1.. IntroductionDeposits containing Ni, Cu and platinum-group elements (PGE) are usually associated with mafic and ultramafic rocks. The deposits may be subdivided into two groups (Naldrett, 1981). (i) Ores with Ni and Cu as the principal products and where the noble metals (PGE and Au) are byproducts.

Rock samples from about 280 podiform chromite deposits in California and Oregon were analyzed for Pt, Pd, Rh, and Ir by fire assay-atomic absorption and spectrographic techniques to estimate by-product platinum-group element potential of chromite mining. These deposits include ophiolites from the Sierra Nevada, Klamath Mountains, Coast …

The Platinum Group Elements (PGE: Osmium, Iridium, Ruthenium, Rhodium, Platinum, and Palladium), also known as platinum group metals and platinoids, are transition metals located in the d-block of the Periodic Table of Elements (Groups VIII, IX, and X, Periods 5 and 6).The atomic radii of the Os, Ir, and Pt subgroup, caused by …

Platinum-group-minerals (PGM) inclusions have been found in Al-rich chromitites from the southern part of the Oman ophiolite. In contrast to other ophiolitic complexes, laurites (RuS2) are the ...

Native Platinum is the most significant source of the element platinum, although considerable quantities are also mined from the rare platinum arsenide mineral Sperrylite. The rare metals iridium, osmium, rhodium, and palladium are almost exclusively mined together with platinum in platinum deposits. Platinum has a number of industrial uses …

The list of PGMs is: Iridium (Ir) Osmium (Os) Palladium (Pd) Platinum (Pt) Rhodium (Rh) Ruthenium (Ru) Alternate Names: The …

Platinum-group elements (PGE) are critical commodities. They are essential for the U.S. economy; however the U.S. imports about 90 percent of the platinum-group elements that we need to use. The project objective is to assess the Duluth Complex and related mafic-ultramafic intrusions in the 1.1 Ga Midcontinent Rift System in the Lake …

Platinum represents one of the rarest metals on Earth. Seldom occurring on its own, it exists with other metals in the Platinum Group Elements (PGEs): rhodium, ruthenium, palladium, osmium and iridium, and occasionally alongside gold and diamonds. Platinum can be found in alluvial placer deposits in flakes or in small grains.

This chapter describes the production of concentrates containing the platinum-group metals (PGMs). South Africa is the largest primary producer of PGMs followed by Russia. South African ores typically contain 3–4 g/tonne of PGM ore, which becomes 100–200 g/tonne after flotation. There are two main types of ores namely; feldspathic ...

The platinum-group metals (PGMs) are iridium, osmium, palladium, platinum, rhodium, and ruthenium. In general, PGMs exhibit high density, high electrical conductivity, high melting points, and low reactivity. Platinum is commercially the most important of the PGMs. Platinum occurs in dark silicate rocks with minerals that contain iron and ...

The major deposits of platinum-group elements (PGE) of the Earth are associated with ultramafic and mafic igneous rocks. The bulk of current PGE production …

This paper discusses whole-rock geochemistry, mineral chemistry, and platinum group element (PGE) systematics of depleted mantle rocks (harzburgite and dunite) from the northern part of Nagaland ...

The platinum-group elements (PGEs)—platinum, palladium, rhodium, ruthenium, iridium, and osmium—are metals that have similar physical and chemical …

Rare earth and platinum group metals are often found clustered together in the earth's crust. Mining for platinum, for instance, also yields Rhodium and Ruthenium belonging to the same group. ... The rock is usually formed deep in the crust when a large body of liquid rock cools. But the feldspars crystallise first, giving the large colourful ...

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The catalytic properties of the six platinum group metals (PGM)– iridium, osmium, palladium, platinum, rhodium, and ruthenium – are outstanding. Platinum's wear and tarnish resistance characteristics are well suited for making fine jewelry. Other distinctive properties include resistance to chemical attack, excellent high-temperature ...

The H202 Test for Platinum. Gather the following items: Hydrogen Peroxide (2-3% H₂O₂ from a pharmacy works fine) A glass, jar, or any other liquid container (preferably glass or ceramic) Your piece of possible platinum. You should use proper PPE when doing any chemical reaction, but considering most of us have scrubbed open cuts …

Platinum Group Metals, an assortment of six rare, naturally occurring elements, have been sought after since at least 700 B.C.E. Known for their beauty, high melting point and chemical inertness, investors look to this group as an essential part of a diverse portfolio. Because no other resource can compare to the value that Platinum …

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The shapes of plutonic–volcanic igneous host rock include batholiths, lopoliths, laccoliths, stocks, sills, dikes, and lava flows. The relationship with country rock is conformable and/or unconformable. Major primary platinum group of metals, nickel, and chromium deposits occur mostly in greenstone belt and mafic to ultramafic host rock.

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On assay of 500 g of the crushed rock, taken in several samples, platinum was found to be present to an amount of 0.0107 per cent, or about 3 oz to the ton." ... [Re-assembled from Fig. 7.22. in SV 23: Platinum-Group elements: Mineralogy, Geology, Recovery. L.J. Cabri, Editor. Reprinted with permission of the Canadian Institute of …

The platinum-group minerals (PGM) are a diverse group of minerals that concentrate the platinum-group elements (PGE; Os, Ir, Ru, Rh, Pt, and Pd). At the time of writing, the International Mineralogical Association database includes 135 named discrete PGM phases. ... (A, C, E, G, J and K) chromitites. Whole-rock abundances of the PGE range from ...

Platinum and Pd are locally enriched in drill-hole intercepts, but zones appear unrelated to rock type, magnetic properties, or to S, Cu, Ni, Cr, or Au values. Local platinum group element (PGE) enrichment in altered rocks implies metamorphic and/or hydrothermal redistribution.

While whole-rock peridotite Re-Os isotopic signatures are the core of such investigations, the Re-Os dating of individual peridotite minerals—base metal sulfides (BMS) and platinum group minerals (PGM)—that are the main hosts for Re and Os in the mantle peridotites came into play two decades ago.

The platinum-group elements (PGE) and gold have been determined in twenty international rock reference materials by inductively coupled plasma-mass spectrometry (ICP-MS) after pre-concentration by ...

The Platinum Group Elements (PGE: Osmium, Iridium, Ruthenium, Rhodium, Platinum, and Palladium), also known as platinum group metals and platinoids, are …

Mafic-ultramafic deposits hosted by intrusive rocks are an important source of valuable minerals and metals such as Ni, Cu, platinum group elements (PGE), and Cr (Cawthorn et al., 2005). The ...

The platinum-group elements (PGEs)—platinum, palladium, rhodium, ruthenium, iridium, and osmium—are metals that have similar physical and chemical properties and tend to occur together in nature. ... Acid rock drainage from reef-type and contact-type deposits is unlikely because the ores and their host rocks contain low …

Bulk rock concentrations of platinum group elements (PGEs) were analyzed by the Ni-sulfide fire assay–isotope dilution inductively coupled plasma mass spectrometry (ICP-MS) method of Park et al. (2012), and Re and Os isotope ratios were measured by isotope dilution thermal ionization mass spectrometry (TIMS) using a …