LiveZilla Live Chat Software

Constellation, le dépôt institutionnel de l'Université du Québec à Chicoutimi

PGM in the stillwater chromitites and implications for the magmatic processes that formed the ultramafic part of the stillwater complex

Prichard Hazel Margaret, Barnes Sarah-Jane, Fisher Peter Charles, Pagé Philippe et Zientek Michael L.. (2014). PGM in the stillwater chromitites and implications for the magmatic processes that formed the ultramafic part of the stillwater complex. Dans : 12th International Platinum Symposium , 11-14 August 2014, Yekateringurg, Urals, Russia.

[img] PDF
Administrateurs seulement

1MB

Résumé

The distribution of PGM provides insights into the processes forming PGE deposits. PGM have been located in 8 chromitite layers from basal layer A to top layer Kin the ultramafic units below the economic PGE-rich JM reef in the Stillwater complex, USA. Within chromite grains most PGM are laurite, with rarer, smaller PPGM including malanite [CuPtRh(+/-lr)SJ and Pt-Pd-sulfides. Interstitial to chromite grains PPGM dominate including Pd-Pb, PtPdtellurides, sperrylite, platarsite, minor laurite and one grain of Pd-Ge. The laurite shape reflects formation and varies from mainly round in lower and upper layers, to euhedral in the thicker middle G layer. The Os content of laurite is lowest and silicate inclusions with laurites are most abundant in layer G. Rutile inclusions are most abundant in layer B. Trace Rh in laurite and PPGM with laurite are most abundant in the uppermost layer Kand laurite size increases upwards. Each layer has a distinct PGM assemblage. Within chromite grains IPGE- and PPGE-PGM are greatest in the upper layers suggesting increasing PGE content in the magma upwards whereas interstitial PGM associated with BMS indicate sulphur saturation occurred between chromite grains in the lower layers.

Type de document:Matériel de conférence (Article)
Date:2014
Sujets:Sciences naturelles et génie > Sciences naturelles > Sciences de la terre (géologie, géographie)
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Unité d'enseignement en sciences de la Terre
Déposé le:06 juill. 2016 17:51
Dernière modification:09 déc. 2016 16:04
Afficher les statistiques de telechargements

Éditer le document (administrateurs uniquement)

Creative Commons LicenseSauf indication contraire, les documents archivés dans Constellation sont rendus disponibles selon les termes de la licence Creative Commons "Paternité, pas d'utilisation commerciale, pas de modification" 2.5 Canada.

Bibliothèque Paul-Émile-Boulet, UQAC
555, boulevard de l'Université
Chicoutimi (Québec)  CANADA G7H 2B1
418 545-5011, poste 5630