摘要
依据现代沉积学及层序地层学的基本原理 ,对渣尔泰山群的沉积特征及层序地层进行分析 ,认为研究区渣尔泰山群由河流沉积体系、碎屑滨岸沉积体系、浅海陆棚沉积体系和浅海碳酸盐沉积体系组成 ;根据岩石组合、沉积旋回、岩相、相序以及地层结构、层序界面等特征 ,在渣尔泰山群内部识别出一个超层序、三个大层序和六个层序 ,其中 SQ1 为 I型层序 ,SQ2 、SQ3、SQ4、SQ5 为 II型层序 ,SQ6为淹没不整合层序。在上述研究的基础上 ,对渣尔泰山群形成时的相对古海平面变化进行了分析 。
Based on the principles of the modern sedimentary and sequence stratigraphy, We analyzed the depositional characteristics of Zhaertaishan Group in Guyang area and concluded that the Group includes the rivers, littoral clastic, neritic shelf and the neritic carbonate rock depositional system. According to the lithologic association, sedimentary cysles, lithofacies sequence, stratigraphic structure and the unconformity interfaces, we distinguished 1 Gigasequance, 3 Mesosequence and 6 Orthosequence in the Group. SQ 1 represents Ⅰ type sequence, SQ 2 ,SQ 3, SQ 4 and SQ 5 represent Ⅱ type sequence. SQ 6 represents submerged unconformity sequence.Relative changes of palaeosea level and the time interval of the sequences in Zhaertaichan Age also are discussed in the paper.
出处
《内蒙古地质》
2001年第3期1-10,共10页
Geology of Inner Mongolia
关键词
渣尔泰山群
沉积体系
层序地层
Zhaertaishan group
depositional systems
sequence stratigraphy
