中山大学学报（自然科学版）2016，Vol.55Issue(5)：108-118,11.DOI:10.13471/j.cnki.acta.snus.2016.05.019
贵州镇远钾镁煌斑岩原生及砂矿金刚石矿物学特征及其找矿意义
Mineralogical characteristics of lamproite-hosted and placer diamonds from Zhenyuan, Guizhou and their significance for primary deposit prospecting
摘要
Abstract
There has not been an agreement reached for a long time on the occurrence,host rocks and genesis of primary diamond deposits beneath the Yangtze Craton,China.In this paper,the surface fea-tures and FTIR of 1 99 macro diamonds from lamproite rocks and 1 6 diamonds from the surrounding river basins in Zhenyuan collected by No.1 01 Guizhou Geological Brigade were studied by non-destructive techniques including FTIR spectroscopic techniques,aiming at finding out valuable geological prospecting information /indication.The results showed that most primary diamonds are small in size and fragment-ized,and are characterized by strong dissolution features or attaching materials on surface.Most dia-monds display blue-white fluorescence other than phosphorescence.FTIR results confirmed the majority of the diamonds are type IIa,but their proportion is less than previous estimation and observation.Com-pared with Hunan and Guizhou placer diamonds,it is believed that the host lamproite rocks of the prima-ry diamonds in Zhenyuan is not the primary source of those placer diamonds discovered in Guizhou and Hunan provinces.Based on field survey and research of the geological occurrence,it is concluded that lamporite rocks in Zhenyuan may be shallow phase rather than deep root phase,implying it has the poten-tial to discover new primary diamond deposits in Guizhou.关键词
原生金刚石/钾镁煌斑岩/找矿/扬子克拉通/贵州Key words
primary diamonds/lamporite/exploration/the Yangtze craton/Guizhou province分类
天文与地球科学引用本文复制引用
黄远成,李志翔,丘志力,饶红娟,陆太进,陈华,柯捷,魏然..贵州镇远钾镁煌斑岩原生及砂矿金刚石矿物学特征及其找矿意义[J].中山大学学报（自然科学版）,2016,55(5):108-118,11.基金项目
国家自然科学基金资助项目（41272086；41473030）；国土资源部公益性行业科研基金资助项目 （）
