Rock fragments from mud volcanic deposits of the Gulf of Cadiz: An insight into the Eocene-Pliocene sedimentary succession of the basin

D. O. Ovsyannikov, A. Yu Sadekov, E. V. Kozlova

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Two hundred clasts from the mud breccia extruded by the Yuma mud volcano in the Gulf of Cadiz are used to establish an offshore stratigraphy. The clasts are a very complex mixture of material from the sedimentary successions through which the mud volcano erupted and provide important information about the composition and genesis of deep-seated strata. We deal with fragments of rocks that were deposited millions of years ago, subsequently buried and later erupted on to the seafloor. Rock fragments from the mud breccia, studied in thin section under a polarizing microscope, provide genetic indications suggestive of deep-sea conditions during the accumulation of strata. A reconstruction of the sedimentary succession through which the Yuma mud volcano erupted and the depositional evolution of the Gulf of Cadiz was made on the basis of lithology and age determinations of the rock. Age and depositional environment documented by the clasts indicate that a marine basin existed in the Gulf of Cadiz area at least from the Eocene, and that in the Early and Middle Eocene a deep-sea fan depositional environment prevailed in the region, resulting in the accumulation of thick turbidites. The Late Eocene and Oligocene are not represented among rock fragments from the mud breccia, suggesting regional uplift and non-deposition in the area. Sedimentation was re-established in the Miocene with the accumulation of a clayey Aquitanian-Burdigalian succession. Pelagic carbonate sedimentation became predominant in the Langhian time. The Serravallian-Early Tortonian is characterized by a high supply of terrigenous material, resulting in the deposition of turbiditic clays and sands. Shallow water sedimentation with accumulation of carbonate rocks prevailed in the basin during the Middle Tortonian.

Original languageEnglish
Pages (from-to)211-221
Number of pages11
JournalMarine Geology
Volume195
Issue number1-4
DOIs
Publication statusPublished - 30 Mar 2003
Externally publishedYes

Fingerprint

mud volcano
Pliocene
Eocene
mud
Deposits
breccia
Rocks
Volcanoes
clast
Tortonian
Sedimentation
sedimentation
basin
depositional environment
rock
Carbonates
Serravallian
Burdigalian
submarine fan
age determination

Cite this

@article{bb9f1c72c5534a4dbd55d9e43edef0a2,
title = "Rock fragments from mud volcanic deposits of the Gulf of Cadiz: An insight into the Eocene-Pliocene sedimentary succession of the basin",
abstract = "Two hundred clasts from the mud breccia extruded by the Yuma mud volcano in the Gulf of Cadiz are used to establish an offshore stratigraphy. The clasts are a very complex mixture of material from the sedimentary successions through which the mud volcano erupted and provide important information about the composition and genesis of deep-seated strata. We deal with fragments of rocks that were deposited millions of years ago, subsequently buried and later erupted on to the seafloor. Rock fragments from the mud breccia, studied in thin section under a polarizing microscope, provide genetic indications suggestive of deep-sea conditions during the accumulation of strata. A reconstruction of the sedimentary succession through which the Yuma mud volcano erupted and the depositional evolution of the Gulf of Cadiz was made on the basis of lithology and age determinations of the rock. Age and depositional environment documented by the clasts indicate that a marine basin existed in the Gulf of Cadiz area at least from the Eocene, and that in the Early and Middle Eocene a deep-sea fan depositional environment prevailed in the region, resulting in the accumulation of thick turbidites. The Late Eocene and Oligocene are not represented among rock fragments from the mud breccia, suggesting regional uplift and non-deposition in the area. Sedimentation was re-established in the Miocene with the accumulation of a clayey Aquitanian-Burdigalian succession. Pelagic carbonate sedimentation became predominant in the Langhian time. The Serravallian-Early Tortonian is characterized by a high supply of terrigenous material, resulting in the deposition of turbiditic clays and sands. Shallow water sedimentation with accumulation of carbonate rocks prevailed in the basin during the Middle Tortonian.",
keywords = "Cenozoic mud volcanism, Depositional environment, Depositional processes, Foraminifera, Gulf of Cadiz",
author = "Ovsyannikov, {D. O.} and Sadekov, {A. Yu} and Kozlova, {E. V.}",
year = "2003",
month = "3",
day = "30",
doi = "10.1016/S0025-3227(02)00689-8",
language = "English",
volume = "195",
pages = "211--221",
journal = "Marine Geology",
issn = "0025-3227",
publisher = "Elsevier",
number = "1-4",

}

Rock fragments from mud volcanic deposits of the Gulf of Cadiz : An insight into the Eocene-Pliocene sedimentary succession of the basin. / Ovsyannikov, D. O.; Sadekov, A. Yu; Kozlova, E. V.

In: Marine Geology, Vol. 195, No. 1-4, 30.03.2003, p. 211-221.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Rock fragments from mud volcanic deposits of the Gulf of Cadiz

T2 - An insight into the Eocene-Pliocene sedimentary succession of the basin

AU - Ovsyannikov, D. O.

AU - Sadekov, A. Yu

AU - Kozlova, E. V.

PY - 2003/3/30

Y1 - 2003/3/30

N2 - Two hundred clasts from the mud breccia extruded by the Yuma mud volcano in the Gulf of Cadiz are used to establish an offshore stratigraphy. The clasts are a very complex mixture of material from the sedimentary successions through which the mud volcano erupted and provide important information about the composition and genesis of deep-seated strata. We deal with fragments of rocks that were deposited millions of years ago, subsequently buried and later erupted on to the seafloor. Rock fragments from the mud breccia, studied in thin section under a polarizing microscope, provide genetic indications suggestive of deep-sea conditions during the accumulation of strata. A reconstruction of the sedimentary succession through which the Yuma mud volcano erupted and the depositional evolution of the Gulf of Cadiz was made on the basis of lithology and age determinations of the rock. Age and depositional environment documented by the clasts indicate that a marine basin existed in the Gulf of Cadiz area at least from the Eocene, and that in the Early and Middle Eocene a deep-sea fan depositional environment prevailed in the region, resulting in the accumulation of thick turbidites. The Late Eocene and Oligocene are not represented among rock fragments from the mud breccia, suggesting regional uplift and non-deposition in the area. Sedimentation was re-established in the Miocene with the accumulation of a clayey Aquitanian-Burdigalian succession. Pelagic carbonate sedimentation became predominant in the Langhian time. The Serravallian-Early Tortonian is characterized by a high supply of terrigenous material, resulting in the deposition of turbiditic clays and sands. Shallow water sedimentation with accumulation of carbonate rocks prevailed in the basin during the Middle Tortonian.

AB - Two hundred clasts from the mud breccia extruded by the Yuma mud volcano in the Gulf of Cadiz are used to establish an offshore stratigraphy. The clasts are a very complex mixture of material from the sedimentary successions through which the mud volcano erupted and provide important information about the composition and genesis of deep-seated strata. We deal with fragments of rocks that were deposited millions of years ago, subsequently buried and later erupted on to the seafloor. Rock fragments from the mud breccia, studied in thin section under a polarizing microscope, provide genetic indications suggestive of deep-sea conditions during the accumulation of strata. A reconstruction of the sedimentary succession through which the Yuma mud volcano erupted and the depositional evolution of the Gulf of Cadiz was made on the basis of lithology and age determinations of the rock. Age and depositional environment documented by the clasts indicate that a marine basin existed in the Gulf of Cadiz area at least from the Eocene, and that in the Early and Middle Eocene a deep-sea fan depositional environment prevailed in the region, resulting in the accumulation of thick turbidites. The Late Eocene and Oligocene are not represented among rock fragments from the mud breccia, suggesting regional uplift and non-deposition in the area. Sedimentation was re-established in the Miocene with the accumulation of a clayey Aquitanian-Burdigalian succession. Pelagic carbonate sedimentation became predominant in the Langhian time. The Serravallian-Early Tortonian is characterized by a high supply of terrigenous material, resulting in the deposition of turbiditic clays and sands. Shallow water sedimentation with accumulation of carbonate rocks prevailed in the basin during the Middle Tortonian.

KW - Cenozoic mud volcanism

KW - Depositional environment

KW - Depositional processes

KW - Foraminifera

KW - Gulf of Cadiz

UR - http://www.scopus.com/inward/record.url?scp=0037473267&partnerID=8YFLogxK

U2 - 10.1016/S0025-3227(02)00689-8

DO - 10.1016/S0025-3227(02)00689-8

M3 - Article

VL - 195

SP - 211

EP - 221

JO - Marine Geology

JF - Marine Geology

SN - 0025-3227

IS - 1-4

ER -