云南中甸地区雪鸡坪同碰撞石英闪长玢岩锆石SHRIMP U-Pb定年及其意义

林清茶; 夏斌; 张玉泉

林清茶, 夏斌, 张玉泉. 2006: 云南中甸地区雪鸡坪同碰撞石英闪长玢岩锆石SHRIMP U-Pb定年及其意义. 地质通报, 25(1): 133-137.

引用本文:

林清茶, 夏斌, 张玉泉. 2006: 云南中甸地区雪鸡坪同碰撞石英闪长玢岩锆石SHRIMP U-Pb定年及其意义. 地质通报, 25(1): 133-137.

2006: Zircon SHRIMP U-Pb dating of the syn-collisional Xuejiping quartz diorite porphyrite in Zhongdian, Yunnan, China, and its geological implications. Geological Bulletin of China, 25(1): 133-137.

Citation:

2006: Zircon SHRIMP U-Pb dating of the syn-collisional Xuejiping quartz diorite porphyrite in Zhongdian, Yunnan, China, and its geological implications. Geological Bulletin of China, 25(1): 133-137.

云南中甸地区雪鸡坪同碰撞石英闪长玢岩锆石SHRIMP U-Pb定年及其意义

Zircon SHRIMP U-Pb dating of the syn-collisional Xuejiping quartz diorite porphyrite in Zhongdian, Yunnan, China, and its geological implications

摘要

摘要: 对金沙江缝合带东侧雪鸡坪同碰撞石英闪长玢岩进行了岩石学、岩石化学、稀土元素、锆石SHRIMP U-Pb定年等研究,石英闪长玢岩锆石SHRIMP U-Pb年龄为215Ma.结合前人的资料,认为金沙江洋盆闭合、板块碰撞的时间应为266Ma,碰撞阶段的年龄范围为266～215Ma.对无老核的岩浆型锆石的形成条件、结构简单的典型纯岩浆型锆石定年的测试点数量等方面也进行了讨论.

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