摘要
将南沙地块南缘与加里曼丹—巴拉望地块作为一个构造演化的整体进行研究,对南海南部构造边界的蛇绿—混杂岩及岩浆岩的分布和岩性,以及南海南部前陆盆地的构造与沉积特征加以描述、分析,发现前陆盆地系统的形成时间是自西南往东北,逐渐由晚始新世末—早中新世—中中新世,与南边的俯冲碰撞带形成时间相对应,认为南沙地块南缘与加里曼丹—巴拉望地块之间经历了一个与古南海消亡息息相关的连续演化的过程。
The south margin of Nansha microblock and Kalimantan-Palawan block was taken as a whole to discuss its structural evolvement during Cenozoic. Through describing the distributions and lithologic characters of ophiolite-melange and magmatic rocks along southern structural boundary of the South China Sea, and analyzing the structural-sedimentary characters of foreland basins in the south of the South China Sea, we found that the forming of those foreland basins was gradually from southwest to northeast, and it started in late Eocene in the southwest and in middle Miocene in the northeast, corresponding to the forming of subduction zone along the south margin. We suggested that in Tertiary the south margin of Nansha microblock and Kalimantan-Palawan block experienced a successive evolving process which was closely linked with the die-out of proto-South China Sea.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2007年第1期61-70,共10页
Marine Geology & Quaternary Geology
基金
国家自然科学基金项目(40576025)
关键词
前陆盆地
蛇绿岩
古南海
foreland basin
ophiolite
proto-South China Sea
