Information om | Engelska ordet PERIDOTITE

Exempel på hur man kan använda PERIDOTITE i en mening

• Peridot can be found in mafic and ultramafic rocks occurring in lava and peridotite xenoliths of the mantle.
• Kimberlite, an igneous rock and a rare variant of peridotite, is most commonly known to be the main host matrix for diamonds.
• - An ultramafic plutonic or cumulate rock, a type of peridotite, composed of olivine and clinopyroxene.
• He published theories on sea floor spreading, specifically on relationships between island arcs, seafloor gravity anomalies, and serpentinized peridotite, suggesting that the convection in the Earth's mantle is the driving force behind this process.
• The compositions of peridotite nodules found in certain basalts are of special interest along with diamond pipes (kimberlite), because they provide samples of Earth's mantle brought up from depths ranging from about 30 km to 200 km or more.
• Diopside is found in ultramafic (kimberlite and peridotite) igneous rocks, and diopside-rich augite is common in mafic rocks, such as olivine basalt and andesite.
• The upper mantle is dominantly peridotite, composed primarily of variable proportions of the minerals olivine, clinopyroxene, orthopyroxene, and an aluminous phase.
• Magma generation occurs via flux melting, where the dehydration of hydrous minerals in subducted oceanic crust inputs water into and lowers the melting temperature of the peridotite mantle wedge above the subducted slab.
• The magmas of Bridgeman Island may have formed through the incomplete melting of spinel peridotite, with 10–20% of the resulting melt ending up as the magma.
• The origin of most pyrope is in ultramafic rocks, typically peridotite from the Earth's mantle: these mantle-derived peridotites can be attributed both to igneous and metamorphic processes.
• The molten material is forced to the surface in volcanic pipes, bringing with it xenoliths and diamonds from the harzburgitic peridotite or eclogite mantle regions where diamond formation is stabilized.
• The islets expose serpentinized abyssal mantle peridotite and kaersutite-bearing ultramafic mylonite atop the world's highest and yet only second largest megamullion (after the Parece Vela megamullion under Okinotorishima in the Pacific Ocean).
• Igneous and metamorphic rocks dominate the rocks formation and with composition that includes basalt, gabbro, ultrabasic, volcanic breccia, greywackes, peridotite, andesitic lava, metamorphosed shale, quarts, feldspar, slate, amphibolite, and phyllite.
• The most distinctive feature is the ultrabasic ophiolite peridotite and gabbro on Unst and Fetlar, which are remnants of the Iapetus Ocean floor.
• Hellyerite forms in this environment in nickel rich serpentinites, which are metamorphosed equivalents of ultramafic cumulate rocks such as peridotite and dunite.
• One of the rocks (peridotite) is rich in magnesium and iron, and changed through heat and pressure to serpentinite as it pushed upwards from the Moho, the boundary of the Earth's crust and mantle.
• Remains of this activity is the whole array of igneous rocks found in central Serbia: andesite, dacite, trachyte, rhyolite, peridotite, granite, gabbro, pegmatite, basalt, diabase, etc.
• Most boninite magma is formed by second stage melting in forearcs via hydration of previously depleted mantle within the mantle wedge above a subducted slab, causing further melting of the already depleted peridotite.
• Pre-deformation they would have been a combination of undepleted mantle in the form of lherzolite, peridotite and depleted harzburgite mantle from which.
• Harzburgite, an ultramafic, igneous rock, is a variety of peridotite consisting mostly of the two minerals olivine and low-calcium (Ca) pyroxene (enstatite); it is named for occurrences in the Harz Mountains of Germany.

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