氧同位素

海南岛古生代岩石Rb-Sr年代学和氧同位素研究

Study on Rb-Sr geochronology and their oxygen isotopes of Paleozoic rocks on Hainan Island

以贵州罗甸二叠纪剖面为研究对象，详细讨论了海相碳酸盐岩的碳、氧同位素组成特点，及影响碳酸盐岩的δ13C和δ18O的主要因素。

The paper details the compositions of the carbon and oxygen isotopeS in marine carbonate rocks from Luodian profile and analyzes the factors influencing δ 13C and δ 18O carefully .

硅酸盐和金属氧化物矿物氧同位素组成的CO2激光氟化分析

Oxygen Isotope Analysis of Silicate and Metal Oxide Minerals by CO_2 Laser Fluorination

冲绳海槽Z（14）-6孔氧同位素地层学研究

The oxygen isotopic stratigraphy of core z_ ( 14_6 ) in Okinawa Trough

与Nd、Sr、Pb同位素不同，氧同位素缺少上述变化规律。

Unlike Nd , Sr and Pb isotopes , O isotope lacks the above regular variations .

本文提出了一个用CO2&H2O平衡法测定水中氧同位素组成的新的计算公式，并进行了数学推导。

A new expression and its mathematical calculation for estimating δ ~ ( 18 ) Ovalue in water by using CO_2-H_2O equilibrium technique have been proposed .

其分类方法主要依赖于地球化学特征的研究，包括阴极发光、电子探针、碳氧同位素、稀土元素以及X射线衍射分析。

The classification method depends on mainly the study of geochemical characteristics , which includes cathodeluminescence , electron probe , carbon-oxygen isotope , rare earth element and X-ray diffraction analysis .

皖南蛇绿岩套辉长岩锆石U-Pb定年以及元素和氧同位素研究

Zircon U-Pb Dating and Element and Oxygen Isotope Geochemistry of Gabbro from Ophiolites in South Anhui

南极中山站至DomeA剖面表面雪样氧同位素组成

Oxygen isotope composition of surface snow collected in the austral summer along the traverse route from Zhongshan station to dome a , antarctica

将剖面氧同位素和结构羟基含量的分析结果相结合，我们发现石榴石和绿辉石等矿物的氧同位素组成随着深度的变化与对应矿物的OH含量具有一定的相关性。

A profile-comparison of oxygen isotope ratio and hydroxyl content shows a consistent change with depth between δ ~ ( 18 ) O value and OH content in garnet , omphacite and other minerals .

结果表明，这两种片麻岩在氧同位素组成上存在显著差别：黑云母片麻岩与共生的榴辉岩δ18O值呈同步变化，全岩δ18O值从－4.7‰变化至＋10.3‰；

The results show significant differences in oxygen isotope composition between biotite gneiss and granitic gneiss .

威海地区超高压变质花岗片麻岩锆石U-Pb定年和氧同位素研究

A Study of Zircon U-Pb Dating and Oxygen Isotopes in UHP Granitic Gneiss from the Weihai Region in Northeast Sulu

深海氧同位素记录表明新生代曾发生至少三次快速变冷事件，它们分别发生在36，15和2.4MaBP前后。

Deep sea Oxygen isotopic data indicated that there were at least three rapid cooling events in the Cenozoic Era , which happened respectively at 36 Ma , 15 Ma and 2 . 4 Ma BP .

氧同位素值、Li、B和Al浓度随埋深而增大，高的锶浓度指示了水－铝硅酸盐矿物反应是受温度控制的，Mg－Li可指示古地温。

δ 18O and the concentrations of Li , B , Al increase with the burial depth . Sr-content which is relatively higher than the average indicates that reactions between water and aluminosilicate are controlled by the temperature .

金矿石中碳酸盐矿物的碳氧同位素组成显示成矿流体中的CO2很可能来自深部（岩石圈地幔甚或更深）。

Carbon and oxygen isotope composition of carbonates in gold ores indicates that CO 2 in ore forming fluids was probably derived from deep interior of the Earth ( lithospheric mantle or deeper ) .

利用FinniganMat-252气体同位素质谱计分析碳酸盐氧同位素的结果校正

Oxygen Isotope Calibration of Carbonate Minerals Measured by Finnigan MAT 252 Gas Mass Spectrometer

西南极布兰斯菲尔德海峡PC10孔硅藻氧同位素记录及其沉积学意义

Silica oxygen isotope of diatom from core PC 10 in the BRANSFIELD strait , antarctica

氧同位素δ（18O）值由5.46‰变化到5.70‰，平均值为5.60‰。

Oxygen isotopic value δ( ~ ( 18 ) O ) changes from 5.46 ‰ to 5.70 ‰, and the average value is 5.60 ‰ .

应用AgNO3+C的新的焊封管燃烧法进行了NO-3中氧同位素分析。

Oxygen isotope analysis in NO - 3 was conducted by using new sealed-tube combustion technique of AgNO 3 + C.

对皖南蛇绿岩套辉长岩分别进行锆石微区U-Pb定年、全岩主微量元素分析和Sr-Nd同位素分析、矿物氧同位素分析。

Zircon U-Pb dating , whole-rock major and trace elements , Sr-Nd isotopes , and mineral O isotopes were determined for samples from ophiolites in south Anhui .

接着，下寒武统底部以碳和氧同位素值的快速负向漂移为标志，表明古气候迅速变暖和海平面大幅度上升，烃源岩TOC值也达到全井柱最高值。

Then the beginning of Cambrian or Paleozoic is marked by a rapid negative shift of both carbon and oxygen isotope values , suggesting a rapid warming of climate and large scale rise of sea level .

因此，矿物之间的氧同位素平衡与否，能够对矿物Rb-Sr体系封闭后平衡状态的保存性以及矿物内部等时线定年的有效性予直接制约。

In this regard , oxygen isotope equilibrium between the minerals provides a direct constraint on the Rb - Sr isotope equilibrium and thus the validity of the mineral isochron .

氧同位素5e亚期为最温暖时期，海水冬季表层水温高出现代1.9℃；

Oxygen isotope substage 5e was the warmest periods , during which the winter sea surface temperature ( SSTw ) was 1.9 ℃ higher than that of today ;

对黔南、浙西新元古代碳酸盐盖帽碳氧同位素研究表明，δ13C负异常是甲烷渗漏和海水翻腾共同作用的结果。

The author 's study indicates that the negative excursions of carbon isotopic compositions of Neoproterozoic cap carbonates in southern Guizhou and western Zhejiang resulted from the combined action of destabilization of gas hydrate and overturning of sea water .

碳、氧同位素（δ13C和δ18O）组成表明，既有沉积围岩中的碳，也有深部来源的碳，具有混合来源特征。

Carbon and oxygen isotopic composition (δ 13 C and δ 18 O ) shows that the carbon not only derived from depth source but also sedimentary country rock . Obviously , it is a mixture source .

深海氧同位素第3阶段（MIS3）晚期，世界气候比较温湿，世界海平面比现代海平面低约20～40m。

In later marine isotope stage 3 ( MIS 3 ), the world climate was relatively wet and humid , and the world sea level was about 20 ~ 40m lower compared with the modern sea level .

由流体流动速率和扩散/弥散系数定义的Peclet数决定了上述两种机制在一定尺度上对氧同位素迁移的相对贡献。

Peclet number , defined by the rates of fluid flow to diffusion dispersion , determines relative contribution of the above two mechanisms to oxygen isotope transport on some scales .

这表明受内部流体影响使花岗岩发生低温热液蚀变时，即使氧同位素体系受到扰动，Rb-Sr等时线仍可以有地质意义。

The case studied suggested that Oxygen isotopic system could be disturbed while the Rb-Sr could still give a geologically meaningful age when the granite was affected by an internal fluid during the low temperature alteration .

用AgNO3+C（石墨）测定NO-3中氧同位素比值的密封石英管燃烧法，它们是1995年以后发展起来的最新测试技术。

The oxygen isotope analyses in NO ~ - _3 were conducted using a new sealed combustion quartz tube technique of AgNO_3 + C. It has become the up-to-date technique since 1995 .

该文从洞穴石笋δ18O与温度、降水的相关关系以及不同时间尺度下所指示的气候意义等角度对当前洞穴石笋气候学中氧同位素的应用进行了总结分析。

In particular the problems in the relationship of the temperature or the precipitation with δ ~ ( 18 ) O , the relation of the oxygen isotope with temperature and precipitation , and also the meaning of different time-scale are described .