古地理学报2012，Vol.14Issue(3)：303-310,8.
鄂尔多斯盆地华池-庆阳地区上三叠统延长组长6油层组古地震变形构造及砂体叠置关系
Palaeoearthquake deformation structures of the Chang 6 interval of Upper Triassic Yanchang Formation and superimposed relationship between sandbodies in Huachi-Qingyang area of Ordos Basin
摘要
Abstract
The Chang 6 interval of the Upper Triassic Yangchang Formation in the Ordos Basin is one of the most important interval of the Mesozoic section. The Chang 6 interval are characterized by the development of reservoir sandbodies and multiple genetic types. During the sedimentary evolution of the Chang 6 interval of Yanchang Formation in Huachi-Qingyang area of the Ordos Basin, liquefaction deformation structures related with palaeoearthquake are developed extensively. The authors, based on many previous research results, by detailed description and observation of drilling cores of Chang 6 interval in the re-search area, studied the characteristics of liquefaction deformation structures systematicly. The structures mainly include; Load and sand ball structure, vibrational liquefaction curl deformation structure, sand invasion mushroom, liquefaction dike, such as liquefied swing structure. The difference of deformation structures formed by seismic events and gravity slumping are distinguished, mainly as; The advantage deformation direction of deformation structures, the existence of the sliding surface and the existence of uniform layer. Based on the above analyses, the vertical relationship between the delta front sandbody formed by normal deposition or slump turbidite sandbody and seismite sandbody are also studied which include two types: The overlay between seismic events sandbody and the normal deposition sandbody ( delta front sandbody) ; the seismic events sandbody and slump turbidite sandbody formed from delta front. At the end, the origin models are established.关键词
鄂尔多斯盆地/长6油层组/液化变形构造/变形构造成因/砂体叠置关系/成因模式Key words
Ordos Basin/ Chang 6 interval/ liquefaction deformation structure/ origin of deformation structure/ superimposed relationship between sandbodies/ origin mode分类
天文与地球科学引用本文复制引用
田景春,王文之,王峰,王卫红,张锦泉..鄂尔多斯盆地华池-庆阳地区上三叠统延长组长6油层组古地震变形构造及砂体叠置关系[J].古地理学报,2012,14(3):303-310,8.基金项目
"十一五"国家重大专项下属专题(编号:2008ZX05007-005)部分研究成果 （编号:2008ZX05007-005）
