U‐Pb_ReduxDemo(fromEARTHTIMEIVmeeting)Settingup
Downloadtoyourdesktopandunzipthetwofoldersavailableathttp://cirdles.cs.cofc.edu/blog/?page_id=21.
Eachfoldercontainsthreesub‐folders:
• The“data”subfoldercontainstherawdatafilesintheMassLynx.xlsformat.Toseetherawdata,gotothe“CYCLE”worksheetinanyofthe.xlsfiles.
• The“Tripoli”subfoldercontainsTripoliworkfilesforeachUandPbanalysis,recordingwhichratiosareusedinthemeasuredratiostatistics
• The“Redux”subfoldercontainsafolderforeachaliquotinthesample.Thezirconaliquotfolderhasthe.xmlfileswiththeexportedstatisticsforeachPborUanalysis.
Tripoli
OpenTripolibydouble‐clickingontheTripoliicon.
IntheDataFilemenu,choosethefirstoption:“ReadMassLynxExcelDataFile”.
Navigateto“Desktop\CM2\CM2Data”andselectCM2_z15_Pb.xls.
Clickthe“GRAPHSelected”buttononthebottomrightoftheTripoliwindowtoseethecycledataforthisanalysis.Removethefirsttwoblocksofthe206/204,207/204,208/204,and204/205ratios,sincetheyhavebeenaffectedbyanearlyelevatedbaseline.Todothis,right‐clickanywhereintheblock(delineatedbyverticallines)thatyou’dliketoexcludefromthemeanstatistics.Excludedratiosdisplayasredpoints;originalstatisticsareinblueontheleftofeachratio’swindow,andupdatedstatisticsaredisplayedinblackattheright:
CheckifasetofratiomeasurementshasanyoutliersbyemployingChauvenet’sCriterion.Atthelowerrightofoneoftheratiowindows,clicktheratiobuttonnexttoChauvenet.
Closethegraphwindow,thensaveyourworkbygoingtotheTripoliFilemenuitemandclicking“SaveAsTripoliWorkFile.”
Navigateuponelevel(thesmalliconwiththeuparrowatthetopofthewindow),thenchoosethefolder“CM2Tripoli”andsavetheworkfilethere.
ExportyourreduceddatainarobustformatthatReduxcanimport.Clickthe“ExportSavedWork”menuitemandchoose“ExportCheckedRatiostoU‐Pb_ReduxImportFractionFile.”Choosethedefaultsampleandaliquotnames.
Inthesavedialog,navigateuponelevel,choosethe“CM2Redux”folder,thenthe“zircon”subfolderandsavethe.xmlfilethere.
Next,openaUdatafilebygoingbacktotheDataFilemenuandclickingon“ReadMassLynxExcelDataFile.”Navigateuponelevel,selecttheCM2Datafolder,andloadin“CM2_z15_U.xls”.Tripoliwillreadin270/267and265/267U‐oxideratiosandperformoxidecorrection,displayingtheresultsinblue:
Inspectthecycledatabypressingthe“GRAPHSelected”button,thenclosethegraphwindowandchoose“SaveAsTripoliWorkFile”fromtheTripoliFilemenu.
Navigateuponelevel,choosethe“CM2Tripoli”folder,andsavetheTripolifilethere.Exportthesaveddatabyclickingthe“ExportSavedWork”menuandexportingthe.xmlfiletotheCM2Redux\zirconfolder.
ExitTripolibyclosingitswindow.
UPb_Redux–Importing.xmlfiles
Inthe“U‐PbSampleFiles”menu,choose“NewAnalysisSampleFileFrom…”“ID‐TIMSTripoli‐preparedXMLfiles”.You’llgetawindowthatlookslikethis:
Keepthe“ChooseDataUpdateMode”radiobuttonon“AutomatedDataUpdate”andclick“OK”atthebottomofthewindow.Atthepromptfora“ReduxSampleFractionsFolder”,gotothedesktop,opentheCM2folder,andclickonceonthe“CM2Redux”folder.Hit“Choose”atthebottomofthewindow.Savethenew.reduxfiletothedesktop,andkeepthedefaultname(CM2.redux).
ThemeasureddatahasnowbeenloadedintoRedux.GototheLabDatamenuitemintheReduxwindowandexplorethetabs,whichcontrolinputmodels.
ToimporttheET535tracer,navigatetotheTracertabofthiswindowandselectthe“Tracers”menuitem.Select“ImportTracerfromEarth‐Time.org,”choose“ET535v.2.xml”inthedialogbox,thenhitOK.ExitLabDatabyclickingtheclosebuttonatthetoprightofthewindoworclickingthelargeOKbuttonatthebottomofthewindow.
Openthealiquotwindowbyclickingonthebuttonlabeled“zircon”atthetopleftoftheReduxwindow.Thisistheplacetoenterallinputvalues,models,anduncertainties.
Reductionparameterswillbefilledwiththeintendedvalueswhenyouopenapre‐made.reduxfileshortly.Exitthisscreenbyclickingthe“Save&Close”windowatthebottomleftofthealiquotwindow.
Openapre‐savedReduxfilewiththesamedata.Inthe“U‐PbSampleFile”menu,choosethe“OpenSampleFile”option.Navigatetothedesktop,openthefolder“CM2”,thenthesubfolder“CM2Redux”.Doubleclick“CM2_11‐2‐09.redux”toopenthereduceddatafile.
Examinethefilleddatatable,thenclickthe“Reports”menuitemandchoose“EditCurrentReportSettings”tocustomizethedatatablesetup.Thesetupwindowisshownatleft.Exitthesettingswindowbyclickingthe“Close”buttonatthebottomofthewindow.
Redux–DateInterpretations
Clickthe“SampleDateInterpretations”buttonatthebottomrightoftheReduxwindowtobringuptheDateInterpretationswindow.Youcanpan,zoom,anduseavarietyoftoolstochangetheconcordiaplotappearance.
IntheConcordiaPlotOptionsmenuatthetopofthewindow,click“Sample”toseehowyoucancustomizetheplotappearance,and“Aliquot”toseehowtocustomizedisplaysettingsforeachaliquot.
Next,takeaweightedmeanofthealiquot.InthepanelontheleftoftheInterpretationswindow,double‐clickonthefolderlabeledCM2todisplayalistofitsaliquots—here,only“zircon”.Right‐clickontheword“zircon”tocreateanewdateinterpretation.Choosethe“weightedmean207/206date”option,likeatleft,andclickOK.
Clicktheplussignnexttothenew“Fractions”foldertoseealistofallthefractionsinthealiquot.Right‐clickthefolderandchoose“SelectAllFractions”toaddthemalltotheweightedmean.
Anewtextboxappearsintheconcordiawindow.Dragittothelowerrightoftheconcordiaplot,outofthewayoftheellipses.Togglethecheck‐boxesonthelefttoincludeorexcludefractionsfromtheweightedmean.Theweightedmeanstatisticschangeinrealtime.
Next,displaytheweightedmeanplotfortheweightedmean207/206date.Clickthe“WeightedMeansChooser”menuatthetopofthescreen.Aboxishighlightedunderneaththecolumn“207Pb/206Pb”.Clicktheboxtocheckit,thenclickok.
Beneaththeconcordiawindow,clickthetablabeled“WeightedMeans”.
Explorethedisplayandorderingoptionsfortheweightedmeanplot.Checkandun‐checkfractionsattheleftofthewindowtoincludeorexcludethemfromtheweightedmeans,andwatchthestatisticschangeinrealtime.
ClosetheDateInterpretationswindowwiththeclosebuttonatthebottomleftofthewindow.Allworkissaved,andwillreappearwhenyoure‐openthewindow.
UPbRedux–FractionInspectionandVisualization.
InthemainReduxwindow,clickthebuttonlabeled‘z2’atthetopofthewindow.Thiswasthefractionwiththeoldest207Pb/206Pbdate.
ExaminetheKwikiwindow.Clickondifferentbarsinthevariancebreakdowngraphstodisplaytheirnameandcontribution.Clickanddragsliderstomovetheellipseonconcordiaandchangetheoutputs.Youcanaddintracer(+Tr)ordecayconstant(+L[ambda])uncertaintiesforthisfractionatthebottomleftofthescreen,aswellasimplementingTh‐andPa‐correctionbycheckingtheirboxes.Toresetasingleslider,left‐clickitonce.Toresetallsliders,pressthe“ResetAllSliders”buttonatthetopofthesliderbank.
Totogglebetweenvariancecontributionsinthebarcharts,left‐clickinthecolumnaboveeachbar.Correlatedinputsaredisplayedtogether,withthecontributionfromtheircovariancedisplayedaboveorbelowtheaxisifit’spositiveornegative.
ClosetheKwikiwindowbypressingthe“Save&Close”or“Close”buttonsonthebottomofthewindow.Noneoftheinputvaluesoruncertaintieschangedwithslidersissaved.
Savethedata,reductionparameters,anddateinterpretationsforthisaliquot.Clickthebuttonlabeled“zircon”atthetopleftofthescreen,andclickthe“SaveandExportAliquot”buttonatthebottomrightofthewindow.Namethealiquot“CM2.xml”andsaveittotheDesktop.
OtherWaystoBringDataIntoRedux
Thefollowingwillbepresentedontheprojectedscreen:Typingmeasureddatainbyhand(withoutTripoli);typingreduceddatainbyhand(LegacyMode),forinstancefromapublisheddatatable.ImportingdatafromtheGeoChrondatabasewillbedemonstratedaspartofthenextexercise.
Redux–CompilationMode
Compilationmodecompilesmeasureddata,reductionparameters,anddateinterpretationsfrommultiplesamplesforinterpretationtogether.
IntheReduxmainwindow,gotothe“U‐PbSampleFile”menuitemandchoose“NewCompilationofAliquotsintoaSuper‐SampleFile”.Inthenewwindow,enterthenameforthisfileas“CMCompilation”,leavetheradiobuttonfor“SourceofAliquots”on“SingleLocalAliquot”andclick“OK”.
Navigatetothedesktopanddouble‐clicktheCM2.xmlfileyouexportedearlier.Whenprompted,savethecompilationfileonthedesktopas“CMCompilation.redux”.
AllofthesavedCM2datahasbeenbroughtin.Importanotheraliquotbyclickingthe“U‐PbSampleFile”menuandchoosingthe“ManageSampleModel”option.Leavetheradiobuttonon“SingleLocalAliquot”andclickOK.NavigatetothedesktopandchooseCM1.xml.Goto“ManageSampleModel”againanddothesamefor“CM_Legacy.xml”.
Goto“ManageSampleModel”onemoretime,andthistimechoosethe“ImportSingleAliquotfromGeochronDatabase”option.ClickOK.Inthepromptforthe“aliquotchildIGSN”,enter“NMM000007”(fivezeros)andpressOK.
Scrolltothebottomofthedatatabletoconfirmthatitimportedsuccessfully.
ClicktheSampleDateInterpretationswindowtoseeallofthesamplesplottedtogether.NoticethatthealiquotdateinterpretationssavedinCM2.xmlhavebeenimportedaswell.
Right‐clickthenewaliquotCM3ontheleftpanel,andaddthe206/238weightedmeandate.Right‐clickthefractionsfolderandchoose“Selectall”toaddallthefractionstotheweightedmean.
DothesameforCM2—addthe206/238weightedmeandataandaddallfractions.Clicktheweightedmeanschooserinthemenuatthetopofthewindow,andselecttheboxesunderneath206Pb/238UfortherowsCM2andCM3.ClickOK.
Clicktheweightedmeanstabbeneaththeconcordiaplottoshowtheweightedmeanplotsforbothandcomparethetwo.
