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Implications of new gravity data for Baikal rift zone structure
Author(s) -
Ruppel C.,
Kogan M. G.,
McNutt M. K.
Publication year - 1993
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl01873
Subject(s) - rift , geology , bouguer anomaly , rift zone , gravity anomaly , seismology , anomaly (physics) , magnetic anomaly , geophysics , tectonics , paleontology , physics , condensed matter physics , oil field
Newly available, 2D Bouguer gravity anomaly data from the Baikal Rift zone, Siberia, indicate that this discrete, intracontinental rift system is regionally compensated by an elastic plate ∼50 km thick. However, spectral and spatial domain analyses and isostatic anomaly calculations show that simple elastic plate theory does not offer an adequate explanation for compensation in the rift zone, probably because of significant lateral variations in plate strength and the presence of subsurface loads. Our results and other geophysical observations support the interpretation that the Baikal Rift zone is colder than either the East African or Rio Grande rift.