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Comparative Study of the Uniform and Variable Moho Density Contrast in the Vening Meinesz-Moritz’s Isostatic Scheme for the Gravimetric Moho Recovery
The Key Laboratory of Geospace Environment and GeodesySchool of Geodesy and Geomatics, Wuhan UniversityWuhanChina.
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för datavetenskap och samhällsbyggnad, Samhällsbyggnad. Division of Geodesy and Satellite Positioning. (Geodesy)ORCID-id: 0000-0003-0910-0596
2014 (engelsk)Inngår i: IGFS 2014, Proceedings of the 3rd International Gravity Field Service (IGFS), Shanghai, China, 30 June - 6 July 2014 / [ed] Shuanggen Jin, Riccardo Barzaghi, Springer, 2014, s. 199-207Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In gravimetric methods for a determination of the Moho geometry, the constant value of the Moho density contract is often adopted. Results of gravimetric and seismic studies, however, showed that the Moho density contrast varies significantly. The assumption of a uniform density contrast thus might yield large errors in the estimated Moho depths. In this study we investigate these errors by comparing the Moho depths determined globally for the uniform and variable models of the Moho density contrast. These two gravimetric results are obtained based on solving the Vening Meinesz-Moritz’s inverse problem of isostasy. The uniform model of the Moho density contrast is defined individually for the continental and oceanic lithosphere to better reproduce the reality. The global data of the lower crust and upper mantle retrieved from the CRUST1.0 seismic crustal model are used to define the variable Moho density contrast. This seismic model is also used to validate both gravimetric solutions. Results of our numerical experiment reveals that the consideration of the variable Moho density contrast improves the agreement between the gravimetric and seismic Moho models; the RMS of differences is 5.4 km (for the uniform density contrast) and 4.7 km (for the variable density contrast).

sted, utgiver, år, opplag, sider
Springer, 2014. s. 199-207
Serie
International Association of Geodesy Symposia, ISSN 0939-9585 ; 44
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-30668DOI: 10.1007/978-3-319-39820-4ISBN: 978-3-319-39819-8 (tryckt)ISBN: 978-3-319-81973-0 (tryckt)OAI: oai:DiVA.org:hig-30668DiVA, id: diva2:1352637
Konferanse
3rd International Gravity Field Service (IGFS), Shanghai, China, 30 June - 6 July 2014
Tilgjengelig fra: 2019-09-19 Laget: 2019-09-19 Sist oppdatert: 2019-09-26bibliografisk kontrollert

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