贵州从江高增锰矿床地质特征及找矿潜力
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摘要
从江高增锰矿处于区域性雷公岭向斜北西翼次级岜扒向斜展布区,区内断裂构造主要为NE、NNE展布,该矿床是黔东南地区现今唯一具有中型规模的海相沉积碳酸锰矿床,其矿体呈层状、似层状产于南华系大塘坡组第一段黑色岩系中,矿石自然类型为碳酸锰矿石,按结构构造划分为块状矿石和条带状矿石,矿石工业类型划分低磷低铁富锰矿石和高磷低铁贫锰矿石。通过高增锰矿床与黔东铜仁松桃"大塘坡式"锰矿床相比,其赋矿层位、矿体特征、矿物组分、化学成分、矿石结构构造和矿石类型相同,而矿床规模相差甚远、成锰盆地沉积相分带特征不明显。通过成锰盆地特征、沉积环境和成矿条件分析,高增锰矿深部及外围地区仍具较大找矿潜力。
The Gaozeng manganese deposit located in Bapa syncline,which is a part of the Northwest limb of the regional Leigongshan syncline,and its dominant fault structures are NE and NNE-trending. The Gaozeng manganese deposit belongs to marine carbonate-type,and is the only one middle scale manganese deposit discovered in the Qiandongnan area. Ore bodies are stratiform or stratoid,hosted in the black shales of the first part of Datangpo Formation,Nanhua System. The natural type of ores is manganese carbonate,and the ores display massive and banded textures. Based on ore industry type,two kinds of ores are discovered: phosphorus and iron-depleted and manganese-enriched ores. Comparing 111 manganese deposit with "Datangpo "manganese deposit in Songtao area,Tongren City,Eastern Guizhou Province,the ore-hosting horizon,ore body characteristics,mineral composition,chemical composition,ore structure and ore type of Gaozeng manganese deposit are the same as those of "Datangpo Type"manganese deposit,but the deposit size is quite different from that of"Datangpo Type"manganese deposit,and Gaozeng manganese deposit is deposited in a manganese basin. The characteristics of facies zoning are not obvious. Based on the analysis of the characteristics of Manganese-Forming basin,depositional environment and metallogenic conditions,the Gaozeng manganese deposit still has great prospecting potential in deep and peripheral areas.
The Gaozeng manganese deposit located in Bapa syncline,which is a part of the Northwest limb of the regional Leigongshan syncline,and its dominant fault structures are NE and NNE-trending. The Gaozeng manganese deposit belongs to marine carbonate-type,and is the only one middle scale manganese deposit discovered in the Qiandongnan area. Ore bodies are stratiform or stratoid,hosted in the black shales of the first part of Datangpo Formation,Nanhua System. The natural type of ores is manganese carbonate,and the ores display massive and banded textures. Based on ore industry type,two kinds of ores are discovered: phosphorus and iron-depleted and manganese-enriched ores. Comparing 111 manganese deposit with "Datangpo "manganese deposit in Songtao area,Tongren City,Eastern Guizhou Province,the ore-hosting horizon,ore body characteristics,mineral composition,chemical composition,ore structure and ore type of Gaozeng manganese deposit are the same as those of "Datangpo Type"manganese deposit,but the deposit size is quite different from that of"Datangpo Type"manganese deposit,and Gaozeng manganese deposit is deposited in a manganese basin. The characteristics of facies zoning are not obvious. Based on the analysis of the characteristics of Manganese-Forming basin,depositional environment and metallogenic conditions,the Gaozeng manganese deposit still has great prospecting potential in deep and peripheral areas.
引文
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贵州省地矿局103地质大队,2015.贵州省黎平-从江地区锰、金矿整装勘查报告[R].
贵州省有色地质勘查局六总队,2007.贵州省从江县丙妹镇高增锰矿详查地质报告[R].
侯宗林,薛龙智.中国南方锰矿质[M].四川科技出版社,1996.
华仁,肖德长,黄锡家,李志伟,农良春.贵州黔东南地区锰矿成矿地球化学特征及找矿方向[J].矿产与地质,2018,Vol.32.No.3.
李无筠,严学英,殷科华,等.2013.贵州高增早震旦世菱锰矿矿床的形成机制[J].矿产勘查,Vol 4.No.5.
刘雨,周琦,袁良军,潘文,张遂,余文超,王萍,徐源,洪万华.2015.黔东松桃大塘坡地区南华系大塘坡组锰矿相带及分布规律[J].地质科技情报,Vo.34.No.6.
覃英,王佳武,蒋在锐,李代平.2013.黔东南地区南华纪锰矿地质地球化学特征[J].地质与勘探,Vol 49.No.6.
覃英,周琦,张遂.2005.黔东北地区南华纪锰矿基本特征[J].贵州地质,22(4):246-251.
王剑.2000.华南新元古代裂谷盆地沉积演化---兼论与Rodinia解体的关系[M].北京:地质出版社,1-146.
王砚耕.1996.贵州主要地质事件与区域地质特征[J].贵州地质,13(2):99-104.
王砚耕.2012.4.Rodinia超大陆演化与南华纪锰矿的成矿[R].
王砚耕,陈建书.2018.陈启飞.贵州构造-建造划分及其意义[R].
王砚耕,王来兴,朱顺才,等,1985.贵州东部大塘坡组地层沉积环境和成锰作用[M].贵阳:贵州人民出版社.
肖加飞,杨海英,许建斌,吴承泉.黔湘渝交界大塘坡式锰矿的成锰作用[J].矿物学报,2017.
徐志刚,陈毓川,王登红,陈郑辉.2008.中国成矿区带划分方案[M].地质出版社.
杨瑞东,高军波,程马莉,魏怀瑞,文雪峰,魏晓.2010.贵州从江高增新元代大塘坡组锰矿沉积地球化学特征[D].Vo84.No.12.
周琦,杜远生,袁良军,张遂,等.2017.古天然气渗漏沉积型锰矿床找矿模型---以黔湘渝毗邻区南华纪“大塘坡式”锰矿为例[J].地质学报,Vol 91.No10.
周琦,杜远生,著.2012.古天然气渗漏与锰矿成矿-以黔东地区南华纪“大塘坡式”锰矿为例[M].地质出版社.