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某铀矿床在空间上与一海西期花岗岩体伴生。矿体呈透镜状、似层状,成矿围岩为中泥盆统碳酸盐岩。铀矿化年龄为65.0±O.6百万年、59.2±O.6百万年和30.7±O.6百万年,远较花岗岩体(283.3±14百万年)和围岩(约40o百万年)年轻。成矿温度100°—300℃。本文详细地讨论了该矿床的成矿历史。研究结果表明,该矿床的铀成矿演化过程可分为四个阶段(图5):(1) 围岩沉积时铀的原生弱富集(386—368百万年期间),(2)热变质时围岩中铀的活化转移、增值(283.3±14百万年);(4)铀的表生吸附(140—65百万年期间);(4)热液叠造成矿(65.0—30.7百万年期间)。
A uranium deposit is spatially associated with a Hercynian granite mass. The ore body is lenticular, stratified and the metallogenetic rock is of the Middle Devonian carbonate rock. The age of uranium mineralization is 65.0 ± 0.6 million years, 59.2 ± 0.6 million years and 30.7 ± 0.6 million years, far more than the granite body (283.3 ± 14 million years) and the surrounding rock (about 40 ° Millions of years) young. Mineralization temperature 100 ° -300 ℃. This paper discusses in detail the metallogenic history of this deposit. The results show that the ore-forming process of uranium mineralization in this deposit can be divided into four stages (Fig. 5): (1) primary weak enrichment of uranium during the deposition of surrounding rocks (386-368 million years), (2) Activation and transfer of uranium in surrounding rocks during metamorphism (283.3 ± 14 million years); (4) Adsorption of uranium on epiphytes (140-65 million years); (4) Accumulation of hydrothermal deposits (65.0-30.7 Millions of years).