Aarhus University Seal / Aarhus Universitets segl

Is High Topography Around the North Atlantic Supported From the Upper Mantle?

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Standard

Is High Topography Around the North Atlantic Supported From the Upper Mantle? / Hejrani, Babak; Balling, Niels; Jacobsen, Bo Holm; Nielsen, Søren Bom.

I: Journal of Geophysical Research: Solid Earth, Bind 125, Nr. 9, e2020JB019808, 09.2020.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

APA

CBE

MLA

Hejrani, Babak o.a.. "Is High Topography Around the North Atlantic Supported From the Upper Mantle?". Journal of Geophysical Research: Solid Earth. 2020. 125(9). https://doi.org/10.1029/2020JB019808

Vancouver

Author

Hejrani, Babak ; Balling, Niels ; Jacobsen, Bo Holm ; Nielsen, Søren Bom. / Is High Topography Around the North Atlantic Supported From the Upper Mantle?. I: Journal of Geophysical Research: Solid Earth. 2020 ; Bind 125, Nr. 9.

Bibtex

@article{97096b481d17466f94bfa023bb7d5a57,
title = "Is High Topography Around the North Atlantic Supported From the Upper Mantle?",
abstract = "The traveltime residuals of 393 receiver sites with more than 21,000 P wave and 9,700 S wave arrivals are used to investigate the upper-mantle P and S wave velocity structure down to the depth of 500 km beneath the regions of high topography of the North Atlantic Caledonian crust. In east Greenland, we observe high-velocity anomalies beneath high topography. In northern Norway and Sweden, a stable thick lithosphere beneath both the high topography and the Baltic shield exists. Only southern Norway exhibits a weak correlation between high topography and low-velocity anomalies of P and S waves. Consequently, the correlation of topography versus average relative traveltime residuals in four regions of proposed Cenozoic epeirogenic uplift reveals positive correlation only in southern Norway and negative or absence of correlation in other regions. These results show that high topography does not correlate with the inferred velocity structure of the upper mantle in the North Atlantic realm. Consequently, our findings weaken the hypothesis of dynamic topography and epeirogenic uplift of the Atlantic margins during the Late Cenozoic.",
keywords = "Caledonian mountains, dynamics of lithosphere and mantle, Greenland, North Atlantic, Northwestern Europe, upper-mantle velocity structure",
author = "Babak Hejrani and Niels Balling and Jacobsen, {Bo Holm} and Nielsen, {S{\o}ren Bom}",
year = "2020",
month = sep,
doi = "10.1029/2020JB019808",
language = "English",
volume = "125",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "9",

}

RIS

TY - JOUR

T1 - Is High Topography Around the North Atlantic Supported From the Upper Mantle?

AU - Hejrani, Babak

AU - Balling, Niels

AU - Jacobsen, Bo Holm

AU - Nielsen, Søren Bom

PY - 2020/9

Y1 - 2020/9

N2 - The traveltime residuals of 393 receiver sites with more than 21,000 P wave and 9,700 S wave arrivals are used to investigate the upper-mantle P and S wave velocity structure down to the depth of 500 km beneath the regions of high topography of the North Atlantic Caledonian crust. In east Greenland, we observe high-velocity anomalies beneath high topography. In northern Norway and Sweden, a stable thick lithosphere beneath both the high topography and the Baltic shield exists. Only southern Norway exhibits a weak correlation between high topography and low-velocity anomalies of P and S waves. Consequently, the correlation of topography versus average relative traveltime residuals in four regions of proposed Cenozoic epeirogenic uplift reveals positive correlation only in southern Norway and negative or absence of correlation in other regions. These results show that high topography does not correlate with the inferred velocity structure of the upper mantle in the North Atlantic realm. Consequently, our findings weaken the hypothesis of dynamic topography and epeirogenic uplift of the Atlantic margins during the Late Cenozoic.

AB - The traveltime residuals of 393 receiver sites with more than 21,000 P wave and 9,700 S wave arrivals are used to investigate the upper-mantle P and S wave velocity structure down to the depth of 500 km beneath the regions of high topography of the North Atlantic Caledonian crust. In east Greenland, we observe high-velocity anomalies beneath high topography. In northern Norway and Sweden, a stable thick lithosphere beneath both the high topography and the Baltic shield exists. Only southern Norway exhibits a weak correlation between high topography and low-velocity anomalies of P and S waves. Consequently, the correlation of topography versus average relative traveltime residuals in four regions of proposed Cenozoic epeirogenic uplift reveals positive correlation only in southern Norway and negative or absence of correlation in other regions. These results show that high topography does not correlate with the inferred velocity structure of the upper mantle in the North Atlantic realm. Consequently, our findings weaken the hypothesis of dynamic topography and epeirogenic uplift of the Atlantic margins during the Late Cenozoic.

KW - Caledonian mountains

KW - dynamics of lithosphere and mantle

KW - Greenland

KW - North Atlantic

KW - Northwestern Europe

KW - upper-mantle velocity structure

UR - http://www.scopus.com/inward/record.url?scp=85091459903&partnerID=8YFLogxK

U2 - 10.1029/2020JB019808

DO - 10.1029/2020JB019808

M3 - Journal article

AN - SCOPUS:85091459903

VL - 125

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 9

M1 - e2020JB019808

ER -