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LA-ICP-MS zircon dating of the alkaline rocks and lamprophyres in Gejiu area and its implications
Author(s): 
Pages: 1138-1149
Year: Issue:  6
Journal: Geology in China

Keyword:  碱性岩煌斑岩LA-ICP-MS动力学背景个旧云南;
Abstract: 笔者报道了运用LA-ICP-MS锆石U-Pb方法对云南个旧地区碱性岩侵入年龄和煌斑岩的测年结果,即白云山碱性岩的形成时代为76.6±3.6Ma.煌斑岩的形成时代为77.2±2.4 Ma,这两种类型的岩石均为燕山晚期岩浆作用的产物.结合区域地质地球物理资料、岩石学组合的构造指示意义及前人的有关其他研究成果,认为这些岩石形成于岩石圈伸展的动力学环境.
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