Recognition of trigger mechanisms for soft-sediment deformation in the Pleistocene lacustrine deposits of the SantʻArcangelo Basin (Southern Italy): Seismic shock vs. overloading

Moretti, Massimo; Sabato, Luisa

doi:10.1016/j.sedgeo.2006.05.012

Cited by 260 publications

(169 citation statements)

References 49 publications

(57 reference statements)

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“…Therefore, in order to identify the origin of the soft-sediment deformation structures (SSDS), some approaches such as criteria-based and trigger-based approaches are adopted to analyze SSDS [25,28,38].…”

Section: Interpretation Of Deformation Structuresmentioning

confidence: 99%

“…Many studies have investigated the differences between seismic and non-seismic deformation structures [10,27,28,30,41,42,55]. In particular, to infer a probable seismic origin, it is necessary to exclude the influence of sedimentary processes on the unconsolidated sediments [26].…”

Section: Interpretation Of Deformation Structuresmentioning

confidence: 99%

“…SSD can be induced by many natural processes, including gravity acting, overloading, unequal loading, wave-induced cyclical or impulsive stresses, shear by aqueous or other currents, storms, sudden changes in groundwater level, or earthquakes [2][3][4][5][6][7][8][9]. SSD features are known from a wide variety of depositional environments, both terrestrial: fluvial, aelolian or volcanic [9][10][11], or marine: shore, turbiditic, subglacial [12][13][14], but they are particularly well-reported from lacustrine depositional environments [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. The relative abundance of seismites in lacustrine successions is explained by Sims [15] in terms of: (1) the presence of water-saturated sediments; (2) the presence of sediments with high susceptibility to liquefaction; (3) the absence of hydrodynamic and sedimentary processes able to obliterate the products of seismically-induced deformation.…”

Section: Introductionmentioning

confidence: 99%

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Origins of Soft-Sediment Deformation Structures from the Batang Paleodammed Lakes in the Upper Jinsha River, SE Tibetan Plateau

Teng¹,

Chen²,

Cui³

et al. 2017

J Geol Geophys

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Multiple levels of preserved soft-sediment deformation structures occur in sediments deposited in the paleodammed lakes in the Batang-Zhongza reaches of the upper Jinsha River Valley, southeast Tibetan Plateau. These deformation structures include folded layers, convoluted layers, ball-and-pillow structures, recumbent lamination, waterescape structures, and small-scale landslide. Combining the assessments of depositional facies, potential triggers, paleoenvironmental context, we conclude that the probable trigger agents of this deformation were earthquakes, slides, and debris flows. The seismically-induced soft-sediment deformation structures provide new substantial evidence for the existence of active tectonics and paleo-earthquakes in the Batang area since the Holocene.

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Section: Interpretation Of Deformation Structuresmentioning

confidence: 99%

Section: Interpretation Of Deformation Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Origins of Soft-Sediment Deformation Structures from the Batang Paleodammed Lakes in the Upper Jinsha River, SE Tibetan Plateau

Teng¹,

Chen²,

Cui³

et al. 2017

J Geol Geophys

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“…Such phe nom ena are usu ally con sid ered as seis mic phe nomena sensu lato. Some au thors have in di cated the re la tion ship be tween injectites and synsedimentary faults (e.g., Carter and Norris, 1986;Vanneste et al, 1999;Neuwerth et al, 2006;Moretti and Sabato, 2007;Mazumder et al, 2009;Bonini, 2009). Anal o gous lac co lite struc tures have been ob tained in soil (sed iment) fluidization mod el ling in con di tions of cy clic over bur den (shocks) (e.g., Rodrigues et al, 2009;Bu reau et al, 2014).…”

Section: Synsedimentary Deformation Structuresmentioning

confidence: 99%

Synsedimentary seismotectonic features in Triassic and Cretaceous sediments of the Intrasudetic Basin (U Devíti křížů locality) – regional implications

Wojewoda¹,

Rauch²,

Kowalski³

2016

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Synsedimentary de for ma tion struc tures have been rec og nized in Tri as sic and Cre ta ceous sed i men tary rocks of the Trutnov Ba sin, which build a struc tural and mor pho log i cal el e va tion be tween Èervený Kostelec and Upice. Very well pre served sand in jec tion and col lapse struc tures, strike-slip shear ings and listric faults oc cur in the "U Devìti køížù" Quarry. Their shapes and spa tial dis tri bu tion strongly cor re spond to lo cal tec tonic struc tures within the Intrasudetic Shear Zone (ISZ), es pe cially to the faults which bound the rhomb-shaped de pres sions and el e va tions. All these struc tural sub-units com pose the Intrasudetic Ba sin Suite (IBS). The soft-sed i ment de for ma tions de vel oped in the shal low subsurface and most likely re sulted from the dom i nantly extensional and strike-slip ki ne mat ics within the ISZ.

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“…At a certain depth from the water-sediment interface, where sediments are compacted enough, brittle deformation can be observed in terms of microfaults (e.g., Seilacher, 1969;Monecke et al, 2004;Beck, 2009). On the other hand, in less-consolidated sediments, which are closer to the watersediment interface, cyclic loading may result in ductile deformations like microfolds (Monecke et al, 2004), loadcasts (Sims, 1973;Hibsch et al, 1997;Moretti and Sabato, 2007), pseudonodules (Sims, 1973;Migowski et al, 2004;Monecke et al, 2004) and liquefaction/fluidization/fluid-escape structures (Lignier et al, 1998;Chapron et al, 2004;Moernaut et al, 2007;Beck, 2009). In order to assign a seismic triggering mechanism to in-situ soft sediment deformations, researchers often seek for coeval occurrence of deformations at different locations in the lake basin (e.g., Becker et al, 2005;Monecke et al, 2004;Kagan et al, 2011) and temporal correlation of these deformations with known historical earthquakes (Fanetti et al, 2008;Beck, 2009).…”

Section: Earthquake Sedimentary Records In Lacustrine Environmentsmentioning

confidence: 99%

Seismically-triggered organic-rich layers in recent sediments from Göllüköy Lake (North Anatolian Fault, Turkey)

Avşar

Hubert‐Ferrari

Batist

et al. 2014

Quaternary Science Reviews

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Multi-proxy analyses on the sedimentary sequence of Göllüköy Lake, which is located on the eastern North Anatolian Fault (NAF), reveals a complete and high-resolution paleoseismic record for the last 650 years. Six sedimentary events are detected in a 3.1 m-long piston core. They form distinct organic-rich intercalations within the background sedimentation, which are characterized by strong anomalies on the loss-on-ignition (LOI) and total organic carbon (TOC) profiles, as well as by lighter colours on the X-ray radiographic images. Itrax micro-XRF core scanner data are also used to contribute to the detection and characterization of the event deposits. After the detection of the sedimentary events, their temporal correlation with the earthquakes in the historical seismicity catalogue of the NAF is tested. The youngest event is dated to 1940s by using 210 Pb and 137 Cs profiles in sediment, which coincides with the 1939 earthquake (M s = 7.7) on the NAF. The ages of the older five events are determined based on radiocarbon dating and regional time-stratigraphic correlation. Radiocarbon dating on the bulk sediment samples does not provide reliable results due to hard-water effect. On the other hand, dating on charcoals, Ephippia of Daphnia and phragmite remains significantly improves the results and implies a mean sedimentation rate of 0.28 cm/yr. Based on this preliminary sedimentation rate, we show that organic matter content variations through our record correlates with the varve-based δ 18 O record of Nar Lake, which is located 350 km southwest of Göllüköy Lake. Accordingly, high-precipitation/low-evaporation climatic episodes detected in Nar Lake are represented by higher organic matter content in Göllüköy sediments. Fine-tuning the Göllüköy LOI record to the Nar δ 18 O record reveals that the ages of the sedimentary events in Göllüköy match with well-known historical earthquakes that occurred around the lake. Finally, the origin of the organic-rich intercalations is discussed based on macroscopic observations and organic geochemistry. The events are attributed to reworked organic matter eroded from the lake's littoral zone by seismically-induced water oscillations (seiche), and their subsequent deposition at the middle parts of the lake. These seismically-induced events are atypical compared to the classic earthquake-triggered sedimentary processes in lacustrine environments, which are shortly reviewed in order to emphasize the unusual Göllüköy Lake record.

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Recognition of trigger mechanisms for soft-sediment deformation in the Pleistocene lacustrine deposits of the SantʻArcangelo Basin (Southern Italy): Seismic shock vs. overloading

Cited by 260 publications

References 49 publications

Origins of Soft-Sediment Deformation Structures from the Batang Paleodammed Lakes in the Upper Jinsha River, SE Tibetan Plateau

Origins of Soft-Sediment Deformation Structures from the Batang Paleodammed Lakes in the Upper Jinsha River, SE Tibetan Plateau

Synsedimentary seismotectonic features in Triassic and Cretaceous sediments of the Intrasudetic Basin (U Devíti křížů locality) – regional implications

Seismically-triggered organic-rich layers in recent sediments from Göllüköy Lake (North Anatolian Fault, Turkey)

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