摘要
As view from the petrological, mineralogical and petrochemical studies, the Hongzhen granitoid is characterized by the autichthonous-parautochthonous transformation. The source rocks are mainly felsic clastic sediments with a small amount of intermediate magmatite in the Zhangbaling Group.The granitoid is covered by mylonite and migmatite, and the three rocks share much in common with respect to their REE distribution pattems and the W-type distribution of transition elements,indicating that they all came from identical souree rocks. The granitoid belongs to collision granites or post-orogenic granitoids resulting from ductile thrusting-shearing under 550℃ and 7 × 108 Pa conditions in the foreland of the Yangtze plate during the Late Indosinian movement, and from metasomatism plus partial melting.
As view from the petrological, mineralogical and petrochemical studies, the Hongzhen granitoid is characterized by the autichthonous-parautochthonous transformation. The source rocks are mainly felsic clastic sediments with a small amount of intermediate magmatite in the Zhangbaling Group.The granitoid is covered by mylonite and migmatite, and the three rocks share much in common with respect to their REE distribution pattems and the W-type distribution of transition elements,indicating that they all came from identical souree rocks. The granitoid belongs to collision granites or post-orogenic granitoids resulting from ductile thrusting-shearing under 550℃ and 7 × 108 Pa conditions in the foreland of the Yangtze plate during the Late Indosinian movement, and from metasomatism plus partial melting.
关键词
花岗岩
糜棱岩
混合岩
安徽
柔韧剪切带
granitoid
mylonite
migmatite
thrusting-shearing
Hougzhen area
