Universität zu Köln

Simon, Jose L., Ezquerro, Lope, Arlegui, Luis E., Liesa, Carlos L., Luzon, Aranzazu, Medialdea, Alicia ORCID: 0000-0001-5895-0736, Garcia, Alberto and Zarazaga, Daniel (2019). Role of transverse structures in paleoseismicity and drainage rearrangement in rift systems: the case of the Valdecebro fault zone (Teruel graben, eastern Spain). Int. J. Earth Sci., 108 (5). S. 1429 - 1450. NEW YORK: SPRINGER. ISSN 1437-3262

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Abstract

The E-W trending, nearly pure extensional Valdecebro fault zone is a transverse structure at the central sector of the N-S Teruel graben. It was activated by the Late Ruscinian (Early Pliocene, ca. 3.7Ma), giving rise to structural rearrangement of the graben margin. Until the Late Pleistocene, it has accommodated a net slip ca. 205m, with slip rate of 0.055mm/a. Paleoseismicity has been analysed in a 29-m-long, 5-m-deep trench excavated through a fault branch that offsets a Pleistocene pediment surface. The paleoseismic succession includes a minimum of 6-7 events occurred since ca. 142ka BP, although a model with 12 events could be more realistic. The following paleoseismic parameters have been inferred, assuming a minimum of 6 and a maximum of 12 events: average coseismic slip=58-117cm; recurrence period=8.4-28.4ka; potential moment magnitude M-w=5.8-5.9. The recorded displacement since ca. 142ka BP totalizes 7.0m, with slip rate of 0.05-0.07mm/a. Slip on the transverse Valdecebro fault zone has critically contributed to bulk deformation under a prevailing multidirectional' extensional regime. Drainage patterns have been rearranged, recurrently switching between westward and southward directions as a consequence of diverse slip episodes at the Valdecebro fault zone (E-W) and the neighbouring La Hita (N-S) and Concud (NW-SE) faults. The ultimate westward drainage of the Valdecebro depression incised and dismantled a southward-sloping Pleistocene pediment sourced at the Valdecebro mountain front, representing a capture by the Alfambra river occurred between 124 and 22ka BP.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Simon, Jose L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ezquerro, Lope UNSPECIFIED UNSPECIFIED UNSPECIFIED Arlegui, Luis E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Liesa, Carlos L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Luzon, Aranzazu UNSPECIFIED UNSPECIFIED UNSPECIFIED Medialdea, Alicia UNSPECIFIED orcid.org/0000-0001-5895-0736 UNSPECIFIED Garcia, Alberto UNSPECIFIED UNSPECIFIED UNSPECIFIED Zarazaga, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-136362
DOI:	10.1007/s00531-019-01707-9
Journal or Publication Title:	Int. J. Earth Sci.
Volume:	108
Number:	5
Page Range:	S. 1429 - 1450
Date:	2019
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1437-3262
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SPACE-TIME DISTRIBUTION; IBERIAN CHAIN; BETIC CORDILLERA; STRESS-FIELD; BAZA FAULT; EBRO BASIN; CONCUD; MAGNITUDE; SINGLE; DEFORMATION Multiple languages Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13636