查询词典 isotopes

Neoproterozoic Baoxing Complex in middle to lower metamorphic grade, located in western margin of Yangtze Craton, consists mainly of metamorphic gabbroic, dioritic gneisses, tonalitic and granodioritic gneisses, and massive monzogranites The studies of petrochemistry and SmNd isotopes of Baoxing Complex reveal that the gabbroic and dioritic magmas came from a congenetic magma derived from the partial melting of spinel lherzolites in depletive mantle, and that the magma was intensively contaminated by crustal materials during its emplacement The tonalitic and granodioritic magma were derived from the partial melting of metamorphic basalts in the lower crust And the monzogranitic magma was formed from partial melting of metagreywacks Integrating the lithological association, their trace elements, SmNd isotopic characteristics and petrogenesis, the Baoxing Complex must likely have been emplaced in an island arc tectonic background at the Neoproterozoic active continental margin of Yangtze Craton

位于扬子克拉通西缘的新元古代宝兴杂岩主要由中低级变质的辉长质片麻岩、闪长质片麻岩、英云闪长质到花岗闪长质片麻岩和块状二长花岗岩组成。岩石地球化学和SmNd同位素特征表明，辉长质片麻岩和闪长质片麻岩为同源岩浆演化序列，原始岩浆起源于亏损地幔尖晶石橄榄岩的部分熔融，在上升和侵位过程中受到了地壳岩石强烈混染。英云闪长质和花岗闪长质岩浆形成于下地壳玄武质岩石部分熔融，而二长花岗质岩浆形成于杂砂岩的部分熔融。综合分析宝兴杂岩的岩石组合、微量元素和同位素特征，该杂岩体最有可能形成于新元古代活动大陆边缘火山弧构造背景，并可能经历了碰撞过程。

It is concluded that the variation of S,C,O isotopes and clay minerals is correlatable with the change of sedimentary environment,and that the sedimentary environment of Qianjiang Formation in Qianjiang Depression is an obstructed saline lake of inner land.

封闭盐湖中原生碳酸盐岩和粘土矿物的形成与湖泊水体的化学性质密切相关，从湖泊的低水位到高水位水体化学性质在一定范围内依次变化。

This ratio of isotopes transfers to rainwater. When Coryphodon drank, the oxygen atoms became incorporated into its tooth enamel.

这种同位素的比例会带进雨水中，当冠齿兽饮水时，氧原子会融入牙齿的珐琅质。

Cosmogenic isotopes 〓Be was used to date the glacial geomorphic surface of Qinghai-Xizang Plateau in this paper.

本文应用宇生核素〓Be对青藏高原冰川地貌面的年代进行计算。

This technique for surface dating is ripe now and often be used, especially cosmogenic isotopes 〓Be and 〓Al being used to dating.

该测年技术已经成熟，特别是利用宇生核素〓Be、〓Al对年代的计算，该测年技术在国外的应用已相当普遍。

It takes advantage of radioactive isotopes of ionization ionizing air to generate ion, and electriferous in the neptuni static electricity.

它诳骗发射性同位荤的电离功用电离氛围天生离子，来洋和带电体上的静电。

Because new mantle inputs have not been identified in terms of zircon Hf isotopes, mantle-derived magmas might not have been involved in formation of this S-type granitoid belt.

因为缺少显著幔源特征的高εHf值锆石，本文认为地幔物质基本没有参与该S型花岗岩带的形成。

Now, Sr isotopes can be used not only to constrain the origin and evolution of magma and hydrothermal ore-forming solutions, calculate the scale and degree of lithogenesis and ascertain the relations between fluids and rocks, but also to study sea-level fluctuation, plate movement, ocean-floor spreading and lithogenic evolution.

现在，锶同位素不仅在示踪岩浆及成矿热液的来源和演化、计算晚期成岩改造作用的规模和程度及流体/岩石比等方面已趋于成熟，并且越来越广泛运用于海平面变化、板块活动、海底扩张、成岩演化等方面的研究。

Their geochemical characteri stics of trace elements and Nd and Sr isotopes show that these mafic rock s erupt ed in a back-arc basin.

达拉布特蛇绿岩带的镁铁质岩属亚碱性和碱性系列，可能是弧后盆地火山活动的产物。

Relationship between Mesozoic granites and mesothermal gold mineralization in Xiaoqinling area has been studied by the typomorphic peculiarities of fluid inclusions and Sr, O and H isotopes of the main types of rocks.

对小秦岭地区与金矿化有关的主要地质体中流体包裹体叠加组合标型特征和有关地质体Sr、H、O同位素组成的标型性研究证明，小秦岭地区中生代中温热液金矿化流体与中生代花岗岩浆分界出的热液之间没有直接联系，成矿流体更可能是一种演化的大气降水。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。