The isotopic signatures of most ancient limestones indicated the same process.

大多数古代石灰岩的同位素特征说明了同样的过程.

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Isotopic discrimination is not likely.

同位素甄别是不可能的.

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Evidence from isotopic dating suggests that the greenstone belts vary considerably in age.

来自同位素年龄鉴定的证据指出,绿岩带在年龄上彼此变化相当大.

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It is important to avoid the use of uranium compounds of unspecified isotopic composition.

要避免使用那种非专用的同位素成份的铀化合物.

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Isotopic and trace elements data show that mineralizing materials are of multi - sources.

同位素及微量元素研究表明,成矿物质具有多源性.

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The isotopic abundance ratio and content are determined with isotopic mass - spectrometry.

文章用同位素质谱法测定了辐照堆元件铀的同位素丰度比和含量.

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The environmental isotopic tracer is a new technique developed in recent years.

环境同位素示踪技术是近几年新发展起来的一项新技术.

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An isotopic analysis of the grains has made that fear come true.

一项对这些颗粒的同位素分析让这种担心成真了.

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Isotopic scans demonstrate a nonfunctioning ( cold ) nodule that does not concentrate radioiodine.

同位素扫描显示无功能 ( 冷 ) 节,它不能浓集射碘.

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This change does not disturb isotopic fractionation andthethe stalagmite able to keep environment information.

转化作用不影响同位素分馏,石笋同时全面记录古气候环境信息.

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The isotopic dating and fossil geochronometry are the basic methods of ophiolite geochronometry.

同位素测年及化石年代学法是蛇绿岩年代学研究的基本方法.

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This paper determined the sulfur isotopic composition of the Mianning REE deposit, Sichuan Province , China.

分析了四川冕宁大型稀土矿床硫同位素组成.

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The results agree with those by using isotopic method reported in the literature.

与文献报道的同位素方法研究结果相同.

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The catalysis of enzymes causes much more complexity for the isotopic fractionation under microbial actions.

辅酶对反应的催化作用使微生物作用造成的同位素分馏更加复杂.

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Stable isotopic method can be used effectively in the diagenetic research of deep water carbonate rocks.

稳定同位素方法可以有效地应用于深水碳酸盐岩的成岩作用研究.

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