NEW ADVANCES IN THE STUDY OF THE DENGFENG COMPLEX IN THE SONGSHAN REGION, HENAN PROVINCE
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摘要: 经重新研究，将原登封群分为３套岩石序列：（１）新太古代构造地层单位登封岩群，为变质表壳岩系，代表绿岩建造；（２）新太古代构造岩石单位，为变质侵入岩系；（３）古元古代侵入岩系。它们共同构成嵩山花岗岩—绿岩地体。新太古代岩石经历了嵩阳运动第一幕（约２．５Ｇａ）、第二幕（约２．２Ｇａ）和中岳运动（约１．９Ｇａ）３个重要变质变形期，据此建立的ｐ—Ｔ—ｔ—Ｄ轨迹显示花岗岩—绿岩地体变质变形与陆壳碰撞隆升过程有密切关系Abstract: Through a further study, the original Dengfeng Group is divided into three parts: （1） a Neoarchaeozoic tectonostratigraphic unit named the Dengfeng Group Complex, a meta surpracrustal rock series, representing the greenstone formation; （2） a Neoarchaeozoic tectono lithostratigraphic unit, a metamorphic intrusive rock series; （3） the Early Palaeoproterozoic intrusive rock series. All of the three parts combine to form the Songshan granite greenstone terrane. The Neoarchaeozoic rocks underwent three major stages of deformation and metamorphism: （1） the first episode of the Songyang orogeny （about 2.5 Ga）; （2） the second episode of the Songyang orogeny （about 2.2 Ga）; （3） the Zhongyue orogeny （about 1.9 Ga）. The p T t D path shows that the deformation and metamorphism of the granite greenstone terrane were closely related to the process of the continental crustal collision and uplift.
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