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宁夏海原县南华山花岗闪长岩锆石SHRIMP U-Pb测年及形成时代厘定

MENG Fang,WANG Cheng,LI Haifeng

Ningxia Engineering Technology（2012）

Cited 23|Views5
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Abstract
通过最新锆石SHRIMP U-Pb测年,获得了南华山花岗闪长岩3组新的同位素测年资料,即乱堆子岩体、油房院岩体、石洼里岩体的形成年龄分别为(431±5)Ma,451+54-32Ma,(437±5)Ma.认为这3个岩体均为加里东构造运动的产物,具成因联系,属同一个岩浆序列.其中,油房院岩体侵位略早,形成时代为晚奥陶世,乱堆子岩体和石洼里岩体侵位较晚,形成于早志留纪.
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Key words
formation age,SHRIMP U-Pb dating,granodiorite,Nanhuashan
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