扬子陆块区东南缘碳硅泥岩型铀矿床与断陷红盆控矿机制

Ore-controlling mechanism of down-faulted red basins over carbonaceous-siliceous-pelitic rock type uranium deposits at the southeastern margin of Yangtze continental block

扬子陆块区东南缘是碳硅泥岩型铀矿床的重要矿集区,其中沉积-外生改造型和沉积-热液叠加改造型铀矿床均分布在断陷红盆边缘或附近。通过红盆与碳硅泥岩型铀矿床分布规律的研究,提出了碳硅泥岩型铀矿床与红盆边缘断裂的沟通效应和控矿机制,旨在强调红盆在找矿实践中的权重。

One of the important ore-concentrated areas of carbonaceous-siliceous-pelitic rock type uranium deposits is the southeast continental margin of Yangtze plate. Sedimentary-exogenous transformation type and sedimentary-hydrothermal superimposed transformation type uranium deposits are always distributed at or near the edge of down-faulted red basins. By analyzing the relation of deposit distributions to down-faulted red basins, the connective effect and ore-controlling mechanism of carbonaceous-siliceous-pelitic rock type uranium deposits are proposed with marginal fractures of red basins in the paper.