IN CHROMITE VERSUS SEDIMENTARY PGE SIGNATURES B. Schmitz , P. R. Heck, C. Alwmark, N. T. Kita, B. Peucker-Ehrenbrink, T. Ushikubo, and J. W. Valley, Department of Geology, Sölvegatan 12, Lund University, SE-22362 Lund, Sweden, [email protected], Department of Geology and Geophysics, University of Wisconsin, 1215 W. Dayton St., Madison, WI 53706, USA, Department of Marine Chemistry and G...

Heavy metal concentration in the soils and sediments has increased worldwide during the last century due to the mining, smelting, and industrial activities. The Forumad chromite deposit is located in the Sabzevar ophiolitic complex (SOC), with a long history of mining activities, yet very little is known about the heavy metal contamination in its surrounding environment. In this research work, ...

Magmatic sulfide deposits are the most significant source of platinum-group elements (PGE) in the world. Key to understanding their genesis is determining the processes and timing of sulfide saturation, metal enrichment and crustal contamination. In this study, we have identified droplets of magmatic sulfide from the Platreef, South Africa, where droplets of sulfide have been trapped in the ear...

Six minor alluvial chromite placers (Kolkhoznyi Prud, Verkhne-Yaushevo, Sukhoy Izyak, Bazilevo, Novomikhaylovka, Kiryushkino) and one major littoral placer (Sabantuy) were found in sandy sediments of the Kazanian stage Permian System (Late Roadian Wordian Stages) Southern Pre-Urals. It is shown that morphological features chromian spinels are diverse, which not evidence heterogeneity source. Th...

The Bou Azzer district in the central Anti-Atlas of Morocco is world’s unique mining where Co exploited from serpentinite-hosted hydrothermal Co-Ni-Fe arsenide ores. This paper provides first-ever mineralogical and geochemical characterization a suite Fe-rich orebodies found during recent Ait Ahmane area, district. These are lens-like massive disseminated ores fully hosted serpentinites (hereaf...

Al Huwaysah 010 is an ungrouped achondrite meteorite, recently referred to as a brachinite-like meteorite. This showing fine-grained assemblage of low-Ca pyroxene and opaque phases, strongly reduced in comparison other brachinites. The occurrence some tiny plates graphite oldhamite this meteorite suggests that partial melt residue has experienced further reduction process. Olivine, the most abu...

Chromite ore processing residue (COPR), derived from the so-called high lime processing of chromite ore, contains high levels of Cr(III) and Cr(VI) and has a pH between 11 and 12. Ferrous sulfate, which is used for remediation of Cr(VI) contamination in wastewater and soils via reduction to Cr(III) and subsequent precipitation of iron(III)/chromium(III) hydroxide, has also been proposed for rem...

Archaean komatiites of the greenstone belt in Manica area, western Mozambique contains accessory amount of disseminated chromite grains. The komatiite rocks comprise peridotitic and basaltic komtiite. These komatiites are affected by regional metamorphism as all of the studied area. It is observed that only chromian spinel is preserved as the primary mineral and that all the other primary miner...