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地质论评  2001 

佛子岭岩群中的晋宁期深成岩带及其构造含意

Keywords: 佛子岭岩群晋宁期变形花岗岩岩浆活动带形成时代深成岩带锆石铀-铅年龄

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Abstract:

在北淮阳带东段,原卢镇关岩群小溪河组火山―深成杂岩是最主要的岩浆活动带。作者们在追索北秦岭加里东期岛弧东延的过程中,对该火山―深成岩带北部四个侵入佛子岭岩群的变形花岗岩测定了单颗粒锆石U-Pb年龄,所得结果为744±9Ma和665±39Ma,属震旦纪,讨论了由此测定结果产生的佛子岭岩群的时代和对比、大别地块的构造归属以及晋宁期的构造环境和演化顺序等问题。

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