platinum group rocks
OrIGIn Of plAtInUm-GrOUp mInerAls In mAfIc And UltrAmAfIc rOcKs 1399 f(O 2), the solubility of PGE grows to a ppm level (e.g., Farges et al. 1999, Amossé et al. 2000, Borisov & Palme 2000). A ...
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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.
Platinum-group minerals are the dominant control on the budget of platinum-group elements in ophiolitic chromitites. They vary widely in distribution, morphology, chemistry and Os-isotope ...
At the Western Platinum mine and possibly elsewhere in the west there may be three sections each with PGE peaks at the base and a different Pt/Pd value (Fig. 7; Hiemstra, 1985, 1986). Copper and Ni values are extremely low (<0.05 wt %), as is the sulfur content (0.02 wt %). Platinum, Pd, Cu, Ni, and S all correlate positively.
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MAPS SHOWING PLATINUM-GROUP ELEMENT OCCURRENCES IN THE CONTERMINOUS UNITED STATES, UPDATED AS OF 1993 By Jocelyn A. Peterson INTRODUCTION In conjunction with preparing maps of the geologically ... though permissive host rocks are usually present within the drainages. An exception to this is the reported occurrence
Mar 06, 2020· Amplats's force majeure rocks platinum group metals. Kitco . Mar. 6, 2020, 01:42 PM
In the serpentinizedophiolitic rocks from Skyros island, two distinct assemblages of base metal sulphides (BMS) and platinum-group minerals (PGM) occur. The first (early) generation is associated with chromitites which are enriched in platinum-group elements (PGE). The highest values were recorded in samples from Achladones (Ru 1210, Ir 780, Os 630, Rh 228, Pt 208, Pd 22; all values in ppb).
Platinum gets its name from platina, meaning "little silver," because the Spaniards considered it an unwanted impurity in silver mining operations in Colombia.For the most part, PGMs are found together in ores. Ultramafic and mafic igneous rocks contain high levels of platinum group metals, the granites contain a low percentage of the metals.
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Barnes, S. J., 1993 Partitioning of the Platinum Group Elements and Gold Between Silicate and Sulphide Magmas in the Munni Munni Complex, Western Australia Geochimica et Cosmochimica Acta, Volume 57, p. 1277 - 1290
Introduction. The most commonly invoked mechanism to explain platinum-group element (PGE) mineralization in layered intrusions is collection of the noble metals by sulphide melt that segregated in response to mixing of compositionally contrasting magmas (Naldrett, 1989).Sulphide segregation alone does not fractionate the PGE relative to each other, because of similar D values of all PGE ...
Platinum Group Minerals (PGM's) mined in Tasmania in the past were commonly known as 'osmiridium', an alloy of Os and Ir with minor amounts of other platinoids, especially Ru. However, when detailed analyses were obtained it was found that a compositional range existed, and the alloys ranged
Dec 22, 2016· How does platinum react to a magnet? Time for part 5 of my series on how elements react to a magnet. This time the whole platinum group is thoroughly tested with some improved methods.
Genesis of platinum-group minerals in the Las Aguilas mafic-ultramafic rocks, San Luis Province, Argentina: textural, chemical and mineralogical evidence
Platinum group elements geochemistry of ultramaﬁc and associated rocks from Pindar in Madawara Igneous Complex, Bundelkhand massif, central India V Balaram1,∗, SPSingh2, M Satyanarayanan1 and K V Anjaiah1 1National Geophysical Research Institute (Council of Scientiﬁc and Industrial Research), Uppal Road, Hyderabad 500 007, India.
The article presents a study on the correlations and regularities of rhenium (Re) and the platinum group elements (PGEs) concentrations in mafic and ultramafic ores, rocks, and minerals. It states that Re concentrations in dunites show 0.004 to 2.7 parts per billion (ppb), while the values for...
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Stumpf, EF (1986) Distribution, transport and concentration of platinum group elements. In:Gallagher MJ et al (eds) Metallogeny of basic and ultrabasic rocks. Inst …
These rocks comprise about 8% of the crystalline basement, and thus, form a substantial indigenous source of Pt group elements. Taking this into account, one has to consider Ir concentrations of up to about 0.060 ng/g as indigenous, although the median concentration is …
There are enough platinum group element deposits in the Bushveld Complex in South Africa to supply world demands for many decades or even a century using current mining techniques. Demonstrated reserves and resources published by mining companies make detailed calculations up to a maximum of about twenty years ahead, but there is abundant and adequate geological evidence that these …
The Bushveld Igneous Complex (BIC) is the largest layered igneous intrusion within the Earth's crust. It has been tilted and eroded forming the outcrops around what appears to be the edge of a great geological basin: the Transvaal Basin.It is approximately 2 billion years old and is divided into four different limbs: the northern, southern, eastern, and western limbs.
Native platinum is an exotic mineral specimen and an expensive metal. Unfortunately, well formed crystals of platinum are very rare and the common habit of platinum is nuggets and grains. Pure platinum is unknown of in nature as it usually is alloyed with other metals such as iron, copper, gold, nickel, iridium, palladium, rhodium, ruthenium and osmium.
Crocket, J., Paul, D. & Lala, T. Platinum-group elements in the Eastern Deccan volcanic province and a comparison with platinum metals of the western Deccan. J. Earth Syst. Sci. 122, 1035–1044 ...
Platinum-group minerals within the Ballantrae Complex, SW Scotland. Scottish Journal of Geology, 40(1), 1-5. Stirling; Killin ⓘ Corrycharmaig Power, M. R., & Pirrie, D. (2000). Platinum-group element mineralization within ultramafic rocks at Corrycharmaig, Perthshire: implications for …
Jun 25, 2019· Terence Bell wrote about commodities investing for The Balance, and has over 10 years experience in the rare earth and minor metal industries. Rhodium is a rare platinum group metal (PGM) that is chemically stable at high temperatures, resistant to corrosion and mainly used in the production of automobile catalytic converters.
Sep 10, 2014· Overview. Most of the world's economic deposits of platinum group elements (PGE) including platinum, palladium, rhodium and other rare metals come from layered mafic intrusions (LMI), a rare sequence of rocks formed when repeated bursts of magma cool slowly in giant, subsurface chambers. In 2012, 95% of the world's minable PGEs were extracted from mines in the enormous …
In most rocks, platinum-group minerals range in size from less than a micron to a few hundred microns in diameter, so the presence of PGEs must be confirmed by laboratory analysis. Over 100 minerals contain PGEs as an essential component. PGM extraction and refinement is …
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