Sedimentary processes and origin of sediment gravity-flow deposits on the western Algerian margin during late Pleistocene and Holocene

Giresse, Pierre; Pauc, Henri; Déverchère, Jacques

doi:10.1016/j.marpetgeo.2008.03.011

Cited by 15 publications

(10 citation statements)

References 38 publications

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“…This older sediment accumulation is presumed to correspond to the indurate grey-blue muds related to the transgressive tract of oxygen isotopic Stage 3. This same facies was found included in the debris flow of the lower slope core (KMDJ01) of the Algiers margin (Giresse et al, 2006(Giresse et al, , 2009.…”

Section: Core Kmdj05supporting

confidence: 55%

“…Some small cm-scale schistous debris are included in the sandy bases of the turbidites, but their occurrence, even in the interbedded hemipelagites, indicates recurrent transport by turbidity currents. Average carbonate contents rise near 30%wt with some peaks up to 40%wt and indicate a positive correlation with sand content in the coarse bases of the turbidites (Giresse et al, 2009). Three 14 C ages were obtained: 14,891 cal.…”

Section: Core Kmdj06mentioning

confidence: 93%

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Deposition processes from echo-character mapping along the western Algerian margin (Oran–Tenes), Western Mediterranean

Domzig

Gaullier

Giresse

et al. 2009

Marine and Petroleum Geology

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Section: Core Kmdj05supporting

confidence: 55%

Section: Core Kmdj06mentioning

confidence: 93%

Deposition processes from echo-character mapping along the western Algerian margin (Oran–Tenes), Western Mediterranean

Domzig

Gaullier

Giresse

et al. 2009

Marine and Petroleum Geology

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“…An estimation of the sediment accumulation rate (without taking into account the sediment compaction) from core KMDJ-12 at 3.3 and 5.4 m provide a value of 36 cm/1000 years. This value is consistent with the sedimentation rate value estab- lished by Giresse et al (2008) from sediment cores recovered across the Algerian margin. The two shallowest dates in core KMDJ-14 were performed in the uppermost hemipelagic interval in order to have an estimated age of the first coarsegrained sand turbidite.…”

Section: Lithology and Age Of Sedimentsupporting

confidence: 89%

Mass-Transport Deposits on the Algerian Margin (Algiers Area): Morphology, Lithology and Sedimentary Processes

Dan

Sultan²,

Cattaneo³

et al. 2010

Submarine Mass Movements and Their Consequences

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Abstract:On 21st May 2003, a damaging earthquake of Mw: 6.9 struck the region of Boumerdès 40 km east of Algiers in northern Algeria. The seismic shocks had devastating effects in the offshore area between the cities of Algiers and Dellys, where numerous cable breaks were observed. The submarine area encompassing the 2003 Boumerdès epicenter (central Algerian margin) was recently investigated using geophysical and sampling tools. It has been observed that small-size slides and mass-transport deposits occur across this area. Thus, a detailed analysis was performed on 25 submarine slides identified in water depth from 500 m to 2700 m, by measuring different morphological parameters (i.e. surface, head-scarp height, slope in the source area and in adjacent areas). Various deposits consisting of matrix supported mud-clast, distorted stratified sediments and sand turbidite beds were observed in gravity cores near and within the most significant-size slide. Based on this work and previous studies it can be presumed that the recurrent seismic activity can be considered as the main triggering factor for failure in the central Algerian margin.

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“…Combining a continuous high-resolution record with a conversion to concentration using sub-samples analysed by ICP-OES provides a strong advantage over other methods by producing detailed geochemical profiles for the turbidites in Agadir Basin which allow assessment of bed provenance. Core scanner XRF data have been previously used for turbidite correlations, sediment provenance and sediment diagenesis studies ; Thomson et al 2006;Giresse et al 2009;Cronan et al 2010). ITRAX μXRF data has been previously used to aid identification of volcaniclastic and siliciclastic turbidites from Agadir Basin (Frenz et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Use of Calibrated ITRAX XRF Data in Determining Turbidite Geochemistry and Provenance in Agadir Basin, Northwest African Passive Margin

Hunt

Croudace

Maclachlan

2015

Micro-XRF Studies of Sediment Cores

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The Agadir Basin is a mixed siliciclastic-volcaniclastic deepwater turbidite system derived from several sedimentary sources. Estimating the influence of these sources requires detailed geochemical profiles of sediment cores. This is achieved using an ITRAX µXRF core scanner that normally produces elemental profiles in units of counts or count rate. Improved insights are achieved if the ITRAX data are calibrated to produce concentration data. Turbidite geochemistry can then be used to more reliably infer the sources of flows and identify primary sediment sources, which are the Moroccan slope for siliciclastic beds and the western Canary Islands for volcaniclastic turbidites. Cross-plots of the geochemical data discriminate variations between different siliciclastic and volcaniclastic beds. For example, differences between two distinctive volcaniclastic marker beds, named A2 and A14, reflect differences in their respective Canary Island sources and indicate a primitive basaltic source for bed A2 and an evolved source for bed A14. Compositional variations between siliciclastic deposits reflect potential variations in the sediment source that failed or the location of the failure on the Moroccan continental slope.

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Sedimentary processes and origin of sediment gravity-flow deposits on the western Algerian margin during late Pleistocene and Holocene

Cited by 15 publications

References 38 publications

Deposition processes from echo-character mapping along the western Algerian margin (Oran–Tenes), Western Mediterranean

Deposition processes from echo-character mapping along the western Algerian margin (Oran–Tenes), Western Mediterranean

Mass-Transport Deposits on the Algerian Margin (Algiers Area): Morphology, Lithology and Sedimentary Processes

Use of Calibrated ITRAX XRF Data in Determining Turbidite Geochemistry and Provenance in Agadir Basin, Northwest African Passive Margin

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