The development of volcanic sequences at rifted margins

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The development of volcanic sequences at rifted margins : New insights from the structure and morphology of the Vøring Escarpment, mid-Norwegian Margin. / Abdelmalak, M. M.; Planke, S.; Faleide, J. I.; Jerram, D. A.; Zastrozhnov, D.; Eide, S.; Myklebust, R.

In: Journal of Geophysical Research: Solid Earth, Vol. 121, No. 7, 01.07.2016, p. 5212-5236.

Research output: Contribution to journal › Article › peer-review

Author

Abdelmalak, M. M. ; Planke, S. ; Faleide, J. I. ; Jerram, D. A. ; Zastrozhnov, D. ; Eide, S. ; Myklebust, R. / The development of volcanic sequences at rifted margins : New insights from the structure and morphology of the Vøring Escarpment, mid-Norwegian Margin. In: Journal of Geophysical Research: Solid Earth. 2016 ; Vol. 121, No. 7. pp. 5212-5236.

BibTeX

@article{fa2efeabfa6c45d790a8511b116c7059,

title = "The development of volcanic sequences at rifted margins: New insights from the structure and morphology of the V{\o}ring Escarpment, mid-Norwegian Margin",

abstract = "On the V{\o}ring Margin offshore mid-Norway, Paleogene continental breakup was characterized by the extrusion of large volumes of flood basalts erupted in different depositional environments. The transition from subaerial to submarine emplacement environment is marked by the formation of the V{\o}ring Escarpment which records the early encroachment of flood basalt into the basin and the buildup of a lava delta system. The increased availability of new and reprocessed high-quality seismic data allows a more detailed characterization of the along-strike and across-strike continuity and variability of the different volcanic seismic facies units. Detailed seismic interpretation shows that the ~350 km long NE-SW trending V{\o}ring Escarpment is a prominent feature along the V{\o}ring Margin with a height ranging between 200 and 1600 m. Structurally, the V{\o}ring Escarpment is segmented along strike into five segments (E1–E5) with different controlling factors leading to variation in accommodation space. Relative sea level change and magma supply are the major controlling factors for segments E2 and E4 which are characterized by a well-developed lava delta system and significant escarpment height. Tectonic movements along the Jan Mayen Fracture Zone resulted in second-order segmentation of the E1 segment into pseudoescarpments with a very thin lava delta system and limited escarpment height. Segments E3 and E5, situated along the flanks of Cretaceous/Paleocene highs, are controlled by the structural highs, which were possibly reactivated during breakup time. Our mapping results provide crucial information about the paleogeography and yield important information regarding the paleo–water depth and depocenter locations prior to and during the breakup of the V{\o}ring Margin.",

keywords = "control factors, escarpment segments, lava delta system, rift topography, V{\o}ring Escarpment, V{\o}ring Margin",

author = "Abdelmalak, {M. M.} and S. Planke and Faleide, {J. I.} and Jerram, {D. A.} and D. Zastrozhnov and S. Eide and R. Myklebust",

year = "2016",

month = jul,

day = "1",

doi = "10.1002/2015JB012788",

language = "English",

volume = "121",

pages = "5212--5236",

journal = "Journal of Geophysical Research: Solid Earth",

issn = "2169-9313",

publisher = "American Geophysical Union",

number = "7",

}

RIS

TY - JOUR

T1 - The development of volcanic sequences at rifted margins

T2 - New insights from the structure and morphology of the Vøring Escarpment, mid-Norwegian Margin

AU - Abdelmalak, M. M.

AU - Planke, S.

AU - Faleide, J. I.

AU - Jerram, D. A.

AU - Zastrozhnov, D.

AU - Eide, S.

AU - Myklebust, R.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - On the Vøring Margin offshore mid-Norway, Paleogene continental breakup was characterized by the extrusion of large volumes of flood basalts erupted in different depositional environments. The transition from subaerial to submarine emplacement environment is marked by the formation of the Vøring Escarpment which records the early encroachment of flood basalt into the basin and the buildup of a lava delta system. The increased availability of new and reprocessed high-quality seismic data allows a more detailed characterization of the along-strike and across-strike continuity and variability of the different volcanic seismic facies units. Detailed seismic interpretation shows that the ~350 km long NE-SW trending Vøring Escarpment is a prominent feature along the Vøring Margin with a height ranging between 200 and 1600 m. Structurally, the Vøring Escarpment is segmented along strike into five segments (E1–E5) with different controlling factors leading to variation in accommodation space. Relative sea level change and magma supply are the major controlling factors for segments E2 and E4 which are characterized by a well-developed lava delta system and significant escarpment height. Tectonic movements along the Jan Mayen Fracture Zone resulted in second-order segmentation of the E1 segment into pseudoescarpments with a very thin lava delta system and limited escarpment height. Segments E3 and E5, situated along the flanks of Cretaceous/Paleocene highs, are controlled by the structural highs, which were possibly reactivated during breakup time. Our mapping results provide crucial information about the paleogeography and yield important information regarding the paleo–water depth and depocenter locations prior to and during the breakup of the Vøring Margin.

AB - On the Vøring Margin offshore mid-Norway, Paleogene continental breakup was characterized by the extrusion of large volumes of flood basalts erupted in different depositional environments. The transition from subaerial to submarine emplacement environment is marked by the formation of the Vøring Escarpment which records the early encroachment of flood basalt into the basin and the buildup of a lava delta system. The increased availability of new and reprocessed high-quality seismic data allows a more detailed characterization of the along-strike and across-strike continuity and variability of the different volcanic seismic facies units. Detailed seismic interpretation shows that the ~350 km long NE-SW trending Vøring Escarpment is a prominent feature along the Vøring Margin with a height ranging between 200 and 1600 m. Structurally, the Vøring Escarpment is segmented along strike into five segments (E1–E5) with different controlling factors leading to variation in accommodation space. Relative sea level change and magma supply are the major controlling factors for segments E2 and E4 which are characterized by a well-developed lava delta system and significant escarpment height. Tectonic movements along the Jan Mayen Fracture Zone resulted in second-order segmentation of the E1 segment into pseudoescarpments with a very thin lava delta system and limited escarpment height. Segments E3 and E5, situated along the flanks of Cretaceous/Paleocene highs, are controlled by the structural highs, which were possibly reactivated during breakup time. Our mapping results provide crucial information about the paleogeography and yield important information regarding the paleo–water depth and depocenter locations prior to and during the breakup of the Vøring Margin.

KW - control factors

KW - escarpment segments

KW - lava delta system

KW - rift topography

KW - Vøring Escarpment

KW - Vøring Margin

UR - http://www.scopus.com/inward/record.url?scp=84978127680&partnerID=8YFLogxK

U2 - 10.1002/2015JB012788

DO - 10.1002/2015JB012788

M3 - Article

AN - SCOPUS:84978127680

VL - 121

SP - 5212

EP - 5236

JO - Journal of Geophysical Research: Solid Earth

JF - Journal of Geophysical Research: Solid Earth

SN - 2169-9313

IS - 7

ER -

ID: 86065235