Global Sub-Crustal Stress Field
2016 (English)In: Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment / [ed] Raju, N. Janardhana, Springer International Publishing , 2016, 461-465 p.Chapter in book (Other academic)Text
The sub-crustal stress has been traditionally computed using the Runcorn's formulae. This method allows computing the stress field only with a very limited spectral resolution. To overcome this problem, we apply a new method of computing the sub-crustal stress components based on utilizing the stress function with a subsequent numerical differentiation. This method increases the (degree-dependent) convergence domain of the asymptotically-convergent series and consequently allows evaluating the stress components to a higher spectral resolution compatible with currently available global crustal models. This method also facilitates the variable Moho geometry, instead of assuming only a constant Moho depth in the Runcorn's formulae. The crustal thickness and the sub-crustal stress are then determined directly from gravity and (seismic) crustal structure models. The numerical result reveals that the largest intensity of the sub-crustal stress occurs mainly along seismically active convergent tectonic plate boundaries, particularly along oceanic subduction zones and continent-to-continent collision zones.
Place, publisher, year, edition, pages
Springer International Publishing , 2016. 461-465 p.
Crust, Gravity; Stress, Moho
IdentifiersURN: urn:nbn:se:hv:diva-8772DOI: 10.1007/978-3-319-18663-4_70ISBN: 978-3-319-18662-7OAI: oai:DiVA.org:hv-8772DiVA: diva2:877934