俯沖極性 的英文怎麼說
中文拼音 [fǔchōngjíxìng]
俯沖極性
英文
polarity of subduction-
The mantle source for the mesozoic mafic volcanic rocks in yanshan area exhibit transition character in space and time : the mantle source components vary from subduction - related metasomatic components and emi components through dominant emi components and slight subduction - related metasomatic components to emi components ; spatially, mantle source of the volcanic rocks show a regular variation trend from an enriched lithospheric mantle with emi - like signatures in the western shandong province through emi and / or subduction - related metasomatic components in yanshan area to subduction - related metasomatic lithospheric mantle in the hinggan - mongolian orogen
燕山地區中酸性火山巖則來源於地殼,與玄武質巖漿底侵作用關系密切。 3燕山地區火山巖源區組分在時空上具有一定的演化規律:在時間上,從早期俯沖交代地幔及emi的參與,經中期以emi佔主導及極少量俯沖交代組分的階段,演變到晚期以emi為主,可能有少量軟流圈貢獻的組分,再到晚白堊世以軟流圈為主。
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