沈炎彬,邓希光,欧阳舒,郑祥身,刘小汉

• 1:中国科学院南京地质古生物研究所!江苏南京210008
• 2:中国科学院地质与地球物理研究所!北京100029
• 3:中国科学院南京地质古生物研究所!江苏南京210008
• 4:中国科学院地质与地球物理研究所!北京100029

摘要(Abstract)：

南极南设得兰群岛利文斯顿岛 Miers Bluff组 (MBF)是一套岩层倒转、强烈变形、浅变质的浊流沉积地层 ,主要由砂岩、泥岩、粉砂岩及含砾砂岩组成 ,具有很好的韵律层 ,形成鲍玛序列 ,通常被认为属于近海底扇浊流沉积 ,并当作中新生代火山岩的基底。最近发现的孢粉化石指明其时代属晚三叠世 ,从而解决了久来时代的疑问(石炭—三叠纪 ,二叠—三叠纪 ,或前侏罗纪 )。分布在南极半岛格雷厄姆地的特里尼蒂半岛群、南奥克尼群岛的杂砂岩—页岩组、智利南部乔诺斯群岛乔诺斯变质杂岩的 Potranca组以及新西兰惠灵顿的 Torlesse杂岩应是时代相当、岩性及沉积环境相似的岩层。三叠纪末受太平洋板块俯冲影响 ,这一浊流地层褶皱、变形、隆升 ,具有相同的构造风格 ,是冈瓦纳古陆在侏罗纪早期开始裂解前夕一次构造事件的重要佐证

关键词(KeyWords)： MiersBluff组;浊流沉积;上三叠统;地层对比;南极

Abstract:

Keywords:

基金项目(Foundation): 国家科学技术部攻关项目 !(98-92 7-0 1) ;; 中国科学院“九五”资源和环境研究重点项目 !(KZ-95 -A1-2 0 5 ) ;; 国家自然科学基金资?

作者(Author): 沈炎彬,邓希光,欧阳舒,郑祥身,刘小汉

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