文献类型：期刊文献

中文题名：贵州二叠系茅口组顶部锰矿沉积特征及矿床成因研究

英文题名：The Sedimentary Characteristics and Origin of Manganese Deposit in the Middle Permian Maokou Formation in Guizhou,China

作者：杨瑞东 程玛莉 高军波 徐海 李军 陈军 刘坤

第一作者：杨瑞东

机构：[1]贵州大学资源与环境工程学院;[2]贵州理工学院

第一机构：贵州大学资源与环境工程学院,贵阳550025

年份：2018

卷号：92

期号：4

起止页码：804-816

中文期刊名：地质学报

外文期刊名：Acta Geologica Sinica

收录：CSTPCD;;EI(收录号：20184305980626);Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：贵州省科技厅科技创新团队项目(黔科合平台人才[2018]5613);科研项目(黔科合基础[2016]1404);贵州大学学科建设项目的成果

语种：中文

中文关键词：地球化学;沉积特征;锰矿成矿;茅口组;贵州

外文关键词：Geochemistry;Sedimentary characteristics; Manganese deposit origin; MaokouFormation; Guizhou Province

摘要：通过对遵义、纳雍营盘等地含锰岩系沉积特征及沉积地球化学特征研究,结果表明,锰矿体形态主要以层状、似层状、透镜状、脉状产出,具有角砾状构造、递变层理等,常夹硅质岩和凝灰岩,具有热水喷流沉积构造特征。锰矿层位于玄武岩之下,夹于茅口组灰岩顶部,说明锰矿成矿在玄武岩喷发之前。含锰岩系中的矿物组合有浸染状黄铜矿,黄铁矿,重晶石,天青石,菱锰矿、钙菱锰矿、锰方解石、黄铜矿、蓝铜矿、褐铁矿、绿泥石、石英及其他碳酸盐岩矿物等,这些矿物组合与热水沉积矿物组合类似。对含锰岩系进行微量元素、稀土元素、碳同位素分析测试表明,含锰岩系富集As、Co、Cu、Cr、Mo、Ni、Pb、U和V等元素,Fe/Ti、(Fe+Mn)/Ti及Al/(Al+Fe+Mn)比值,Fe-Mn-(Cu+Co+Ni)×10三角图解等均显示锰矿属于热水沉积成因。锰矿石碳同位素值δ^(13) C介于+4.17‰^-18.53‰,氧同位素δ^(18) O介于-6.98‰^-10.05‰显示,碳同位素组成具有热水沉积特征。含锰岩系稀土配分曲线与峨眉山玄武岩稀土配分曲线类似,表明锰矿成矿物质来源与峨眉地幔热柱密切相关。
The sedimentary sequence and geochemistry of manganese-bearing strata in Huangtukan（Zunyi）and Yingpan（Nayong） were studied. The results show that the manganese deposit in Yingpan and Huangtukan occurs as stratified,stratoid beds,lenticular,and vein,and is of brecciated structure and graded bedding structure,etc.,and intercalated with tuff and siliceous rocks.Therefore,the Permian manganese deposit in Guizhou Province is hydrothermal in origin.Mn-bearing layer is sandwiched between overlying basalt and underlying Maokou Formation limestone,demonstrating that the manganese deposit formed prior to eruption of basalt magma.Chalcopyrite,pyrite,barite,celestite,rhodochrosite,calcium rhodochrosite,calcimangite,azurite,limonite,chlorite,quartz and carbonate minerals are disseminated in the Permian manganese-bearing strata.The mineral association is similar to hydrothermal mineral association.The analyses of major elements,trace elements,rare earth elements,along with C isotopic of manganese-bearing strata,indicate that Mn-bearing deposit is enriched in As,Co,Cu,Cr,Mo,Ni,Pb,U,V,etc.Ratios of Fe/Ti,（Fe＋Mn）/T and Al/（Al＋Fe＋Mn）,and Fe-Mn-（Cu＋Co＋Ni）×10 and Zr-Cr diagrams show that the manganese deposit is hydrothermal deposition genesis.C and O isotopic compositions of the manganese deposit are 4.17‰ ～-18.53‰PDB,and-6.98‰ ～-10.05‰PDB,respectively,implying that the manganese deposit is hydrothermal deposition in origin also.REE pattern curves of manganese deposits in Huangtukan and Yingpan are all overlapped with that of E＇meishan Basalt,suggesting that the ore-forming material of the manganese deposit is closely related to the E＇meishan mantle plume.