沥青铀矿

The main paragenetic minerales are: uranophane, uranium blacks, autunite, meta-torbernite, microquartz, quartz, ankerite, calcite, fluorite, hydromica, pyrite, galena, sphalerite, and chalcopyrite.

矿化作用共可分为八个阶段，同位素研究结果表明，矿床中的铀主要来自岩浆溶液，部分轴来自围岩——侏罗系长石石英砂岩。沥青铀矿的同位素年龄为108—109百万年。

But an unexpected fact was noted: certain minerals (pitchblende, chalcolite, autunite) had a greater activity than might be expected on the basis of their uranium or thorium content.

但是一个意外的事实引起了我的注意：某些矿物质(沥青铀矿物质、铜铀云母或钙铀云母)的活性比根据其铀或针含量所判断的要高。

Curies research into the properties of two different uranium ores, pitchblende and chalcolite. led to the discovery of radium and polonium, other radioactive elements.

居里对两种沥青铀矿和铜铀矿的性能研究引导了镭和钋以及其他放射性元素的发现。

The crystallization speed is variable with the changing of temperature and pH in the system.

沥青铀矿的结晶速度在不同的温度和pH条件下是不同的。

Radium does not occur free in nature but occurs in natural ores such as pitchblende as a disintegration product of radioactive decay of heavier elements, including uranium.

在自然界镭不存在游离状态，但存在于天然矿石中，如沥青铀矿，是更重元素放射性衰变的产物。

Radium does not occur free in nature but occurs in natural ore s such as pitchblende as a disintegration product of radioactive decay of heavier elements, including uranium.

在自然界镭不存在游离状态，但存在于天然矿石中，如沥青铀矿，是更重元素放射性衰变的产物。

It is first found that there is an important difference in order-disorder of crystalline structure between the artificial pitchblende and natural pitchblende. Unlike natural pitchblende in which uraninite nanocrystals arrange in order, the artificial pitchblende only contains disorderly uraninite nanocrystals.

在国内、外首次发现此类人工合成沥青铀矿和天然沥青铀矿在晶体结构的有序—无序上存在重大差异：天然沥青铀矿中的纳米级晶质铀矿为有序排列，而人工合成沥青铀矿中的纳米级晶质铀矿则为无序排列。

A mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called ''.

一种含有氧化铀和少量镭、钍、钋、铅、氦的矿物；块状的晶质铀矿称为沥青铀矿，是主要的铀矿石。

In this paper, the progresses acquired in the studies of natural analogy are summarized, including a comparison of structural properties, radiation damage and chemical composition between uraninite and UO2, combination and paragenesis of alteration products of uraninite, chemical composition of uraninite and its secondary phases, mobility of analogy elements in the process of uraninite alteration. In addition, the problems in next studies are pointed out, e. g., characterization of micro-structure of secondary uranium minerals, high-resolution analyses of trance elements distributed in original and secondary uranium minerals using laser microprobe analyzer, composition of underground water, simulation experiments.

系统地总结了天然类比研究的现状，包括沥青铀矿与UO2的可比性、沥青铀矿风化产物的共生组合和共生次序、沥青铀矿及其风化产物的化学成分特征、沥青铀矿风化过程中类比元素的迁移性等；并初步指出了进一步研究的方向，如铀酰矿物的微结构研究、类比元素在沥青铀矿和铀酰矿物中分布的激光探针研究、地下水成分分析、模拟实验等。

The ore minerals consist mainly of pitchblende UO(superscript x, x=2.16~2.70. The pitchblende is mainly intergrown intimately with diagenetic minerals, parts of which is intergrown with authigenic kaolinite, while another parts of which is intergrown or juxtaposed with pyrite of ore-stage, indicating simultaneous precipitation.

镜下观察结果显示，铀矿物主要为沥青铀矿UO(下标 x， x=2.16~2.70，部分与自生高岭石共生，部分则紧密地与矿化阶段黄铁矿共生或交互生长，表明同时沉淀。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了