铀矿大型矿集区与成矿作用

大型矿集区的形成，是在地质历史演化进程中，多矿种大矿量超常聚集的结果。不同的矿集区有不同的典型矿种和典型矿床。本文仅以铀矿为例，在世界范围内厘定出14个铀矿大区矿集区。本文研究铀矿大型矿集区时空分布规律与地球动力学演化的关系，在此基础上探讨了铀矿大型矿集区元素超常聚集规律，提出多矿种“点区超常聚集”和“短时限爆发成矿”特征。本文按照“源、运、积”3个环节，探讨铀矿大型矿集区的成矿作用，其中有关深源成矿、特殊碱质流体的水岩反应以及元素沉积环境的研究，为建立铀矿大型矿集区的找矿模式奠定基础。

Large ore-concentrated area of uranium deposits and uranium metellogeny

The formation of large ore-concentated are results from the anomalous concentration of multi-mineral resources and large amount of ore materials during the process of geologic evolution history. Different ore-concentrated areas are characterized by different typical mineral resources and typical ore deposits. This paper, taking uranium deposit as on example, recognizes 14 large ore-concentrated areas of uranium deposit in the world, and studies the time-space constraints of large ore-concentrated areas of uranium deposits and their relation with geodynamic evolution, and on the above basis, discusses the unusual concentration of ore elements in large ore-concentrated areas of uranium deposits, as well as proposes the characteristics of “unusual concentration in certain points and areas” and “explosion metallogeny in a short period of time” of multiple mineral resources. According to the three basic “links”, i.e. “source, transportation and precipitation”, this paper proposes the metallogeny of large ore-concentrated areas of uranium deposits. Of them, the study on the deep-source metallogeny, water-rock intereaction of special alkaline fluid and precipitation environment has made a fundation for the establishment of prospecting model of large uranium ore-concentration arcas.