Quaternary sediment dispersal in the Zambezi turbidite system (SW Indian Ocean)

Abstract

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The Congo deep-sea fan: Mineralogical, REE, and Nd-isotope variability in quartzose passive-margin sand

“…They thus represent rich natural archives that quasi-continuously recorded environmental signals from the adjacent continent (Hessler and Fildani 2019). The careful scrutiny of compositional signatures preserved in the sedimentary record and the full comprehension of their meaning potentially allow us to gain insight on how the interplay between tectonics and climate has driven landscape changes across vast continental areas in the recent and less recent past (e.g., Revel et al 2014;Clift 2017;Hein et al 2017;Fierens et al 2020). In turn, reconstructing geological and geomorphological processes through time can allow us to better tune long-term models aimed at understanding how climate has both evolved in the past and will evolve in the future, and its impact on erosion rates, sediment production, vegetation cover, and the carbon cycle (e.g., Galy et al 2011;Wagner et al 2014;Feakins et al 2020).…”

Sedimentary evolution and effects of structural controls on the development of the Zambezi mixed turbidite-contourite system (Mozambique Channel, Southwest Indian Ocean) since the Oligocene

“…J o u r n a l P r e -p r o o f The Zambezi Fan has been studied previously by multiple studies (e.g., Simpson, 1974;Kolla et al, 1980aKolla et al, , 1980bDroz and Mougenot, 1987;Breitzke et al, 2017;Wiles et al, 2017a;Miramontes et al, 2019;Fierens et al, 2019Fierens et al, , 2020. From these we know that the Zambezi Valley and the distal Depositional Area are characterized by coarse-grained deposits (Simpson, 1974;Kolla et al, 1980b;Fierens et al, 2019).…”

“…The Iles Eparses and the Beira High limit a small intraslope basin that has been named the "Intermediate Basin" (Fierens et al, 2019). This basin constitutes the more recent depositional system (Fierens et al, 2020).…”

“…The presence of sediment waves (Breitzke et al, 2017;Fierens et al, 2019) and the flank erosion of the Zambezi Valley (Miramontes et al, 2019) reveal important sediment reworking by strong bottom currents. In contrast, the Ponded Fan has been more poorly studied (Wiles et al, 2017b;Fierens et al, 2019Fierens et al, , 2020. Based on sub-bottom profiler data, Fierens et al (2019) suggested that the Ponded Fan mainly consists of fine-grained turbidites with thin sheet-like, coarse-grained interbeds.…”

From Patagonia to Río de la Plata: Multistep long‐distance littoral transport of Andean volcaniclastic sand along the Argentine passive margin

“…Detritus produced in elevated mountain areas is conveyed through the drainage network of large rivers that flow for thousands of kilometres across continents and deliver their load to the coast (Potter, 1978; Milliman & Farnsworth, 2011; Ashworth & Lewin, 2012). Travel at sea may continue through gravity flows following transverse or more complex pathways towards the abyssal plains (Graham et al ., 1975; Zuffa et al ., 2000; Shapiro et al ., 2007; Fierens et al ., 2020; Garzanti et al ., 2020, 2021a). Gravity, however, is not necessarily the leading actor, and sediment trajectories may not invariably follow the topographic gradient from source to sink.…”