isotopic evolution 中文意思是什麼
isotopic evolution
解釋
同位素演化-
Thus, the paper focuses on mineralogy, petrology, petrogeochemistry, isotopic chorology, and sr - nd - pb isotopes of the mafic intrusions and dikes in fujian province, se china. in addition, we also discussed the process of the plate subduction, mantle evolution, crust - mantle interaction, lithospheric thinning and extension, and the reaction for crustal extensi on in fujian province, se china. ( 1 ) daiqianshan mafic intrusion is situated along the changle - nanao fault, which intruded in the metamorphic rocks
基於此，本文以中國東南部福建省的基性脈巖、巖體為研究對象，運用系統的礦物學、巖石學、巖石地球化學、同位素地球化學及同位素年代學證據，詳細論述了晚中生代中國東南部板塊俯沖、地幔演化、殼幔相互作用及巖石圈伸展減薄的地球動力學過程，探討了地殼拉張期次在福建省區域構造上的響應。 -
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。 -
Samples for strontium isotopic screened were selected by way of the test of cathodoluminescence, observation of thin sections, and analysis of sr and mn. the mn / sr value of all samples presented in this paper are less than 2, and the cathodoluminescence is dull, however, the samples from the cambrian underwent diagenetic alteration to a certain degree, and the plotted points of the thickness and 87sr / 86sr value are somewhat discrete. the strontium isotope evolution curve drawn from the data with relatively low 87sr / 86sr value are consistent with other curves based on samples from different areas of the world, supporting the notion of global consistency of strontium isotope composition of marine carbonates
根據鋸同位素地層學的基本原理，利用已有的鋸同位素演化曲線，筆者確定重慶秀山寒武系剖面寒武系底界、下一中寒武統界線和中一上寒武統界線都應適當下移；另外嘗試確定了重慶秀山寒武紀剖面一些關鍵點的年齡，累積厚度1380m處的年齡為503 ? 509ma ，累積厚度1900m處的年齡約為500ma ，這對秀山寒武系剖面下、中寒武統和中、上寒武統界線的確定具有參考價值。 -
The fluid, in the jurassic system with natural gas pools, has the similar chemistry and isotopic component, and possesses the same evolution trend, indicate that it probably originates from the upper tr iassic series and mix with the infiltrating fluid inside the jurassic system
有氣藏的侏羅系流體與上三疊統流體的水化學特徵和同位素組成相近，且具有同一演化趨勢，表明它可能來源於上三疊統流體，並與侏羅系內的滲流水發生過混合作用。 -
On the basis of detailed and systematic studies on the petrography, major and trace elements and sr - nd isotopic data of mesozoic volcanic rocks, especially the mafic volcanic rocks in yanshan area, we successfully studied the deep processes related to magma generation and their relationship with shallow - level tectonic evolution. the major conclusions are summarized as below. 1
論文通過對燕山地區中生代火山巖，特別是中基性火山巖，進行詳細而系統的巖石學、主微量元素地球化學特徵和sr - nd同位素組成特徵的研究，主要取得了以下研究成果： 1燕山地區中生代（ j - k ）火山巖為一套鈣堿性-高鉀鈣堿性-橄欖安粗巖系列巖石。
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