同位素分布

上部碳酸盐岩型矿床的成矿元素组合为PbZnCdAsAgBa，硫同位素分布具塔式结构，显示具海水还原硫和深源硫的混合来源，有强烈的海底热液活动。

The metallogenic element assembles in carbonate type deposit are Pb-Zn-Cd-As-Ag-Ba , and the feature of sulfur isotopic distribution shows that the metallogenic material was derived from deoxidation of seawater and seafloor hydrothermal .

本文总结了中能重离子碰撞产生同位素分布的计算方法和模型，包括参数化公式，擦碎模型和统计擦碎模型。

The calculation method and models for the isotopic distribution produced in heavy ion collisions at intermediate energies which includes the parameterization formula , the abrasion ? ablation model and the statistical abrasion ?

中能重离子与~（nat）W相互作用中Hf的同位素分布

Isotopic distributions of HF from the interaction of heavy ions with ￣( nat ) w

裂变产生的惰性气体同位素分布，显著区别于Kr、Xe的天然同位素分布。

The percent isotopic abundance of Kr and Xe in nature air was different from that produced by heavy nuclide fission .

采用同位旋相关的量子分子动力学模型，研究了在轰击能量为40MeVu和100MeVu时，112Sn+112Sn和124Sn+124Sn反应产物的同位素分布。

Within the framework of isospin dependent quantum molecular dynamics model , isotopic distributions in the reactions of 112 Sn + 112 Sn and 124 Sn + 124 Sn at 40 and 100 MeV / u are investigated .

研究结果表明，该海域表层水中的铀同位素分布基本均匀，铀含量范围为1328&1420μmol·m-3，平均值为（13.82±0.29）μmol·m-3234U/238U平均放射性比值为114±003。

The results show that the concentration of uranium in surface water is varies from 13.28-14.20 μ mol · m - 3 , with an average of ( 13.82 ± 0.29 ) μ mol · m - 3 . The mean values of ( 234U / 238U ) A.

天然气氦同位素分布与大地构造环境

The Distribution of Helium Isotopes of Natural Gas and Tectonic Environment

拉萨河地区的大气降水同位素分布特征

Characteristics of isotope distribution of atmospheric precipitation in the Lasa River area

正烷烃单个化合物碳同位素分布初探

Preliminary Study of Stable Carbon Isotope Composition of Individual n-alkanes

热成因甲烷碳同位素分布的形成机制

The Mechanism of Carbon Isotope Fractionation During Thermogenic Methane Generation

气溶胶中正构烷烃单体化合物稳定碳同位素分布特征初步研究

Preliminary Study on Stable Carbon Isotope Distribution of Individual N Alkanes in Aerosols

太原盆地水环境同位素分布特征及其指示意义放射性同位素敷贴剂

The distribution characteristic of water environmental isotope in Taiyuan basin and their indication

然后利用数学方法，反演出病人体内同位素分布的情况。

The distribution of isotopes inside a patient can be reconstructed by mathematical methods .

化学不稳定性和同位素分布的同位旋效应

Chemical instability and isospin effects in isotopic distributions

中能重离子核反应同位素分布的统计模型计算

Statistical Abrasion Model Calculation of Isotope Distribution Produced by Intermediate Energy Heavy Ion Reaction

稳定同位素分布的基本规律

Fundamental Law of Distribution for Stable Isotopes

1994年夏季南海东北部海水氧同位素分布特征

Distributive characteristics of O isotope of the northeastern South China Sea in the summer of 1994

南海北部及珠江水体中Be同位素分布

Distribution of be isotopes in the water body of the Pearl River and Northern South China Sea

冲绳海槽表层沉积物中浮游有孔虫壳体的氧同位素分布特征及其影响因素

Oxygen isotope distribution characteristics and influencing factors of planktonic foraminiferal tests in surface deposits of the Okinawa Trough

该项技术已在探讨西太平洋浅层海水氦同位素分布的研究中获得了成功的应用。

This technology has been successfully applied to the reasearch about the distribution of helium isotopes in the shallow layer sea water of West Pacific Ocean .

以512矿床为例，研究了砂岩铀矿体铀、钍含量及其放射性同位素分布规律，由此讨论铀矿体的定位条件。

Exemplified by No.512 uranium deposit , this paper discusses the delineation of ore bodies in sandstone type uranium deposits by uranium and thorium concentrations and their radioisotopes .

从饱和烃生物标志化合物特征、正构烷烃单体烃碳同位素分布特征等方面入手，对该区的烃源岩的生源与沉积环境作了详细研究。

Based on the characteristics of saturated hydrocarbon biomarker and stable carbon isotope composition of individual n alkanes , the sedimentary environments of this area were studied in detail .

通过上述研究，对水体鄱阳湖悬浮颗粒物和沉积物有机质碳、氮同位素分布特征、有机质来源及它们之间的相关性有了初步的认识。

The origin of suspended particulate matter and surface sediment organic matter were identified , based on values of stable carbon and nitrogen isotope , as well as the correlations between them .

南海北部近代沉积物钕同位素分布及意义长江口及其邻近海域近代沉积物中甲藻孢囊的垂直分布

Nd isotopic variations and its implications in the recent sediments from the northern South China Sea Vertical distribution of dinoflagellate resting cysts in recent sediments from the Changjiang River Estuary and adjacent waters

目前的地幔碳的物相转变、沉积碳的俯冲和地幔去气等假说都很难解释这种碳同位素分布，原始地幔可能是碳同位素不均一的。

This type of carbon isotopic distributions is difficult to explain by the current hypotheses , such as phase transformation of carboniferous matters , subduction of sedimentary carbon or mantle degassing , and so it is possible that the primordial mantle is heterogeneous in carbon isotopes .

查明大气降水中同位素分布特征及其影响因素，不仅有助于定性或定量地研究地下水的起源和形成等问题，更有助于揭示三水转化关系。

Ascertaining the distribution characteristics and influenced factors of some isotopes in meteoric water is not only helpful to research the sources and form of groundwater qualitatively and quantitatively , but also reveal the change relationships of the rain water , the surface water and the groundwater .

~2HNMR研究分子中氢同位素氘分布

~ 2 H NMR study of deuterium distribution in molecule

东太平洋多金属结核U、Th同位素深度分布特征与生长速率

Depth Distribution Features of U 、 Th Isotopes and Growth Rates of Polymetallic Nodules in Eastern Pacific

南极普里兹湾海域铀系同位素的分布

Distribution of uranium-series isotopes in the Prydz bay , Antarctica

四川盆地三叠纪蒸发岩地层硫同位素的分布

Sulfur isotope distribution of Triassic evaporite and its geological significance in Sichuan Basin