简介:Mongoliaasatransitioneconomycountrydependslargelyondevelopingitswealthinmineralresources(gold,copper)byattractingforeigninvestment.TheMongoliangovernmentsupportedthisbyintroducingaveryliberalmininglaw.Furthermore,thehugeterritoryofMongoliaanditsmineralpotential,andtheexcellentknowledgeandexpertiseofMongoliangeologistsprovideaper-
简介:AworkshopoftheIGCP-473washeldinXinjiang,northwesternChina,fromAugust9-21.Itwasattendedbymorethan70scientists,including29fromoutsideofChina,i.eUnitedStates,Canada,Australia,Japan,Russia,UnitedKingdom,SouthAfrica,Mongolia,Kyrgyzstan,andKhazakstan.TheworkshopwassuperblyorganizedbyateamledbyProf.MaoJingwenofInstituteof
简介:借鉴花岗岩区单元—超单元填图理论方法,通过对乌增苏辉长岩体岩石学、岩石化学、微量元素、稀土元素等特征的研究,将岩体划分为四个单元
简介:Themultivariatestatisticalanalysisisprofitablyapplicabletothestudyofconodontmultielementtaxonomy.R-modeclusteranalysesofquantitativeand0-1dataarecarriedoutheretoclassifymorethan6000discreteLowerTriassicconodontspecimensbelongingto108kindsofconodontelementsfromWesternGuangxi.TheresultsofR—modeclusteranalysisrevealmoredirectlytherelationshipamongmanyisolatedconodontelements,andtheyalsoprovethatthere-sultsofthelogicalinferencearebasicallycorrect,i.e.108kindsofconodontelementscanbeidenti-fiedinto32speciesbelongingto11generaofconodonts.TheapplicationofR-modeclusteranalysismultielementtaxonomybythemethod,hasbroughtabout4significantconclusions,whichcanbeusedbyconodontresearchersasreference.
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。
简介:ThehugewinterstormofDecember23–29,2015deliveredheavyrainfallinabroadswathacrosstheUSA,delugingEast-CentralMissouri.Recordhighriverlevelsweresetatmanysites,butdamagesweremostpronouncedindevelopedfloodplainareas,particularlywherehighleveeswerebuiltorriverchannelsgreatlynarrowed.Anaverageof20cmofrainthatmostlyfellinthreedaysimpactedtheentire10300km2MeramecBasin.Comparedtothepriorrecordfloodof1982,thehighestrelativestage(+1.3m)onMeramecRiveroccurredatValleyParkproximalto(1)anewlevee,(2)alandfillinthefloodway,(3)largefloodplainconstructionfills,and(4)tributarycreekbasinsimpactedbysuburbansprawl.Eventhoughonlyasmallfractionofthe1.8millionkm2MississippiRiverwatershedaboveSt.Louisreceivedextraordinaryrainfallduringthisevent,thehugechannelizedrivernearandbelowSt.Louisrapidlyrosetosetthe3rd-highesttothehigheststagesever,exhibitingtheflashyresponsetypicalofamuchsmallerriver.