Sublacustrine gravity-induced deposits: The diversity of external geometries and origins

Pan, Shuxin; Liu, Huaqing; Xu, Duonian; Wei, Pingsheng; Qu, Yingming; Guan, Xin; Liu, Caiyan; Zhang, Shuncun

doi:10.1016/j.sedgeo.2020.105738

Cited by 7 publications

(6 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hyperpycnal flows have been previously proposed as an important depositional mechanism for the First Member of the Nenjiang Formation (Feng et al, 2006; Mo et al, 2013; Pan, Liu, et al, 2017; Pan et al, 2020). However, previous works (Feng, Zhang, et al, 2010; Pan, Liu, et al, 2017) were mainly focused on coarser sediments (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Hyperpycnal flows have been previously proposed as an important depositional mechanism for the First Member of the Nenjiang Formation (Feng et al, 2006;Mo et al, 2013;Pan et al, 2020). However, previous works F I G U R E 6 (a) Different muddy hyperpycnites produced by floods with varying magnitudes (Modified from Mulder et al, 2003); (b) Waxing and waning states of different muddy hyperpycnites (Modified from (Kneller & Branney, 1995;Mulder et al, 2003) [Colour figure can be viewed at wileyonlinelibrary.com] Liu, et al, 2017) were mainly focused on coarser sediments (e.g.…”

Section: Depositional Model Of Hyperpycnites and Debritesmentioning

confidence: 99%

“…In recent years, large‐scale subaqueous channels and fan systems were identified in the Songliao Basin (Feng et al, 2006; Feng, Zhang, et al, 2010; Pan, Liu, et al, 2017; Pan et al, 2019, 2020), and deposits related to hyperpycnal flows were recognized. These works mainly focused on sandy hyperpycnites or used geophysical analysis, whereas detailed sedimentological analysis of muddy hyperpycnites and debrites deposited in the Songliao Basin is still deficient because of the lack of adequate outcrops.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Depositional Model Of Hyperpycnites and Debritesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

show abstract

“…Previous deep-lacustrine fan models have focussed on the spatial evolution (Dodd et al, 2019;Yang et al, 2019;Pan et al, 2020;Shan et al, 2020), with little attention given to their temporal evolution. By contrast, the various stages of initiation, growth and retreat in ancient marine systems have been evaluated by Hodgson et al (2006) andHodgson, (2009).…”

Section: Temporal Evolution Of Deep-lacustrine Fansmentioning

confidence: 99%

“…Subaqueous sediment gravity flows in deep-lacustrine basins can deposit clean, well-sorted sandstones with excellent reservoir potential (e.g. Horton & Schmidt, 1996;Baganz et al, 2012;Dodd et al, 2019;Zhang et al, 2019;Pan et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Hybrid event bed character and distribution in the context of ancient deep‐lacustrine fan models

Dodd

McCarthy²,

Amy

et al. 2022

Sedimentology

View full text Add to dashboard Cite

Hybrid event beds are texturally and compositionally-diverse deposits preserved within deepwater settings. They are deposited by flows exhibiting 'mixed behaviour', forming complex successions of sandstone and mudstone, which are often challenging to predict.Hybrid event beds are documented in deep-marine settings, where they have been thoroughly characterized, and are well-known as effective fluid transmissibility barriers and Accepted ArticleThis article is protected by copyright. All rights reserved baffles in reservoirs. By comparison, there are far-fewer studies of hybrid event beds from deep-lacustrine settings, where their character and distribution remains relatively underexplored. In order to provide insights into these deposits, this study presents the detailed analysis of three-dimensional seismic data, wireline logs and core from a series of ancient deep-lacustrine fan systems in the North Falkland Basin. Results confirm that deeplacustrine hybrid event beds comprise the same idealized sequence of the 'H1-H5' divisions.However, in this study H3 'debrite' units can be sub-divided into 'H3a-H3c', based on: sharp or erosional intra-H3 contacts, bulk lithology, mud-content and discrete sedimentary textures. This study interprets the H3a-H3c sub-units as the products of multiple flow components formed through significant rearward longitudinal flow transformation processes, during the emplacement of a single hybrid event bed. Hybrid event beds are observed within lobe fringes, where flow types, energies, and transport mechanisms diversify as a result of flow transformation. The temporal context of hybrid event bed occurrences is considered in relation to stages of fan evolution, including: the Initiation; Growth (I); Growth (II); By-pass; Abandonment; and Termination phases. Hybrid event beds are mainly found in either the initiation phase where flow interaction and erosion of initial substrates promoted mixed flow behaviour, or in the abandonment phase as facies belt retreated landward. The results of this study have important implications in terms of flow processes of hybrid event bed emplacement, in particular sub-division of the H3 unit, as well as the prediction of hybrid event bed occurrence and character within ancient deeplacustrine fan settings, in-general.

show abstract

Sediment gravity-flow deposits in Late Cretaceous Songliao postrift downwarped lacustrine basin, northeastern China

Feng

Zou

et al. 2021

Marine and Petroleum Geology

View full text Add to dashboard Cite

Sublacustrine gravity-induced deposits: The diversity of external geometries and origins

Cited by 7 publications

References 79 publications

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

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

Hybrid event bed character and distribution in the context of ancient deep‐lacustrine fan models

Sediment gravity-flow deposits in Late Cretaceous Songliao postrift downwarped lacustrine basin, northeastern China

Contact Info

Product

Resources

About