platinum on plutonic rocks

Platinum, palladium, and rhodium in volcanic and

Interpretation of 40 analyses for platinum, palladium, and rhodium in volcanic and plutonic rocks of the belt indicates a strong geochemical correlation between the two groups of rocks and is in support of their being cogenetic either from directly connected magma chambers and flows or indirectly by selective concentration processes from similar mantle material.

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Geology of Platinum Properties, Mining, and

2021-3-11  In addition to gold bearing sands, deposits of platinum are often found in outcroppings of plutonic rocks like olivine and chromite. The formation of these rocks are a testament to platinum’s pedigree, as all were exposed to extremely high temperature and pressure in order to produce this most valuable of metals.

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Platinum Group Element - an overview ScienceDirect

The platinum-group elements (PGEs), nickel, and chromite deposits coexist in nature and are primarily hosted by mafic–ultramafic plutonic–volcanic rocks. The majority of the chromite and lateritic nickel deposits are exposed at the surface and can easily be identified during geological mapping of

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Hybrid Nature of the Platinum Group Element

We suggest that an in situ interaction between the mafic melt and the sedimentary rocks was responsible for Cr spinel mineralization and the formation of the host rocks. The subsequent subsolidus modification of the initial rocks

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Textures of plutonic rocks - University of Washington

2012-1-2  Exercise: For practice in classifying and naming plutonic rocks, use the IUGS system (see the plutonic diagram in the classification handout) to name the rocks 1 to 4. 1. A phaneritic rock containing 57% plagioclase, 20% orthopyroxene, 19% clinopyroxene, and 4% hornblende. 2.

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Platinum: The mineral native Platinum information

Natural Platinum is fairly impure. It is always associated with small amounts of other element s such as iron, gold, copper, and nickel, and may also contain the rare metals iridium, osmium, rhodium, and palladium. These impurities can lower its specific

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Platinum-Nickel-Chromium Deposits ScienceDirect

Platinum-Nickel-Chromium Deposits: Geology, Exploration, and Reserve Base is the first reference book to combine information on the discovery of numerous minerals within existing deposits. This book recognizes the close affinity and great natural coexistence of platinum, palladium, chromium, nickel, copper, gold, and silver hosted by unique stratigraphy (mafic-ultramafic intrusive of layered ingenious

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Distribution of Gold Ill Igneous Rocks - USGS

2011-11-10  24. Plutonic rocks of the White Mountain Plutonic Series, New Hampshire -----25. Some alkalic plutonic rocks from North Carolina and South Carolina -----26. Volcanic rocks from Hawaii -----

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(PDF) Character and tectonic setting of plutonic rocks

B. H. Andersson Roger Nordin (2018): Character and tectonic setting of plutonic rocks in the Gällivare area, northern Norrbotten, Sweden, GFF, DOI: 10.1080/11035897.2018.1526209

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Rocks: Igneous, Sedimentary Metamorphic Rocks,

2 天前  There are two types of rocks based on the presence of acid-forming radical, silicon, acidic rocks and basic rocks. Intrusive igneous rocks (Plutonic rocks) If magma cools slowly at great depths, mineral grains formed in the rocks may be very large. Such rocks are called intrusive rocks or plutonic rocks

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Geological Models of Platinum Group Elements (PGE ...

2017-11-22  asedimentary and meta-plutonic rocks intensively reworked and dismembered in the Pan-African belt north of the Congo craton (Pénaye et al., 2004). The Nyong Series (coined as Nyong Group, e.g. Lerouge et al., 2006; Owona et al., 2011; Owona et

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Platinum Mining in the Transvaal Johnson Matthey ...

2021-3-11  The Bushveld igneous complex is a vast composite body of plutonic and volcanic rocks in the central part of the Transvaal. It is irregularly oval in shape, measuring some 280 miles along its major axis with a maximum width of roughly 150 miles, and covers an area of about 15,000 square miles.

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USGS Mineral Resources Program Platinum-Group

2014-7-24  Platinum-Group Elements—So Many Excellent Properties. ... deposits are found with volcanic and plutonic rocks that form where large volumes of mafic magma ... Erosion of PGE-enriched rocks and physical concentrations of heavy mineral particles, by the action of moving water, can produce PGE-enriched placer deposits. Great Dyke .

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Rhenium-osmium isotope systematics and platinum

2013-3-19  normalized platinum group element (PGE: Ru, Rh, Pd, Ir, Os, Pt) abundance patterns in slightly to moderately melt-depleted lherzolite suggest that all or most of these elements are compatible during melting (Rehkämper et al., 1997; Lorand et al., 1999). We use the term cumulate to refer to plutonic rocks formed by partial crystallization from a

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Platinum‐group Element Geochemistry of Magnetite

The concentrations of platinum‐group elements (PGE) have been analyzed in primary magmatic magnetite samples from the Zhireken, Shakhtama and Aksug porphyry Cu‐Mo deposits (Siberia, Russia) by laser ablation‐inductively coupled plasma mass spectrometry to determine the range of PGE contents in magnetites and to check whether magnetite from two main rock suites (barren plutonic suite and ...

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Platinum: The mineral native Platinum information

Platinum is rare, with few noteworthy occurrences. Russia is the most important producer of Platinum specimens, producing fine nuggets along a north-south belt along the spine of the Ural Mountains. The districts producing the largest specimens are Nizhniy-Tagil in

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Textures of plutonic rocks - University of Washington

2012-1-2  Textures of plutonic rocks: Refer to the lab handout on volcanic rocks because many of the same terms apply to plutonic rocks, e.g., crystallinity, grain size, crystal form, shapes and habits. The following textural terms are commonly used for plutonic rocks. These terms are used to

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Geology, Mineral Chemistry, Thermobarometry,

2017-1-20  plutonic rocks have Mesoarchean ages. The old domain includes the 2.9 to 3.0 Ga greenstone belts at Finlayson and Lumby Lakes and the 3.0 Ga Marmion batholith (Davis and Jackson, 1988), and is intruded by younger plutonic rocks represented by the 2.69 Ga White Otter Batholith (D. Davis, personnal communications, 1993).

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(PDF) Melt Inclusions in Plutonic Rocks Thomas

MI in plutonic rocks are 2003, Sobolev 1996, Frezzotti 2001, Hauri et al. commonly completely crystalline and contain a 2001, Anderson 2003, Schiano 2003). MI in distorted bubble that is not always recognizable, volcanic rocks are commonly large (>50 µm), and are much more likely to have reequilibrated glassy and contained in fresh and ...

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Rocks: Igneous, Sedimentary Metamorphic Rocks,

2 天前  Rocks are an aggregate of one or more minerals held together by chemical bonds. Feldspar and quartz are the most common minerals found in rocks.; The scientific study of rocks is called petrology.; Based on the mode of formation three major groups of rocks

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Platinum Mining in the Transvaal Johnson Matthey ...

2021-3-11  The Bushveld igneous complex is a vast composite body of plutonic and volcanic rocks in the central part of the Transvaal. It is irregularly oval in shape, measuring some 280 miles along its major axis with a maximum width of roughly 150 miles, and covers an area of about 15,000 square miles.

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Geological Models of Platinum Group Elements (PGE ...

2017-11-22  asedimentary and meta-plutonic rocks intensively reworked and dismembered in the Pan-African belt north of the Congo craton (Pénaye et al., 2004). The Nyong Series (coined as Nyong Group, e.g. Lerouge et al., 2006; Owona et al., 2011; Owona et

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2. Igneous Rocks Geological Introduction

2.2.3 Plutonic Rocks. ... The platinum bearing Merensky Reef (MR) is generally a conformable horizon of the BIC and it is accepted that this band is the first layer after a new magma influx was injected into the settling chamber, raising its temperature and introducing platinum. That is why the MR has a pegmatitic texture, with a much coarser ...

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USGS Mineral Resources Program Platinum-Group

2014-7-24  Platinum-Group Elements—So Many Excellent Properties. ... deposits are found with volcanic and plutonic rocks that form where large volumes of mafic magma ... Erosion of PGE-enriched rocks and physical concentrations of heavy mineral particles, by the action of moving water, can produce PGE-enriched placer deposits. Great Dyke .

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Rhenium-osmium isotope systematics and platinum

2013-3-19  normalized platinum group element (PGE: Ru, Rh, Pd, Ir, Os, Pt) abundance patterns in slightly to moderately melt-depleted lherzolite suggest that all or most of these elements are compatible during melting (Rehkämper et al., 1997; Lorand et al., 1999). We use the term cumulate to refer to plutonic rocks formed by partial crystallization from a

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Textures of plutonic rocks - University of Washington

2012-1-2  Textures of plutonic rocks: Refer to the lab handout on volcanic rocks because many of the same terms apply to plutonic rocks, e.g., crystallinity, grain size, crystal form, shapes and habits. The following textural terms are commonly used for plutonic rocks. These terms are used to

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Platinum: The mineral native Platinum information

Platinum is rare, with few noteworthy occurrences. Russia is the most important producer of Platinum specimens, producing fine nuggets along a north-south belt along the spine of the Ural Mountains. The districts producing the largest specimens are Nizhniy-Tagil in

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Folsom District (MRDS #10310613) AU - USGS

Structurally, the metamorphic rocks and some of the plutonic rocks have been deformed by folding and faulting. The major fault zones typically trend northerly or northwesterly, although in places intrusion of the younger plutons has deformed some of the zones so as to assume other trends as well. ... Platinum was probably derived from erosion ...

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(PDF) Melt Inclusions in Plutonic Rocks Thomas

MI in plutonic rocks are 2003, Sobolev 1996, Frezzotti 2001, Hauri et al. commonly completely crystalline and contain a 2001, Anderson 2003, Schiano 2003). MI in distorted bubble that is not always recognizable, volcanic rocks are commonly large (>50 µm), and are much more likely to have reequilibrated glassy and contained in fresh and ...

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Distribution of Gold Ill Igneous Rocks - USGS

2011-11-10  Distribution of Gold Ill • Igneous Rocks By DAVID GOTTFRIED, JACK ].ROWE, and ROBERT I. TILLING GEOLOGICAL SURVEY PROFESSIONAL PAPER 727 An investigation of the abundance and distribution of gold in plutonic and volcanic rocks of diverse magma types and tectonic settings UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON: 1972

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