Frequency of deep-sea turbidity as an important component of the response of a source-to-sink system to climate: A case study in the eastern middle Bengal Fan since 32 ka

Li, Jingrui; Shi, Xuefa; Liu, Shengfa; Qiao, Shuqing; Zhang, Hui; Wu, Kuan; Fang, Xisheng; Yang, Gang; Cao, Peng; XingQuan, Sun; Ye, Wenxing; Jiang, Rui; Khokiattiwong, Somkiat; Kornkanitnan, Narumol

doi:10.1016/j.margeo.2021.106603

Cited by 11 publications

(5 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The BoB-79 core is located in the eastern part of the SoNG, and it is affected by turbidity overflow. The channel-levee system formed by turbidity current along the seafloor has continuously transported sediments from rivers and the shelf to the deep sea over geological history, forming the characteristic deep-sea turbidite layers (Weber and Reilly, 2018;Fauquembergue et al, 2019;Li et al, 2021). The last glacial stage had a high sedimentation rate (mean: 4.5 cm/kyr), and the ratio of smectite to illite in this stage was stabilized in the low range of vibration, thus, indicating the control of materials from the Himalayan source area.…”

Section: Sedimentary Pattern Of the Bob After The Lgmmentioning

confidence: 99%

Sediment provenances shift driven by sea level and Indian monsoon in the southern Bay of Bengal since the last glacial maximum

Liu

Zhang

et al. 2023

Front. Mar. Sci.

Self Cite

View full text Add to dashboard Cite

The Tibetan Plateau uplift has induced the formation of the largest sediment source-sink system in the northeast Indian Ocean, which has become an ideal region for investigating land-sea interaction processes. However, many questions regarding sediment transport patterns and their controlling factors at different time scales remain unanswered. Therefore, in the present study, a gravity core named BoB-79, based on the southern Bay of Bengal (BoB) was selected to investigate sediment provenance shift and its corresponding mechanism to sedimentary environment change since the last glacial maximum (LGM). The clay mineral compositions are analyzed and the whole core sediments reveal a feature dominated by illite (~55%), followed by chlorite (~24%) and kaolinite (~17%), and the content of smectite (~4%) is the lowest. A trigonometric analysis of provenance discrimination of clay minerals showed that the Himalayas, together with the Indian Peninsula, represent the main sources of southern BoB sediments, and the last glacial period might have been controlled by the dominant Himalayan provenance, with an average contribution of approximately 90%. However, as a secondary source, the influence of the Indian Peninsula increased significantly during the Holocene, and its mean contribution was 24%, thus, indicating that it had a crucial effect on the evolution process of BoB. The sediment transportation pattern changed significantly from the LGM to the Holocene: in the last glacial period, the low sea level exposed the shelf area that caused the Ganges River connected with the largest submarine canyon in BoB named Swatch of No Ground (SoNG), and the Himalayan materials could be transported to the BoB directly under a strong turbidity current, thereby forming the deep sea deposition center with a sedimentation rate of 4.5 cm/kyr. Following Holocene, the sea level increased significantly, and the materials from multiple rivers around the BoB were directly imported into the continental shelf area. The intensive Indian summer monsoon dominated the transportation process of the terrestrial materials, thereby forming a deposition center in the shallow water area of the continental shelf northeast Indian Ocean; subsequently, the material flux relative to the input to the deep sea area decreased significantly, and the sedimentation rate in the southern BoB decreased to 1.7 cm/kyr.

show abstract

Section: Sedimentary Pattern Of the Bob After The Lgmmentioning

confidence: 99%

Sediment provenances shift driven by sea level and Indian monsoon in the southern Bay of Bengal since the last glacial maximum

Liu

Zhang

et al. 2023

Front. Mar. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The turbidite layer often produces obvious unconformity in comparison with stable and continuous hemipelagic sediments. This is due to the significant scouring of the underlying strata by the high concentration of suspended sediment, resulting in significant variation in grain size (including higher sand content, coarser mean grain size or median grain size, and a finer positive sequence from bottom to top), higher coarse-grained detrital minerals, such as quartz and zircon, and higher Si/Al, Si/Fe, and Zr/Rb ratios (Fournier et al, 2016;Fauquembergue et al, 2019;Di et al, 2021;Liu et al, 2021;Li et al, 2021a). Core Q6 contains three layers with obvious coarsening grain size at 88-96 cm, 116-128 cm, and 254-260 cm, respectively.…”

Section: Identification Of Turbidite Layersmentioning

confidence: 99%

“…The factors that induce strata instability and result in turbidity current include occasional earthquakes, typhoons, volcanic activity, instantaneous pulse of high sediment supply, sea level fluctuation, gas hydrate decomposition, and leakage (Masson, 1996;Maslin et al, 1998;Prins and Postma, 2000;Ducassou et al, 2009;Lombo Tombo et al, 2015;Creḿière et al, 2016;Zhang et al, 2018b;Maloney et al, 2020;Li et al, 2021a). The instantaneous pulse of high sediment supply is generally related to a sharp increase in the quantity of erosion material.…”

Section: Pulsed Turbidite and Methane Seep Events: Sea-level And Bott...mentioning

confidence: 99%

“…The turbidity current, a gravity flow composed of sediment and water with a density greater than that of the surrounding water, is a characteristic geological agent of sediment transport and deposition in the slope Sedimentologists have struggled to decipher the environmental signals contained in the strata due to the unsteady environment resulting from frequent turbidity currents. Therefore, extracting information for the continuous evolution of the geological environment from instantaneously triggered deep-sea turbidite deposition is an challenge in deep-sea sedimentology (Zaragosi et al, 2006;Toucanne et al, 2008;Pouderoux et al, 2012;Lombo Tombo et al, 2015;Yu et al, 2017;Li et al, 2021a). The occurrence of deep-sea turbidity currents is closely related to strata collapse, which presents hidden dangers to engineering safety.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pulsed turbidite and methane seep records in the north western South China Sea since the last glacial maximum

Li¹,

Miao²,

Feng³

et al. 2023

Front. Mar. Sci.

Self Cite

View full text Add to dashboard Cite

The small-scale event layers in the continental margin contain abundant dynamic environment information, and pose a challenge to the interpretation of continuous sedimentary records, giving geological significance to their accurate identify and possible genesis. Here, pulsed turbidite layers since the last glacial maximum (LGM) in a gravity core in the northwestern South China Sea (SCS) was analyzed to investigate the precisely identification, possible causes and the role of marine environmental change during the late Quaternary in formation of these small-scale event layers in the SCS. Eight potential pulsed turbidite layers, according to the petrographic characteristics, grain size parameters and element geochemistry, were identified. Meanwhile, indicators including total sulfur (TS)/total organic carbon (TOC) ratio, CaCO3 content, and chromium-reducible sulfur (CRS) revealed these horizons were mostly related to methane seep events. Constrained by foraminifera shells AMS14C results, these events were determined to have occurred from the LGM to early Holocene, Similar records in the northern and southern slopes suggests the universal occurrence of these small-scale layers in the SCS. The comprehensive analysis showed that the development of these event layers over the past 25 ka can be divided into three stages, 25-15.5 ka, 15.5-7 ka and 7 ka to present. Late Quaternary Ocean environment changes, especially sea level and bottom water temperature, controlled the occurrence of regional small-scale event layers in the SCS. The regional scale mechanism is that the pressure and temperature change affect the stability of hydrate and the methane seepage, and thus the strata stability. Corresponding to the lowest, the rapid increase and the highest levels of the sea level and bottom water temperature, the temporal evolution pattern of small-scale event layers in the SCS showed a highest, decreased and lowest frequency, respectively. The linkage between the late Quaternary marine environmental change and turbidite deposition through gas activities in this study can act as a useful reference for further understanding the continental margin sedimentary process.

show abstract

“…Despite that, only a few sand provenance studies focused on sediment accumulation and residence time in intermediate alluvial sinks (Garzanti et al., 2011; Sinha et al., 2009). On the contrary, several researchers investigated the provenance of detritus accumulated in deep marine (Amorosi et al., 2022; Critelli et al., 2003; Li et al., 2021; Limonta et al., 2023; Liu et al., 2016; Schroeder et al., 2015; Tentori et al., 2018; Van Grinsven et al., 2019) and coastal sinks (Goodbred Jr & Kuehl, 2000; Ji et al., 2022; Palamenghi et al., 2011; Xue et al., 2010).…”

Section: Introductionmentioning

confidence: 99%

Multi‐source detrital contributions in the Po alluvial basin (northern Italy) since the Middle Pleistocene. Insights into sediment accumulation in intermediate sinks

Demurtas,

Fontana,

Lugli

et al. 2024

Basin Research

View full text Add to dashboard Cite

Integrated stratigraphic‐compositional studies on alluvial successions provide a valuable tool to investigate the provenance of detritus in multi‐source systems. The Po Plain is an intermediate sink of the Po‐Adriatic source‐to‐sink system, fed by rivers draining two orogens. The Alps are characterized by extensive outcrops of plutonic‐metamorphic and ultramafic rocks to the north‐west and of Mesozoic carbonates to the east (Southern Alps). The Northern Apennines, to the south, are dominated by sedimentary successions. The Po River flows from the Western Alps to the Adriatic Sea, interacting with a dense network of transverse tributaries that drain the two orogens. Stratigraphic, sedimentological and compositional analyses of two 101 and 77.5 m‐long cores, recovered from the Central Po Plain, reveal the stacking of three petrofacies, which reflects distinct provenance and configurations of the fluvial network. A South‐Alpine sedimentary input between MIS 12 and MIS 10 is testified by petrofacies 1, characterized by carbonate‐ and volcanic‐rich detritus from rocks exposed in the Southern Alps. A northward shift of the Po River of more than 30 km is marked by a quartz‐feldspar and metamorphic‐rich detritus (petrofacies 2), similar to modern Po River sands. This dramatic reorganization of the fluvial network likely occurred around MIS 9–MIS 8 and is possibly structurally controlled. A further northward shift of the Po River and the onset of Apennine sedimentation in the Late Holocene is revealed by petrofacies 3, rich in sedimentary lithics from the Apennine successions. The results of this study document how compositional analysis, if framed in a robust stratigraphic picture, may provide clues on the evolution of multi‐source alluvial systems.

show abstract

Frequency of deep-sea turbidity as an important component of the response of a source-to-sink system to climate: A case study in the eastern middle Bengal Fan since 32 ka

Cited by 11 publications

References 75 publications

Sediment provenances shift driven by sea level and Indian monsoon in the southern Bay of Bengal since the last glacial maximum

Sediment provenances shift driven by sea level and Indian monsoon in the southern Bay of Bengal since the last glacial maximum

Pulsed turbidite and methane seep records in the north western South China Sea since the last glacial maximum

Multi‐source detrital contributions in the Po alluvial basin (northern Italy) since the Middle Pleistocene. Insights into sediment accumulation in intermediate sinks

Contact Info

Product

Resources

About