摘要
本文在1∶25万邦多区幅、措麦区幅填图成果基础上,运用多岛弧造山模式分析了班公湖—怒江结合带南侧弧-盆系时空结构与演化特征。认为中晚侏罗世—早白垩世,伴随班公湖—怒江洋向南俯冲消亡,其南侧形成多岛弧-盆系的空间配置格局;早白垩世晚期—晚白垩世,残余海盆沉积、闭合消亡及其随后的碰撞造山,完成了班公湖—怒江带南侧弧-盆系时空演化史。
On the basis of1 ∶ 250000mapping of the Boindoi Sheet and Comai Sheet,the time-space structure and evolution of the arc-basin system on the southern side of the Bangong Co-Nujiang junction zone is analyzed by using the archipelagic arc orogeny model.The authors believe that during the Middle-Late Jurassic and Early Cretaceous an archipelagic arc-basin system formed on the southern side of the Bangong Co-Nujiang ocean concomitantly with its southward subduction and extinction,and that during the late Early Cretaceous to Late Cretaceous the arc-basin system evolution on the southern side of the Bangong Co-Nujiang junction zone ended through remnant sea basin sedimentation,closing and subduction,and subsequent collisional orogeny.
出处
《中国地质》
CAS
CSCD
2004年第1期51-56,共6页
Geology in China
基金
中国地质调查局国土资源大调查项目(20001300014)资助。
关键词
沉积
时空结构
演化
白垩纪
洋壳剖面
多岛弧造山模式
Bangong Co-Nujiang junction zone
archipelagic arc orogenic model
Asog small oceanic basin
time-space structure and evolution
arc-basin system
