line-level: 2" class=MsoNormal>Variation of Jiama Skarn Copper-Polymetallic Body in
详细信息
- 责任者：Zheng Wenbao (Chengdu University of Technology ; Chengdu 610059 ; China) ; Li Fengji
- 刊名：Geological Bulletin of China
- 出版年：2010
- 卷期：29(10)
- 关键词：铜矿 ; copper ores ; 多金属矿 ; polymetallic ores ; 西藏 ; Tibet
- 页码：p.1486-1494
- 图表：6 illus., 3 tables, 18 refs.
- 分类号：1001
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
In this paper, putting the skarn-type ore body as the research object, according to the semi-variogram analysis of main internal symbol ore-grade in ore-body and establishing a corresponding spherical model, the authors get many parameters, as lag distance, nugget, variable-range, for the mainly variable directions of ore body. According to these parameters, the variation coefficients at every aspect of main elements, such as copper and molybdenum, in its copper-molybdenum ore body, are both 0.45. It indicates that both the main elements and the symbiotic elements in copper-molybdenum ore body have obvious coordinate changes in the direction of strike, tendency and vertical. It indicates that the ore’s grade change degree is extremely complex in the ore body. The variation coeffient values of copper and molybdenum are both between 0.6 and 0.8 in the direction of vertical, showing their extent of changes are medium. And the lead and zinc’s are between 0.3 and 0.6, showing that their degree of changes are relatively simple.