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In addition to the major silicate minerals, peridotite typically contains accessory phases such as sulfides and minor carbonate and hydrous phases (Lorand et al. 2013; Lorand and Luguet 2016). The mantle S content varies spatially but is approximately 250 ppm on average (McDonough and Sun 1995 ) with nearly all of the S present as accessory ...
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C. the extrusive magma cools quickly so the mineral grains do not have time to grow. 1 / 60. 1 / 60. Flashcards; ... Visible quartz and potassium feldspar grains are the main constituents in a _____. ... B. Pumice _____ is composed mainly of ferromagnesian minerals. D. Peridotite. Which of the following minerals crystallize early in Bowen's ...
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Peridotite is an igneous rock, hard and rough, made up mostly of the minerals olivine, pyroxene, and amphibole. It is coarse grained, dark-colored, and ultramafic, which means it has very low …
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Electron microprobe analyses of major- and minor-element oxide components for two glassed samples of natural KLB-1 peridotite are presented. One glass was made with the aid of a phosphate flux, and the second glass was made by laser melting of aerodynamically levitated spheroids resulting in homogeneous silicate glass beads.
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Study with Quizlet and memorize flashcards containing terms like Which of the following rocks is composed mainly of ferromagnesian minerals?, Which rock would be most likely to contain visible quartz and potassium feldspar crystals?, Which term describes the changing of the composition of magma by incorporating surrounding host rock? and more.
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What is Peridotite? Peridotite is a generic name used for coarse-grained, dark-colored, ultramafic igneous rocks. Peridotites usually contain olivine as their primary mineral, frequently with other mafic minerals such as pyroxenes and amphiboles. Their silica content is low compared to other igneous rocks, and they contain very little quartz and feldspar.
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The Zhaheba ophiolite is an ocean relic of the Zhaheba-Aermantai oceanic slab, a branch of the early Paleozoic Paleo-Asian Ocean. The peridotites consist mainly of harzburgite, lherzolite and minor dunite, chromitite. This study describes the whole-rock geochemistry and mineral chemistry of the Zhaheba peridotite and chromitite for the purpose of constraining their …
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The peridotite of the Hayachine ultramafic complex has not been well studied with respect to its rheological properties; ... The major minerals in the peridotites are olivine, orthopyroxene, clinopyroxene, spinel, amphibole, and serpentinite. Basitized orthopyroxene pseudomorphs were common in the samples.
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This review presents a compilation of abyssal peridotite geochemical data (modes, mineral major elements, and clinopyroxene trace elements) for > 1200 samples from 53 localities on 6 major ridge systems. On the basis of composition and petrography, peridotites are classified into one of five lithological groups: (1) residual peridotite, (2 ...
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New all-rock major oxide, trace, and REE data and main mineral oxide data of mantle peridotites, which constitute the lowest level of the ophiolite sequence, are presented. In the light of these data, it was aimed to evaluate the partial melting and metasomatism by examining the rock formation of the mantle peridotites of the ophiolitic rocks ...
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The Horoman peridotite complex in Japan (Fig. 1), one of the Alpine-type peridotite massifs, is characterized by wide exposure and extremely limited serpentinization and, therefore, may provide valuable information regarding the tectonic movement of the uppermost mantle, such as the uplift and/or emplacement of the Alpine-type peridotite massif.
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Study with Quizlet and memorize flashcards containing terms like What is a peridotite? What minerals is it composed of?, If the geotherm is normally well below the beginning of melting temperature of anhydrous mantle peridotite, what three mechanisms cause melting of this peridotite?, Where do each of these mechanisms occur in terms of the plate tectonic …
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Major and trace elements mineral data. The major element compositions of silicate ... D. A. Lithium elemental and isotopic disequilibrium in minerals from peridotite xenoliths from far-east Russia ...
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As a major component of the Earth's mantle, ultramafic rock equilibrates under dry, high-temperature conditions and is thus metastable at the Earth's surface and in the presence of aqueous fluid. ... Primary olivine contains on average ~2880 ± 410 ppm Ni and represents the dominant Ni host mineral in peridotite 43. Analysis of ...
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peridotite « Back to Glossary Index. An intrusive ultramafic rock, which is the main component of the mantle. The minerals in peridotite are typically olivine with some pyroxene. Related Articles: 1 Understanding Science; 2 Plate Tectonics; 3 Minerals; 4 Igneous Processes and Volcanoes;
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Ultramafic-- Peridotite--coarsely crystalline, contains more magnesium and iron-rich minerals especially green olivine, Upper mantle--peridotite. and more. Study with Quizlet and memorize flashcards containing terms like texture of a rock--refers to the sizes, shapes and arrangements of different components.
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The dashed line is the reconstructed whole rock Cl content of BM peridotite calculated from mineral proportions and the in-situ Cl content of the constituent minerals (Urann et al., 2017). MgO and Al 2 O 3 data for BM and BD peridotites and pyroxenites are from ( Wang and Becker, 2015 ; Wang et al., 2013 ).
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Peridotite is the main constituent of which part of the Earth? A) Crust B) Magma chambers C) Rift zones D) Upper mantle. D. ... The _____ mineral on the Bowen's Reaction Series will be the last to melt if an igneous rock is heated, while _____ would be the first. A) Quartz, ...
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Which mineral class makes up most igneous rocks? Silicates. Which of the following minerals is not a ferromagnesian mineral? Potassium Feldspar. Peridotite is the main constituent of which part of the Earth? Upper mantle. Which two minerals define a felsic composition? Quartz and Potassium Feldspar. About us.
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what mineral class makes up most igneous rocks. Silicates. peridotite is the main constituent of which part of the Earth. upper mantle. which two minerals define a felsic composition. Quartz and potassium Feldspar. Silica content of Mafic. 50%. Silica content of Felsic. 70%. About us.
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The Pali peridotite has lower H 2 O contents in its minerals compared to those of SLC with 236 ppm in clinopyroxene, 70 ppm in orthopyroxene, and up to 3 ppm in olivine. Using the modal proportions of minerals, the bulk-rock water contents were calculated to range from 45 to 97 ppm H 2 O.
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A suite of peridotite xenoliths were collected from lahar flow deposits located close to the summit of Mt. Pinatubo. Spinel harzburgite is the most dominant lithology among dunites, pyroxenites and websterites. A rare spinel lherzolite xenolith (P12-7) is also present in this suite. The spinel lherzolite has well-preserved protogranular texture with very minimal presence of …
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The water contents of peridotite xenoliths can provide information about the amount and distribution of water in the lithospheric mantle. The main minerals of peridotite xenoliths (olivine, spinel, pyroxenes) are known as the nominally anhydrous minerals (NAMs), which have no hydrogen in their stoichiometric chemical formulas.
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Peridotite is an ultramafic plutonic rock containing 40– olivine (from peridot, French for olivine); other essential minerals include clinopyroxene and orthopyroxene; common accessory minerals are hornblende, mica, spinel, garnet, feldspar, ilmenite, and sulfides.Varieties are defined by the presence of phases in addition to olivine; wehrlite is olivine + clinopyroxene; harzburgite …
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Peridotites usually contain olivine as their primary mineral, frequently with other mafic minerals such as pyroxenes and amphiboles. Their silica content is low compared to other igneous …
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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 the lower parts of tabular-layered igneous complexes or masses; (2 ...
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The main minerals of peridotite xenoliths (e.g., olivine, clinopyroxene, orthopyroxene and garnet) are known as the "nominally anhydrous minerals" (NAMs), which do not contain hydrogen based on ideal chemical formula but sometimes exist in the crystal lattice as point defects. Although the absolute value of water contents is low, they could ...
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This review presents a compilation of abyssal peridotite geochemical data (modes, mineral major elements, and clinopyroxene trace elements) for >1200 samples from 53 localities on 6 major ridge ...
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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.
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Peridotite is a coarse-grained, dark-colored intrusive igneous rock, which consists of minerals such as pyroxene and olivine. It usually contains olivine as the primary mineral in addition to other mafic minerals, such as amphiboles and …
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Here, we report the mineral chemistry, whole rock major element and 187 Os/ 188 Os isotopic composition of peridotite xenoliths from two Neogene locations in Southern Victoria Land. We show that the peridotite suites represent a compositionally heterogeneous lithospheric mantle that was depleted during a middle Proterozoic lithosphere-forming event for which there …
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Olivine (Mg 2 SiO 4) reacts with CO 2-bearing aqueous fluids almost as fast as wollastonite (Palandri and Kharaka, 2004; National Academies of Sciences Engineering Medicine, 2019).Additionally, as the major mineral of …
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Download Table | Major hydrous minerals in the peridotite mantle from publication: Water transport into the deep mantle and formation of a hydrous transition zone | The phase relations in the ...
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Calcite is the main mineral of crystalline crusts where it forms aggregates of euhedral to subhedral {104} crystals (10 ... the chemistry of Ronda Mg–HCO 3 river waters is most likely due to hydrolysis of ferromagnesian peridotite minerals by infiltrated meteoric waters and shallow groundwater that are in equilibrium with the atmosphere.
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Minor minerals and mineral groups in peridotite include plagioclase, spinel (commonly the mineral chromite), garnet (especially the mineral pyrope), amphibole, and phlogopite.
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Sometimes, peridotite rocks from the mantle get caught up in rising masses of magma. When erupted from volcanoes at the surface, the lava flows will have mantle peridotite xenoliths. There are seven principal varieties of peridotite, based on different percentages of the three main minerals: olivine, clinopyroxene, and orthopyroxene.
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