• 责任者：Lin Weipeng (Department of Earth Sciences ; Sun Yat-Sen University ; Guangzhou 510275 ; China) ; Qiu Zhili
• 刊名：Acta Scientiarum Naturalium Universitatis Sunyatseni
• 出版年：2011
• 卷期：50(3)
• 关键词：钾镁煌斑岩 ; lamproite ; 锆石矿床 ; zircon deposit
• 页码：p.105-111
• 图表：5 illus., 1 table, 27 refs.
• 分类号：0600
• 出版序号：20120116
• issnNo：ISSN0529-6579
• isbnNo：CN44-1241/N

Heavy mineral zircons were separated from diamondiferous lamproites and their associated rocks in Ningxiang and nearby area, Hunan Province, and their main and trace element compositions, interior structure and the U-Pb isotopic ages were obtained with EPMA, cathodoluminescence microscope and LA-ICPMS measurement. The zircons in lamproites from different locations generally have similar geochemical characteristics. The U-Pb dating of zircons suggests that the lamproites were probably formed during multi-stages. A young age of (101.6±5.1)Ma was obtained on four zircon samples from No.1 and No.3 pipe lamproites. The zircon collected from the Cretaceous red strata in Shangwutong area has a concordant ²⁰⁷Pb/ ²⁰⁶Pb age of (2 008±29) Ma. The results cannot specifically determine the source rocks of diamond in the study area.