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  A new global crust model: ECM22

Lu, B., van der Meijde, M., Fadel, I., Carlos Afonso, J., Reguzzoni, M., Rossi, L., Sampietro, D., Cammarano, F., Julia, J. (2023): A new global crust model: ECM22, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1846

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017737 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017737_2
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 Urheber:
Lu, Biao1, Autor
van der Meijde, Mark1, Autor
Fadel, Islam1, Autor
Carlos Afonso, Juan1, Autor
Reguzzoni, Mirko1, Autor
Rossi, Lorenzo1, Autor
Sampietro, Daniele1, Autor
Cammarano, Fabio1, Autor
Julia, Jordi1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Zusammenfassung: Despite 160 years of probing the world crust, due to lack of seismic and ground gravity observations, there are still white spots in the worlds' crustal thickness map. The crustal structure in those regions is among the least understood of the Earth's continental areas, and variations in basic but fundamental parameters - such as crustal thickness - are still poorly constrained over large areas. Recent research has shown that satellite gravity-based crustal modeling in regions with limited seismological coverage can provide unique insights in crustal thickness and underlying geodynamical processes.<p>In almost all of these cases the gravity signal related to crustal structure is isolated by applying 3 different corrections: topography, sediments, and upper mantle structure.&nbsp;<p>Of these three, the upper mantle correction is least well addressed. It doesn’t account for any lateral inhomogeneity upper mantle composition close to the crust-mantle boundary. As a result, satellite gravity data reductions for upper mantle structure are a source of uncertainty.&nbsp;<p>Our new model includes a new state-of-the-art upper mantle correction. By combining satellite gravity and seismic tomography, we have formulated a new methodology to integrate potential field data inversions, tomographic modelling, and petrolophysics into a single inversion scheme. Our crustal thickness model ECM22 has therefore more accurate crustal thickness values, is seismically fitting better than previous models, and is now also consistent with gravity observations: up to a factor 85 times more accurate than e.g. CRUST1.0 and 4 times better than the GEMMA crustal model.&nbsp;

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Sprache(n): eng - Englisch
 Datum: 2023
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.57757/IUGG23-1846
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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
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