查询词典 isotopes

This paper deals with and summarizes the research and importance of ductile shear zones and presents the future direction and aim for the research of the ductile shear zones around the world. Four aspects of studies of the ductile shear zones have been proposed in this paper as follows:(1) The stress environment including the mineral assemblages, deformation, stress-shearing parameters;(2) The major element sequence and activation under condition of stress;(3) The variations of trace elements and REE, their transportation distributions under strong natural deformation as well as variations of mineral crystal parameters, which can also control the element changes during the ductile deformation;(4) The relationship between element migrations, activation and stress, which will present the new evidences for the studies of dynamic diagenesis and mineralization as well as the studies of evolution of ductile shear zones developed in middle and low levels.(5) The analysis of elements and isotopes in mylonites on the micro-scale are crucial for the understanding of component migrations during the mylonization.

对韧性剪切带及其变形岩石的研究现状和研究意义进行系统的综述，提出了未来韧性剪切带及其糜棱岩的研究方向和目标：①系统研究糜棱岩中主要造岩矿物组合及其变形特征，计算剪切变形岩石的应力－应变参数，搞清韧性剪切带所处的应力应变环境；②系统研究韧性剪切带岩石在天然分强剪切应力作用条件下常量元素迁移机制及活化转移的应力排序问题；③系统研究剪切变形作用过程中岩石化学组成的微量和稀土元素变化，讨论强变形条件下岩石中微量元素活化和迁移规律，深入探讨微量元素迁移的动力控制，包括稀土元素配分变化的应力制约以及应变矿物晶格化学变化行为及其对其寄主的变形岩石元素在应变过程中迁移变化的制约和影响；④从理论上探讨天然强剪切应变条件下岩石中组分活化、转移与应力的因果联系，为深入探讨韧性剪切带动力成岩作用提供理论的科学依据，为探讨中、下地壳中韧性剪切带的形成和演化提供科学依据，同时为韧性剪切变形作用条件下成岩、成矿地球化学作用提供理论和实验依据；⑤现代分析技术如激光同位素原位分析以及激光ICP-MASS分析技术对研究变形域内的岩石的元素和同位素的活化迁移规律，对深刻揭示糜棱岩化过程中的元素活化迁移机制提供更高质量的地球化学证据具有重要的作用。

By studying the inorganic CO〓 and helium isotopes in Yinggehai Basin, and investigating the Tertiary lithology and geothermal condition, combined with the results of thermal simulation test, it was suggested that inorganic CO〓 gas principally came from thermal decomposition of Tertiary calcareous shales and Pre-Tertiary carbonate under the burial depth of 6000m, approximately at a strata temperature of about 250℃.

通过系统地剖析莺歌海底辟带气田无机CO〓的碳、稀有气体同位素特征与第三系及古生界基底的岩性及热源条件，结合热模拟实验资料，认为无机CO〓主要来深埋的梅山-三亚组钙质泥岩热分解和前第三系基底碳酸岩的热变质，这种钙质泥岩和碳酸岩热分解产生CO〓的初始温度大约为250℃，相当于埋深约6000m。

He won a1943Nobel prize for developing the use of isotopes as tracers to investigate chemical processes.

他因发展了关于同位素用作调查化学过程的示踪技术的应用而获得1943年诺贝尔奖

Ore source bed ; stable isotopes ; reworked type gold deposit ; Henan

矿源层；稳定同位素；改造型金矿床；河南

The origin of ore-forming matelials is investigated from field survey and analyses of trace elements and isotopes.

通过野外观察和矿石中微量元素、同位素的分析，探讨了矿床的成矿物质来源。

Among the Stardust particles, the investigators found that the ratio of oxygen isotopes was similar to that found in meteorites formed in the inner solar system.

调查人员发现在星尘样品中氧同位素的比例与形成与太阳系中心的陨石类似。

A recent discovery makes such a determination possible: relative land-ice volume for a given period can be deduced from the ratio of two oxygen isotopes, 16 and 18, found in ocean sediments.

最近的一个发现使得这样的测定变得可行：过去某一时期相对陆地冰的数量可以从两种氧同位素，氧16和氧18的比例中推算出，这两种同位素发现于海洋沉积物中。

Studies of Sr, Nd and Pb isotopes of various stratigraphic units, granite plutons and fluorite ores indicate that the metallogenic materials of fluorite were derived from multiple sources, and the isotopic composition of fluorite is characterized by crust_mantle mixed sources.

各地层单元、花岗岩体和萤石矿石的Sr、Nd、Pb同位素研究表明，萤石的放射性同位素组成具有壳、幔源混合的特点，成矿物质来源具有多源性。

The initial Os and Nd isotopes of high-Ti/Y type picrites are consistent with those of magmatic rocks related to plume, indicating that they were derived from a mantle plume and experienced little contamination with a continental crust and SCLM, therefore, most probably representing Re-Os composition of a primary melt.

木里高Ti／Y型苦橄岩具有高的γOs值以及εNd_(t值，与全球地幔柱成因的岩浆岩石的初始Os同位素比值(γOs=+5～+10)一致，表明它们形成于地幔柱源区，而且它们几乎没有受到地壳或是陆下岩石圈地幔的混染。

Isotopes such as hydrogen, oxygen and sulphur show water source is complex, and composition of water is chiefly from middle Ordovician aquifer, added more and more from lower Ordovician aquifer from catchment area to discharge area.

本文系统总结了岩溶水中氢、氧、硫同位素组成特征，并从中提取了有关水的来源和水资源组成等信息，从多个角度论证了地球化学作用过程和水动条件。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。