Gravity inversion mapping of crustal thickness and lithosphere thinning for the eastern Mediterranean

2012 ◽  
Vol 31 (7) ◽  
pp. 810-814 ◽  
Author(s):  
Leanne Cowie ◽  
Nick Kusznir
Keyword(s):  
Eastern Mediterranean ◽  
Crustal Thickness ◽  
Gravity Inversion ◽  
Lithosphere Thinning

ArcCRUST: Arctic Crustal Thickness From 3‐D Gravity Inversion

2019 ◽  
Vol 20 (7) ◽  
pp. 3225-3247 ◽  
Author(s):  
Nina Lebedeva‐Ivanova ◽  
Carmen Gaina ◽  
Alexander Minakov ◽  
Sergey Kashubin
Keyword(s):  
Crustal Thickness ◽  
Gravity Inversion

Aegean crustal thickness inferred from gravity inversion. Geodynamical implications

2004 ◽  
Vol 228 (3-4) ◽  
pp. 267-280 ◽  
Author(s):  
Céline Tirel ◽  
Frédéric Gueydan ◽  
Christel Tiberi ◽  
Jean-Pierre Brun
Keyword(s):  
Crustal Thickness ◽  
Gravity Inversion

scholarly journals Moho Geometry of the Okinawa Trough Based on Gravity Inversion and Its Implications on the Crustal Nature and Tectonic Evolution

2021 ◽  
Vol 9 ◽  
Author(s):  
Liang Zhang ◽  
Xiwu Luan
Keyword(s):  
Early Stage ◽  
Okinawa Trough ◽  
High Heat ◽  
Crustal Thickness ◽  
Moho Depth ◽  
Gravity Inversion ◽  
The Okinawa Trough ◽  
Oceanic Spreading ◽  
Thickness Variations ◽  
Back Arc

The Okinawa Trough (OT) is an incipient back-arc basin, but its crustal nature is still controversial. Gravity inversion along with sediment and lithospheric mantle density modeling are used to map the regional Moho depth and crustal thickness variations of the OT and its adjacent areas. The gravity inversion result shows that the crustal thicknesses are 17–22 km at the northern OT, 11–19 km at the central OT, and 7–19 km at the southern OT. Because of the crust with a thickness larger than 17 km, the slow southward arc movement, and scarce contemporaneous volcanisms, the northern OT should be in the stage of early back-arc extension. All of the moderate crustal thickness, high heat flow, and intense volcanism at the central OT indicate that this region is probably in the transitional stage from the back-arc rifting to the oceanic spreading. A crust that is only 7 km thick, lithosphere strength as low as the mid-ocean ridge, and MORB-similar basalts at the southern OT demonstrate that the southern OT is at the early stage of seafloor spreading.

scholarly journals Inverse and forward gravity modeling for revealing the crustal structure of Volga-Uralian subcraton

2021 ◽  
Author(s):  
Igor Ognev ◽  
Jörg Ebbing ◽  
Peter Haas
Keyword(s):  
Lower Crust ◽  
Sedimentary Cover ◽  
Central Area ◽  
Crustal Thickness ◽  
Gravity Modeling ◽  
Gravity Inversion ◽  
Thickness Variation ◽  
Rift System ◽  
Ural Mountains ◽  
Crustal Model

<p>A new crustal model of the Volga-Uralian subcraton was built. The compilation of the model was subdivided in two steps: (1) inverse gravity modeling followed by (2) thorough forward gravity modeling.</p><p>For inverse gravity modeling GOCE gravity gradients were used. The effect of the Earth sphericity was taken into account by using tesseroids. Density contrasts between crust and mantle were varied laterally according to the tectonic units present in the region.  The model is constrained by the available seismic data including receiver function studies, and deep reflection and refraction profiles.</p><p>The Moho discontinuity obtained during the gravity inversion was consequently modified, and complemented by the sedimentary cover, upper crust, lower crust, and lithospheric mantle layers in the process of forward gravity modeling. Obtained model showed crustal thickness variation from 34 to more than 55 km in some areas. The thinnest crust with the thickness below 40 km appeared on the Pericaspian basin with the thickest sedimentary column. A relatively thin crust was found along the central Russia rift system, while the thickest crust is located underneath Ural Mountains as well as in the center of the Volga-Uralian subcraton. In both areas the crustal thickness exceeds 50 km. At the same time, the gravity misfit of ca. 95 mGal between the measured Bouguer gravity anomaly and forward calculated gravity field was revealed in the central area of the Volga-Uralian subcraton. This misfit was interpreted and modeled as high-density lower crust which can possibly represent an underplated material.</p><p>In the end, the new crustal model of Volga-Uralian subcraton respects the gravity and seismic constraints, and reflects the main geological features of the region. This model will be used for further geothermal analysis of the area.</p>

scholarly journals South China Sea crustal thickness and oceanic lithosphere distribution from satellite gravity inversion

2018 ◽  
Vol 25 (1) ◽  
pp. 112-128 ◽  
Author(s):  
Simon Gozzard ◽  
Nick Kusznir ◽  
Dieter Franke ◽  
Andrew Cullen ◽  
Paul Reemst ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Oceanic Lithosphere ◽  
Crustal Thickness ◽  
Gravity Inversion ◽  
Satellite Gravity ◽  
China Sea
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