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This thesis studies the volcanic tectono-petrofacies, petrology, mineralogy, geochemistry, isotopic chronology, stratum and high-precision SHRIMP zircon U-Pb datings of the Mt.Yandangshan volcano-intrusive complex, and concludes that: Yandangshan volcanic rock units belong to high-K calc-alkaline acid rock associations, mainly ryholitic and trachytic dacitic in composition. They have A/CNK values of 0.9-1.2 (i.e., aluminium saturation and supersaturation), enriched LREE and LILEs and depleted HFSE. Their 8Eu values are 0.11-0.32, indicating a evident fractional evolution of plagioclase crystallization. Their ∑REE varied very limitedly,(87~Sr/(86)Sri ratios and eNd values are 0.7086~0.7095 and -10.20~-9.96 for volcanic rocks, and 0.7087~0.7095 and -7.6~6.92 for the central intrusive facies syenite, which means that all the igneous rocks from Mt. Yandangshan are evolutional products of magmas with the same source, and that they derived mainly from crust, but mixed with mantle components.
本文从火山构造岩相学、岩石学、矿物学、地球化学、同位素年代学、地层学等方面出发,同时结合高精度SHRIMP锆石U-Pb定年,对雁荡山火山岩进行了系统的研究,确定雁荡山火山岩为一套以流纹质和粗面英安质为主体的高钾钙碱性酸性岩石组合,A/CNK值集中在0.9~1.2之间,为铝饱和或铝过饱和类型;富轻稀土元素和大阳离子亲石元素、相对亏损高场强元素:负铕异常明显,δEu值为0.11~0.32,表明岩浆经历了以斜长石为主的强烈结晶分异作用:岩石样品的∑REE变化有限,火山岩样品的~(87Sr/~(86)Sr_i为0.7086~0.7095,εNd为-10.20~-9.96,中央侵入体石英正长岩~(87Sr/~(86)Sr_i为0.7087~0.7095,εNd为-7.6~-6.92,表明它们是同源岩浆分异演化的产物,物质来源主要为陆壳,但有地幔物质参与。
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C-peptide and insulin/glucagon ratios of patients decreased significantly,which suggested that both a and βcell functions ofpancreas have damage, and that damagement of βcell were more severe.
细胞及β细胞功能受损害,且以β细胞功能受损明显;胰岛素/胰高血糖素比值下降提示慢性呼吸衰竭患者以分解代谢占优势。
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In this paper, we propose the investigation of the void in dual damascene process and the hole and trench with large aspect ratios between width and height.
本论文主要针对双层镶嵌制程所造成的孔隙及具有高深宽比的极窄和极深的通孔和沟槽所造成的影响加以探讨及研究。
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The results show that the zircons of the samples in deformative granite and massive granite of the Jiaoziding granites have internal oscillatory zoning; zircons of the Jiaoziding granites have higher Th/U ratios(0.521.23, 0.321.16)and are igneous in origin.
研究结果表明,轿子顶花岗岩体中变形花岗岩和块状花岗岩中锆石均发育岩浆韵律环带结构,具有较高的Th/U比值(052~123、032~116),为岩浆成因锆石。
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The levels of heavy metals under 5 cm in depth were contributed to natural depositation. The index of ICV and other elements' ratios were calculated as well.
同时,发现最表层的Hg、Se、Cd含量有降低趋势,很可能是新奥尔松煤矿的关闭导致煤灰沉积的减少。
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The two rate equations fitted the experimental data well,as was confirmed by the reaction of bis(4-carboxyphenyl)phenyl phosphine oxide with ethylene glycol under constant reaction temperatures of 180197℃ and at different ratios of diol to diacid,whose rate constant and activation energy were calculated.
将这两个速率方程应用于双苯基氧化膦与乙二醇的恒温自催化聚酯化反应,计算值与实验数据相一致,并计算得到了该反应的速率常数和活化能。
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Factors of esterfication of mixed dibasic acid were studied: alcohol acid mol ratios, the content of the catalysts, the reaction time and the content of water carrier.
实验考察了混合二元酸酯化的影响因素:醇酸摩尔比、催化剂用量、反应时间以及带水剂的种类和用量对酯化率的影响。
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Odds ratios were pooled for dichotomous outcomes, with all-cause mortality as the primary end point.
优势比对二分式结果进行混合,以全因死亡率为主要终点。
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The results show that the influences of duration and amplitude of stress wave on spallation process of rock under stress wave loading are important; and stress wave with different waveforms is characteristic of different stress values and different stress loading ratios during the same period of time, which brings about the comprehensive effect when difform stress wave is loaded to medium.
通过对不同应力波延续时间、不同应力波峰值和不同应力波波形下应力波诱发层裂过程的数值分析,对应力波反射诱发层裂的规律和机制进行探讨。
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Single-component samarium diiodide catalyst system was first used with polymerization of acrylonitrile. Adding of hexamethylphosphoramide could greatly improve reaction activity of the catalyst system. AN/Sm12 and l{IVIPA1 Sm12 molar ratios, reaction time and temperature were mainly investigated with yields and molecular weights of resultant PAN.
研究发现HMPA的加入可以极大地提高催化活性;考察了单体与催化剂(SmI2)的摩尔比例、第二组分与催化剂(SmI2)的摩尔比例、反应温度、反应时间等因素对相应聚合物的产率和分子量的影响,通过对聚合物的红外和核磁的分析,提出了&单电子转移-双阴离子引发&机理。
- 推荐网络例句
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And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.
47:5 法老对约瑟说,你父亲和你弟兄们到你这里来了。
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Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.
提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法,同时,采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。
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Hey Big Raven, The individual lies dont matter anymore - its ALL a tissue of lies in support of...
嘿大乌鸦,个别谎言的事不要再-其所有的组织的谎言,在支持。