| 单词 | magma |
| 释义 | magma noun[U] uk/ˈmæɡ.mə/us/ˈmæɡ.mə/hotliquidrockfoundjust below thesurfaceof theearth 岩浆Geology: types of rock
You can also find related words, phrases, and synonyms in the topics: Geology: earthquakes & volcanic eruptions
magma| American Dictionarymagma noun[U] us/ˈmæɡ·mə/earth science meltedrockunder thesurfaceof theearth Examplesofmagmamagma This characteristic also inhibits development of pronounced vertical zonation of themagmabody. From theCambridge English Corpus Crustally-contaminated andesites could be produced by combined assimilation and fractional crystallization of basaltic magmas. From theCambridge English Corpus Second, differentiation, mixing, assimilation of magmas and alteration can produce compositional trends that can cross field boundaries within discrimination diagrams. From theCambridge English Corpus These constituents are formed rapidly from cooled droplets ofmagmathat take on dynamic shape during transport. From theCambridge English Corpus Even if such amagmachamber extended through the entire crust, its height/diameter ratio would still be less than one. From theCambridge English Corpus It is therefore likely that generation of the widespread intermediate-silicic magmas represents an early stage in the formation of continental crust. From theCambridge English Corpus Constraints on melting andmagmaproduction in the crust. From theCambridge English Corpus The rise of felsicmagmato a high level in the crust without degassing or neutralization of the melt volatile phase suggests deep faulting. From theCambridge English Corpus In particular, the heat for the melting may have been supplied by mafic mantle-derived magmas. From theCambridge English Corpus The role of mantle plumes, particularly in the generation of flood basaltic magmas, has been emphasized by many authors. From theCambridge English Corpus With all these processes, interactions between mantle-derived and crustal-derived magmas control the nature of magmatism in the complex. From theCambridge English Corpus However, the geochemical data are consistent with derivation of magmas from a mantle source modified by subduction processes. From theCambridge English Corpus The mafic magmas were probably derived from the upper mantle (spinel stability field) by 9 % partial melting. From theCambridge English Corpus The magmas are of transitional (mildly alkalic) type, generated by relatively small-fraction (6-7 %) melting of a depleted mantle source. From theCambridge English Corpus The evidence, including that of xenoliths carried in the magmas, supports the idea of melting of old metasomatized lithospheric mantle, usually associated with rifting tectonics. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. CollocationswithmagmamagmaThese are words often used in combination withmagma. Click on a collocation to see more examples of it. basaltic magma The fluid dynamics of a basaltic magma chamber replenished by influx of hot, dense, ultrabasic magma. From theCambridge English Corpus hot magma Under the mountains, there is a very large, veryhotmagmachamber which leads to the originating of glacier caves. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.magma chamber Instead, it promotes quasi-equilibrium crystallization in small domains within a large heterogeneousmagmachamber. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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