地质科学2024，Vol.59Issue(6)：1603-1613,11.DOI:10.12017/dzkx.2024.111
铝土岩差异性淋滤模式及古环境分析:以鄂尔多斯盆地陇东地区为例
Analysis of different leaching patterns and paleo‑environment of bauxite rocks:A case study of Longdong area,Ordos Basin
摘要
Abstract
In order to study the leaching characteristics of bauxite in Ordos Basin and explore the paleo⁃environmental basis for its development,this paper selected Taiyuan Formation bauxite in Longdong area as the research object and analyzed the leaching model and paleo⁃environmental basis of bauxite in North China plate through microscopic observation and combining with the lithology characteristics.The results show that the physical properties of bauxite rock in the study area are greatly improved under the action of underground water leaching.The leaching dissolution diagenesis of bauxite rock has undergone three stages of deposition,supergene and burial,and has a three⁃stage differential leaching dissolution diagenesis model in the vertical direction,and the central part is most affected by leaching transformation.The favorable factors for the formation of bauxite in North China platform are the coupling of warm tropical climate,paleo⁃uplift slope area,paleo⁃karst landform and alternating rise and fall of sea level.Therefore,the bauxite in Ordos Basin has a good paleo⁃environment and has been found in many parts of the basin as far as the North China plate.The bauxite with good reservoir quality is mostly formed in the relatively high part of the structure,and the slope is a favorable development area.关键词
铝土岩/差异性淋滤溶蚀/古环境/陇东地区/华北板块/鄂尔多斯盆地Key words
Bauxite/Differential leaching solution/Paleo⁃environment/Longdong area/North China platform/Ordos Basin分类
天文与地球科学引用本文复制引用
张涛,张金功,宋世骏,周国晓..铝土岩差异性淋滤模式及古环境分析:以鄂尔多斯盆地陇东地区为例[J].地质科学,2024,59(6):1603-1613,11.基金项目
中国石油"十四五"前瞻性基础性重大科技项目的外协项目"不同类型致密气成藏机理与富集规律研究"(编号:ZY22⁃XA705⁃TPFW727)资助 （编号:ZY22⁃XA705⁃TPFW727）
