地幔過渡帶 的英文怎麼說

中文拼音 [demànguòdài]
地幔過渡帶 英文
transition zone
  • : 名詞(遮擋用的簾子) curtain; screen
  • : 過Ⅰ動詞[口語] (超越) go beyond the limit; undue; excessiveⅡ名詞(姓氏) a surname
  • : Ⅰ動詞1 (由此岸到彼岸;通過) cross (a river the sea etc ) 2 (渡過) tide over; pull through 3 ...
  • 過渡 : transition; transit
  1. During the yanshanian phrase, the area is in the condition of contractional background, with multi - staged tectonic reversion. 5. through studying the origin of volcanic rocks and the characteristics of magma evolution, it concludes that there exist 3 originated areas of magma - from mantle, crust, and mantle - crust exchange. the basic magma of nandaling volcanic rocks of early jurassic is derived from upper mantle ; the magma of tiaojishan volcanic rocks of mid jurassic is formed in the contractional tectonic setting, and derived from the transition zone of crust and mantle interaction ; the acid magma of l

    5 、通巖石化學、微量元素、稀土元素的研究,探討了不同級別節律的火山巖成因、巖漿演化等特徵,認為本區燕山期火山巖有三個巖漿源區,即源、殼源和殼混源,早侏羅世的南大嶺旋迴的基性巖漿,起源於上;中侏羅世髫髻山旋迴火山巖是在相對擠壓環境中,巖漿起源於殼;晚侏羅世無負eu異常的酸性巖漿來源於下殼的古老結晶基底的局部熔融,有負eu異常的酸性巖漿來源於上殼的局部熔融;早白堊世火山巖基性巖漿起源於上,中性巖漿起源於下殼底部的殼
  2. The comparison of cenozoic basalts and their mantle xenoliths from both sides of the taihangshan gravity lineament reveals that : ( 1 ) cenozoic basalts from western and eastern north china display opposite temporal trends, suggesting lithospheric thinning in western north china during the cenozoic and lithospheric thickening in eastern north china ; ( 2 ) the lithospheric mantle in the west is mostly late - archean to proterozoic in age, whereas that in the east has a modern age with minor proterozoic age ; ( 3 ) the crust mantle transition in the west is considerably thicker than in the east, probably due to different extents of magmatic underplating

    摘要通對比華北太行山重力梯度兩側新生代玄武巖及其中源包體的成分,發現: ( l )華北東、西部新生代玄武巖具有相反的演化趨勢,說明新生代以來西部巖石圈逐漸減薄,而東部巖石圈逐漸加厚; ( 2 )西部巖石圈組成相對復雜,年齡多為晚太古代元古代;而東部巖石圈組成相對單一,年齡多為現代值,少數為元古代; ( 3 )西部殼較厚而東部較薄,反映兩不同的巖漿底侵作用程度。
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