简介:为查明华南埃迪卡拉纪磷矿床的沉积环境,本文选取瓮安磷矿区和开阳磷矿区作为研究对象,进行了详细的矿物学、稀土元素和铁同位素的研究。研究结果表明,瓮安下磷矿层和开阳磷矿床的磷块岩中含铁矿物为黄铁矿,显示重稀土亏损、无铈异常的特征,δ^56Fe显示出一定的变化范围(分别介于-0.33‰~0.27‰和0.1‰~0.54‰之间)。瓮安上磷矿层和厦安磷矿床、英坪磷矿床的磷块岩中含铁矿物为铁氧化物,δ^56Fe在~0‰附近,具明显的负铈异常特征。稀土元素配分方面,瓮安上磷矿层呈现出"帽子"型的配分特征,厦安磷矿床类似于现代海水的稀土配分模式,英坪磷矿床类似于热液的稀土配分模式。瓮安下磷矿层和开阳磷矿床在还原的沉积环境中形成;厦安上磷矿层、厦安磷矿床及英坪磷矿床形成于氧化的沉积环境。
简介:摘要: 滇东北镇雄县羊场磷矿为近年来新发现的超大型优质磷矿床,矿床储量大(预测远景资源量达130×108 t)、矿体厚度大(30余米),且矿石质量优(为低镁高钙石灰岩型磷矿石)。通过对羊场磷矿成矿地质背景、古构造、岩相古地理等综合分析,结合采矿技术与施工安全在采矿工程中的重要地位,且是决定安全事故发生概率、采矿人员人身安全以及采矿企业发展进程的关键。本文建议,采矿企业要认识到采矿技术与施工安全对自身发展的重要性,既要分析采矿技术特点,结合采矿工程具体情况选择适宜的采矿技术,又要认识到施工安全管理存在的问题,探究适宜的方式进行解决,确保施工安全质量及采矿效率的提升。
简介:AdhesionimprovementofCVDdiamondfilimbyintroducinganelectro-depositedinterlayer;Agitation:themostversatiledegreeoffreedomforsurfacefinishers;Developmentofhydroxyapatitecoatingonporoustitaniumviaelectro-depositiontechnique;EffectofintensemagneticfieldonCdTeelectro-deposition;ElectrodepositionofMetallicLithiumonaTungstenElectrodein1-Butyl-l-methylpyrrolidiniumBis(tritluoromethanesulfone)imideRoom-temperatureMoltenSalt
简介:[篇名]Bi-2212:AnHTSCoatedConductor,[篇名]Carbonnanotube-perovskite-compositesasnewelectrodematerial,[篇名]CeO{sub}2bufferlayerbypulsedlaserdepositionforYBCOcoatedconductor,[篇名]CeO{sub)2BufferLayersDepositedbyPulsedLaserDepositionforTFA-MODYBa{sub}2Cu{sub}3O{sub)(7-x)SuperconductingTape,[篇名]Characteristicofthin-filmNTCthermalSensors,[篇名]Characteristicsofcobalt-dopedzincoxidethinfilmspreparedbypulsedlaserdeposition,[篇名]CharacteristicsofTiO{sub}2ThinFilmasaPhotocatalystPrepardUsing-thePulsedLaserDepositionMethod.
简介:Co-dopingDepositionofp-typeZnOThinFilmsusingKrFExcimerLaserAblation;ComparisonofGrowthMorphologyinGe(001)HomoepitaxyUsingPulsedLaserDepositionandMBE;CompositionandstructureofBCNfilmspreparedbyionbeam-assistedpulsedlaserdeposition;Compositionofβ-FeSi{sub}2thin-filmsgrownbyapulsedlaserdepositionmethod
简介:[篇名]Electro-depositionoftantalumontumgstenandnickelinLiF-NaF-CaF{sub}2meltcontainingK{sub}2TaF{sub}7electrochemicalstudy,[篇名]Electro-EpitaxialBufferLaycrsforREBCOTspeArchitectures,[篇名]EQCMwithair-gapexcitationelectrode.Calibrationtestswithcopperandoxygencoatings,[篇名]FormationofWell-definedNanocolumnsbyIonTrackingLithography,[篇名]Fundamentalexperimentalstudyonfreefabricationofnanocrystallinecopperbulkbyselectiveelectrodepositionwithelectrolytejet,[篇名]Magneticnanowirearraysobtainedbyelectro-depositioninorderedaluminatemplates,[篇名]Morphologicalcharacteristicsofnickelparticleselectrodepositedfromchloridedominantsolution.