Mathematics – Logic
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992e%26psl.110..163t&link_type=abstract
Earth and Planetary Science Letters, Volume 110, Issue 1-4, p. 163-171.
Mathematics
Logic
16
Scientific paper
Geological and geophysical data are used to demonstrate the existence of intracrustal high-density/high P-wave velocity bodies in the western Betics. These bodies appear to correspond to buried peridotites similar to those that outcrop in the Ronda area. A gravity study shows how the gravity field is mainly the result of a combined effect of crustal thinning and the presence of ultramafic bodies. The size of the buried high-density body, as interpreted from gravity and seismic results, shows maximum dimensions of about 40 km in length (NNW-SSE), about 8 km in thickness, and a lateral extension (ENE-WSW) of about 70 km. The thinning of the crust from 32-35 km to 20-22 km takes place in a narrow area less than 35 km wide. Our results are compatible with an interpretation in terms of an unrooted peridotite slab. Dismembering of an initial slab of ultramafic rocks is a possible consequence of the extensional regime that originated the Alboran basin.
Balanyá J. C.
Banda E.
García-Dueñas V.
Torne Montse
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