地质学报2017，Vol.91Issue(3)：645-657,13.
鄂尔多斯盆地上三叠统延长组长8段液化柱及相关软沉积物变形
The Liquefied Pillars and Other SSDS of the 8th Member of the Upper Triassic Yanchang Formation in the Ordos Basin
摘要
Abstract
The deformation structure of liquefied pillars was first identified in the cores from the 8th member of the Upper Triassic Yanchang Formation in the Ordos Basin.Both the macroscopic and microscopic characteristics of the liquefied pillars were studied in this paper.Soft sediment deformation structures (SSDS),such as the liquefied SSDS,hydroplastic SSDS and some brittle SSDS,have been found not only in many different sections of the cores from the 8th member of the Yanchang Formation,but also in other cores collected from other areas in the basin.And they present repeatedly along the cores.Basing on the sedimentary environment and tectonic background,the authors propose that the triggering mechanism of the liquefied pillars and these SSDS is the earthquakes originating from the Qinling orogenic process since the late Triassic.Analysis of the temporal and spatial distribution of these seismic SSDS suggests that the Ordos Basin had been controlled by the dynamic mechanism of the Qinling Mountains orogenic belt throughout the entire deposition period of the 8th Member of the Yanchang Formation,but not only in the late period of the 8th Member of the Yanchang Formation.关键词
鄂尔多斯盆地/上三叠统长8段/液化柱/软沉积物变形/秦岭造山带Key words
Ordos Basin/the 8th section of the Yanchang Formation of the Upper Triassic/liquefied pillar/soft sediment deformation structure (SSDS)/the Qingling orogenic belt引用本文复制引用
贺静,冯胜斌..鄂尔多斯盆地上三叠统延长组长8段液化柱及相关软沉积物变形[J].地质学报,2017,91(3):645-657,13.基金项目
本文为国家重点基础研究发展计划“973”项目(编号2014CB239003)和国家自然科学基金重大项目(编号41390451)联合资助的成果. （编号2014CB239003）
