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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.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences. Division of Geodesy and Satellite Positioning. (Geodesy)ORCID iD: 0000-0003-0910-0596
2014 (English)In: 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, p. 199-207Conference paper, Published paper (Refereed)
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).

Place, publisher, year, edition, pages
Springer, 2014. p. 199-207
Series
International Association of Geodesy Symposia, ISSN 0939-9585 ; 44
National Category
Other Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:hig:diva-30668DOI: 10.1007/978-3-319-39820-4ISBN: 978-3-319-39819-8 (print)ISBN: 978-3-319-81973-0 (print)OAI: oai:DiVA.org:hig-30668DiVA, id: diva2:1352637
Conference
3rd International Gravity Field Service (IGFS), Shanghai, China, 30 June - 6 July 2014
Available from: 2019-09-19 Created: 2019-09-19 Last updated: 2019-09-26Bibliographically approved

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Bagherbandi, Mohammad

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