摘要
该类矿床的形成受潟湖相环境、断陷构造、古水文与古气候的联合控制。在某些地区,地热对成矿有重要影响。矿床分为淋积型和淋积-热液叠加型。文中论述了其成矿机理,指出成矿物质主要来源于含矿地层,有时花岗岩也是一个重要来源。
This paper deals with the geological conditions, mineralization characteristics, genetic types and time-space distribution of the Devonian-Carboniferous strata-bound carbonate-type uranium deposits in South China. These ore deposits are genetically classified as the leaching type and the leaching-hydrothermal superimposed type. The formation of the ore deposits is controlled by a combination of such factors as stratigraphic-lithofacics, structure, paleohydrogeology and paleoclimate. These ore deposits are confined mainly to the strata (C2-3, C) of platform-lagoon carbonate facies. Unique tectonic settings are a vital factor leading to the formation of these uranium deposits. In other words, they occur in the second-order fault depression belt of an uplift region located in the Late Cretaceous tension zone in eastern China. A metallogenetic model for these uranium deposits has been proposed, and the ore-forming materials are thought to have come mainly from ore-bearing strata themselves and, in part, from uranium-rich granites around the orebodies.
出处
《地球化学》
CAS
CSCD
北大核心
1989年第2期121-130,共10页
Geochimica
