Relationship between Basal Paleogeomorphology and Bauxite Ore Quality in the Wuchuan-Zheng’an-Daozhen Area: An Example from the Dazhuyuan Bauxite Ore Deposit
详细信息
- 责任者：Weng Shenfu (106 Geological Party ; Guizhou Geological Mineral Exploration Development Authority ; Zunyi 563000 ; China) ; Lei Zhiyuan
- 刊名：Geology and Prospecting
- 出版年：2013
- 卷期：49(2)
- 关键词：铝土矿 ; bauxite deposit ; 贵州 ; Guizhou Province
- 页码：p.195-204
- 图表：illus., 1 table, 19 refs.
- 分类号：1001
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
Taking the Dazhuyuan bauxite ore deposit in the Wuchuan-Zheng’an-Daozhen area, Guizhou Province as an example, this paper studies the lithofacies and paleogeography and the relationship between basal palaeogeomorphology and bauxite ore quality. The bauxite ores in the Wuchuan-Zheng’an-Daozhen area are controlled by the sedimentary environment, and are distributed in lakeshore facies, delta facies and shallow lacustrine environments. The bauxite ore quality from the shallow lacustrine environment is the best, and that from the lakeshore facies, delta facies follows. The ore-bearing rock series occurs on the geomorphology of basal shale or carbonate peneplain, and the bauxite ore quality is controlled by material supply and the sedimentary environment, and is also closely related to the geomorphological characteristics of the peneplain. In the low areas of ancient landforms of the basement, the content of Al2O3 is high, with high Al-Si ratios. The ancient basement terrain, including pit form, size and its depth, exerts a key control on the distribution, occurrence, grade and scale of the bauxite orebodies.
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