沥青铀矿中的初始铅属地壳放射成因。
The initial lead in pitchblende belongs to radioactive origin from crust.
铀矿物主要为沥青铀矿，形成于早元古代。
Uranium mineral is pitchblende which was formed in Lower Proterozoic.
沥青铀矿的同位素年龄为108—109百万年。
在酸性溶液中沥青铀矿结晶速度快，中性中较慢，碱性中最慢。
The highest speed was obtained in acidic medium, while in neutral medium the speed was relatively slow and the lowest speed was in alkaline one.
比如，含75％氧化铀的某种沥青铀矿物质的放射性是铀氧化物放射性的4倍。
Thus, certain pitchblendes containing 75% of uranium oxide are about four times as radioactive as this oxide.
尤其有一部分具有胶状构造外表特征的沥青铀矿样品的各项参数均与晶质铀矿一样。
Particularly part of pitchblende samples with colloidal structure features have the same physical and optical features as uraninite.
该文研究了桂东北地区三种不同类型铀矿床中沥青铀矿及其围岩的稀土元素分布模式。
The distribution patterns of rare earth elements of pitchblende and surrounding rocks in three types of uranium deposits have been studied.
原生型矿床中主要铀矿物是晶质铀矿，改造型矿床中的主要铀矿物是沥青铀矿和残余的晶质铀矿。
The principal uranium mineral in the deposits of primary subtype is uraninite, but in reworked subtype are pitchblende and relict uraninite.
四年的辛勤工作和提炼了大量的沥青铀矿，玛丽和她的丈夫终于看到了发出暗蓝色微光的新元素——镭。
After four years' hard work and refinement of tons of pitchblende, Marie and her husband at last saw the dim blue light of the new element-radium.
这些冰河沉积物下方的较老岩层，是沥青铀矿与黄铁矿碎屑；这两种矿物被认定为大气中氧气极为稀少的证据。
In the older rocks below these glacial deposits are detrital uraninite and pyrite two minerals considered evidence for very low levels of atmospheric oxygen.
在沥青沥青铀矿矿中提炼和测量出各种各样的物质的工作是非常繁重、肮脏和单调乏味的，但是玛丽于1898年发现了两个新的放射性元素：其中的一个，她根据祖国波兰的名称，称此元素为钋，她命名第二个所发现的元素为镭。
It was heavy, dirty, and tedious work to separate and measure the various substances, but Marie was able to discover two in 1898. She named one substance polonium, after her motherland of Poland.
天然有机质及其与铀矿化的关系 天然有机质在地质体中常见者主要是腐植质、煤、泥炭、腐泥质、石油和沥青。
The nature and origin of organic substances in uranium deposits and the role that they plays in transporting and concentrating uranium are different from place to place.
天然有机质及其与铀矿化的关系 天然有机质在地质体中常见者主要是腐植质、煤、泥炭、腐泥质、石油和沥青。
The nature and origin of organic substances in uranium deposits and the role that they plays in transporting and concentrating uranium are different from place to place.
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