摘要
通过岩石学和地球化学研究，认为佛坪地区花岗岩类可分为两种不同的成因类型：深熔混合岩化型和陆壳重熔型。它们具有截然不同的野外地质特征和稀土元素地球化学特征，反映造山带不同演化阶段的构造热事件。深熔混合岩化小岩体与晋宁期南秦岭强烈变质变形密切相关；大面积出露的陆壳重熔型岩体则是主造山期地慢上涌引起的垂向加积构造演化的物质反映，对佛坪穹窿的形成和穹窿中心基底结晶杂岩的抬升剥露有重要意义．
Petrological and geochemical studies demonstrate that the granitoids occured in Foping areacan be divided into two genetic types:The anamigmatization type and continental crust remeltingtype,They have distinctive field geological and REE geochemical characteristics,and reflect the tec-tonic heat events under different evolution stages of the orogenic belt.The small rock body of theanamigmatization type is closely related to the intensive metamorphism and deformation of South Qin-ling in the Jinning period.The continental crust remelting type batholith is the material reflecting ofthe vertical accretion tectonic evolution caused by the mantle uplift.That is of important signiflcanceto the formation of the Foping dome and uplifting and exhumation of the basement crystaline complexin the center of the dome。
出处
《西北大学学报（自然科学版）》
CAS
CSCD
1995年第5期497-502,共6页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学基金
关键词
深熔混合岩化
陆壳重熔
秦岭
造山带
花岗岩
anamigmatization
continental crust remelting
vertical accretion
Foping
Qinling oro-genic belt
