矿物岩石地球化学通报
礦物巖石地毬化學通報
광물암석지구화학통보
BULLETIN OF MINERALOGY PETROLOGY AND GEOCHEMISTRY
2015年
4期
763-771
,共9页
煤夹矸%微量元素%稀土元素%地球化学特征%地质意义
煤夾矸%微量元素%稀土元素%地毬化學特徵%地質意義
매협안%미량원소%희토원소%지구화학특정%지질의의
partings%trace elements%rare earth element%geochemical characterization%geological implication
为探明太原西山矿区杜儿坪井田夹矸的地球化学特征及其地质成因,用 X 射线衍射分析(XRD)、电感耦合等离子体质谱(ICP-MS)、电感耦合等离子体发射光谱(ICP-OES)、氢化物-原子荧光光谱(HG-AFS)、发射光谱法(ES)等方法对杜儿坪井田2号、3号和8号煤层夹矸进行了矿物学和地球化学特征研究。结果发现2号、3号和8号煤层夹矸中矿物以高岭石、石英为主;与华北上地壳相比,杜儿坪夹矸中富集有害微量元素 Cd、Se、Mo、Pb、Be、Cu、Th 和 U,山西组夹矸中有害元素含量大于太原组(除 Mo、Pb 和 U);所有夹矸样品中 Li、Ga 的含量超过了工业品位,其工业利用价值值得关注;山西组夹矸稀土元素总含量高于太原组夹矸,所有夹矸稀土元素分配模式反映其与陆源碎屑关系密切;通过分析得到该区夹矸形成期间的陆源碎屑主要来自北部的花岗岩;太原组夹矸形成过程受海水影响;稀土元素与 Al 和 Si 等造岩矿物的聚类分析表明,夹矸中稀土元素主要赋存于高岭石等黏土矿物中。
為探明太原西山礦區杜兒坪井田夾矸的地毬化學特徵及其地質成因,用 X 射線衍射分析(XRD)、電感耦閤等離子體質譜(ICP-MS)、電感耦閤等離子體髮射光譜(ICP-OES)、氫化物-原子熒光光譜(HG-AFS)、髮射光譜法(ES)等方法對杜兒坪井田2號、3號和8號煤層夾矸進行瞭礦物學和地毬化學特徵研究。結果髮現2號、3號和8號煤層夾矸中礦物以高嶺石、石英為主;與華北上地殼相比,杜兒坪夾矸中富集有害微量元素 Cd、Se、Mo、Pb、Be、Cu、Th 和 U,山西組夾矸中有害元素含量大于太原組(除 Mo、Pb 和 U);所有夾矸樣品中 Li、Ga 的含量超過瞭工業品位,其工業利用價值值得關註;山西組夾矸稀土元素總含量高于太原組夾矸,所有夾矸稀土元素分配模式反映其與陸源碎屑關繫密切;通過分析得到該區夾矸形成期間的陸源碎屑主要來自北部的花崗巖;太原組夾矸形成過程受海水影響;稀土元素與 Al 和 Si 等造巖礦物的聚類分析錶明,夾矸中稀土元素主要賦存于高嶺石等黏土礦物中。
위탐명태원서산광구두인평정전협안적지구화학특정급기지질성인,용 X 사선연사분석(XRD)、전감우합등리자체질보(ICP-MS)、전감우합등리자체발사광보(ICP-OES)、경화물-원자형광광보(HG-AFS)、발사광보법(ES)등방법대두인평정전2호、3호화8호매층협안진행료광물학화지구화학특정연구。결과발현2호、3호화8호매층협안중광물이고령석、석영위주;여화북상지각상비,두인평협안중부집유해미량원소 Cd、Se、Mo、Pb、Be、Cu、Th 화 U,산서조협안중유해원소함량대우태원조(제 Mo、Pb 화 U);소유협안양품중 Li、Ga 적함량초과료공업품위,기공업이용개치치득관주;산서조협안희토원소총함량고우태원조협안,소유협안희토원소분배모식반영기여륙원쇄설관계밀절;통과분석득도해구협안형성기간적륙원쇄설주요래자북부적화강암;태원조협안형성과정수해수영향;희토원소여 Al 화 Si 등조암광물적취류분석표명,협안중희토원소주요부존우고령석등점토광물중。
In order to further ascertain the geochemical characteristics and geologic origin of the trace element,XRD,ICP-MS,ICP-OES,HG-AFS,and ES were used to study the geochemistry and mineralogy of gangue in 3main coal seams of the Duerping Coal Mine,Xishan coalfield,Taiyuan,Shanxi.The results revealed that kaolinite is the major mineral and quartz is the second major mineral of the partings of all samples.Compared with the north China earth's crust,coal gangues of the Duerping Coal Mine enrich hazardous elements,such as Cd,Se,Mo,Pb,Be,Cu,Th and U.The contents of the hazardous elements are more abundant in the partings of the Shanxi Formation,Permian Period than in the Taiyuan Formation,Car-boniferous Period (except Mo,Pb and U).In all samples,the contents of Li and Ga are very high,even higher than the in-dustrial grade of other associated deposits,therefore their industrial utilization deserves more attention.The values of REEs are higher in Shanxi Formation coal partings than in Taiyuan Formation coal partings.Distributions pattern of REEs in all partings shows close relations with terrigenous clastics.We concluded that the origin of the terrigenous clastics is the gran-ite in the north,and that the sedimentation process of the Taiyuan Formation was influenced by seawater.The clustering a-nalysis on contents of REEs and rock-forming elements showed that the REEs in the partings of the Duerping coal mine oc-cur mainly in kaolinite and other clay minerals.