摘要
依据岩石学、地球化学、同位素年代学的新资料，对大别山造山带研究中诸如蛇绿混杂岩、碰撞时代、超高压变质岩与围岩的关系、俯冲极性等问题进行了论证，指出大别山超高压变质带是中朝陆块与扬子陆块间碰撞造山的产物。在三叠纪发生的陆－陆碰撞中，扬子陆块向北俯冲至华北陆块之下，但至今尚无发现残存的蛇绿混杂岩，碰撞时缝合带的位置被已经折返出露地表的南大别碰撞杂岩带所取代。
Hot topics such as ophiolitic melange, collision time, “in
situ/foreign” of UHP rocks and their country gneiss, subduction polarity were discussed in light
of new observations. During the Triassic continental collision, the Yangtze block subducted
northwards beneath the Sino Korean block. However, no relic ophiolitic melange has been
recognized so far. The Triassic collision suture between the two continental blocks is replaced by
the South Dabie Collision Complex that exhumed to nowadays surface.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第4期481-492,共12页
Acta Petrologica Sinica
基金
国家自然科学基金
中国科学院项目基金
