摘要
六二一七铀矿床系产于燕山早期花岗岩内部的热液铀矿床。根据野外地质观察和室内分析研究确定,围岩蚀变序列为碱交代→云英岩化→红化→绿化→硅化→萤石化→碳酸盐化,矿石中铀以沥青铀矿和分散吸附状态两种形式存在,伴生的金属矿物主要为黄铁矿、赤铁矿、矿化类型为红化型、绿化型、硅质脉型、萤石脉型、碳酸盐脉型;产铀矿花岗岩的特点是铀含量较高且分布不均匀,富含晶质铀矿;蚀变作用使岩石中活动铀含量增高,从而有利于热液铀矿化的形成。
No.6217 uranium deposit is located in the contact of granitic bodies.On the basis of the field geologic investigation, microscopic study and inclusion thermometric data, it is determined that the wall rock alteration varies from alkali replacement→greisenization →redization→greenization→silicification→fluoritization→carbinatization; the uranium of the ore is in the form of both pitchblende and adsorbate, and accompanying metallic minerals are mainly pyrite and hematite.According to uranium,thorium and uranium-leaching analysis data along with the geologic characteristics, it is believed that uraniferous granite is a rock in which uranium content is higher, its distribution is not uniform and there is uraninite; the alteration increases active uranium content of the wall rock, which promotes for the hydrothermal uranium mineralization.
出处
《矿物岩石》
CAS
CSCD
1989年第1期109-115,共7页
Mineralogy and Petrology
