中国地质调查2016，Vol.3Issue(6)：17-25,9.
贵州务川大竹园铝土矿床伴生镓富集规律及沉积环境特征
Enrichment rules and sedimentary environment characteristics of associated gallium in bauxite deposit in Dazhuyuan of Wuchuan in Guizhou Province
摘要
Abstract
Through the study of Dazhuyuan bauxite deposit,we found that the content of associated gallium in bauxite deposit generally exceeds the minimum index of industrial utilization.Gallium has a different distribution in ore-bearing rock series and was moderately positively correlated with TiO2 ,Cr,Zr,Sn,meaning that gallium may occur in minerals containing Cr,Zr,Sn.Gallium and Al2 O3 has weakly positive correlation,indicating that gallium is possible to isomorphism exists in the form of aluminum.Also the Sr/Ba is 1 .09-1 9 .69 ,more than 1 , showing that bauxite ore formed in marine environment.The Th/U is 1 .72-1 2.31 ,showing the incomplete baux-ite weathering.And Ga/Al is 0.45 -1 .84,showing that the pH of mineralization medium varies lightly,and min-eral assemblages in acidic medium can be inferred by containing pyrite,kaolinite and other minerals in the ore-bearing rocks.The evidences that chondrite-normalized curve of rare earth element (REE)tilted to the right, light rare earth element (LREE)shows enrichment,heavy rare earth element (HREE)shows loss,δCe shows weak positive anomalies and Ce/Ce*is 1 .1 7-1 0.1 7,indicate that the ore-bearing rock series were formed in an oxygen-rich sedimentary environment.BesidesδEu appear as negative anomalies,which further indicates that mineralization is in oxide -based environment.Dazhuyuan bauxite deposit is concluded to be formed in marine oxygen-rich sedimentary environment through comprehensive analysis.关键词
伴生镓/铝土矿床/富集规律/沉积环境/稀土元素(REE)/务川大竹园/贵州Key words
associated gallium/bauxite deposit/enrichment rules/sedimentary environment/rare earth elements (REE)/Dazhuyuan in Wuchuan/Guizhou分类
天文与地球科学引用本文复制引用
吴波,韩忠华,翁申富,陈强,陶平..贵州务川大竹园铝土矿床伴生镓富集规律及沉积环境特征[J].中国地质调查,2016,3(6):17-25,9.基金项目
中国地质调查局“全国重要矿种成矿区划部署研究（编号12120114051501）”项目资助。 （）
