Upper mantle seismic discontinuities: Topography variations beneath Eastern Europe

Marzena Świeczak; Marek Grad; U. Achauer; J. Ansorge; R. Arlitt; A. Berthelsen; M. Budweg; H. Busche; N. Cotte; S. Gregersen; A. Guterch; J. Gossler; S. Hock; R. Kind; E. Kissling; M. Korn; K. Mosegaard; H. Paulssen; H. Pedersen; L.B. Pedersen; T. Pedersen; J. Plomerová; W. Rabbel; R.G. Roberts; H. Shomali; H. Thybo; P. Voss; F. Waldhauser; M. Wilde-Piórko; I. Woelbern; P. Ziegler; M. Zuchniak; A. Alinaghi; G. Bock; M. Bruneton; W. Friedrich; S.E. Hjelt; T. Hyvönen; J.P. Ikonen; K. Komminaho; A. Korja; P. Heikkinen; E. Kozlovskaya; M.V. Nevsky; N. Pavlenková; T. Raita; O. Riznichenko; S. Sandoval; I.A. Sanina; N. Sharov; J. Tiikkainen; S.G. Volosov; E. Wielandt; K. Wylegalla; J. Yliniemi; Y. Yurov

Upper mantle seismic discontinuities: Topography variations beneath Eastern Europe

Marzena Świeczak, Marek Grad, U. Achauer, J. Ansorge, R. Arlitt, A. Berthelsen, M. Budweg, H. Busche, N. Cotte, S. Gregersen, A. Guterch, J. Gossler, S. Hock, R. Kind, E. Kissling, M. Korn, K. Mosegaard, H. Paulssen, H. Pedersen, L.B. PedersenT. Pedersen, J. Plomerová, W. Rabbel, R.G. Roberts, H. Shomali, H. Thybo, P. Voss, F. Waldhauser, M. Wilde-Piórko, I. Woelbern, P. Ziegler, M. Zuchniak, A. Alinaghi, G. Bock, M. Bruneton, W. Friedrich, S.E. Hjelt, T. Hyvönen, J.P. Ikonen, K. Komminaho, A. Korja, P. Heikkinen, E. Kozlovskaya, M.V. Nevsky, N. Pavlenková, T. Raita, O. Riznichenko, S. Sandoval, I.A. Sanina, N. Sharov, J. Tiikkainen, S.G. Volosov, E. Wielandt, K. Wylegalla, J. Yliniemi, Y. Yurov

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Abstract

The structure of the mantle transition zone between two seismic discontinuities at depths near 410 and 660 km is one of the most important issues to understand the Earth's dynamics. Most of what we know about this zone is based on seismic interpretation. Seismic waves observed in the distance range of about 15-28° turn in the transition zone and give us information about structural details of penetrated region. We present new results on the upper mantle velocity structure beneath Eastern Europe obtained from individual earthquakes for which seismic data has been collected during two passive experiments, TOR and SVEKALAPKO. Comparison with the earlier models describing the upper mantle velocity structure allowed to study lateral changes in the topography of the 410 and 660 discontinuities. Variations in the average thickness of the transition region are thought to reflect variations in the mantle temperature. We cannot exclude non-thermal effects occurring in the Earth's mantle but the thickness of the transition zone may be a useful thermometer for indication of lateral temperature variations. The size of velocity jumps could be translated into chemical composition, mainly for olivine content at discontinuity.

Original language	English
Pages (from-to)	251-270
Number of pages	20
Journal	Acta Geophysica Polonica
Volume	52
Issue number	3
Publication status	Published - 2004
Externally published	Yes

Keywords

410-km and 660-km discontinuities
Passive experiment
SVEKALAPKO
TOR
Upper mantle transition zone

Programme Area

Programme Area 3: Energy Resources

Cite this

Świeczak, M., Grad, M., Achauer, U., Ansorge, J., Arlitt, R., Berthelsen, A., Budweg, M., Busche, H., Cotte, N., Gregersen, S., Guterch, A., Gossler, J., Hock, S., Kind, R., Kissling, E., Korn, M., Mosegaard, K., Paulssen, H., Pedersen, H., ... Yurov, Y. (2004). Upper mantle seismic discontinuities: Topography variations beneath Eastern Europe. Acta Geophysica Polonica, 52(3), 251-270.

@article{a0f50720b29f4fed815e73dea3d45683,

title = "Upper mantle seismic discontinuities: Topography variations beneath Eastern Europe",

abstract = "The structure of the mantle transition zone between two seismic discontinuities at depths near 410 and 660 km is one of the most important issues to understand the Earth's dynamics. Most of what we know about this zone is based on seismic interpretation. Seismic waves observed in the distance range of about 15-28° turn in the transition zone and give us information about structural details of penetrated region. We present new results on the upper mantle velocity structure beneath Eastern Europe obtained from individual earthquakes for which seismic data has been collected during two passive experiments, TOR and SVEKALAPKO. Comparison with the earlier models describing the upper mantle velocity structure allowed to study lateral changes in the topography of the 410 and 660 discontinuities. Variations in the average thickness of the transition region are thought to reflect variations in the mantle temperature. We cannot exclude non-thermal effects occurring in the Earth's mantle but the thickness of the transition zone may be a useful thermometer for indication of lateral temperature variations. The size of velocity jumps could be translated into chemical composition, mainly for olivine content at discontinuity.",

keywords = "410-km and 660-km discontinuities, Passive experiment, SVEKALAPKO, TOR, Upper mantle transition zone",

author = "Marzena {\'S}wieczak and Marek Grad and U. Achauer and J. Ansorge and R. Arlitt and A. Berthelsen and M. Budweg and H. Busche and N. Cotte and S. Gregersen and A. Guterch and J. Gossler and S. Hock and R. Kind and E. Kissling and M. Korn and K. Mosegaard and H. Paulssen and H. Pedersen and L.B. Pedersen and T. Pedersen and J. Plomerov{\'a} and W. Rabbel and R.G. Roberts and H. Shomali and H. Thybo and P. Voss and F. Waldhauser and M. Wilde-Pi{\'o}rko and I. Woelbern and P. Ziegler and M. Zuchniak and A. Alinaghi and G. Bock and M. Bruneton and W. Friedrich and S.E. Hjelt and T. Hyv{\"o}nen and J.P. Ikonen and K. Komminaho and A. Korja and P. Heikkinen and E. Kozlovskaya and M.V. Nevsky and N. Pavlenkov{\'a} and T. Raita and O. Riznichenko and S. Sandoval and I.A. Sanina and N. Sharov and J. Tiikkainen and S.G. Volosov and E. Wielandt and K. Wylegalla and J. Yliniemi and Y. Yurov",

year = "2004",

language = "English",

volume = "52",

pages = "251--270",

journal = "Acta Geophysica Polonica",

issn = "0001-5725",

publisher = "Springer",

number = "3",

}

Świeczak, M, Grad, M, Achauer, U, Ansorge, J, Arlitt, R, Berthelsen, A, Budweg, M, Busche, H, Cotte, N, Gregersen, S, Guterch, A, Gossler, J, Hock, S, Kind, R, Kissling, E, Korn, M, Mosegaard, K, Paulssen, H, Pedersen, H, Pedersen, LB, Pedersen, T, Plomerová, J, Rabbel, W, Roberts, RG, Shomali, H, Thybo, H, Voss, P, Waldhauser, F, Wilde-Piórko, M, Woelbern, I, Ziegler, P, Zuchniak, M, Alinaghi, A, Bock, G, Bruneton, M, Friedrich, W, Hjelt, SE, Hyvönen, T, Ikonen, JP, Komminaho, K, Korja, A, Heikkinen, P, Kozlovskaya, E, Nevsky, MV, Pavlenková, N, Raita, T, Riznichenko, O, Sandoval, S, Sanina, IA, Sharov, N, Tiikkainen, J, Volosov, SG, Wielandt, E, Wylegalla, K, Yliniemi, J & Yurov, Y 2004, 'Upper mantle seismic discontinuities: Topography variations beneath Eastern Europe', Acta Geophysica Polonica, vol. 52, no. 3, pp. 251-270.

TY - JOUR

T1 - Upper mantle seismic discontinuities

T2 - Topography variations beneath Eastern Europe

AU - Świeczak, Marzena

AU - Grad, Marek

AU - Achauer, U.

AU - Ansorge, J.

AU - Arlitt, R.

AU - Berthelsen, A.

AU - Budweg, M.

AU - Busche, H.

AU - Cotte, N.

AU - Gregersen, S.

AU - Guterch, A.

AU - Gossler, J.

AU - Hock, S.

AU - Kind, R.

AU - Kissling, E.

AU - Korn, M.

AU - Mosegaard, K.

AU - Paulssen, H.

AU - Pedersen, H.

AU - Pedersen, L.B.

AU - Pedersen, T.

AU - Plomerová, J.

AU - Rabbel, W.

AU - Roberts, R.G.

AU - Shomali, H.

AU - Thybo, H.

AU - Voss, P.

AU - Waldhauser, F.

AU - Wilde-Piórko, M.

AU - Woelbern, I.

AU - Ziegler, P.

AU - Zuchniak, M.

AU - Alinaghi, A.

AU - Bock, G.

AU - Bruneton, M.

AU - Friedrich, W.

AU - Hjelt, S.E.

AU - Hyvönen, T.

AU - Ikonen, J.P.

AU - Komminaho, K.

AU - Korja, A.

AU - Heikkinen, P.

AU - Kozlovskaya, E.

AU - Nevsky, M.V.

AU - Pavlenková, N.

AU - Raita, T.

AU - Riznichenko, O.

AU - Sandoval, S.

AU - Sanina, I.A.

AU - Sharov, N.

AU - Tiikkainen, J.

AU - Volosov, S.G.

AU - Wielandt, E.

AU - Wylegalla, K.

AU - Yliniemi, J.

AU - Yurov, Y.

PY - 2004

Y1 - 2004

N2 - The structure of the mantle transition zone between two seismic discontinuities at depths near 410 and 660 km is one of the most important issues to understand the Earth's dynamics. Most of what we know about this zone is based on seismic interpretation. Seismic waves observed in the distance range of about 15-28° turn in the transition zone and give us information about structural details of penetrated region. We present new results on the upper mantle velocity structure beneath Eastern Europe obtained from individual earthquakes for which seismic data has been collected during two passive experiments, TOR and SVEKALAPKO. Comparison with the earlier models describing the upper mantle velocity structure allowed to study lateral changes in the topography of the 410 and 660 discontinuities. Variations in the average thickness of the transition region are thought to reflect variations in the mantle temperature. We cannot exclude non-thermal effects occurring in the Earth's mantle but the thickness of the transition zone may be a useful thermometer for indication of lateral temperature variations. The size of velocity jumps could be translated into chemical composition, mainly for olivine content at discontinuity.

AB - The structure of the mantle transition zone between two seismic discontinuities at depths near 410 and 660 km is one of the most important issues to understand the Earth's dynamics. Most of what we know about this zone is based on seismic interpretation. Seismic waves observed in the distance range of about 15-28° turn in the transition zone and give us information about structural details of penetrated region. We present new results on the upper mantle velocity structure beneath Eastern Europe obtained from individual earthquakes for which seismic data has been collected during two passive experiments, TOR and SVEKALAPKO. Comparison with the earlier models describing the upper mantle velocity structure allowed to study lateral changes in the topography of the 410 and 660 discontinuities. Variations in the average thickness of the transition region are thought to reflect variations in the mantle temperature. We cannot exclude non-thermal effects occurring in the Earth's mantle but the thickness of the transition zone may be a useful thermometer for indication of lateral temperature variations. The size of velocity jumps could be translated into chemical composition, mainly for olivine content at discontinuity.

KW - 410-km and 660-km discontinuities

KW - Passive experiment

KW - SVEKALAPKO

KW - TOR

KW - Upper mantle transition zone

UR - http://www.scopus.com/inward/record.url?scp=4744365076&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:4744365076

SN - 0001-5725

VL - 52

SP - 251

EP - 270

JO - Acta Geophysica Polonica

JF - Acta Geophysica Polonica

IS - 3

ER -

Upper mantle seismic discontinuities: Topography variations beneath Eastern Europe

Abstract

Keywords

Programme Area

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