黔北德江地区中二叠世早期梁山组铝土矿含矿岩系特征及成矿规律

通过对黔北德江地区梁山组铝土矿野外地质特征、岩石地球化学特征、沉积特征进行研究，探讨了本区铝土矿含矿岩系沉积特征、沉积环境及成矿规律，预测铝土矿找矿靶区。研究表明，黔北德江地区铝土矿矿体赋存于沙沟向斜与红坳向斜两翼及核部的梁山组中，其形成的沉积环境为沼泽化瀉湖相，成矿物质来源可能为下志留统秀山组泥质砂岩。德江—沿河一带满足铝土矿成矿的相关条件，具有良好的成矿潜力，为新的铝土矿找矿靶区。文章在野外工作基础上总结的成矿规律和成矿模式，为今后的找矿工作提供了理论指导。

Characteristics of ore-bearing rock series and metallogenic regularity of bauxite of Liangshan Formation in Middle Permian Dejiang area, northern Guizhou Province

By studying the field geological characteristics, rock geochemical characteristics and sedimentary characte-ristics of the Liangshan Formation bauxite in Dejiang area, northern Guizhou Province, this paper discusses the sedimentary characteristics, sedimentary environment and metallogenic regularity of the Liangshan Formation in Dejiang area, and predicts the ore-prospecting direction of bauxite. The results show that all the bauxite orebodies in Dejiang area occur in Liangshan Formation in the flanks and core of Shagou syncline and Hong''ao syncline, and the sedimentary environment of bauxite seems to have been bog lagoon facies, with the mineral origin being probably argillaceous sandstone of Xiushan Formation of the lower Silurian. Dejiang-Yanhe area can meet the re-levant conditions of bauxite mineralization, has good mineralization potential, and is a new prospecting target area for bauxite. The metallogenic regularity and metallogenic model summarized in the field provide theoretical guidance for future prospecting.