Carbonate delta drift

A new sediment drift type

Thomas Lüdmann, Christian Betzler, Gregor P Eberli, Jesús Reolid, John J.G. Reijmer, Craig R. Sloss, Or M. Bialik, Carlos A. Alvarez-Zarikian, Montserrat Alonso-García, Clara L. Blättler, Junhua Adam Guo, Sébastien Haffen, Senay Horozal, Mayuri Inoue, Luigi Jovane, Dick Kroon, Luca Lanci, Juan Carlos Laya, Anna Ling Hui Mee, Masatoshi Nakakuni & 10 others B. Nagender Nath, Kaoru Niino, Loren M. Petruny, Santi D. Pratiwi, Angela L. Slagle, Xiang Su, Peter K Swart, James D. Wright, Zhengquan Yao, Jeremy R. Young

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Based on high-resolution reflection seismic and core data from IODP Expedition 359 we present a new channel-related drift type attached to a carbonate platform slope, which we termed delta drift. Like a river delta, it is comprised of several stacked lobes and connected to a point source. The delta drifts were deposited at the exit of two gateways that connect the Inner Sea of the Maldives carbonate platform with the open ocean. The channels served as conduits focusing and accelerating the water flow; Entrained material was deposited at their mouth where the flows relaxed. The lobe-shaped calcareous sediment drifts must have formed under persistent water through flow. Sediment supply was relatively high and continuous, resulting in an average sedimentation rate of 17 cm ka−1. The two delta drifts occupy 342 and 384 km2, respectively; with a depositional relief of approximately 500 m. They have a sigmoidal clinoform reflection pattern with a particular convex upward bending of the foresets. In the Maldives the drift onset marks the transition from a sea-level controlled to a progressively current dominated depositional regime. This major event occurred in the Serravallian about 13 Ma ago, leading to the partial drowning of the carbonate platform and the creation of shallow seaways. The initial bank-enclosed topography resembles an “empty bucket” geometry which is rapidly filled by the drift sediments that aggrade and prograde into the basin. Thereby the depositional environment of the delta drifts changes from deep water (>500) to shallow-water conditions at their topsets, indicated by the overall coarsening upward trend in grain size and the presence of shallow water large benthic foraminifers at their top.

Original languageEnglish (US)
Pages (from-to)98-111
Number of pages14
JournalMarine Geology
Volume401
DOIs
StatePublished - Jul 1 2018

Fingerprint

Carbonates
Sediments
carbonate
carbonate platform
Water
sediment
shallow water
Serravallian
Sea level
Coarsening
benthic foraminifera
open ocean
Sedimentation
sedimentation rate
depositional environment
Topography
seismic reflection
point source
water flow
relief

Keywords

  • Bottom current
  • Carbonate platform
  • Clinoform
  • Delta drift
  • Drift sedimentation
  • Maldives

ASJC Scopus subject areas

  • Oceanography
  • Geology
  • Geochemistry and Petrology

Cite this

Lüdmann, T., Betzler, C., Eberli, G. P., Reolid, J., Reijmer, J. J. G., Sloss, C. R., ... Young, J. R. (2018). Carbonate delta drift: A new sediment drift type. Marine Geology, 401, 98-111. https://doi.org/10.1016/j.margeo.2018.04.011

Carbonate delta drift : A new sediment drift type. / Lüdmann, Thomas; Betzler, Christian; Eberli, Gregor P; Reolid, Jesús; Reijmer, John J.G.; Sloss, Craig R.; Bialik, Or M.; Alvarez-Zarikian, Carlos A.; Alonso-García, Montserrat; Blättler, Clara L.; Guo, Junhua Adam; Haffen, Sébastien; Horozal, Senay; Inoue, Mayuri; Jovane, Luigi; Kroon, Dick; Lanci, Luca; Laya, Juan Carlos; Mee, Anna Ling Hui; Nakakuni, Masatoshi; Nath, B. Nagender; Niino, Kaoru; Petruny, Loren M.; Pratiwi, Santi D.; Slagle, Angela L.; Su, Xiang; Swart, Peter K; Wright, James D.; Yao, Zhengquan; Young, Jeremy R.

In: Marine Geology, Vol. 401, 01.07.2018, p. 98-111.

Research output: Contribution to journalArticle

Lüdmann, T, Betzler, C, Eberli, GP, Reolid, J, Reijmer, JJG, Sloss, CR, Bialik, OM, Alvarez-Zarikian, CA, Alonso-García, M, Blättler, CL, Guo, JA, Haffen, S, Horozal, S, Inoue, M, Jovane, L, Kroon, D, Lanci, L, Laya, JC, Mee, ALH, Nakakuni, M, Nath, BN, Niino, K, Petruny, LM, Pratiwi, SD, Slagle, AL, Su, X, Swart, PK, Wright, JD, Yao, Z & Young, JR 2018, 'Carbonate delta drift: A new sediment drift type', Marine Geology, vol. 401, pp. 98-111. https://doi.org/10.1016/j.margeo.2018.04.011
Lüdmann T, Betzler C, Eberli GP, Reolid J, Reijmer JJG, Sloss CR et al. Carbonate delta drift: A new sediment drift type. Marine Geology. 2018 Jul 1;401:98-111. https://doi.org/10.1016/j.margeo.2018.04.011
Lüdmann, Thomas ; Betzler, Christian ; Eberli, Gregor P ; Reolid, Jesús ; Reijmer, John J.G. ; Sloss, Craig R. ; Bialik, Or M. ; Alvarez-Zarikian, Carlos A. ; Alonso-García, Montserrat ; Blättler, Clara L. ; Guo, Junhua Adam ; Haffen, Sébastien ; Horozal, Senay ; Inoue, Mayuri ; Jovane, Luigi ; Kroon, Dick ; Lanci, Luca ; Laya, Juan Carlos ; Mee, Anna Ling Hui ; Nakakuni, Masatoshi ; Nath, B. Nagender ; Niino, Kaoru ; Petruny, Loren M. ; Pratiwi, Santi D. ; Slagle, Angela L. ; Su, Xiang ; Swart, Peter K ; Wright, James D. ; Yao, Zhengquan ; Young, Jeremy R. / Carbonate delta drift : A new sediment drift type. In: Marine Geology. 2018 ; Vol. 401. pp. 98-111.
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AU - Alvarez-Zarikian, Carlos A.

AU - Alonso-García, Montserrat

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AU - Haffen, Sébastien

AU - Horozal, Senay

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AU - Mee, Anna Ling Hui

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