简介:<正>1IntroductionTheundergroundbrineresourcesdistributingwidelyinSichuanBasin,Chinahavedrawnworldwideattentionduetotheirunusualelementabundanceandexcellentquality.
简介:InordertoinvestigatetheevolutionofShiquanhe-Yongzhu-Jialiophioliticmélangebelt,thegabbrosfromnewdiscoveredZhongcangophioliticmélangearestudiedthroughpetrology,whole-rockgeochemistry,zirconU-PbdatingandLu-Hfisotope.Thegabbrosinvestigatedinthispapercontaincumulategabbroandgabbrodike,andtheyhaveundergonegreenschist-amphibolitefaciesmetamorphism.Thechondritenormalizedrareearthelement(REE)patternsofmostoftheserocksshowflattypeswithslightlylightREE(LREE)depletionandtheN-MORBnormalizedincompatibleelementsdiagramsindicatedepletioninhighfieldstrengthelements(HFSE)(Nb,Ta)andenrichmentinlargeionlithophileelements(LILE).Thesegabbroshaveislandarcandmid-oceanridgebasaltaffinities,suggestingthattheywereoriginatedinanoceanicbackarcbasin.WholerockgeochemistryandhighpositiveεNd(t)valuesshowthatthesegabbroswerederivedfrom~30%partialmeltingofaspinellherzolitemantle,whichwasenrichedbyinteractionwithslab-derivedfluidsandmeltsfromsediment.U-Pbanalysesofzirconsfromcumulategabbroyieldaweightedmeanageof114.3±1.4Ma.Basedonourdataandpreviousstudies,weproposethatanintra-oceanicsubductionsystemandbackarcbasinoperatedintheNeo-TethyOceanofcentralTibetduringMiddleJurassicandEarlyCretaceous,resemblingmodernactiveintra-oceanicsubductionsystemsinthewesternPacific.
简介:RamanpeaksofvarioushydratesintheH2O-NaCl-CaCl2systemhavebeenpreviouslyidentified,butaquantitativerelationshipbetweentheRamanpeaksandXNaCl(i.e.,NaCl/(NaCl+CaCl2))hasnotbeenestablished,mainlyduetothedifficultytofreezethesolutions.Thisproblemwassolvedbyaddingaluminapowdertothesolutionstofacilitatenucleationofcrystals.Cryogenic(-185oC)Ramanspectroscopicstudiesofalumina-spicedsolutionsindicatethatXNaClislinearlycorrelatedwiththetotalpeakareafractionofhydrohalite.Capsulesofsolutionsmadefromsilicacapillarywerepreparedtosimulatefluidinclusions.Mostoftheseartificialfluidinclusionscouldnotbetotallyfrozenevenattemperaturesaslowas-185oC,andthetotalpeakareafractionofhydrohaliteisnotcorrelatedlinearlywithXNaCl.However,thedegreeofdeviation(?XNaCl)fromthelinearcorrelationestablishedearlierisrelatedtotheamountofresidualsolution,whichisreflectedbytheratio(r)ofthebaseline"bump"area,resultingfromtheinterstitialunfrozenbrinenear3435cm-1,andthetotalhydratepeakareabetween3350and3600cm-1.Alinearcorrelationbetween?XNaClandrisestablishedtoestimateXNaClfromcryogenicRamanspectroscopicanalysisforfluidinclusions.
简介:热泵系统以其经济、可靠、环保、用途广、维护简便、占地面积小、使用寿命长等优点得以广泛应用,然而随着热泵市场不断发展,热泵项目的优点并未得到充分展现,特别是其经济性在实际运行中并不理想,据调查,其原因包括盲目选择热泵系统、系统设计不合理、施工存在偷工减料、运行队伍不专业等,尤其是运行维护队伍素质较低并长期得不到相关单位的重视,未对运行人员进行专业的培训,使得运行人员对系统不了解,设备保养不到位,在设备的投入与调节上基本不做,对部分安装的自动控制系统基本不用,造成系统在大流量小温差的工况下运行,为系统的经济性带来负面影响,给热泵系统的发展带来严重阻碍,本文将站在一个良好的热泵系统上,从运行维护的角度阐述怎样发挥热泵系统的潜能,展现热泵系统的优越性。
简介:通过盆栽实验,研究了不同营养土改良的铜尾矿对旱柳(Salixmatsudana)扦插枝条生长及根系特性的影响。处理方式分别为TA100(100%尾矿)、TA80(80%尾矿+20%营养土)、TA60(60%尾矿+40%营养土)、TA40(40%尾矿+60%营养土)、TA20(20%尾矿-80%营养土)、TA00(100%营养土)。研究结果发现,旱柳枝条在5种处理方式下均可生根成活,但长势存在差异。随着尾矿含量的降低,旱柳枝条的生物量呈现出增加的趋势;随着尾矿含量的降低,旱柳枝条不定根数目增多、平均根长及最长的根长增加,根系活力先增强后降低。结果表明,旱柳可用于铜尾矿废弃地植被恢复,利用营养土改良有利于柳条不定根的形成和生长。