摘要
8411矿床是一个以岩浆期后热液作用为主的复合成因铀矿床,它在空间上和成因上与某同熔型石英正长岩、花岗岩侵入体有关。该矿床中的沥青铀矿具有反映其形成条件的某些标型特征。本文研究了该矿床沥青铀矿的产出特点、标型特征及其成因意义。
In this paper systematic data oil morphological characteristics,physical and optical properties,chemical composition,thermal properties and trace ele-ment geochemistry axe given for pitchblende from uranium deposit No.8411.The pitchblende occurs in the form of grapeform and reinform.Its association minerals are mainly the various sulfides of Fe,Cu,Pb,Zn,Ni,Co,Mo,magnetite,microquartz,ankerite and calcite etc..The pitchblende always replaces pyrite,galena,sphalerite,chalcopyrite and so on.Reflective power of the pitchblende is 11.98%-14.92%(in green light),10.12%-12.51%(in red light).Microhardness V_(120)is 504-760.5kg/mm^(2).Specific gravity is 7.583-7.721.Unite cell a_(0)is 5.436 A-5.420 A-The D.T.A curve has a weak exothermic peak at 450-490℃-It is rich in ca,As,Ba,V.The pitchblende is formed between 200-170℃.The geneses of texture of the ore and the pitchblende are discussed.These features support a composite genesis of the uranium deposit and can,be regarded as typomorphic for pitchblende from the uranium deposits related to syntectic type granite intrusive bodies.Some of the uranium and other metallic elements of this deposit are mainly differentiated from the quartz-syenite magma.The others are drawn from the host rock.
出处
《岩矿测试》
CAS
1985年第3期225-230,I0005,I0006,I0007,共9页
Rock and Mineral Analysis
