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滇西北白马雪山和鲁甸花岗岩基SHRIMP U-Pb年龄及其地质意义 被引量:58

SHRIMP Dating of Baimaxueshan and Ludian Granitoid Batholiths, Northwestern Yunnan Province, and Its Geological Implications
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摘要 应用SHRIMP方法对滇西北2个花岗质岩基——白马雪山和鲁甸花岗岩进行同位素地质年代学研究。研究表明,白马雪山花岗闪长岩的侵位年龄为239±6 Ma,鲁甸黑云母二长花岗岩为214±6 Ma。这一研究为解决金沙江地区的碰撞造山事件的时代问题提供了同位素地质年代学依据。 SHRIMP U-Pb ages are reported for the Baimaxueshan and the Ludian granitoid batholiths in northwestern Yunnan Province. The Baimaxueshan granodiorite intruded at 239 ± 6 Ma, whereas the Ludian biotite monzonite granite, 214 ± 6 Ma. These data provide geochronological evidence for the collisional events of Jinshajiang area.
出处 《地球学报》 EI CAS CSCD 北大核心 2003年第4期337-342,共6页 Acta Geoscientica Sinica
基金 国家自然科学基金项目(49902005)的成果。
关键词 滇西北 花岗岩基 碰撞造山事件 SHRIMP年代学 granitoid batholiths collisional event SHRIMP northwestern Yunnan Province
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