You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
Quaternary deformation of the Bajo Segura blind
fault (eastern Betic Cordillera, Spain) revealed by
high-resolution reflection profiling
Contributor:
ALFARO, P.;
ANDREU, J. M.;
ANDREU, J. M.;
ESTÉVEZ, A.;
SORIA, J. M.;
TEIXIDÓ, T.
imprint:
Cambridge University Press (CUP), 2002
Published in:Geological Magazine
Language:
English
DOI:
10.1017/s0016756802006568
ISSN:
0016-7568;
1469-5081
Origination:
Footnote:
Description:
<jats:p>The blind reverse Bajo Segura Fault is located at the eastern extreme of the Trans-Alboran
shear zone (Betic Cordillera, southeast Iberian Peninsula). The surface expression of recent activity of
this blind ENE–WSW fault is represented by coseismic surface anticlines and growth synclines on
both sides of the anticlines. In the synclines, the deformation of the most recent Quaternary materials
is obscured by a sedimentary unit more than 30 m thick which was deposited during the later part of
the Late Pleistocene and the Holocene. The present study reports three high-resolution seismic profiles
made in the northern growth syncline, which was the one developed most by the Bajo Segura Fault. In
these seismic profiles we recognize the boundary between pre-growth strata and growth strata. This
marker, Early Pliocene in age, dates the start of the activity of this blind reverse fault. The geometry
observed in the seismic profiles of the syntectonic strata, dating from the Late Pliocene and
Quaternary, indicates a limb rotation folding mechanism. On seismic profile 2, the complex geometry
of the Benejúzar anticline forelimb can be attributed to several splay faults close to the surface of Bajo
Segura Fault.</jats:p>