摘要
黔北务正道地区是贵州重要的铝土矿成矿区。研究表明,铝土矿产于中下志留统韩家店组(S1-2hj)页岩或上石炭统黄龙组(C2h)灰岩侵蚀面上,含矿层位为中二叠统梁山组(P2l),赋矿围岩主要为炭质页岩和铝土质页岩。铝土矿床形成于河湖沼泽沉积环境,分布严格受NE向向斜构造控制,矿层连续性好、埋藏大,矿石品位高、铝硅比高。矿床成因属古风化壳沉积型。
Wuehuan-Zheng＇an-Daozhen region is an important bauxite mineralizing area. It is shown that bauxite ores occur in shale of lower middle Silurian Hanjiadian formation （ S1.2hj） , or on the limestone erosion surface of upper Caroniferous Huanglong formation （C2h）. Ore-controlling strataare middle Permian Liangshan formation （P2l）, and hosting rocks are carbonaceous and allitic shale. Bauxite ores with fine continuity, thick embedding, higher ore content and high A1/Si, are formed in the lake and stream sedimentary environment, and strictly controlled by NE synclinal structure. The deposits belong to paleo-weathering crust sedimentary type.
出处
《地质与勘探》
CAS
CSCD
北大核心
2008年第6期31-35,共5页
Geology and Exploration
关键词
铝土矿床
成矿规律
黔北
bauxite, metallogenic regularity, northern Guizhou province.
