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- Title
广西平果沉积型铝土矿Ga的分布特征与沉积环境关联性探讨.
- Authors
密静强; 陈远荣; 于浩; 张宏; 凌尔仲; 王延俊; 杜佳云; 邓明华
- Abstract
The Pingguo area in (Jiangxi Province has considerable reserves of sedimentary bauxite of the Upper Permian Heshan Formation which are characterized by the occurrence of associated dispersed element (;a (gallium). It is of great significance to study the geochemical characteristics and depositional environment of the sedimentary7 bauxite and their correlation with (}a in the deposit on the basis of major and trace element analyses・ This research helps to improve the comprehensive recovery and utilization of bauxite, and also to increase the economic values of the deposit・ The contents of major and trace elements, including the (;a concentrations, were measured in 18 different types of ores and bauxite samples which were collected in the study area* The results calculated by statistical method and analyzed by correlation diagram show that the average content of (;a in the samples reaches the industrial grade ((L 0()2x 1()~2), but the enrichment degree of (}a in different ore types accords with the regular rule of oolitic bauxite >dense massive bauxite >aluminous rock・(;a shows a significantly positive lower correlation with Al2()3, but a significantly negative correlation with Si()2, In addition, the (;已 concentrations show a slightly positive lower correlation with V and Zr, and no significant correlation with rare earth elements. Based on the analyses of the paleo-geo graphic environment, Sr/Ba ratios, (;a enrichment and LREE/HREE ratios of different types of samples, this study suggests a costal to shallow marine facies with a relatively stable, acidic and humid climatic condition during the main metallogenic period of the sedimentary bauxite in the Pingguo area* Moreover, an oxidation environment of the coastal facies during the early deposition of the Upper Permian Heshan Formation was gradually transformed into a reducing, shallow marine facies during the late deposition of the Upper Permian Heshan Formation. Correspondingly, the ore type changed from the purplish red, dense massive mineralization to lime gray to grayish dark, oolitic mineralization.
- Subjects
JIANGXI Sheng (China); GUANGXI Zhuangzu Zizhiqu (China); TRACE elements; BAUXITE; RARE earth metals; FACIES; GALLIUM; ORES; MINERALIZATION
- Publication
Journal of Geomechanics, 2022, Vol 28, Issue 3, p417
- ISSN
1006-6616
- Publication type
Article
- DOI
10.12090/j.issn.1006-6616.2021090