沥青铀矿

17&115℃沥青铀矿的合成及其形成速度的实验研究

A study on Synthesis of pitchblende in the temperature range of 17-115 ℃ and its crystallization speed

稀硫酸介质中沥青铀矿溶解动力学的探讨

Studies on dissolution kinetics of pitchblende in dilute sulphuric acid medium

沥青铀矿的结晶速度在不同的温度和pH条件下是不同的。

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

用NH4HCO3-（NH4）2CO3-H2O2溶液就地浸出沥青铀矿的数学模型

A mathematical model for in situ leaching of uraninite using nh_4hco_3 - ( nh_4 ) _2co_3-h_2o_2 solution

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 .

江西省大布铀矿床沥青铀矿特征

Characteristics of uraninite of Dabu uranium deposit in Jiangxi Province

8411矿床沥青铀矿特征及其成因意义

The Characteristics of Pitchblende from Uranium Deposit No.8411 and Their Genetic Significance

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 .

沥青铀矿的同位素年龄为108&109百万年。

The radiometric age of pitchblende is109 & 108 m.

沥青铀矿中氧同位素测定方法采用直接进样分析。

DIRECT DETERMINATION OF OXYGEN ISOTOPES IN PITCHBLENDE Direct sample injection method are adopted .

沥青铀矿三种结构的成因假说

Genetic hypotheses on three textures of pitchblende

某铀矿石属铀-磷灰石-绿泥石类型，除沥青铀矿外，氟磷灰石和绿泥石为主要含铀矿物，铀与氟磷灰石关系密切。与氟磷灰石密切相关的铀在现有加压碱浸条件下难以浸出。

The tested ore was of uranium-apatite-chlorite type in which fluorapatite and chlorite were the main uranium-bearing minerals .

8412铀矿床沥青铀矿的稀土和锶、钕同位素研究

A study of rare earth elements and sr , nd isotopic compositions of pitchblende in uranium deposit no.8412

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 .

沥青铀矿是矿石中唯一的原生铀矿物，其共生矿物主要有石英、萤石、赤铁矿和黄铁矿。

Pitchblende is the only primary uranium mineral , which is associated with quartz , fluorite , hematite and pyrite .

桂东北铀矿区各类型铀矿床中沥青铀矿的稀土元素分布模式的研究

The distribution pattern study of rare earth elements of pitchblende in three types of uranium deposits in Northeast Guangxi Province

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 .

铀钨矿床是一种新矿床类型。其主要矿物是白钨矿和沥青铀矿，它们既有共生，也有伴生。

This uranium tungsten ore deposit is a new type of mineral deposits , the main minerals in which are scheelite and pitchblende .

本文对570矿床的主要矿石矿物（沥青铀矿、钻石、钛铀矿及胶硫钼矿）的化学组成进行了研究。

The compositional characteristics of main ore minerals ( pitchblende , coffinite , brannerite andjordisite ) in Deposit 570 are described in this paper .

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 .

西北某铀矿床工业铀矿化主要以沥青铀矿为主，属可地浸工业铀矿物类型。

The mineralization of uranium at a uranium deposit , in Northwest of China , is mainly pitchblende , and it belongs to the leachable industrial uranium mineral .

下庄铀矿田是我国最大的花岗岩型铀矿田，其中的沥青铀矿方解石型矿化类型是近年来新发现的一种富矿类型。

The Xiazhuang uranium ore field is the biggest granitic-type uranium ore field in China , and the pitchblende-calcite mineralization type is a new type of high-grade ores .

Fe2+减少，而Fe3+增加，说明在成矿作用过程中（U02）2+与Fe2+发生反应，形成沥青铀矿和赤铁矿。

Fe2 + decreasing meanwhile Fe3 + increasing , in the mineralization process ( UO2 ) 2 + and Fe2 + reaction , formation of pitchblende and hematite . 3 .

三种类型铀矿床的沥青铀矿的稀土元素分布模式十分相似，这反映出它们形成的物理化学条件可能近似。

The distribution patterns of rare earth elements of pitchblende in three types of uranium deposits are very identical , reflecting that the pitchblende was formed under the same physicochemical conditions .

铀主要以显微浸染状铀矿物（沥青铀矿+铀石）形式散布于炭屑木质细胞腔内壁和砂岩碎屑颗粒的填隙物中，部分以吸附形式赋存于粘土矿物和炭屑；

Uranium mainly occurs in pitchblende and coffinite which are mainly dispersed in the fossil wood cells and pelitic cement of sandstone detrital grains , and partly adsorbed by clay minerals or carbonaceous debris .

其原因是，1.946Ga形成的铀矿物受到了1.829Ga混合岩化作用以及中生代活化作用的改造，使沥青铀矿重结晶，形成具有沥青铀矿假象的晶质铀矿。

The reason for this is that the uranium minerals formed at 1946 Ma experienced migmatization at 1829 Ma and the transformation of remobilization during Mesozoic period giving rise to the recrystallization of pitchblende and the formation of uraninite with pseudomorph of pitchblende .

对主要以沥青铀矿形式存在的某硅酸盐铀矿石，用二氧化锰作氧化剂，硫酸高铁溶液作浸出剂进行淋滤浸出研究。

The trickle leaching process for a high grade silicate uranium ore existing mainly as uraninite form has been studied . Two stage counter current trickle leaching with manganese dioxide as oxidant and ferric sulphate solution as leaching agent is used in the process .

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。

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 .

与古岩溶有关铀矿床则出现典型低中温热液矿物组合，矿化脉体期次分明，矿石中铀基本呈可见状沥青矿存在，沥青铀矿具有热液成因标型。

The features of paleokarst related U deposits are : with a typical low middle temperature hydrothermal mineral association and obvious stages of mineralizing veins , and the uranium mainly in pitchblende that has the typomorphic characteristics of hydrothermal genesis .