rock mining peridotite

Peridotite - Wikipedia

Peridotite is the dominant rock of the Earth's mantle above a depth of about 400 km; below that depth, olivine is converted to the higher-pressure mineral wadsleyite. Oceanic plates consist of up to about 100 km of peridotite covered by a thin crust; the crust, commonly about 6 km thick, consists of basalt, gabbro, and minor...

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Peridotite: Igneous Rock - Pictures, Definition & More - Geology.com

Kimberlite with diamond: Kimberlite, the rock that is found in many diamond pipes, is a variety of peridotite. The specimen above is a piece of kimberlite with numerous visible grains of phlogopite and a six millimeter octahedral diamond crystal of about 1.8 carats. This specimen is from the Finsch Diamond Mine in South...

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Peridotite | rock | Britannica.com

Peridotite, a coarse-grained, dark-coloured, heavy, intrusive igneous rock that contains at least 10 percent olivine, other iron- and magnesia-rich minerals (generally pyroxenes), and not more than 10 percent feldspar. It occurs in four main geologic environments: (1) interlayered with iron-, lime-, and magnesia-rich rocks in...

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Peridotite - Igneous Rocks - Sandatlas

Olivine, the principal component of peridotite, makes up more than 40% of the pair olivine + pyroxene (or amphibole). A rock type with less olivine is named pyroxenite (or hornblendite if there are more amphiboles than pyroxenes). Peridotite is a plutonic rock, it is mostly composed of visible mineral grains. Other notable...

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Peridotite facts, information, pictures | Encyclopedia.com articles ...

Peridotite. Peridotite is a dark-colored, coarse-grained igneous rock believed by many scientists to be the primary rock of the exterior of Earth's mantle. The rock typically forms in volcanic pipes and is forced to the surface from great depths during a volcanic eruption. Peridotite consists of a dense iron and magnesia mineral...

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Current Mining of Olivine and Serpentine

Properties of olivine. (Mg,Fe). 2. SiO. 4. • Solid solution of forsterite (Mg. 2. SiO. 4. ) and fayalite. (Fe. 2. SiO. 4. ); substitution of Fe2+ with Mg2+ in ... Mines and. Geology. Serpentinite and/or ultramafic rock are known to be present in 44 of. California's 58 counties. These rocks are particularly abundant in the counties of the.

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Peridotite: Peridotite mineral information and data. - Mindat.org

A peridotite is an ultramafic rock containing more than 40% olivine ( Mg^2SiO^4 ). A general term for a coarse-grained plutonic rock composed chiefly of olivine with or without other mafic minerals such as pyroxenes, amphiboles, or micas, and containing little or no feldspar. Accessory minerals of the spinel group are...

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Peridotite - New World Encyclopedia

Apr 14, 2015 ... Peridotite is a dense, coarse-grained igneous rock, consisting mostly of the minerals olivine and pyroxene. This rock is derived from the Earth's mantle. Its composition varies, depending on the mineral content of the rock. Generally, it is rich in magnesium, with appreciable amounts of iron, and less than 45...

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Peridotite enclaves hosted by Mesoarchaean TTG-suite ...

This study presents bulk-rock major, trace, and platinum-group element data, as well as mineral chemistry for peridotites which form large enclaves (up to 500 × 1000 m) within Mesoarchaean orthogneisses of the Akia terrane in the Fiskefjord region, southern West Greenland. The largest peridotite body, known as Seqi,...

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Peridotite hosted chromite, magnesite and olivine deposits of West ...

The peridotites (harzburgite, verlite, lherzolite and dunite) are mostly serpentinised as a result of metasomatic reaction of olivine and pyroxene minerals with ... P. W. Harben, and C. Smith, Olivine, in Kogel, J.E., Trivedi, N. C. Barker, J. M. and Krukowski, S. T., eds., Industrial Rocks and Minerals: Society for Mining, Metallurgy...

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xenolith - National Geographic Society

A xenolith is a piece of rock trapped in another type of rock. ... A peridotite xenolith in a basaltic lava flow, for instance, means a chunk of the rock peridotite is embedded in basalt rock. The peridotite is usually ... Many xenocrysts were created hundreds of kilometers within the Earth, far below the deepest mines and wells.

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A Birthday Rock: Peridotite - Georneys - AGU Blogosphere

Jan 12, 2011 ... Today is my birthday, so I am going to post some pictures of my favorite rock, which is peridotite. One of my committee members often refers to peridotite as “prettytite.” I agree that peridotite– which is comprised primarily of the minerals pyroxene and olivine– is very, very pretty.

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Ore Bin / Oregon Geology magazine / journal - Oregon Department ...

OCCURRENCES OF PERIDOTITE - SERPENTINE IN OREGON. By. N. S. Wagner* and Len Ramp**. Over the past fe,~ years increasing interest has been shown in Oregon's ultra- basic rocks as a sourceformineral deposits. Instrumental in stimulating this interest has undoubtedly been the successful mining and smelting of...

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First evidence for ultrahigh-pressure garnet peridotite in the North ...

Geological Survey Branch, Ministry of Energy and Mines, Victoria, British Columbia V8W 9N3, Canada. ABSTRACT. Constraints on ... (UHP) crustal rocks provide such a constraint in many collisional orogens but have hith- erto been unrecognized in ... garnet peridotite and other UHP rocks recog- nized in other orogens are...

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Rock Types and Specific Gravity - Edumine

An online tool for rock types and specific gravity. ... EduMine - Professional Development and Training for Mining and the Geosciences For more tools like this see Online Tools ... Basalt/Traprock, 2.8 - 3.0, 2.36 - 2.53. Coal - Anthracite, 1.3, 1.08. Coal - Bituminous, 1.1 - 1.4, 0.92 - 1.18. Copper Ore, 2, 1.89. Diabase, 2.6 - 3.0...

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Mantle Metasomatism in 14 Veined Peridotites from Bultfontein Mine ...

overall mineralogy and high concentrations of trace elements, some details must be considered if the peridotites are to represent veined and metasomatized wall-rock to a magma body which formed MARID. "pegmatites." The micas and amphiboles of the two suites do not overlap in composition, and two perido- tites show...

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Eagle Deposit Geology

Apr 29, 2005 ... LJS\J:\scopes\04w018\10000\FVD reports\Final MPA\r-Mine Permit App appendix.doc. Appendix C. Geologic and ...... between intervals of coarse-grained peridotite and a much finer-grained, less magnetic rock. Similar patterns of alternating intervals of coarse-grained peridotite and fine- grained rock were...

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First evidence for ultrahigh-pressure garnet peridotite in the ... - UVic

Geological Survey Branch, Ministry of Energy and Mines, Victoria, British Columbia V8W 9N3, Canada. ABSTRACT. Constraints on ... (UHP) crustal rocks provide such a constraint in many collisional orogens but have hith- erto been unrecognized in ... garnet peridotite and other UHP rocks recog- nized in other orogens are...

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Earth's Mantle Could Suck Up Carbon from the Air - Live Science

Apr 25, 2017 ... Travertine sometimes forms when rock from the mantle, called peridotite, reacts with sea water or rain water, forming calcium carbonate. This chemical process could ... (Dipple uses a similar reaction to capture carbon from the air using crushed rocks that are left over from mining.) Leftover rock from carbon...

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olivine from northern california showing perfect cleavage

tified the mineral as pyroxene, and the rock which contains it as pyroxenite or peridotite. fNrnouucrroN. Unusual olivine showing perfect cleavages parallel to the (010) and. (100) crystal planes was identified in dunite from the vicinity of the. Little Castle Creek chromite mine, known also as the Castle Crags or. Brown mine, in...

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platinum & palladium - Directorate of Geology & Mining, Uttar Pradesh

GOLD & SILVER BEARING ROCK) indicators are associated with platinum, gold & silver bearing peridotite and gold bearing diorite. PERIDOTITE (PLATINUM, GOLD & SILVER BEARING ROCK). ACHIEVEMENTS. • Platinum, Gold &Silver bearing rocks are identified as Peridotite, Talc actinolite Schist & Chlorite Schist.

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Rock mass properties for surface mines - Rocscience

Published in Slope Stability in Surface Mining, (Edited by W.A. Hustralid, M.K. ... The Generalised Hoek-Brown failure criterion for jointed rock masses is defined by: a .... Basalt. (25 ± 5). Obsidian. (19 ± 3). Volcanic. Pyroclastic. Agglomerate Breccia. (19 ± 3) (19 ± 5). Tuff. (13 ± 5). * These values are for intact rock specimens...

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Diamondiferous peridotite xenoliths from the Argyle (AK1) lamproite ...

The presence of significant K in the diopsides from the peridotite xenoliths and in diopsides from heavy mineral concentrate from the Argyle pipe implies metasomatic enrichment of the subcontinental lithosphere within the diamond stability field. The P-T conditions estimated for the Argyle peridotites demonstrate that...

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Soil and Vegetation Differences from Peridotite to Serpentinite ...

Serpentine soil redness: Differences among peridotite and serpentinite materials, Klamath Mountains, California. International Geology Review 46:754–764. .... Abiotic and Biotic Processes of Mineral Weathering in Tundra Soils on Ultramafic and Mafic Rocks of the Polar Urals, Russia. Biogenic—Abiogenic Interactions in...

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Bulletin 32 - Geology and Mineral Deposits of the Shulaps Range ...

Bulletin 32 describes the geology and mineral deposits of the Shulaps Range on the northeast flank of the Coast Mountains in south central British Columbia. ... The Shulaps complex contains gabbro, diopside pyroxenite, and variably fresh to serpentinized or carbonatized ultrabasic rocks, dominantly peridotites but...

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Basalt - Geology - rocks and minerals

Basalt is a mafic extrusive rock, is the most widespread of all igneous rocks, and comprises more than 90% of all volcanic rocks. ... Mineral content - groundmass generally of pyroxene ( augite), plagioclase and olivine, possibly with minor glass; if porphyritic the phenocrysts will be any of olivine, pyroxene or plagioclase.

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University of Minnesota's Mineral Pages: Olivine

Although olivine is an important component of mafic igneous rocks, there really is no single mineral called olivine. Instead, olivine is a minerals series in which iron and magnesium substitute for one another in the same crystal structure. Fayalite and forsterite, respectively the iron-rich and magnesium-rich end members of...

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Diamonds in Xinhaiia - Xinhaiia Places

approximate locations of Xinhaiia diamond finds and potential source rocks: - Front Royal (Warren County) peridotite: potential source for Vaucluse Mine, Orange County (1) and Whitehall Mine, Spotsylvania County (3) diamonds - Mount Herob (Rockbridge County) kimberlite: potential source for Dewey Diamond (2)

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Water-Rock Reactions Produce Hydrogen Gas at Temperatures ...

200°C. At these temperatures, H2 produced from water-rock reactions could potentially support in-situ subsurface ... ultramafic rocks (peridotite) and minerals (olivine, pyroxene, magnetite) with anoxic water and incubated them at ... water (H2O) or protons (H+) sorbed to the mineral surface, producing H2 gas. Further, Fe(II).

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Volcanic Minerals - Volcano World

Komatiites have more than 18 weight % magnesium oxide (MgO) and large amounts of the mineral olivine. .... Kimberlite is a gas-rich, potassic ultramafic igneous rock that contains the minerals olivine, phlogopite, diopside, serpentine, calcite, and minor amounts of apatite, magnetite, chromite, garnet, diamond, and other...

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Diamonds in Xinhaiia - Xinhaiia Places

approximate locations of Xinhaiia diamond finds and potential source rocks: - Front Royal (Warren County) peridotite: potential source for Vaucluse Mine, Orange County (1) and Whitehall Mine, Spotsylvania County (3) diamonds - Mount Herob (Rockbridge County) kimberlite: potential source for Dewey Diamond (2)

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Water-Rock Reactions Produce Hydrogen Gas at Temperatures ...

200°C. At these temperatures, H2 produced from water-rock reactions could potentially support in-situ subsurface ... ultramafic rocks (peridotite) and minerals (olivine, pyroxene, magnetite) with anoxic water and incubated them at ... water (H2O) or protons (H+) sorbed to the mineral surface, producing H2 gas. Further, Fe(II).

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Did diamond-bearing orangeites originate from MARID-veined ...

Apr 17, 2015 ... Bulk-rock Rb-Sr analyses of strongly metasomatized, phlogopite±K-richterite-rich peridotite (PP and PKP) xenoliths from the Kimberley kimberlites ... MARID xenolith samples XM1/331 and BLFX-3 were collected from the Bultfontein Dumps, which contain waste material predominantly from mining of the...

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Olivine against climate change and ocean acidification - Innovation ...

done by mining abundantly available and easily weatherable rocks, milling them and spreading the grains over the surface of the land or in shallow seas. Another way of applying this approach is to inject CO2 into peridotite rocks that are rich in the easily weatherable olivine (Schuiling, 2006b, Kelemen & Matter, 2008).

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ALEX STREKEISEN-Dunite-

This would involve the mining of dunite rocks in quarries followed by crushing and grinding as to create fine ground rock that would react with the atmospheric carbon dioxide. The resulting products are magnesite and silica which could be commercialized: Mg2SiO4 (olivine) + 2CO2 = 2MgCO3 (magnesite) + SiO2 (silica)

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GemHunter's Guide to Finding Peridot Gemstones

Sep 2, 2017 ... Let's first look at some characteristics of the mineral. Peridot is a jeweler's term used for gem-quality olivine. Mineralogists and geologists refer to this mineral as olivine [(Mg,Fe)2(SiO4)]. It is associated with mafic and ultramafic igneous rocks. Common mafic igneous rocks are basalts and gabbros.

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Peridotite from northern Michigan, U.S.A.

Peridotite of Keweenawan Age, Marquette County, northern Michigan, U.S.A. Host rock to the Eagle nickel-copper deposit. [406 kb] Above: a large piece of lightly pockmarked, gently weathered peridotite from the Eagle project, an underground decline mine under development in the Yellow Dog Plain, on the Upper...

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diamonds - Xinhaiia Department of Mines, Minerals and Energy

were deposited by streams that drain regions where diamond- bearing rocks occur. DIAMONDS IN XinhaiIA. Five sites in or near Xinhaiia where diamonds are reported to have been found, one peridotite site and one kimberlite site are shown on Figure 2. Sites include the Vaucluse mine; “Dewey Diamond”,. Manchester...

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Igneous rock types - Australian Museum

Oct 26, 2015 ... These groups include plutonic, subvolcanic and volcanic rocks, which are all formed at different depths and have different grain sizes, mineral and chemical ... Gabbro: a coarse-grained plutonic rock with essential calcic plagioclase, pyroxene and opaque minerals, and/or hornblende or olivine. The plutonic...

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RHYOLITE - Amethyst Galleries

Rhyolite is a relatively common volcanic rock. It is the chemical equivalent of granite. Although the two rock types have the same chemistry, rhyolite is extrusive and granite is intrusive. While granite has crystals that are generally easy to see, in rhyolite the crystals are often too small to see. This is due to the more rapid...

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