简介:Theresultsof118REEanalysesofLi-FgranitesfromSouthChinaandothercountriesindicatethattherearethreevariationtypesofREEpatterncurveswithdifferentevolutiontrendsfromearlytolatestagesofLi-FgranitecomplexoffromlowertoupperpetrofaciesoftheLi-Fgranitebody;(1)thedecreasing,(2)theincreasing,and(3)thesaltatoryvariationtypes.Thefirstvariationtypeiscalledthepositiveevolutiontype,attributedtocrystallizationdifferentiation.Thesecondiscalledthereversionevolutiontype.whichrepresentsliquidsegreationdominatedbyvapor-liquiddistillation.Thethirdiscalledthesaltatoryvariationtype,whichisformedfromliquidsegregationdominatedbyimmiscibilty,Therefore,theindicaticesofliquidsegregationdominatedbyimmiscibilityarethesaltatoryvariationtypeofREEpatternevolutionandtheseparationofthemainevolutiontrendlineseitherfromthesub-evolutiontrendlinesorfromthecompositionpointsofLi-FgranitesinthediagramsofREE-(La-Yb)NandLa/Sm-La,Theindicatricesofliquidsegregationdominatedbyvapor-liquidfractionaldistillationarethereverstionevolutiontypeofREEpatterncurvesandthemainevolutiontrendlinesofLi-Fgranitesdirectingtotheupperright-handontheREE-La/Yb)NandLa/Sm-Ladiagrams.
简介:WintertemperatureinChinaduringthelast500yearswasconstructedbasedonhistoricaldataaboutthefreeze-upevents,theheavysnowandtheagriculturaldamagesbroughtaboutbycoldweathersinEastChina(25°N--35°N,115°E--120°E).Fisrt,thedataaboutthefreezingofriversandlakesandthoseaboutsnowfallinthisregionwerecompiledandevaluatedonthebasisofanordinalscale.Thentheseriesoffreeze-upeventsandheavysnowwereproducedseparatelyandthecombinationoftheseserieswasmadetogenerateaconsistentseriesthatreflectsthechangesinthedegreeofcoldnessinwinterduringthelast500years.Finally,areconstructionofwintertemperaturewascarriedoutataresolutionof10yearsbasedonacalibrationofaregressionbetweenrecenttemperatureobservationsandthecoldwinterseriesconstructed.