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马鞍肚铀矿床赋存于岩溶发育的泥盆系灰岩中,尤其它的部分矿体产于古岩溶角砾岩带中。本文在论述该矿床中角砾岩的古岩溶成因特征,以及将该矿床与岩溶矿床的特征进行对比后认为,马鞍肚铀矿床不属岩溶矿床,古岩溶构造仅为该矿床的成矿作用提供部分储矿空间,另外古岩溶作用也拓宽了灰岩中原有的断裂、裂隙,并使之成为良好的导矿构造。近代岩溶曾部分地改造了该矿床中的早期铀矿体。
The saddle-stratum uranium deposits occur in Devonian limestone with karst development. In particular, some of its ore bodies are produced in ancient karst breccia belt. In this paper, the paleokarst genetic characteristics of breccia in this deposit are discussed, and the characteristics of this deposit are compared with those of karst deposits. It is concluded that the saddle-belonged uranium deposit is not a karst deposit and the palaeokarst structure provides only the mineralization of this deposit Part of the ore storage space, another paleokarst also broadened the limestone in the original fracture, fissure, and make it a good guide structure. Modern karst has partially transformed the early uranium ore bodies in this deposit.