黔南地区早二叠世大幅度冰川性海平面下降的沉积学新证据

被引：24

作者：

严雅娟

颜佳新

武思琴

机构：

[1] 中国地质大学生物地质与环境地质国家重点实验室

来源：

地球科学(中国地质大学学报) | 2015年 / 40卷 / 02期

关键词：

黔南; 早二叠世; 砾状灰岩; 海平面下降; 冰期; 沉积学;

D O I：

暂无

中图分类号：

P512.2 [剥蚀作用、搬运作用、沉积作用];

学科分类号：

070908 [沉积学（含古地理学）];

摘要：

众所周知,石炭纪-二叠纪期间冈瓦纳大陆冰盖的推进和消融在低纬度地区形成了许多高频海平面升降变化和广泛分布的旋回沉积.最新研究表明,石炭纪-二叠纪冰室气候时期的大陆冰盖是由一系列不连续的冰期组成.因此石炭纪-二叠纪期间既存在高频低幅的海平面变化,也发育多次大幅度海平面下降.前者在华南地区已有研究证实,后者仍需要深入研究.描述了贵州龙吟和紫云扁平剖面早二叠世碳酸盐岩地层中古岩溶特征,包括垮塌角砾岩及相关沉积构造,分别对应早二叠世两次冰期导致的显著海平面下降,对深入了解华南地区早二叠世古地理演化具有重要意义.

引用

页码：372 / 380

页数：9

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