查询词典 isotopic

According to litho-geochemical data and H,O isotopic data gold is mainly derived from the deep-sourced magma and water of the ore fluid from magmatic water and meteoritic water.

氢氧同位素结果表明，流体中的水主要来自岩浆水和大气水。

In addition, our works also indicate that MC-ICPMS technique shows a good potential on Re-Os isotopic measurement. 2. A new method for the determination of low Re-Os abundances and ~(187)Os/~(188)Os in a natural rock sample by MC-ICP-MS has been established in our laboratory. Rock samples were digested in inverse aqua regia in sealed Carius tube for 24 hours at 230°C, then Os was separated from the matrix by CCl_4 solvent extraction, and further purification by microdistillation.

建立了Re-Os同位素样品的化学分离和纯化方法以及MC-ICPMS质谱测定方法：岩石样品的Re和Os化学分离方法是采用Carius管溶样法，结合四氯化碳萃取以及氢溴酸反萃取的方法分离出Os，最后是通过微蒸馏的方法纯化Os；利用阴离子交换树脂的方法分离纯化Re。

The results of high precise zircon U-Pb isotopic ages present the orders of intrusions in Tongling region: granodiorite→pyroxene diorite-pyroxene monzodiorite→quartz diorite-quartz monzodiorite.

高质量锆石U-Pb同位素~(206)pb/~(238)U加权平均年龄结果表明铜陵地区中酸性侵入岩的成岩序列为花岗闪长岩→辉石闪长岩→石英闪长岩。

Based on isotopic ages and the cycle of magamtism, the ages of Yanbian granites can be subdivided into five periods:①late Permian granites (260-245Ma), the typical plutons are Liukesong and Liangbing plutons, and the main rock type include diorite-monzonitic-K syenogranites;②Triassic granites (225-200Ma), the typical plutons are Sandaogou, Chunyang, Qishiergedingzi, Dahuanggou, Naozhi, and Qinglinzi plutons, the main rock type include quartz dioritesgranodiorites-monzonitic-alkali granites;③early Jurassic granites (190-180Ma), which composed of quartz diorites-granodiorites - monzonitic ,and the typical plutons are Shimen, Miantian, Daxinggou and Yushuchuan rock;④Middle-Late Jurassic (170-150Ma), which composed of granodiorites- monzonitic- garnet-bearing muscovite granites, the typical plutons are Huangniling, Weizigou, Loutuoshan and Dongqing rock;⑤early Cretaceous (about 130Ma), the typical pluton is Zhongping pluton, and its rock type is paulite diorite.

另外，根据同位素年龄和岩石组合并考虑到岩浆的旋回性，将延边显生宙花岗岩进一步划分为五个期次：1。晚二叠世(260-245Ma)，代表性岩体为六棵松和亮兵，主体岩性为辉石闪长岩、二长花岗岩和钾长花岗岩；2。三叠世(225-200Ma)，代表性岩体为三道沟、春阳、七十二个顶子、大荒沟、闹枝、青林子，岩石组合为石英闪长岩—花岗闪长岩—二长花岗岩—碱长花岗岩，以花岗闪长岩和二长花岗岩为主；3。早侏罗世(190-180Ma)，石英闪长岩—花岗闪长岩—二长花岗岩组合，主体岩性为花岗闪长岩，代表性岩体有石门、棉田、大兴沟、榆树川等；4。中侏罗世(170-150Ma)，主体岩性为花岗闪长岩和含石榴石花岗岩，代表性岩体有黄泥岭、苇子沟、骆驼山、东清5。

Detailed investigations on hydrogen speciation, hydrogen content, and its isotopic composition of garnet and omphacite in Dabieshan eclogites from several typical localities have been made by this grant; this is the first systematic research of UHP metamorphic fluids from the point view of NAMs.

本项目对大别山典型产地的榴辉岩中的石榴石和辉石进行了详细的结构水赋存状态的确定、结构水含量的测量和氢同位素组成的分析，这是首次系统地从名义上无水矿物的角度来研究超高压变质流体。

Three important conclusions are as follows:(1) the H2O content in garnet and omphacite can be up to 2000ppm and 3000ppm by weight respectively, indicating that they are significant carrier recycing surficial water into deep earth;(2) the heterogeneous distribution at the small scale of the H2O content and hydrogen isotopic ratios suggest that the whole subduction- exhumation process should be very fast;(3) the regular decrease of H2O content from rim to core within some garnet and omphacite grains indicates that hydrogen diffused out from mineral lattice during exhumation in response to sharp pressure decrease, and such hydrogen is expected to be involved in the early-stage retrograde metamorphism.

取得的主要科学认识包括：(1)石榴石和绿辉石的结构水含量可以分别高至2000ppm和3000ppm，这表明它们是板块俯冲过程中将地表水携带进地球深部的重要载体；(2)水含量和氢同位素组成表现出小尺度的不均一分布，说明板块的俯冲和折返过程是十分快速的；(3)在板块折返的早期，由于压力的降低，矿物中的H 会发生不同程度和尺度的扩散，这是早期退变质流体的重要来源。

In order to make it clear that the formation age and source region of Sanchazi island are volcanic rocks from the Mianlue suture. Ziron U-Pb dating, Hf isotopic composition and trace element concentration on the Diabase dike swarm collected front island-arc ophiolitic mélange in Mianlue suture, south Qinling are studied.

为了弄清楚勉略构造带中三岔子岛弧火山岩的形成时代及源区特征，对南秦岭勉略缝合带三岔子岛弧蛇绿混杂岩中的辉绿岩墙样品进行了锆石U-Pb年代学、锆石Hf同位素组成及微量元素组成研究。

Stable isotopic composition of fossil ostracode is used as an ideal proxy for paleo-lake sedimentary environments.

介形虫化石壳体被认为是反映古湖泊沉积环境的理想对象。

The principal contents of the symposia on stratigraphy in the 31st International Geological Congress comprise the following aspects:geologic time scale, biostratigraphy, event stratigraphy, sequence stratigraphy, magnetostratigraphy, isotopic stratigraphy, integrated stratigraphy, sedimentary facies and palaeogeography, palaeobiogeography, and tectono-palaeogeography.

介绍了第 3 1届国际地质大会有关地层学学术讨论的主要内容，包括地质年代表、生物地层学、事件地层学、层序地层学、磁性地层学、同位素地层学、综合地层学、沉积相与沉积古地理、生物古地理、构造古地理 10个方面。

The analysis of group component, stable carbon isotopic compositions and biomarker, and the geochemical characteristics of the oil and gas show that the oil comes from the Palaeogene and the oil reservoir is new bed-generating and old bed-storing; the gas comes from Carboniferous-Permian and the gas reservoir is old bed-generating and new bed-storing.

通过对油气族组成、稳定碳同位素组成及生物标志化合物进行油气地球化学研究，认为东濮凹陷三叠系砂岩裂缝性油藏原油来源于古近系，油藏类型为新生古储式；天然气来源于石炭-二叠系，气藏类型为古生新储式。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。