云南哀牢山构造带仰宗流纹斑岩锆石U-Pb年龄、地球化学特征及其构造意义

摘要

This paper presents bulk petrogeochemistry and zircon U-Pb dating results for the Yangzong rhyolite porphyry in Luchun County, Yunnan Province. LA-ICP-MS zircon U-Pb dating results show that the Yangzong rhyolite porphyry was formed in the Late Permian (263.1±2.3Ma). The Yangzong rhyolite porphyry is characterized by SiO2 content of 71.08%~80.26%, alkali (Na2O+K2O) 4.67%~8.67%, and Na2O