platinum group chromite

Experiments and Models Bearing on the Role of Chromite as ...

inum group minerals included within magmatic chromite grains. In the course of experiments involving the reequilibration or growth of chromite and Crspinel in molten silicate, we observe that platinum group minerals (PGM; including metal alloys and laurite) form at the mineral^melt interface. The formation of PGM to the extent

MORE INFO

Vol. 41, No. 3/4 Pennsylvania

Platinum Group Elements in Some Chromite Occurrences in the State Line District, Chester and Lancaster Counties, Pennsylvania Page 3 The National Coal Resources Data System (NCRDS)—An Update (and the End of an Era for a FederalState Cooperative Program?) Page 14

MORE INFO

Composition and textures of chromite and platinumgroup ...

Chromitite bodies hosted in the Neoproterozoic western ophiolitic belt of Pampean Ranges of Córdoba (Argentina) were studied at Los Congos and Los Guanacos ultramafic bodies, with regard to the composition and textures of the chromite and platinum group minerals.

MORE INFO

Chromite, platinum group elements and nickel ...

Chromite, platinum group elements and nickel mineralisation in relation to the tectonic evolution of the Dun Mountain Ophiolite Belt, east Nelson, New Zealand R. L. Brathwaitea, A. B. Christiea and R. Jongensb aGNS Science, PO Box 30368, Lower Hutt, New Zealand; bAnatoki Geoscience, 64 Skibo Street, Dunedin, New Zealand ABSTRACT

MORE INFO

chromite gold separation in south africa

Jul 08, 2018· Platinumgroup metalsa resource in the tailings of chromium mines . tailings of chromium mines in South Africa separation of the chromite grains from the silicate im . gold, platinum, and palladium, nickel sulphide as a col.

MORE INFO

Platinumgroup minerals in chromite seams of the ...

Platinumgroup minerals are present as inclusions in both disseminated and massive chromite but are modally more abundant in massive chromite, in the ultramafic zone of the Stillwater Complex. They are small, generally less than 20 mu in diameter and characterized by euhedral and subhedral habits.

MORE INFO

Experiments and Models Bearing on the Role of Chromite as ...

Chromite is widely recognized to act as a collector for platinum group elements (PGE), which tend to be observed as discrete grains of platinum group minerals included within magmatic chromite grains.

MORE INFO

Geochemistry and mineralogy of platinumgroup elements ...

Geochemistry and mineralogy of platinumgroup elements (PGE) in the chromite ores of the RayIz massif have been studied by Volchenko, 1990, Gurskaya, 1995, Gurskaya et al., 2004 and others.

MORE INFO

Experimental constraints on the partitioning of Ru, Rh, Ir ...

Chromite Spinel Platinumgroup elements Ferric iron Mineral/melt partitioning We have performed partitioning experiments to assess the role of chromiumrich spinel in controlling the behavior of the platinumgroup elements (PGEs) during igneous differentiation. Spinels were equilibrated with

MORE INFO

CHROMITE–PLATINUMGROUP ELEMENT MAGMATIC DEPOSITS

CHROMITE–PLATINUMGROUP ELEMENT MAGMATIC DEPOSITS Giorgio Garuti University of Modena and Reggio Emilia, Italy Keywords: chromite, platinumgroup elements, magmatic ore deposits, geotectonic setting Contents 1. Introduction Chromium PlatinumGroup Elements (PGE) 2. Chromium and PGE Geochemistry in Magmatic Systems 3.

MORE INFO

Platinumgroup element abundance and distribution in ...

Platinumgroup elements (PGE) occur in oregrade concentration in some of the chromite deposits related to the ultramafic section of the Acoje Block of the Zambales Ophiolite Complex.

MORE INFO

Origin of Platinum Group Minerals (PGM) Inclusions in ...

analyses of platinumgroup minerals (PGM) from chromite deposits associated with ophiolites. and Alaskantype complexes of the Urals. Composition, texture, and paragenesis of unaltered.

MORE INFO

Palladium, platinum, rhodium, iridium and ruthenium in ...

30 samples of chromitite and chromiterich rocks from two stratigraphic sections, 250 km apart, through the basal ultramafic member of the Samail ophiolite were spectrographically analysed for platinumgroup elements (PGE) and for Co, Cu, Ni and V.

MORE INFO

chromite mineral view

Oct 05, 2018· PlatinumGroup Minerals and Other Accessory Phases in Chromite. Oct 19, 2016 Tiny platinumgroup minerals (PGM), 110 µm in size, have been found in the chromitites. Olivine, occurring in the silicate matrix or included in fresh chromite, has …

MORE INFO

PlatinumGroup Minerals and Other Accessory Phases in ...

PlatinumGroup Minerals and Other Accessory Phases in Chromite Deposits of the Alapaevsk Ophiolite, Central Urals, Russia Federica Zaccarini 1,*, Evgeny Pushkarev 2, Giorgio Garuti 1 and Igor Kazakov 3 ... Chromite deposits containing more than 100 Mt of ore Figure 1.

MORE INFO

Platinumbearing chromite layers are caused by pressure ...

Junge, M., Oberthür, T. Melcher, F. Cryptic variation of chromite chemistry, platinum group element and platinum group mineral distribution in the UG2 chromitite: an example from the Karee ...

MORE INFO

(PDF) Platinumgroup mineral assemblages and chromite ...

Platinumgroup mineral assemblages and chromite composition in the altered and deformed Bacuri Complex, Amapa, Northeastern Brazil. ... group elements, platinumgroup minerals, Amazon, chromite…

MORE INFO

ASSEMBLAGES OF MINERALS AND ... …

ASSEMBLAGES OF MINERALS AND SULFIDES IN SILIGATE LITHOLOGIES AND ROCKS WITHIN THE SHETLAND OPHIOLITE HAZLM. PRICHARD Depamwnt of Geology, University of Wales, College of Cardffi Box 914. Main College, Park Place, Cardffi CFI jYE, United Kingdom ROB A. D(ER

MORE INFO

US4295881A Process for extraction of platinum group ...

A process for treating chromitebearing ores to obtain useful mineral values, especially platinum group metal, therefrom wherein the ore is separated into magnetic and nonmagnetic fractions; the nonmagnetic fraction, containing a substantial portion of the platinum group metals, is concentrated and smelted to produce a metal layer containing ...

MORE INFO

Platinumgroup minerals in the LG and MG chromitites of ...

Junge M, Oberthür T, Melcher F (2014) Cryptic variation of chromite chemistry, platinumgroupelement and mineral distribution in the UG2 chromitite—an example from the Karee Mine, western Bushveld Complex, South Africa.

MORE INFO

Origin of Platinum Group Minerals (PGM) Inclusions in ...

as a potential concentrator of platinumgroup elements (PGE = Os, Ir, Ru, Rh, Pt, Pd). These metals are mainly carried in minute grains (<20 m) of specific platinumgroup minerals (PGM) that occur enclosed in chromite crystals, at the crystal rims or in the interstitial silicate gangue of the chromitite.

MORE INFO