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选用大离子亲石元素 Rb、Sr对大别造山带核部天堂寨和九资河花岗岩进行成岩模拟 ,结果表明 :( 1)天堂寨花岗岩主要与非平衡熔融有关 ,偏基性片麻岩可能是天堂寨花岗岩的主要原岩 ;( 2 )九资河花岗岩主要由片麻岩的平衡非实比批式熔融作用形成 ,但也不排除由偏基性片麻岩发生非平衡熔融形成九资河花岗岩的可能性 ;( 3 )天堂寨与九资河花岗岩熔融方式的差异可能反映了大别造山带燕山晚期不同地壳层次变质岩熔融方式的差别 ,即中下地壳以高温非平衡部分熔融为主 ,而中地壳以低温平衡熔融为主 ,并伴随有局部偏基性片麻岩的非平衡熔融
The large ion lithophile element Rb, Sr was used to simulate the diagenesis of Tiantangzhai and Jiuzijian granites in the core of the Dabie orogenic belt. The results show that (1) the Tiantangzhai granite is mainly related to non-equilibrium melting, Is the main original rock of Tiantangzhai granite; (2) Jiuzijian granite is mainly formed by balanced non-solid batch melting of gneiss, but does not rule out the non-equilibrium melting formed by partial gneiss, (3) The differences of melting methods between Tiantangzhai and Jiuzijie granites may reflect the differences in the melting methods of the metamorphic rocks at different crusts in the Late Yanshanian Dabie orogenic belt, that is, While the middle crust is dominated by low-temperature equilibrium melting accompanied by the non-equilibrium melting of locally-derived gneiss