摘要
为深入研究辽宁盖州四张磙子花岗岩的形成时代、地质特征及意义,通过锆石LA-ICP-MS U-Pb定年系统和X射线荧光光谱仪,对四张磙子花岗岩进行年龄测试和主微量元素分析.锆石定年结果表明,四张磙子花岗岩侵位年龄为(1 871.2±9.3)Ma,属于古元古代产物.主微量元素结果表明,四张磙子花岗岩与矿洞沟正长岩及闪长岩的Si O2与K2O及Na2O基本呈现正相关,与Ti O2,Al2O3,TFe2O3,Ca O,Mg O,M n O呈负相关,表明3种岩体可能具有亲缘关系.结合前人研究,认为四张磙子花岗岩与矿洞沟正长岩、闪长岩可能具有同一岩浆来源,四张磙子花岗岩为古元古代侵位的花岗岩体.
To better understand the formation age, geological features and significance of the Sizhanggunzi granite in Gaizhou,Liaoning Province,formation age and major trace elements were studied by zircon LA -ICP-MS U - P b dating system and X-ray fluorescence spectrometers. Zircon U-Pb dating yielded the emplacement age of （1 871. 2 ±9. 3 ）Ma,which indicates Sizhangguanzi granite is the product of Paleoproterozoic magmatism in Gaizhou. The results of major trace element testing on the target granite revealed the Sizhanggunzi granite and Kuangdonggou intrusions all intruded in Paleoproterozoic. In the Sizhanggunzi granite and syenite and diorite in Kuangdonggou reigon, Si02 had a relevant positive correlation with K2O and Na2O and good negative correlations with TiO2, Al2O3 , TFie2O3, CaO, MgO and MnO. This also represent the three intrusions probably have genetic relationship. Combining with previous studies, this study indicates Sizhanggunzi granite intruded in Paleoproterozoic and evolved from the identical magma of Kuangdonggou syenite and diorite.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第9期1349-1352,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金青年基金资助项目(41502093)
中国地质调查局项目(12120113058700)
