蒙有言,冯庆来,何卫红,顾松竹,金雨溪,张凡

• 1:中国地质大学
• 2:中国地质大学
• 3:中国地质大学
• 4:中国地质大学

摘要(Abstract)：

桂西南柳桥地区上二叠统为厚约84m的浅灰—灰白色块状海绵蓝藻生物灰岩(生物礁),之上为浅灰绿色—暗灰色薄层状含远洋浮游生物硅质岩、含泥质硅质岩、硅质泥岩(大隆组),这套深水相的沉积岩夹有大量浅灰白色的粘土岩。上覆的三叠系罗楼组底部为黄色泥岩,夹多层灰白色粘土岩,往上渐变为灰色薄层状含大量双壳类、菊石化石的钙质泥岩、泥灰岩。柳桥地区晚二叠世末期沉积岩和中基性火山岩的特征显示其是在地壳裂解、快速沉降、相对海平面快速上升过程中迅速淹没台地边缘的生物礁而形成的深水相海盆,造成深水盆地与浅水台地并存,具有多岛洋的地理分布格局。东攀二叠系-三叠系界线剖面的露头完整,对剖面的岩石学特征、生物化石组合特征等方面的详细研究显示,该地区一直处于连续沉积的深水环境中,没有发生沉积间断,界线上下的岩石特征和生物组合特征较清楚。

关键词(KeyWords)： 深水相;大隆组;地层划分与对比;二叠系;二叠系-三叠系界线;广西

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(No.40232025、No.49972002)资助。

作者(Author): 蒙有言,冯庆来,何卫红,顾松竹,金雨溪,张凡

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