Ventaniella: ES201

Identification - compilation

Identification

Identification code :

ES201

Fault name :

Ventaniella

Section name :

Suroriental

Identification method :

Geological/Geomorphological field mapping

Geological and geographical set :

Basque-Cantabrian Basin and Duero Basin (Palencia and Burgos)

Compilation

Name/s of the compiler/s :

Martín Banda, R. and García Mayordomo, J.

Filiation/s :

Universidad Complutense de Madrid and IGME

E-mail :

raquem08@ucm.es; Julian.Garcia@igme.es

Latest update :

2014-08-26

Location

Geometry and kinematics

Conventions

Variability/Error

Source

Brief comment

Average strike (º) :

117

Variability/Error:

± 3

Source:

Brief comment:

Compiler's measurement based on Nozal and Gracia (1990), IGME y ENRESA (1998), Tavani et al (2011). According to Tavani etal (2011) Ubierna and Ventaniella faults form part of the same shear zone, about 15 km wide, and called it the Ubierna Fault System.

Dip (º) :

Variability/Error:

80-90

Source:

Brief comment:

Sub-vertical. Nozal and Gracia (1990), IGME y ENRESA (1998), Tavani et al. (2011).

Rake (º) :

180

Variability/Error:

to 135

Source:

Brief comment:

Tavani et al. (2011). Slightly transpressive.

Sense of movement :

Variability/Error:

to DR

Source:

Brief comment:

Tavani et al. (2011). Slightly transpressive.

Length (km) :

Variability/Error:

25-40

Source:

Brief comment:

Compiler's measurement based on Mapa Neotectónico de España, for the Quaternary trace of the Ventaniella fault (IGME y ENRESA, 1998). Fault may extend further to the SE according to Tavani et al. (2011).

Min depth (km) :

Variability/Error:

0-1

Source:

Brief comment:

Nozal y Gracia (1990), IGME y ENRESA (1998), Tavani et al. (2011).

Max depth (km) :

Variability/Error:

to 14

Source:

Brief comment:

Tavani et al. (2011) based on seismicity depth distribution.

Width (km) :

16.061

Variability/Error:

Source:

Brief comment:

Area (km²) :

626.384

Variability/Error:

Source:

Brief comment:

Quaternary activity Strength: C

Variability/Error

Source

Brief comment

Quaternary activity evidence :

1) Morphologic lineament 2) It offsets early Pleistocene alluvial fan deposits 3) Possible association to seismic epicentres.

Variability/Error:

Source:

Brief comment:

Nozal and Gracia (1990), IGME y ENRESA (1998), Tavani et al. (2011).

Age of the youngest deposits or landforms affected by the fault :

Lower Pleistocene

Variability/Error:

Source:

Brief comment:

According to Nozal and Gracia (1990) the fault is sealed by younger fans, Middle to Upper Pleistocene in age. There are no radiometric dating for the Quaternary formations in the area.

Slip rate Accuracy: C

Variability/Error

Source

Brief comment

Vertical Slip Rate VSR (m/ky) :

Variability/Error:

Source:

Brief comment:

VSR=0, assumed pure strike-slip faulting.

Horizontal Slip Rate HSR (m/ky) :

0.05

Variability/Error:

0.10 - 0.01

Source:

Brief comment:

0.1 and 0.01 are extreme values assumed by Villamor et al. (2012) for a seismic hazard calculation (Villamor, 2002).

Net Slip Rate NSR (m/ky) :

0.05

Variability/Error:

0.10 - 0.01

Source:

Brief comment:

0.1 and 0.01 are extreme values assumed by Villamor et al. (2012) for a seismic hazard calculation (Villamor, 2002).

Paleoearthquakes

Variability/Error

Source

Brief comment

Net slip per event at the Surface (m) :

Variability/Error:

Source:

Brief comment:

Unknown

Number of Seismic Events :

Variability/Error:

Source:

Brief comment:

Unknown

Evidence of aseismic creep? :

Variability/Error:

Source:

Brief comment:

Unknown

Seismic parameters

Variability/Error

Source

Brief comment

Maximum magnitude (Mw) :

Variability/Error:

Source:

Brief comment:

Unstated

Recurrence interval (years) :

Variability/Error:

Source:

Brief comment:

Unstated

Date of last major earthquake (years) :

Variability/Error:

Source:

Brief comment:

Unknown

Extended data and references

References :

IGME and ENRESA (1998a): Neotectonic Map of Spain, scale 1:1.000.000.

IGME and ENRESA (1998b): Memory of the Neotectonic and Seismotectonic Map of Spain, scale 1:1.000.000. Vol.1

Nozal, F., and Gracia , F.J. (1990): El piedemonte de la Sierra del Brezo (Montes Palentinos). Primera Reunión Nacional de Geomorfología, Teruel: 763-772.

Stirling, M., Rhoades, D. and Berryman K. (2002): Comparison of Earthquake Scaling Relations Derived from Data of the Instrumental and Preinstrumental Era. Bulletin of the Seismological Society of America, 92 (2): 812–830.

Tavani, S., Quintà, A., and Granado, P. (2011): Cenozoic right-lateral wrench tectonics in the Western Pyrenees (Spain): The Ubierna Fault System. Tectonophysics, 509, 238–253.

Villamor, P. (2002) "Cinemática terciaria y cuaternaria de la falla de Alentejo Plasencia y su influencia en la peligrosidad sísmica del interior de la Peninsula Ibérica" PhD Thesis. UCM. 343p

Villamor, P., Capote, R., Stirling, M.W., Tsige, M., Berryman, K.R., Martínez-Díaz, J.J., and Martín-González, F (2012): Contribution of active faults in the intraplate area of Iberia to seismic hazard: The Alentejo-Plasencia Fault. Journal of Iberian Geology, 38 (1), 85-111.

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