碳同位素

中国东部地幔CO2流体包裹体的碳同位素初步研究

Preliminary study of carbon isotope in mantle co_2 fluid inclusion from eastern China

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 .

冰川冻土地区对碳同位素形成的影响及~（14）C测年采样方法

Effect of Glacier-permafrost on Isotopic Formation and Sampling Method of 14 ~ C Dating

通过C（27）/C（29）甾烷和有机碳同位素来判断早古生代和前寒武纪的烃源岩的生物来源

Biological origin of Early Palaeozoic and Precambrian hydrocarbon source rocks based on c_ ( 27 ) / c_ ( 29 ) sterane ratio and organic carbon isotope

植物营养元素的含量和δ~（13）C值随海拔而变化的特征及营养元素相互作用对碳同位素分馏作用的影响

Altitudinal variations of nutrient concentrations and carbon isotope compositions in a c_3 plant and the effects of nutrient interactions on carbon isotope discrimination in limestone areas of Southwest China

CO2碳同位素等地球化学特征显示，松辽盆地南部多处发现的高含量CO2气藏属于无机成因天然气。

Geochemical indexes indicate that the gas reservoirs with high CO2 content in many parts of Southern Songliao Basin belong to inorganic-origin gas .

最后，以东营凹陷滨南油田的CO2气为实例，利用碳同位素资料，探讨了该油田几个主要区块CO2气的成因。

In the last part , the origin of CO_2gas in some part of Binnan oil field in Dongying depression is surveyed based on data of carbon isotopes .

作者认为，洞穴区域性生态差异与土壤CO2产率不同是导致石笋碳同位素复杂多变的主要原因。

The author suggests that the region ecologic discrepancies and the different productivity of soil CO_2 is the main cause of the variability of the stalagmite carbon isotope .

石笋ML（s）灰度和碳同位素序列很好地对应了石笋年纹层季节韵律。

The grey level and carbon isotope series of the stalagmite ML ( s ) commendably corresponds to the seasonal rhythm of the stalagmite annual layers .

天然气中甲烷碳同位素组成较轻，δ~（13）C1值为-52.03‰，分布在生物气与热解气的混合区内。

C-isotopes in CH_4 is fairly light with a δ ~ ( 13 ) C_1 of - 52.01 % , such gas lies within the range of a mixture of biogenic gas and pyrolytic gas .

结果表明，这两条剖面寒武-奥陶系界线附近的碳同位素组成以负δ13C值为主。

Carbonates across the Cambrian-Ordovician boundary of both sections mainly record negative carbon isotope values .

煤层瓦斯因与CO2之间的碳同位素交换或因生物作用而富含~（12）C。

The gas in coal bed is rich in ~ ( 12 ) C , because of the exchange of carbon isotope between the gas in coal bed and the CO_2 or the organism reaction .

根据天然气碳同位素值（δ~（13）C）呈正碳同位素系列分布，气源为有机成因，甲烷及重烃气为自生自储，经深演化过成熟的油型裂解干气。

The positive values of C-isotope show that the natural gas was formed in an organic origin , and that the methane and heavy hydrocarbon are oil-cracked dry gas which was authigenic and autochthonous and underwent a deep-evolution and overmaturation process .

一般认为，任何植物体的碳同位素组成主要与光合作用的C3和C4两种碳固定途径有关。

It is generally accepted that the carbon isotopic composition of plant material is correlated with C3 and C4 pathways of carbon fixation in photosynthesis .

文章研究特选择在秋初，湖泊分层开始消失时，测定了湖水中不同深度的N2O，CH4，CO2，有机和无机碳同位素以及其他化学参数变化。

In this paper N 2O , CO 2 , CH 4 , carbon isotope and some physical and chemical parameters are determined in fall when the stratification begin to disappear .

将固相微萃取（SPME）技术与冷阱富集系统相结合，对水体中痕量挥发性有机物进行了单体碳同位素分析，方法检测限较常规SPME提高了一个数量级。

A method combining solid phase microextraction ( SPME ) with cryofocus technique was developed for the compound-specific carbon isotope analysis of volatile organic compounds in aqueous phase .

原油饱和烃含量在70%以上；碳同位素值偏轻，δ13C值一般小于-31‰；

The content of saturated hydrocarbon is over 70 % , and the carbon isotope value is relatively light with δ ~ ( 13 ) C commonly lower than-31 ‰ .

根据岩浆来源CO2和CH4之间的碳同位素分馏值计算，目前该区深部岩浆热源的温度应高于514℃。

And now , the temperature of mantle derived magma intrusion should be higher than 514 ℃ according to the carbon isotopic fractionation between the mantle derived CO 2 and CH 4 escaped from the deep reservoir .

据碳同位素地质测温估算，该岩浆体的热变质带顶部距地面约5km。

Based on the carbon isotope geothermometer , the top of magmatic reservoir is 5 km from the land surface in crust .

作为指示水分利用效率的可靠指标，叶片稳定碳同位素组成（δ13C值）可以用来探讨植物适应干旱环境的强弱程度。

As a reliable indicator of long-term water use efficiency in C3 plants , leaf carbon isotope ratios were often used to evaluate the adaptive degree of plants to arid environments .

电厂燃煤和高效民用锅炉燃煤产生的多环芳烃分子化合物的稳定碳同位素组的范围为-22.0‰～-31.2‰，随着分子量的增大PAHs分子化合物中13C含量降低。

The δ 13C values of PAHs from coal combustion in power plant are similar to those of domestic high efficiency coal combustion , ranging from - 22.0 ‰ to - 31.2 ‰ and PAHs decreases in 13C with the increase of molecular weight .

在此基础上，还在温泉区采集了4个气样，测定了气体组分的含量及氦同位素，以及CO2和CH4的碳同位素。

Evidences show that the geothermal waters in the area are of meteoric origin . Gas chemistry , helium isotopic composition , and carbon isotopic abundance of carbon dioxide and methane for 4 gas samples from hot springs are measured .

研究表明，强烈的水动力交替作用使煤层气藏中的H2S含量降低、甲烷碳同位素变轻、甲烷含量降低、氮气和二氧化碳含量增大。这些变化对煤层气成藏造成不利影响。

Study shows that H2S and methane concentration will be reduced , δ 13C1 be lightened , N2 and CO2 contents be increased under the strong hydrodynamic alternation , which have unfavorable impact on CBM accumulation .

根据δ13C-δ18O图解分析，区分出了3种不同类型的碳同位素：（1）三叠纪海洋生物碳；

On the δ 13 C - δ 18 O diagram , three different types of carbon source may be distinguished :( 1 ) carbon from Triassic marine organism ;

本区碳同位素地层曲线与根据沉积微相推断的海平面变化曲线十分吻合，表现为δ13C高值区海水变深。

The carbon isotope curve of the strata coincides with the variation curve of sea level inferred from sedimentary facies . The deepening of sea water conforms to the peak of ? 13C value .

依据盆栽试验数据，利用植物稳定性碳同位素分辨率的理论模型，研究了水分和氮磷营养对小麦叶片碳同位素分辨率（Carbon-isotopediscriminationΔ）的影响。

Data obtained from pot experiments was analyzed using a theoretical model of carbon isotope discrimination (Δ) for the effects of soil moisture and nitrogen phosphorus nutrient on carbon isotope discrimination .

利用地下水氢氧同位素（2H、3H和18O）和碳同位素（14C）方法，分析银川平原承压水的补给更新能力。

With the application of hydrogen and oxygen isotopes ( 2H , 3H and18O ) and carbon isotope ( 14C ), the recharge and renewability of confined water in Yinchuan Plain have been analyzed .

沉水植物光合作用中碳同位素分馏的分析表明，沉水植物的δ13C值同水中溶解无机碳的浓度有关，从而与影响其改变的各种因素相关。

According to the model of stable carbon isotopic fractionation in submerged plant , the concentration of dissolved inorganic carbon ( DIC ) is an important environmental factor influencing the δ 13C of submerged plants .

230℃和250℃温度下溶液中CH4和CO2之间的碳同位素交换反应的实验初步证实它们在水溶液中要比在于系统中容易进行同位素的交换。

A series of experiments of carbon isotopic exchange reaction between CH_4 and CO_2 in solutions at 230 ℃ and 250 ℃ preliminarily showed that the isotopic exchange between CH_4 and CO_2 would takes place more easily in an aqueous solution than in a dry system .

由于多阶成烃、混源聚集和后期遭受TSR次生蚀变等成藏过程的复杂性使得天然气组分较干、碳同位素组成复杂，常规方法进行气源对比较困难。

The complexity of multi-phase hydrocarbon generation and accumulation of mixed sources , and subsequent secondary alterations make the gas drier , carbon isotopes more complicated , and gas to source correlation more difficult .