摘要
670矿床是典型的火山岩型富铀矿床,具有多期成矿特征。主要成矿期可分为两期。早成矿期矿化主要和红化有关,成矿溶液主要由大气降水组成,其中铀主要以UO_2(CO_3)_2^(2-)形式存在(99.6%),矿化温度133℃(平均值),成矿时代131Ma;晚成矿期成矿溶液主要为岩浆水,铀以UO_2(CO_3)^(2-)(89.4%)和UO_2(SO_4)_2^(2-)(9.2%)形式存在,矿化温度239℃(平均值),成矿时代为106.3±2.1Ma.670富铀矿床的形成是两期成矿作用叠加、多种因素复合作用的结果。
The 670-uranium deposit is a typical rich volcanogenic uranium deposit with
the characteristics of multistage mineralization.The development process can be
divided into two main minerization periods,The first one is characterized by the
red minerization,and the ore-forming solution is mainly of meteoric water in
which the existing form of uranium is[UO_2(CO_3)]^(2-) (99.6%),the ore-forming
temperature is around 133℃,and the metallogenic age is 131 Ma.In the second
minerilization period,the ore-forming solution consists of magmatic water,in
which[UO_2(CO_3)]^(2-)(89.6%)and[UO_2(SO_4)]^(2-) are the major forms of uranium,
the metallogenic temperature is around 239℃(average),and the metallogenic age
is 106.3 Ma.
The formation of rich 670-uranium deposit is the result of multistage miner-
alization and the joint action of various factors.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
1991年第2期140-148,共9页
Acta Scientiarum Naturalium Universitatis Sunyatseni
关键词
矿床
多期成矿
控矿因素
富铀矿床
multistage mineralization
ore-controlling factors
rich uranium deposit
