贵阳花溪地区下、中三叠统层序地层及其海平面变化
AN OUTCROP SEQUENCE-STRATIGRAPHIC STUDY OF THE LOWER AND MIDDLE TRIASSIC IN THE HUAXI AREA,GUIYANG
时国,田景春,喻美艺
摘要(Abstract)：
早、中三叠世时贵阳花溪地区可以划分为3个沉积相区:台地相区、台缘相区和盆地相区。在对不同相带内典型剖面详细观察和层序界面识别基础上,在下、中三叠统中划分出4个Ⅰ型沉积层序和1个Ⅱ型层序。通过研究剖面纵向的沉积相变和横向低位岩楔的位置迁移,认为研究区在早—中三叠世经历了一个完整的二级海平面升降旋回,早三叠世与全球海平面变化基本一致,呈上升趋势;中三叠世由于构造作用,海平面总体呈下降趋势,表现出区域特殊性。
关键词(KeyWords)： 层序地层;碳酸盐岩;海平面变化;下三叠统;中三叠统;贵阳;贵州
基金项目(Foundation): 国家自然科学基金(No.41002007);; 贵州省“早三叠世遗迹化石及其对P-T事件后生物复苏的启示”(41002007)资助
作者(Author): 时国,田景春,喻美艺
DOI: 10.19839/j.cnki.dcxzz.2011.04.008
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