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

Yang, Tian; Cao, Yingchang; Liu, Keyu; Wang, Yanzhong; Zavala, Carlos; Friis, Henrik; Song, Mingshui; Yuan, Guanghui; Liang, Chao; Xi, Kelai; Wang, Jian

doi:10.1016/j.marpetgeo.2018.12.033

Cited by 47 publications

(54 citation statements)

References 107 publications

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Section: Introductionmentioning

confidence: 99%

“…Debris flows are one kind of sub-aqueous sediment gravity flows, which are caused by excessive sediment density (Yang et al, 2019). They are defined as a laminar plastic flow in which sediment is supported by the matrix strength, grain-to-grain interactions, excess pore fluid pressure, or buoyancy (Talling et al, 2012;Yang et al, 2019). Although more detailed classifications exist, debris flows can be typically subdivided into two types: sandy (or non-cohesive) debris flows, and muddy (or cohesive) debris flows (Shanmugam, 1996;Talling et al, 2012;Shanmugam, 2000;Yang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…They are defined as a laminar plastic flow in which sediment is supported by the matrix strength, grain-to-grain interactions, excess pore fluid pressure, or buoyancy (Talling et al, 2012;Yang et al, 2019). Although more detailed classifications exist, debris flows can be typically subdivided into two types: sandy (or noncohesive) debris flows, and muddy (or cohesive) debris flows (Shanmugam, 1996;Tallinget al, 2012;Shanmugam, 2000;Yang et al, 2019). More detailed description and classification about debris flows can be found in Talling et al (2012).…”

Section: Introductionmentioning

confidence: 99%

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Stacked debris flows offshore Sakarya Canyon, western Black Sea: morphology, seismic characterization and formation processes

Dondurur¹,

Nasıf²

2021

Turkish J Earth Sci

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Analysis of ca. 1400 km of multi-channel seismic data indicate that the distal part of the Sakarya Canyon within the continental rise is an unstable region with sediment erosion. Fourteen buried debris flows (DB1-DB14), in the stacked form within Plio-Quaternary sediments between 1400 and 1950 m water depth, were observed in the surveyed area. Their run-out distances range from 3.8 to 24.4 km. The largest debris flow DB10 affects ca. 225 km 2 surficial area transporting ca. 15 km 3 of sediment in S to N direction. 2 The debris flows in the area are considered as gravity flows of unconsolidated sediments mobilized due to the excess pore pressures occurred in the unconsolidated shallow sediments arising from the high sedimentation rate. We also suggest that extensive seismic activity of North Anatolian Fault (NAF) located ca. 140 km south of the of the study area along with the possible local fault activity is also a significant triggering factor for the flows. The stacked form of the debrites indicates that the excess pore pressure conditions are formed periodically over the time in the continental rise, which makes the region a potentially unstable area for the installation of offshore engineering structures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stacked debris flows offshore Sakarya Canyon, western Black Sea: morphology, seismic characterization and formation processes

Dondurur¹,

Nasıf²

2021

Turkish J Earth Sci

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“…In contrast to many well-documented sub-marine fan fringe deposits, there is much less information about the sub-lacustrine ones. Lacustrine sediment gravity flow deposits are probably different from marine ones, because marine environments are characterized by larger-scale depositional systems, deeper water, and a longer runout distance (Yang et al 2019). Most sub-lacustrine fan deposits were interpreted mostly as debrites or/and turbidites, including the well-known Eocene Dongying depression and the Upper Triassic turbidites in the Ordos Basin (Zou et al 2012;Liu et al 2017;Yang et al 2017Yang et al , 2019.…”

Section: Introductionmentioning

confidence: 99%

Bed type and flow mechanism of deep water sub-lacustrine fan fringe facies: an example from the Middle Permian Lucaogou Formation in Southern Junggar Basin of NW China

Shan

Jin

et al. 2020

Pet. Sci.

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Submarine or sub-lacustrine lobe deposits are important reservoirs, but the fan fringe deposits form heterogeneities within deep water fan deposits. Fan fringe facies records the complex sediment gravity flow types. By understanding of the bed types and flow mechanisms, we can identify the fan fringe deposit, which aids in the reconstruction of deep water fan and reservoir evaluations. The Jiucaiyuanzi and Dalongkou sections in the West Bogda Mountains preserve well-exposed 536-m and 171-m thick successions, respectively, of a deep water lacustrine depositional system from the Middle Permian Lucaogou Formation. Bed types of the Lucaogou Formation include high-density turbidite, low-density turbidite, incomplete Bouma-type turbidite, hybrid event beds, and slump deposits. The Lucaogou Formation is interpreted here as a fan fringe facies due to the thin bed thickness that characterize turbidites and hybrid event beds, as well as the predominance of the isolated sheet architecture. Previous studies suggest that these deposits were considered as deposited in a deep water setting due to the absence of wave-related structures. The presence of abundant mud clasts in massive medium-coarse grained sandstone beds reflects the significant erosional capability and interactions between high-density turbidity currents and lake floor. The fan fringe facies here contains amalgamated and thick-bedded homolithic facies (~ 30%) and thin-bedded heterolithic facies (~ 70%). The examination of the bed type is of wider significance for facies prediction and reservoir heterogeneity in the sub-lacustrine fan fringe facies.

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“…A debris flow is a gravity-driven mass flow with plastic rheology and laminar state, it is predominantly supported by the matrix strength, grain-to-grain interactions, excess pore fluid pressure, or buoyancy, and accumulated by en masse settling (Coussot & Meunier, 1996;Locat & Lee, 2005;Naylor, 1980;Qian & Das, 2019;Shanmugam, 2016;Talling, Masson, Sumner, & Malgesini, 2012;Yang, Cao, et al, 2019). Deposits formed by debris flows are termed debrites, which can also be sandy and muddy in composition (Coussot & Meunier, 1996;Locat & Lee, 2005) (Shanmugam, 2016;Talling et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Fine‐grained gravity flow deposits and their depositional processes: A case study from the Cretaceous Nenjiang Formation, Songliao Basin, NE China

Tian

Gao

et al. 2020

Geological Journal

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The Songliao Basin in NE China is a large rift basin filled with Cretaceous terrestrial sediments. Lacustrine mudstones of the Nenjiang Formation form an important source rock in the Cretaceous Songliao Basin. These shales are commonly thought to have been deposited in deep, quiet, and anoxic environments. Samples obtained from the core of the SK‐2 scientific borehole provide critical insights to understand the hydrodynamic and hydroclimatic environments, which are, however, different from the traditional views regarding the deposition of these rocks. By following a mudstone description guide, five different mudstone lithofacies (LF) transported and deposited by muddy hyperpycnal flows and muddy debris flows were recognized. They are laminated fine mudstone (LF1), laminated medium mudstone (LF2), and laminated coarse mudstone (LF3) showing pairs of inverse grading (Ha) and normal grading (Hb) under the microscope, graded coarse mudstone (LF4) and massive coarse mudstone (LF5). We found that mudstones of the First Member of the Nenjiang Formation are dominated by siliciclastic detritus and argillaceous components and show frequent variations in grain size. Because large‐scale sub‐lacustrine channels travelling long distance (>80 km) were widely distributed in the Songliao palaeolake during the deposition of the Nenjiang Formation, fluctuations in mudstone grain size might have been caused by velocity fluctuations in flows. Sedimentary structures and textures preserved in mudstones of the First Member of the Nenjiang Formation indicate that the majority of these lithofacies were accumulated by muddy hyperpycnal flows and muddy debris flows. Therefore, a depositional model dominantly influenced by muddy hyperpycnal flows and debris flows is proposed. This work not only provides a new view for the depositional process of mudstones of the Songliao Basin, NE China, but also give insights to understand lacustrine palaeoenvironment and terrestrial palaeoclimate.

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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

Cited by 47 publications

References 107 publications

Stacked debris flows offshore Sakarya Canyon, western Black Sea: morphology, seismic characterization and formation processes

Stacked debris flows offshore Sakarya Canyon, western Black Sea: morphology, seismic characterization and formation processes

Bed type and flow mechanism of deep water sub-lacustrine fan fringe facies: an example from the Middle Permian Lucaogou Formation in Southern Junggar Basin of NW China

Fine‐grained gravity flow deposits and their depositional processes: A case study from the Cretaceous Nenjiang Formation, Songliao Basin, NE China

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