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gabbro    音标拼音: [g'æbro]
辉长岩

辉长岩

gabbro
n 1: one of a family of granular intrusive rocks


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  • Gabbro - Wikipedia
    Gabbro specimen from Duluth, Minnesota Photomicrograph of a thin section of gabbro Gabbro ( ˈɡæbroʊ GAB-roh) is a phaneritic (coarse-grained), mafic (magnesium- and iron-rich), intrusive igneous rock formed from the slow cooling magma into a holocrystalline mass deep beneath the Earth 's surface Slow-cooling, coarse-grained gabbro has the same chemical composition and mineralogy as
  • Gabbro | Properties, Formation, Composition, Uses
    Gabbro is a type of intrusive igneous rock that is coarse-grained and dark-colored, typically composed of calcium-rich plagioclase feldspar, pyroxene, and sometimes olivine It is similar in composition to basalt, which is its extrusive equivalent Gabbro is typically found in plutonic bodies, such as batholiths and dikes, and is often associated with other mafic and ultramafic rocks
  • Gabbro: Igneous Rock - Pictures, Definition More
    Gabbro is a coarse-grained, dark-colored, intrusive igneous rock It is usually black or dark green in color and composed mainly of the minerals plagioclase and augite
  • Gabbro: Composition, Types, Properties, Uses - Geology In
    Gabbro is a coarse-grained, dark-colored intrusive igneous rock that forms from the slow cooling and crystallization of mafic magma beneath the Earth's surface It is composed primarily of calcium-rich plagioclase feldspar and pyroxene minerals (such as augite), with smaller amounts of olivine and amphibole Gabbro is the intrusive equivalent of basalt, which is its extrusive counterpart
  • Gabbro | Igneous Rock, Mafic Minerals Plutonic Intrusions - Britannica
    Gabbro, any of several medium- or coarse-grained rocks that consist primarily of plagioclase feldspar and pyroxene Essentially, gabbro is the intrusive (plutonic) equivalent of basalt, but whereas basalt is often remarkably homogeneous in mineralogy and composition, gabbros are exceedingly
  • Gabbro: The Intriguing Coarse-Grained Igneous Rock . . . - Rock Seeker
    Gabbro is a dense, coarse-grained igneous rock that forms deep beneath the Earth’s surface as slow-cooling magma solidifies It shares the same composition as basalt but cools slowly enough for its minerals to grow large and become visible to the naked eye
  • Gabbro: A Coarse-grained, Dark-Colored Plutonic Rock
    Gabbro is a dense, coarse-grained, dark-colored, mostly plutonic rock Its essential minerals are calcic plagioclase and pyroxene, but it may have minor amounts of amphibole, olivine, and other minerals
  • Gabbro - Geology is the Way
    Gabbro is a plutonic igneous rock and the intrusive counterpart of basalt The name ‘gabbro’ derives from the Italian town of Gabbro (Rosignano Marittimo, Tuscany) and was first coined by the Italian geologist Tozzetti in 1768 Tozzetti used the term to refer to a suite of ophiolitic rocks Only in 1809, the German geologist Christian Leopold von Buch, restricted the use of this term to
  • Gabbro - ALEX STREKEISEN
    Gabbro is an essential part of the oceanic crust, and can be found in many ophiolite Long belts of gabbroic intrusions are typically formed at proto-rift zones and around ancient rift zone margins, intruding into the rift flanks Gabbro with large augite phenocrysts embedded in white plagioclase These two are the principal minerals in this rock
  • Granite Vs Gabbro: Similarities and Differences - Geology In
    Gabbro often contains valuable amounts of chromium, nickel, cobalt, gold, silver, platinum, and copper sulfides Ocellar (orbicular) varieties of gabbro can be used as ornamental facing stones, paving stones and it is also known by the trade name of 'black granite', which is a popular type of graveyard headstone used in funerary rites





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