同位素

The data the researchers have collected on the krypton and xenon isotope ratios are "superb," says physicist Bob Pepin of the University of Minnesota, Twin Cities."They're of a quality not seen before."

"研究人员搜集的有关氪和氙同位素比值的数据很可靠，"明尼苏达大学双城分校的物理学家鲍勃·佩平说，"这些数据的质量之高是前所未有的。"

In respect of mineralogy and petrology as well as strontium isotope, the Pl-lherzolite exhibits some features of transition from the cumulates to the mantle peridotite.

在矿物成分、化学成分及锶同位素等力面，含长二辉橄榄岩具有介于地幔橄榄岩和堆晶岩之间的某些过渡特征。

The study on the chronology, geochemistry and zircon Hf isotopes of the Zhuangzili and Mopanshan K-feldspar granites in Bengbu uplift was carried out in order to constrain their petrogenesis.

对蚌埠隆起区庄子里和磨盘山钾长花岗岩进行了系统的年代学和地球化学以及锆石Hf同位素的研究，以便对其岩石成因进行约束。

In this paper, though the field geological investigations, and studies of element-isotope geochemistry, mineralogy and the geo-chronology, combining with the regional geotectonic analysis, the geochemical characteristics and petrogenesis of the mafic dikes from the coastal areas of Guangdong Province and Hainan Island are discussed, mafic magma episodes and mantle characteristics are analyzed, and the relationships between mafic magmatism and lithosphere evolution are studied.

本论文通过野外地质调查和一系列配套的岩石化学、微量元素、同位素地球化学、矿物学及年代学方法，结合区域地质构造分析，对广东沿海地区及海南岛基性岩脉的地球化学特征、成因、基性岩浆活动期次、地幔源区地球化学特征，以及岩石圈结构特征、形成机理和演化等进行了探索性的研究，得出以下几点认识： 1。

We have carried out analyses on gas, mineral cement and bulk rock compositions and isotope ratios together with petrography and fluid inclusion to assess the origin of the H2S.

为了评估 H2S 的成因，分析了气体、矿物胶结物和全岩的组分和同位素，并进行了岩石学和流体包裹体的研究。

Phanerozoic examples of carbonate in dominantly clastic sequences also display wide variations in δ18O and δ13C Fig.

显生宙主成分为碎屑岩的碳酸盐样品也显示了较大范围的碳氧同位素变化。

We show that the combined oxygen and carbon isotope systematics are identical to those of well-understood Phanerozoic examples that lithified in coastal pore fluids, receiving a large groundwater influx of photosynthetic carbon from terrestrial phytomass.

他们得出一个引人注目的结论：这些氧和碳同位素的组合体系与我们非常了解的显生宙样品中的相同；显生宙样品岩化在了沿海的孔隙液中，接受着含有来自陆地植物质的光合作用碳的地下水流入。

The terrestrial expansion of an extensive, simple land biota indicated by the isotope data may thus have been a critical step in the transition from the Precambrian to the Phanerozoic world.

大量简单陆地生物的暴发显示同位素数据也同步发生着改变，这种改变从前寒武纪开始并且延续到显生宙的世界。

KR2 with the presence of surfactants and phenanthrene was measured by using spectrophotometer, which compared with the results by using isotopic methods.

首先采用分光光度计方法测量表面活性剂和菲共存时分枝杆菌KR2菌株的生长过程，并与同位素示踪方法的研究结果相对比。

The present results can be used to quantitatively determine the history of water-rock exchange and to serve geological thermometry for various igneous rocks (especially extrusive rocks containing phenocryst).

本文的结果可用于定量确定水—岩交换历史以及各种岩浆岩的氧同位素地质测温。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。