當(dāng)?shù)?/c>樹木的木材中的氧同位素組成（isotopiccomposition）。
The ideal choice, when isotopic composition is used to investigate the source of copper ore, would seem to be copper itself.
當(dāng)同位素構(gòu)成被用來研究銅礦石的來源時，理想的選擇似乎是銅本身。
The osmium isotopic compositions and model age of mantle peridotite xenoliths from Jiangsu-Anhui area and their geological significance.
蘇皖地區(qū)幔源橄欖巖捕虜體的鋨同位素組成、模式年齡及其意義。
The ore and the magma share similar lead isotopic features which suggests a close relations between them.
礦石和巖漿巖具有非常相似的鉛同位素組成，暗示了二者的親緣關(guān)系。
Inorganic Mass Spectrometry is preferably used each time extremely low concentrations and isotopic abundance are to be determined.
每當(dāng)測定非常低的濃度和同位素豐度時總是首先使用無機質(zhì)譜法。
Up to now, there are no systematic geochemical studies and isotopic age for the Zhuanghe gold deposit, eastern Liaoning.
到目前為止，對遼寧莊河金礦尚沒有做過系統(tǒng)的礦床地球化學(xué)和同位素年代學(xué)的研究。
Therefore, development of isotopic analytical techniques is always a major task of study on isotopic geochemistry.
因此發(fā)展同位素測試技術(shù)始終是同位素地球化學(xué)研究的一個主要方面。
This paper, combined with previous data, briefly summarizes the results of isotopic studies of these deposits.
本文結(jié)合前人的資料，對這些礦床的同位素研究成果作一概括性總結(jié)。
Isotopic response" describes the occurrence of a new disorder at the site of another, unrelated, and already healed skin disease.
“同位素的反應(yīng)”，敘述了發(fā)生新的疾病在現(xiàn)場的另一無關(guān)，并已治愈的皮膚疾病。
between samples of the common ore minerals of copper, isotopic variations greater than the measurement error have not been found.
在普通銅礦的礦物質(zhì)樣品之間，超過測量誤差的同位素差異還尚未被發(fā)現(xiàn)。
The characteristics of hydrogen and oxygen isotopic compositions indicate that the hot spring water iso originated from the meteoric water.
氫氧同位素組成特征表明，溫泉水來源于大氣降水。
The distribution pattern of the carbon isotopic compositions of the individual n-alkanes shows almost no change during this process.
同時也證明了生排烴過程不影響正構(gòu)烷烴單體碳同位素組成曲線的形狀；
The isotopic dating and fossil geochronometry are the basic methods of ophiolite geochronometry.
同位素測年及化石年代學(xué)法是蛇綠巖年代學(xué)研究的基本方法。
The proportional and carbon isotopic compositions of hydrocarbon and non-hydrocarbon gases are almost identical among these gold capsules.
即不同金管之間氣態(tài)烴的相對含量和碳同位素組成差異很小。
Electron impact-induced dissociation by hydrogen and its isotopic molecule will occur in edge plasma.
在邊界等離子體中氫及其同位素分子與電子碰撞可以發(fā)生解離反應(yīng)。
These dating methods have made great progress in the quaternary geochronology and isotopic geoscience.
這些定年方法在第四紀(jì)地質(zhì)年代學(xué)和同位素地質(zhì)科學(xué)中獲得了很大進(jìn)展。
Different metabolic pathways represent different biochemical reactions and result in significant variations in the isotopic fractionations.
不同的微生物代謝途徑代表不同的生物化學(xué)反應(yīng)，造成了同位素分餾的顯著差異；
Researchers collected rocks and measured minute isotopic variations in rare earth elements called neodymium and samarium.
科學(xué)家收集了巖石樣本，并測定了稀土元素釹和釤的微小的同位素差異。
Magma rising from deep within the Earth has a different isotopic and chemical composition than magma that forms just below Earth's crust.
從地球深處所噴出的巖漿與僅低于地殼表面所形成的巖漿有著了不同的同位素和化學(xué)成分。
The neck should be examined yearly. Isotopic scanning is not repeated routinely.
每年應(yīng)作頸部檢查，按常規(guī)不需要進(jìn)行同位素重復(fù)掃描。
and preliminary studies indicate virtually uniform isotopic composition of the lead from a single copper-ore source.
同時，初步的研究顯示，源自同一個礦井的石墨同位素組成事實上是相同的。
However, contrary to previous views, there is no isotopic evidence that Archaean rocks are present in the Mashan Complex.
然而，與以前的認(rèn)識相反，麻山雜巖不存在具有太古宙基底的同位素證據(jù)。
The isotopic tracing technique is an advanced method in the research of photosynthesis of plants.
同位素示蹤技術(shù)是進(jìn)行植物光合作用研究十分有效的手段。
This paper also discussed the method to analyze the individual hydrocarbon isotopic composition from crude oil and coal rock samples.
本文還介紹了原油和煤可溶有機質(zhì)中飽和烴絡(luò)合前后的單體烴碳同位素分析方法。
Heavy water is also used in research as an isotopic tracer for chemical reactions and biochemical pathways.
在實驗研究中，可用作化學(xué)過程和生物化學(xué)過程的同位素示蹤劑。
There exist possible isotopic fractionation effects in generation-expulsion process of terrestrial source rocks.
在陸相干酪根生排烴過程中，烴類可能會發(fā)生同位素分餾效應(yīng)。
This paper describes Pb, H, O, C isotopic feature which provide metallogenic information for the deposits.
文章闡述了金礦床的硫、鉛、氫、氧、碳等同位素地球化學(xué)特征，從而提供了礦床成因信息。
Compared with water amount, the quality of aqueous medium has less effect on the yields, components and hydrogen isotopic composition.
與加水量相比水介質(zhì)性質(zhì)對有機質(zhì)成氣產(chǎn)率、組分組成和氫同位素組成的影響較小。
The molecules' structures and isotopic signatures record their biological origin and history.
分子構(gòu)造和同位素標(biāo)識記錄了他們的生物學(xué)起源以及歷史。
Precise determination of the platinum-group elements and Os isotopic ratios in low-level rock samples.
巖石樣品中低含量鉑族元素和鋨同位素比值的高精度測量方法。
National Geographic reports that isotopic dating and DNA experiments revealed the unusual pairing of body parts.
據(jù)《國家地理雜志》報道，同位素定年和DNA檢測結(jié)果顯示，這兩具木乃伊的身體部位“不尋常”。
In the safeguards environmental sampling, analyzing isotopic ratio of single uranium-bearing particle in swipe samples was very important.
在核保障環(huán)境取樣分析中，對含鈾單微粒進(jìn)行元素和同位素分析是十分重要的。
Isotopic studies from geothermal fields indicate that about 95% of the thermal fluid from steam wells is meteoric in origin .
地?zé)?/c>田油同位素研究證明：蒸氣井熱流體的95%左右是大氣降水成因的。
The H-O isotopic compositions of fluid inclusion represent the mixture of atmospheric precipitation.
流體包裹體中H、O同位素反映在成礦的過程中有大氣降水加人。
It's very difficult to explain and evaluate information owing to the isotopic pollution which leads to untruth well log information.
由于存在同位素污染，造成測井資料失真，給解釋評價帶來困難。
An isotopic fractionation of boron during evaporation of seawater was investigated.
對自然界海水蒸發(fā)過程中的硼同位素的分餾進(jìn)行研究。
Stable isotopic method can be used effectively in the diagenetic research of deep water carbonate rocks.
穩(wěn)定同位素方法可以有效地應(yīng)用于深水碳酸鹽巖的成巖作用研究。
By using hydrogeochemical and isotopic methods, the origin of the geothermal water and the CO2 gas were discussed.
利用水文地球化學(xué)方法、同位素分析方法等，對地下熱水和二氧化碳氣體的成因進(jìn)行了分析；
It is showed that compensated neutron logging can be realized by using neutron generator instead of isotopic neutron source.
結(jié)果表明，可以用中子發(fā)生器代替同位素中子源實現(xiàn)補償中子測井。
英 [a?s??'t?p?k] 
