Grade-Tonnage Models for the Phosphate Deposits in Guizhou Province and Their Geological Significance
详细信息
- 责任者：Wu Bo (Guizhou Academy of Geologic Survey ; Guiyang 550004 ; China) ; Deng Keyong
- 刊名：Geology and Prospecting
- 出版年：2013
- 卷期：49(2)
- 关键词：磷矿床 ; phosphate deposit ; 矿石品位 ; ore grade ; 贵州 ; Guizhou Province
- 页码：p.250-256
- 图表：illus., 4 tables, 13 refs.
- 分类号：1002
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
Based on the phosphate deposit database in Guizhou compiled in 2009,this study calculates the average grade of the phosphate ores using block grade and block reserve data taking the verified blocks as units.We determine the phosphate ores distribution of high,middle and low grades,make statistics of their tonnage frequency,and establish grade-tonnage models for the Cambrian and Sinian phosphate rock layers.The results show that the average grade for ores from the Cambrian phosphate rock layers is lower than the Sinian layers.The frequency of their tonnage obeys a normal distribution,and the tonnage peak interval is much narrower in phosphate rock layers than the Sinian layers.The study indicates that the Kaiyang-Xifeng and Weng’an-Fuquan areas can be considered as the key areas of development and utilization,and the mineral separation technology should be improved to solve the problems of low grade,poor quality but big resource reserve of phosphate ores in the Tongren-Songtao and Qingzhen-Zhijin areas.
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