Sediment waves: geohazard or geofeature?

Putans, V. A.

doi:10.3990/2.262

Cited by 1 publication

(2 citation statements)

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“…The high-resolution seismic reflection surveys revealed expressive erosional and depositional features on slopes and the rise of the Derbent Basin and in the middle part of the Caspian Sea [5,7,41]. These features had not been distinguished earlier as contourites because of the low resolution of air gun seismic profiling, and similar ones were considered here as slump or landslide features, tectonic folds, or creep deformations [9,32].…”

Section: Resultsmentioning

confidence: 99%

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Contourite and Turbidite Features in the Middle Caspian Sea and Their Connection to Geohazards Derived from High-Resolution Seismic Data

Yutsis

Левченко

Putans

2022

JMSE

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High fluvial input combined with specific topographic and oceanographic settings in the Caspian Sea create favorable conditions for contourite deposition. For the first time in its middle portion, contourite deposits have been observed in high-resolution seismic profiles. Various types of contourite drifts and mixed depositional systems have been revealed on the lower slope and in the adjacent basin, some of which are accompanied by sediment wave fields. The deposition of contourites or turbidites and their lateral distribution is controlled by sea-floor topography and oceanographic processes, as well as the modern activity of gravity flows downslope on the western Caucasian slope and in the channel system on the Mangyshlak Sill. The contourite drifts and sediment wave fields form several contourite depositional systems, which seem to merge in the Caspian contourite depositional complex. This occurs near the foot of slopes of the Derbent Basin and is related to the counterclockwise circum-Caspian current in the Middle Caspian Sea. The fact that the Caspian Sea is the largest lake in the world makes this region a significant area for research into the “lake contourites” issue. The Caspian Sea is an important oil-producing area, and sedimentary processes related to the contourite and turbidite can be a source of potential geohazards in the construction and exploitation of underwater engineering structures

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Section: Resultsmentioning

confidence: 99%

“…Possible accumulative and erosive sedimentary contourite features were first identified on the northern and especially western slopes of the Derbent Basin [5,41]. Its southern and eastern slopes are much less studied, but sedimentary features similar to the contourite ones appear to be observed there as well [6].…”

Section: Discussionmentioning

confidence: 99%