简介：TherestorationofforestlandscapehasdrawnmuchattentionsincethecatastrophicfiretookplaceonthenorthernslopeofGreatXing'anMountainsin1987.Forestcanopydensity,whichhascloserelationtoforestproductivity,wasselectedasakeyfactortofindhowmuchtheforestqualitywaschanged13yearsafterfire,andhowfireseverity,regenerationwayandterrainfactorsinfluencedtherestorationofforestcanopydensity,basedonforestinventorydatainChina,andusingKendallBivariateCorrelationAnalysis,andDistancesCorrelationAnalysis.Theresultsshowedthatfireseveritywhichwasinverselycorrelatedwithforestcanopydensitygradewasaninitialfactoramongallthatselected.Regenerationwaywhichdidnotremarkablyaffectforestcanopydensityrestorationinshortperiod,mayshortenthecycleofforestsuccessionandpromotetheforestproductivityofconophoriuminthefuture,Amongthethreeterrainfactors,theeffectofslopewasthestrongest,thepositiononslopewasthesecondandtheaspectwasthelast.

简介：BlueschistaccompaniedbypeliticschistexposealongtheXinlin-XiguitufaultintheToudaoqiaoarea,northeasternChina.Inthispaper,theblueschistissystematicallystudiedonthepetrographyandmineralchemistry.Theamphibolesintheblueschistarezonedfromwinchitecoretomagnesioriebeckite/glaucophanerimtowinchiteoutermostrim.Thepeakmetamorphicconditionsaredefinedbythemineralassemblageofmagnesioriebeckite/glaucophane,epidote,high-Siphengite(Si<7.1),chlorite,albite,hematiteandquartz,indicatinganepidote-blueschistfaciesmetamorphism.TheP-TconditionsareestimatedasT=350–400℃andP=10-12kbar.TheoccurrenceoftheblueschistalongtheXinlin-XiguitufaultstronglysuggeststhefaultisthesuturebetweentheErgunandtheXing'anblockssituatedintheeasternportionsoftheCentralAsiaOrogenicBelt(CAOB).