A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis

Publikation: KonferencebidragPosterForskning

Standard

A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis. / Schiffer, Christian; Jacobsen, B. H.; Balling, N.; Nielsen, S.B.

2013. Poster session præsenteret ved EGU General Assembly 2013, Vienna, Østrig.

Publikation: KonferencebidragPosterForskning

Harvard

APA

Schiffer, C., Jacobsen, B. H., Balling, N., & Nielsen, S. B. (2013). A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis. Poster session præsenteret ved EGU General Assembly 2013, Vienna, Østrig.

CBE

Schiffer C, Jacobsen BH, Balling N, Nielsen SB. 2013. A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis. Poster session præsenteret ved EGU General Assembly 2013, Vienna, Østrig.

MLA

Schiffer, Christian o.a.. A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis. EGU General Assembly 2013, 07 apr. 2013, Vienna, Østrig, Poster, 2013. 1 s.

Vancouver

Schiffer C, Jacobsen BH, Balling N, Nielsen SB. A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis. 2013. Poster session præsenteret ved EGU General Assembly 2013, Vienna, Østrig.

Author

Schiffer, Christian ; Jacobsen, B. H. ; Balling, N. ; Nielsen, S.B. / A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis. Poster session præsenteret ved EGU General Assembly 2013, Vienna, Østrig.1 s.

Bibtex

@conference{8fb72439f3d94fd5977e9fc77d2d08c2,
title = "A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis",
abstract = "Subsequent to their formation the East Greenland and Scandinavian Caledonides formed a major coherent mountain range. The understanding of the European Caledonides therefore naturally involves also the East Greenland Caledonides. The present-day topography and crustal and upper mantle structure in East Greenland were influenced by an extensive geological evolution involving several geodynamical processes, including the closure of the Iapetus Ocean with continent-continent collision, subsequent gravitational collapse, extension and rifting. The passive margin development associated with the opening of the North Atlantic was furthermore spiced up by the pronounced localized anomalous volcanism around Iceland. Erosion shaped the today{\textquoteright}s distinct geological structure and landscape, culminating in the Quaternary glaciations.The focus of this presentation is on the deep crustal and upper mantle evidence for the processes before and under the Caledonian orogeny.We performed a Receiver Function analysis of data from 11 seismological broadband stations forming the Ella-{\O}array.This array, maintained by Aarhus University, covered an approximately 270 km long profile, spanning the East Greenland Caledonides from the Greenland Ice Sheet to the coast at about 73 N for a period of two years (2009-2011).The data reveal a clear eastward dipping lineament through the mantle lithosphere underneath the study area. The geophysical character as well as synthetic modelling is consistent with a 6-12 km thick, subducted slab of high velocity, eclogitized oceanic crust. We interpret this structure as a remnant of an early subduction and collisional event which pre-dates the main Scandian phase of orogeny with the collision of Baltica and Laurentia. This is a key evidence for the unravelling of the complexity of the closure of the Iapetus Ocean and the formation of the Caledonides.",
keywords = "East Greenland, Caledonides, Receiver Functions, Fossil Subduction, Seismology",
author = "Christian Schiffer and Jacobsen, {B. H.} and N. Balling and S.B. Nielsen",
year = "2013",
month = apr,
day = "8",
language = "English",
note = "EGU General Assembly 2013 ; Conference date: 07-04-2013 Through 12-04-2013",

}

RIS

TY - CONF

T1 - A fossil subduction zone in the East Greenland Caledonides revealed by a Receiver Function analysis

AU - Schiffer, Christian

AU - Jacobsen, B. H.

AU - Balling, N.

AU - Nielsen, S.B.

PY - 2013/4/8

Y1 - 2013/4/8

N2 - Subsequent to their formation the East Greenland and Scandinavian Caledonides formed a major coherent mountain range. The understanding of the European Caledonides therefore naturally involves also the East Greenland Caledonides. The present-day topography and crustal and upper mantle structure in East Greenland were influenced by an extensive geological evolution involving several geodynamical processes, including the closure of the Iapetus Ocean with continent-continent collision, subsequent gravitational collapse, extension and rifting. The passive margin development associated with the opening of the North Atlantic was furthermore spiced up by the pronounced localized anomalous volcanism around Iceland. Erosion shaped the today’s distinct geological structure and landscape, culminating in the Quaternary glaciations.The focus of this presentation is on the deep crustal and upper mantle evidence for the processes before and under the Caledonian orogeny.We performed a Receiver Function analysis of data from 11 seismological broadband stations forming the Ella-Øarray.This array, maintained by Aarhus University, covered an approximately 270 km long profile, spanning the East Greenland Caledonides from the Greenland Ice Sheet to the coast at about 73 N for a period of two years (2009-2011).The data reveal a clear eastward dipping lineament through the mantle lithosphere underneath the study area. The geophysical character as well as synthetic modelling is consistent with a 6-12 km thick, subducted slab of high velocity, eclogitized oceanic crust. We interpret this structure as a remnant of an early subduction and collisional event which pre-dates the main Scandian phase of orogeny with the collision of Baltica and Laurentia. This is a key evidence for the unravelling of the complexity of the closure of the Iapetus Ocean and the formation of the Caledonides.

AB - Subsequent to their formation the East Greenland and Scandinavian Caledonides formed a major coherent mountain range. The understanding of the European Caledonides therefore naturally involves also the East Greenland Caledonides. The present-day topography and crustal and upper mantle structure in East Greenland were influenced by an extensive geological evolution involving several geodynamical processes, including the closure of the Iapetus Ocean with continent-continent collision, subsequent gravitational collapse, extension and rifting. The passive margin development associated with the opening of the North Atlantic was furthermore spiced up by the pronounced localized anomalous volcanism around Iceland. Erosion shaped the today’s distinct geological structure and landscape, culminating in the Quaternary glaciations.The focus of this presentation is on the deep crustal and upper mantle evidence for the processes before and under the Caledonian orogeny.We performed a Receiver Function analysis of data from 11 seismological broadband stations forming the Ella-Øarray.This array, maintained by Aarhus University, covered an approximately 270 km long profile, spanning the East Greenland Caledonides from the Greenland Ice Sheet to the coast at about 73 N for a period of two years (2009-2011).The data reveal a clear eastward dipping lineament through the mantle lithosphere underneath the study area. The geophysical character as well as synthetic modelling is consistent with a 6-12 km thick, subducted slab of high velocity, eclogitized oceanic crust. We interpret this structure as a remnant of an early subduction and collisional event which pre-dates the main Scandian phase of orogeny with the collision of Baltica and Laurentia. This is a key evidence for the unravelling of the complexity of the closure of the Iapetus Ocean and the formation of the Caledonides.

KW - East Greenland

KW - Caledonides

KW - Receiver Functions

KW - Fossil Subduction

KW - Seismology

M3 - Poster

T2 - EGU General Assembly 2013

Y2 - 7 April 2013 through 12 April 2013

ER -