫铁矿床[J].地质科学,1992,3:213-224.
[12]段超.安徽庐枞盆地龙桥铁矿床地质地球化学特征和矿床成因研究[D].安徽:合肥工业大学硕士学位论文,2009,1-95.
[13]范裕,刘一男,周涛发,等.安徽庐枞盆地泥河铁矿床年代学研究及其意义[J].岩石学报,2014,30(5):1369-1381.
[14]周涛发,范裕,袁峰,等.安徽庐枞盆地泥河铁矿床与膏盐层的成因联系及矿床成矿模式[J].地质学报,2014,88(4):562-573.
[15]周涛发,王彪,范裕,等.庐枞盆地与A型花岗岩有关的磁铁矿-阳起石-磷灰石矿床-以马口铁矿床为例[J].岩石学报,2012,28(10):3087-3098.
[16]张赞赞,张舒,吴明安,等.庐枞盆地小包庄铁矿床地质特征及40Ar-39Ar同位素年代学研究[J].矿床地质,2017,36(4):795-815.
(1)魏国辉,金世恒,杜玉雕,等.安徽庐江矾山-枞阳周潭地区深部找矿靶区验证与评价报告,安徽省地质调查院,2017.
(2)赵文广,魏国辉,汤井田,等.安徽矾山镇-将军庙幅深部矿产资源远景调查报告,安徽省地质调查院,2015.