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单词 komatiite
释义

komatiite /kə'mætɪaɪt/

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科马提岩
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  • commutate vt. 变换电流方向;整流
  • legitimate adj. 合情合理的; 合法的
  • hematite n. [矿]赤铁矿
  • committed adj. 忠诚的,坚定的
komatiite n. 科马提岩;科磨致岩

网络短语:
komatiite e 科磨致岩
pyroxenic komatiite 辉岩质科马提岩
Basaltic komatiite 玄武镁绿岩;玄武质科马提岩
英语例句库
  1. Chen Huifang. 1991.Discovery of the old crystalline basement and komatiite on Hainan island.Geotectonica et Metallogenia,15(1) :62.
    [1]陈惠芳.1991.海南岛前寒武纪结晶基底和科马提岩的发现.大地构造与成矿学,15(1):62.
  2. O'Neill says by looking at the water content and oxidation ratio of the komatiite samples they were able to discount the wet-melting theory.
    奥尼尔说,通过观测科马堤岩样品的水含量和氧化速度,他们可以不用注重湿流体理论了。
  3. To date, komatiites with spinifex textures have not been found in the supracrustal rocks, but rock sequences similar to greenstones metamorphosed up to upper amphibolite facies are often observed.
    在龙岗地块与北带之间的接触带上,发育了一条晚太古宙-古元古宙时期的线性活动带。

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中文百科

科马提岩

科马提岩样本,寛度为9cm。
Komatiite lava from the type locality in the Komati Valley, Barberton Mountainland, South Africa, showing the distinctive
Graph of komatiite geochemistry MgO% vs Cr ppm, from basal flows, Wannaway, Western Australia
A2 facies dendritic feathery olivine crystals, drill hole WDD18, Widgiemooltha, Western Australia

科马提岩Komatiite),一种在高温下形成,富含镁的超基性喷出岩。粒状结构,主要由橄榄石和辉石组成,其中橄榄石成分达到40%-50%以上,含有少量的角闪石、黑云母以及铬、铁矿等。橄榄岩含有少于45%的二氧化硅,属于超基性岩石。

火山岩(喷出岩):
浅成岩:
深成岩:

科马提岩,苦榄岩
金伯利岩, 钾镁煌斑岩
橄榄岩

玄武岩
辉绿岩(粗玄岩)
辉长岩

安山岩
闪长玢岩,正长斑岩
闪长岩

英安岩

花岗闪长岩

流纹岩
细晶岩—伟晶岩
花岗岩

英语百科

Komatiite 科马提岩

Komatiite lava from the type locality in the Komati Valley, Barberton Mountainland, South Africa, showing the distinctive
Komatiite sample collected from the Abitibi greenstone belt near Englehart, Ontario, Canada. Specimen is 9 cm wide.  Bladed olivine crystals are visible, though spinifex texture is weak or absent in this sample.
Graph of komatiite geochemistry MgO% vs Cr ppm, from basal flows, Wannaway, Western Australia
A2 facies dendritic feathery olivine crystals, drill hole WDD18, Widgiemooltha, Western Australia

Komatiite /kˈmɑːti.t/ is a type of ultramafic mantle-derived volcanic rock. Komatiites have low silicon, potassium and aluminium, and high to extremely high magnesium content. Komatiite was named for its type locality along the Komati River in South Africa.

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更新时间:2025/6/22 4:21:03