火山旋迴 的英文怎麼說
中文拼音 [huǒshānxuánhuí]
火山旋迴
英文
cycle of volcano-
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 、通過巖石化學、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，即地幔源、地殼源和殼幔混源，早侏羅世的南大嶺旋迴的基性巖漿，起源於上地幔；中侏羅世髫髻山旋迴火山巖是在相對擠壓環境中，巖漿起源於殼幔過渡帶；晚侏羅世無負eu異常的酸性巖漿來源於下地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地殼的局部熔融；早白堊世火山巖基性巖漿起源於上地幔，中性巖漿起源於下地殼底部的殼幔過渡帶。According to the characteristics of lithology and lithofacies, the principle that lithostratic unit group is related to volcano cycle or sedimentary cycle, jiangnan region can be divided into two groups, wuyi region can be divided into three groups, nanling region can be divided into four groups
根據巖性巖相特徵，結合巖石地層單位群與火山旋迴或沉積旋迴相對應的原則，將江南區劃分為兩個群，武夷區劃分為三個群，南嶺區劃分為四個群。On the basis of study on petrology, volcanic geology, geochemistry, isotopic chronology, antitheses of the regional strata and 4 suits of volcanic rock stratum of the yanshan - liaoning area, the rhythm of yanshanian volcanic activity is divided into 1 gigantic - cycle, 4 cycles, 11 micro - cycles, 24 sub - cycles and many rhythms. in addition, the temporal and spatial evolution and regional contrast of every - level rhythms are discussed. 3. based on the study on classifications of rhythm of volcanic activity and regional contrast, the petrology, mineralogy, geochemistry, and isotopic characteristics of every - level rhythms are discussed
2 、通過對燕遼地區燕山期發育的四套火山巖的巖石學、火山地質學、地球化學、同位素年代學的綜合研究，通過運用綜合方法進行區域地層對比和分析火山噴發盆地火山巖地層特徵的基礎上，將本區燕山期火山活動節律，劃分為1個二級節律（大旋迴） 、 4個三級節律（旋迴） 、 11個亞三級節律（小旋迴） 、 24個四級節律（亞旋迴）和多個五級節律（韻律）等，論述了各級火山活動節律特徵及其時空演化和區域對比。
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