Gabbro is a coarse-grained igneous rock that is relatively low in silica and rich in iron, magnesium, and calcium. Such rock is described as mafic. Gabbro is composed of pyroxene (mostly clinopyroxene) and calcium-rich plagioclase, with minor amounts of hornblende, olivine, orthopyroxene and accessory minerals. [4]

What is Gabbro? 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. It is the most abundant rock in the deep oceanic crust. Gabbro has …

2023年9月4日 · 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.

辉长岩为灰 黑色，结构为中粒至粗粒，伴生的 矿物 有 铁 、 钛 、 铜 、 镍 、 磷 等。 輝長岩之 英文 為Gabbro（國際音標 拼音： /ˈɡæbrəʊ/）。

辉长岩英文名gabbro一词1768年由T.托泽蒂用来称呼异剥石质 蛇纹石 、及一部分命名的辉长岩。 辉长岩为来源于深部地壳或上 地幔 的玄武质 岩浆 经侵入作用形成，广泛分布于地壳的各种构造环境和月球上。 月球上产出的辉长岩以贫 硅 、 碱，富钙、钛为特征，并含有 陨硫铁 、自然金属 铁 等 宇宙矿物。 [1] 辉长岩是基性 侵入岩 分布最广的一种岩石，其化学成分特点是：SiO2 含量45%～52%，K2O+Na2O平均为3.6%±； 铁镁矿物 含量40%～90%。 主要矿物 成分为基性 …

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 variable.

Gabbro is an intrusive igneous rock composed primarily of plagioclase feldspar and large amounts of mafic minerals like pyroxene. It has a phaneritic texture, meaning its interlocking crystals can be seen with the naked eye. It is usually dark gray, black, or …

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.

2023年7月21日 · Usually, gabbro is a tough, massive, or layered dark gray, dark green, or black rock with a coarse-grained texture. It has equigranular hypidiomorphic grains with a somewhat speckled appearance characterized by mostly darker …

2016年1月1日 · Gabbro is a medium- to coarse-grained, mafic intrusive igneous rock, mostly grayish to greenish in color, and is the most abundant rock in the oceanic crust. Oceanic gabbros are mainly composed of three minerals: olivine, plagioclase, and clinopyroxene, sometimes associated with orthopyroxene, amphibole, and Fe-Ti oxides.