Open AccessAn anisotropic model of the Earth's crust in the Baikal rift zone
Author(s) -
Maslova S. I.,
Obolentseva I. R.
Publication year - 1984
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1984.tb05039.x
Subject(s) - anisotropy , geology , crust , rift , isotropy , rift zone , geophysics , amphibole , metamorphic rock , earth (classical element) , seismic anisotropy , petrology , seismology , paleontology , mantle (geology) , tectonics , optics , physics , quartz , mathematical physics
Summary. An attempt is made to explain the existence of intracrustal low‐velocity layers in rift zones by using an anisotropic model. It is supposed that the anisotropy is due to the preferred orientation of micas and amphiboles in metamorphic rocks forming the upper crust. Analysing the velocity distribution along different directions in anisotropic media the authors conclude that the low‐velocity layer must be isotropic (randomly oriented) with an anisotropic lid.