Genesis and depositional model of subaqueous sediment gravity-flow deposits in a lacustrine rift basin as exemplified by the Eocene Shahejie Formation in the Jiyang Depression, Eastern China
Genesis and depositional model of subaqueous sediment gravity-flow deposits in a lacustrine rift basin as exemplified by the Eocene Shahejie Formation in the Jiyang Depression, Eastern China
复制标题
湖泊裂谷盆地水下沉积物重力流沉积的成因及沉积模式——以济阳坳陷始新世沙河街组为例
DOI：
10.1016/j.marpetgeo.2018.12.033
复制
发表时间：
2019-04
影响因子：
4.2
通讯作者：
Wang Jian
中科院分区：
文献类型：
--
作者：
Yang Tian;Cao Yingchang;Liu Keyu;Wang Yanzhong;Zavala Carlos;Friis Henrik;Song Mingshui;Yuan Guanghui;Liang Chao;Xi Kelai;Wang Jian
近些年来，水下沉积重力流(SSGF)沉积被认为是湖盆中的主要储集层。研究它们的成因和沉积模式是了解重力流演化和矿床分布的关键。根据三维地震资料、测井资料和岩心观测资料，对中国东部济阳凹陷沙河街组三段沙三段沉积进行了分析。研究了SSGF的类型和成因，SSGF矿床的分布模式和沉积模式。泥石流、砂质泥石流、高密度浊流、涌浪状低密度浊流和准稳定低密度浊流是主要由河流洪水和泥沙崩塌引起的。SSGF矿床的总体分布受控于沉积物供给、盆地结构和层序地层格架。古地形、洪水能量、触发机制和三角洲前缘的倾角也是重要的因素。与河流洪水有关的SSGF沉积可进一步细分为细长形和扇形沉积。拉长砂岩主要由推移质为主和悬移质为主的超高温流沉积组成。扇形砂岩可细分为内扇、中扇和外扇。内扇沉积以充填沟谷的碎屑岩为主。中扇沉积主要由河道充填沉积组成，外扇沉积由薄层和横向宽阔的扇叶段组成。由沉积物破裂触发的SSGF矿床可根据其与滑塌的接近程度进一步细分：近端、中端和远端部分。近端沉积主要由滑塌沉积和滑塌沉积组成。中层沉积以砂质碎屑岩舌体为主，远端沉积主要由薄层状低密度浊积岩组成。本研究对湖相裂谷盆地重力流的类型、成因及其沉积的分布提供了一定的认识。
Subaqueous sediment gravity-flow (SSGF) deposits have recently been recognized as a major reservoir plays in lacustrine basins. Research on their genesis and depositional models are crucial to understand gravity flow evolution and the distribution of their deposits. This study analysed SSGF deposits in the third member of the Shahejie Formation in the Jiyang Depression, Eastern China, based on 3-D seismic data, well-log data, and core observations. The types and origins of SSGF, the distribution patterns and depositional models of SSGF deposits have been investigated. The dominant types of SSGF include: muddy debris flows, sandy debris flows, high density turbidity currents, surge-like low density turbidity currents, and quasi-steady low density turbidity currents, which are mainly caused by river floods and sediment failures. The overall distribution of SSGF deposits is controlled by the sediment supplies, basin structure, and sequence stratigraphic framework. Paleotopography, flood energy, triggering mechanism, and the slope angle of the delta front are also important. SSGF deposits associated with river floods can be further subdivided into elongated and fan-shaped deposits. Elongated sandstones are composed predominantly of bedload-dominated and suspension load-dominated hyperpycnal flow deposits. The fan-shaped sandstones can be subdivided into an inner fan, a middle fan, and an outer fan. Inner fan deposits are dominated by gully-filling debrites. Middle fan deposits are composed predominantly of channel-fill deposits, while outer fan deposits consist of thin bedded and laterally extensive lobe intervals. SSGF deposits triggered by sediment failures can be further subdivided according to their proximity to slumping: proximal, intermediate and distal parts. The proximal deposits are composed predominantly of slide and slump deposits. The intermediate deposits are dominated by sandy debrite tongues, while the distal deposits are composed predominantly of thin-bedded, surge-like, low-density turbidites. This study offers some insight into the types, origin of gravity-flow, as well as the distribution of their deposits in a lacustrine rift basin.
登录
查看更多内容
重力流沉积物分类及其对非常规石油勘探的意义——以鄂尔多斯盆地南部三叠系延长组为例
影响因子：
3
作者：
Fan Aiping;Yang Renchao;van Loon A J;Yin Wei;Han Zuozhen;Zavala Carlos
通讯作者：
Zavala Carlos
影响因子：
5.8
作者：
Xuewei Zhang;C. Scholz;R. Hecky;D. Wood;H. Zal;C. Ebinger
通讯作者：
Xuewei Zhang;C. Scholz;R. Hecky;D. Wood;H. Zal;C. Ebinger
影响因子：
2.8
作者：
A. Gladkov;E. Lobova;E. Deev;A. Korzhenkov;J. Mažeika;S. Abdieva;E. Rogozhin;M. Rodkin;A. B. Fortuna;T. A. Charimov;A. Yudakhin
通讯作者：
A. Gladkov;E. Lobova;E. Deev;A. Korzhenkov;J. Mažeika;S. Abdieva;E. Rogozhin;M. Rodkin;A. B. Fortuna;T. A. Charimov;A. Yudakhin
DOI：
10.1306/13271348st613436
发表时间：
2011
期刊：
--
影响因子：
--
作者：
T. Mulder;E. Chapron
通讯作者：
T. Mulder;E. Chapron
影响因子：
2
作者：
Yvonne T. Spychala;D. Hodgson;A. Prélat;I. Kane;S. Flint;N. Mountney
通讯作者：
Yvonne T. Spychala;D. Hodgson;A. Prélat;I. Kane;S. Flint;N. Mountney