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Sequence stratigraphy of Carboniferous at Bachu area, Tarim Basin
Author(s): GUO Jianhua, SUN Sangdun, XU Jie, GUO Yuancao, ZHANG Linting(schoolofgeosciencesandenvironmentengineering, CENTRAL Southuniversity, CHANGSHA 410083, china)
Pages: 257-
264
Year: 2010
Issue:
1
Journal: Journal of Central South University of Technology
Keyword: 层序地层; 层序边界; 石炭系; 巴楚地区;
Abstract: 对岩芯进行观察与描述,对测井曲线与岩性的岩-电关系进行对比,对地震反射特征进行研究,并采用层序地层学对连井剖面进行对比。研究结果表明:研究区石炭纪地层内反映海平面变化的地层旋回性十分清楚;按层序划分的基本原则,在石炭纪地层中可识别出6个层序边界,相应地划分出5个层序,其中至少有2个Ⅰ型层序;在Ⅰ型层序内部,低位体系域发育较差,主要为侵蚀沟谷充填体系及山前的扇体系;海侵体系域以碳酸盐岩沉积为主;而高位体系域则表现为西南以碳酸盐岩为主,向东北则逐渐过渡为广泛的碎屑潮坪或沼泽;自生屑灰岩段沉积时开始,巴楚地区西南缘构造沉降速率明显加快,沉积厚度加大,碳酸盐岩的含量也相应增加。
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