轻同位素

与大气降水季节性效应相反：夏季温泉水相对富轻同位素，冬季则明显富重同位素；

The thermal spring water has a light isotope composition in summer and a heavy isotope composition in winter .

科学家们指出氮的超出重量可能来自彗星；重量较大的氧来自某种自然过程，在此过程中，大部分的轻同位素留在了形成太阳的部分星云中。

Scientists say the excess heavy nitrogen could have come from a comet . And the heavier oxygen from a natural process that left more of the light isotope in the part of the nebula that made the sun .

用核反应能谱法测量轻同位素的深度分布

Depth Profiling of Light Isotopes by Use of Nuclear Reaction Energy Analysis

我们认为这是碳酸盐不饱和的热水溶液对碳酸盐沉积物中轻碳同位素（~（12）C）优先淋滤的结果。

This may be due to preferential leaching of light carbon isotope ( 12C ) out of carbonate sediments by hydrothermal fluids .

富Au辉锑矿以早期细粒、富含As以及Se、Te等杂质和具有轻S同位素组成为特征。

The high Au stibnites are characterized with the early fine grains , high As , Te , Se of impure constituent elements and light S isotope composition .

湘桂走廊地区大气降水明显的富集轻硫同位素（32S），而珠江三角洲地区则富集重硫同位素（34S）。

It is indicated that the sulfur isotopic composition of precipitation of Xiang-Gui Corridor is enriched in 32S , however , which of the Pearl River Delta is enriched in 34S .

某种元素的同位素有几种轻微不同的化学性质，生命体选择轻的同位素。

Isotopes of an element have slightly different chemical properties , and life prefers to use the lighter isotopes .

加拿大安大略省提敏斯霍林格尔&麦克因蒂尔含金石英脉系的地质特征，流体性质和轻稳定同位素地球化学

The Hollinger-Mclntyre Au-Quartz Vein System , Timmins , Ontario , Canada ; Geologic Characteristics , Fluid properties and Light Stable Isotope

前者富铊，低氯、高氟和硼，富轻硫同位素，相对贫稀土元素；

The former is rich in Tl but poor in Cl , high in F and B , and rich in light sulfur isotope , relatively depleted in REE ;

轻稳定同位素地球化学研究，表明成矿溶液中硫、碳同位素组成与含矿岩石的性质有关，就地取材特征表现非常明显；

Scientific research on light stable isotope geochemistry indicates that the isotopic composition of sulphur and carbon in ore-forming solution relate to nature of ore-bearing rocks , and the character of " draw on local resources " displays very clearly ;

论轻、重同位素分离的整体性

On the light and heavy isotope separation

此仪器可用于气体分析以及轻元素的同位素丰度测定。

This instrument can be used for gas analysis and determine of isotopic abundance of light elements .

测定锂，硼，碳，氮等轻元素的同位素丰度时适用的核反应及γ射线在第四节中逐项讨论。

Nuclear reactions and γ rays suitable for the determination of isotopic abundances of Li , B , C and N are enumerated .

其地球化学特征表现在烃类的组成、C6&C7的轻烃组成及同位素组成等方面有着明显的不同。主体为高成熟的腐泥型气，与海相原油密切共生；

The geochemical characteristics of natural gas exhibit a great variations with respect to composition of hydrocarbon , C_6 & C_7 light hydrocarbon , isotope and so on .

莺歌海盆地乐东和东方地区、琼东南盆地崖13-1构造原油的Mango轻烃参数和同位素组成有明显差异，这可能是油源不同或原油成藏分异效应不同所致。

Mango parameters and the evolution of parents and its children indicate that crude oil exists difference in Ledong and Dongfang area . It show they come from different source rock or have distinguishable effect during forming reservoir .

裸露剖面的氧同位素组成比埋藏剖面轻，而碳同位素略重。

Oxygen isotopic compositions are lighter in the exposed profile than those in buried profile ;