Pregled bibliografske jedinice broj: 1154635
Fractional crystallization-induced variations in sulfides from the Noril’sk-Talnakh mining district (polar Siberia, Russia)
Fractional crystallization-induced variations in sulfides from the Noril’sk-Talnakh mining district (polar Siberia, Russia) // Ore Geology Reviews, 90 (2017), 326-351 doi:10.1016/j.oregeorev.2017.05.016 (međunarodna recenzija, članak, znanstveni)
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Naslov
Fractional crystallization-induced variations in sulfides from the Noril’sk-Talnakh mining district (polar Siberia, Russia)
Autori
Duran, C.J. ; Barnes, S-J. ; Pleše, Pia ; Kudrna Prašek, Marko ; Zientek, M.L. ; Pagé, P.
Izvornik
Ore Geology Reviews (0169-1368) 90
(2017);
326-351
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Noril’sk-Talnakh ; Fractional crystallization ; Magmatic sulfideliquids ; Ni-Cu-PGE deposits ; High-resolution X-raycomputed tomography ; Geochemical modeling
Sažetak
The distributionofplatinum-groupelements(PGE)withinzonedmagmaticorebodieshasbeenexten- sively studiedandappearstobecontrolledbythepartitioningbehaviorofthePGEduringfractionalcrys- tallizationofmagmaticsulfideliquids.However, otherchalcophileelements, especiallyTABS(Te, As, Bi, Sb, andSn)havebeenneglecteddespitetheircriticalroleinformingplatinum-groupminerals(PGM). TABS arevolatiletraceelementsthatareconsideredtobemobilesoinvestigatingtheirprimarydistribu- tion maybechallenginginmagmaticorebodiesthathavebeensomewhataltered.Magmaticsulfideore bodiesfromtheNoril’sk-Talnakhminingdistrict(polarSiberia, Russia)offeranexceptionalopportunity to investigatethebehaviorofTABSduringfractionalcrystallizationofsulfideliquidsandPGMformation as theprimaryfeaturesoftheorebodieshavebeenrelativelywellpreserved.Inthisstudy, newpetro- graphic (2Dand3D)andwhole-rockgeochemicaldatafromCu-poortoCu-richsulfideoresofthe Noril’sk-Talnakhminingdistrictareintegratedwithpublisheddatatoconsidertheroleoffractionalcrys- tallizationingeneratingmineralogicalandgeochemicalvariationsacrossthedifferentoretypes(dissem- inated tomassive).DespitetexturalvariationsinCu-richmassivesulfides(lenses, veins, andbreccias), these sulfideshavesimilarchemicalcompositions, whichsuggeststhatCu-richveinsandbrecciasformed from fractionatedsulfideliquidsthatwereinjectedintothesurroundingrocks.Numericalmodeling using themediandisseminatedsulfidecompositionastheinitialsulfideliquidcompositionandrecent DMSS/liq and DISS/liq predicts thecompositionalvariationsobservedinthemassivesulfides, especiallyin terms ofPt, Pd, andTABS.Therefore, distributionoftheseelementsinthemassivesulfideswaslikelycon- trolled bytheirpartitioningbehaviorduringsulfideliquidfractionalcrystallization, priortoPGMforma- tion. OurobservationsindicatethatintheCu-poormassivesulfidesthePGMformedastheresultof exsolution fromsulfidemineralswhereasintheCu-richmassivesulfidesthePGMformedbycrystalliza- tion fromlate-stagefractionatedsulfideliquids.WesuggestthatthesignificantamountofSn-bearing PGM mayberelatedtocrustalcontaminationfromgranodiorite, whereasAs, Bi, Te, andSbwerelikely added tothemagmaalongwithSfromsedimentaryrocks.LargePGMthatarescarceandrandomlydis- tributed mayaccountformostofthewhole-rockPtbudget.Basedonourresults, weproposeaholistic geneticmodelfortheformationofthemagmaticsulfideorebodiesoftheNoril’sk-Talnakhmining district.
Izvorni jezik
Engleski
Znanstvena područja
Geologija
POVEZANOST RADA
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
