First Discovery of Channel-Levee Complexes In A Modern Deep-Water Carbonate Slope Environment

Mulder, Thierry; Ducassou, Emmanuelle; Gillet, Hervé; Hanquiez, Vincent; Principaud, Mélanie; Chabaud, Ludivine; Eberli, Gregor P.; Kindler, Pascal; Billeaud, Isabelle; Gonthier, E.; Fournier, François; Léonide, Philippe; Borgomano, Jean

doi:10.2110/jsr.2014.90

Cited by 30 publications

(24 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Though many workers have provided key insights into slope evolution through the analysis of ancient (e.g., Uchupi and Emery, 1967;Hadler-Jacobsen et al, 2005;Houseknecht et al, 2009) and modern systems (e.g., Wynn et al, 2000;Mulder et al, 2014), information on the timing and duration of slope evolutionary phases is limited. Elucidating the timing of slope systems provides insight into the mecha-nisms that initiated and propagated phases of their evolution (cf.…”

Section: Introductionmentioning

confidence: 99%

Timing of deep-water slope evolution constrained by large-n detrital and volcanic ash zircon geochronology, Cretaceous Magallanes Basin, Chile

et al. 2017

View full text Add to dashboard Cite

Deciphering depositional age from deposits that accumulate in deep-water slope settings can enhance understanding of shelf-margin evolutionary timing, as well as controlling mechanisms in ancient systems worldwide. Basin analysis has long employed biostratigraphy and/or tephrochronology to temporally constrain ancient environments. However, due to poor preservation of index fossils and volcanic ash beds in many deepwater systems, deducing the timing of slope evolution has proven challenging. Here, we present >6600 new U-Pb zircon ages with stratigraphic information from an ~100-kmlong by ~2.5-km-thick outcrop belt to elucidate evolutionary timing for a Campanian-Maastrichtian slope succession in the Magallanes Basin, Chile. Results show that the succession consists of four stratigraphic intervals, which characterize four evolutionary phases of the slope system. Overall, the succession records 9.9 ± 1.4 m.y. (80.5 ± 0.3 Ma to 70.6 ± 1.5 Ma) of graded clinoform development punctuated by out-of-grade periods distinguished by enhanced coarse-grained sediment bypass downslope. Synthesis of our results with geochronologic, structural, and stratigraphic data from the basin suggests that slope evolution was largely controlled by an overall decline in basin subsidence from 82 to 74 Ma. In addition to providing insight into slope evolution, our results show that the reliability of zircon-derived depositional duration estimates for ancient sedimentary systems is controlled by: (1) the proportion of syndepositionally formed zircon in a strati

show abstract

Section: Introductionmentioning

confidence: 99%

Timing of deep-water slope evolution constrained by large-n detrital and volcanic ash zircon geochronology, Cretaceous Magallanes Basin, Chile

et al. 2017

View full text Add to dashboard Cite

show abstract

“…A final export to the basin through downslope processes could have contributed to the feeding of deep sedimentary systems. Such carbonate turbidite systems have been identified in other areas such as the Bahamas (Mulder et al, 2014).…”

Section: Sediment Transport and Depositsmentioning

confidence: 72%

Geomorphology and sedimentology of a modern isolated carbonate platform: The Glorieuses archipelago, SW Indian Ocean

et al. 2016

View full text Add to dashboard Cite

The study of modern carbonate systems is commonly helps in improving facies interpretation in fossil reefs and in providing analogues of sediment distribution depending on the specific platform configuration (i.e. rimmed shelves and isolated carbonate platforms). This paper deals with a geomorphological and sedimentological study of the Glorieuses Archipelago, an isolated carbonate platform located between the northern tip of Madagascar and Mayotte. The dataset consists of Digital Terrain Model, satellite imagery, and box-sediment samples. Analyses of grain-size and composition of carbonate grains are used to characterize the distribution and heterogeneity of sediment accumulated on the isolated platform. Main results show that the Glorieuses Archipelago is organized in distinctive morphological units, including a reef flat developed along the windward side, an apron, and a semienclosed (< 12 m water depth) to open lagoon (> 12 m and up to 15 m water depth). The lack of carbonate mud in sediments deposited on the archipelago can be explained by the direct connection between the lagoon and the open ocean. The main carbonate grains include Halimeda segments, coral fragments, large benthic foraminifers, red algae, and molluscs. According to the shape and the position of intertidal sandwaves, the current arrangement of moderately sorted fine to medium sands appears to be strongly influenced by tidal currents. The in-situ sediment production, accumulation and transport on the platform finally contribute to carbonate sand export to distinct deep marine areas depending on wind regimes and currents.Highlights ► Sedimentolological and geomorphological study of a modern isolated carbonate platform ► Dataset includes Digital Terrain Model, satellite imagery, box-sediment samples ► Seven morphological units have been defined ► Absence of mud can be explained by the winnowing of fine particles in the lagoon ► the sediment distribution is mainly influenced by wind regimes and currents

show abstract

“…Calciclastic subaqueous channels are rare in comparison to siliciclastic submarine channels, in both the modern (e.g., Mulder et al, 2014Mulder et al, , 2019, and the ancient (Payros and Pujalte, 2008). Modern examples of calciclastic systems include the ∼250km-long Exuma (Bahamas) valley, canyon, and submarine fan system (Mulder et al, 2019), the 135-km-long Great Abaco Canyon (Bahamas) (Mulder et al, 2018) and the 80-km-long Bass Canyon (Australia) (Mitchell et al, 2007).…”

Section: The Longest Calciclastic Submarine Channel Yet Mappedmentioning

confidence: 99%

The Geomorphology of Submarine Channel Systems of the Northern Line Islands Ridge, Central Equatorial Pacific Ocean

et al. 2020

View full text Add to dashboard Cite

More than 844,000 km 2 of the northern Line Islands Ridge mapped with multibeam bathymetry and backscatter provide unprecedented views of the geomorphology of this isolated area in the central equatorial Pacific Ocean. A compilation of all available multibeam data in the area reveals six extensive submarine dendritic channel systems that encompass a combined drainage area that exceeds 60,000 km 2. The channel systems occur in a predominately carbonate environment and are the longest calciclastic submarine channel systems mapped in the oceans to date. The channel systems occur in a carbonate-dominated region well above the carbonate compensation depth and have developed into the surface of basins that are surrounded by small guyots and seamounts that make up a discontinuous rim around the summit of the northern Line Island Ridge. The channels have mostly straight or gently curved well-developed tributaries and main reaches. Although the Line Island Ridge has been dated at 86 to 68 Ma old, the channels occur on the surface and are not buried by any significant sediment accumulations. Levees are very rare along the channel banks and no bathymetric expression of submarine fans was found where the channels exit onto the adjacent abyssal basins. There is sparse evidence of landslide deposits throughout the ridge although the flanks of the guyots exhibit numerous headwall scarps. The presence of plunge pools below the northwest escarpment, together with well-defined channels meters to hundreds of meters deep relative to the surrounding seafloor, suggests the channels might be relatively recent (perhaps late Neogene or even younger) features developed long after the ridge subsided more than a kilometer below sea level.

show abstract

First Discovery of Channel-Levee Complexes In A Modern Deep-Water Carbonate Slope Environment

Cited by 30 publications

References 45 publications

Timing of deep-water slope evolution constrained by large-n detrital and volcanic ash zircon geochronology, Cretaceous Magallanes Basin, Chile

Timing of deep-water slope evolution constrained by large-n detrital and volcanic ash zircon geochronology, Cretaceous Magallanes Basin, Chile

Geomorphology and sedimentology of a modern isolated carbonate platform: The Glorieuses archipelago, SW Indian Ocean

The Geomorphology of Submarine Channel Systems of the Northern Line Islands Ridge, Central Equatorial Pacific Ocean

Contact Info

Product

Resources

About