scholarly journals Concealed Quaternary strike-slip fault resolved with airborne lidar and seismic reflection: The Grizzly Valley fault system, northern Walker Lane, California

2013 ◽  
Vol 118 (7) ◽  
pp. 3753-3766 ◽  
Author(s):  
Ryan D. Gold ◽  
William J. Stephenson ◽  
Jack K. Odum ◽  
Richard W. Briggs ◽  
Anthony J. Crone ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Airborne Lidar ◽  
Fault System ◽  
Walker Lane

scholarly journals Late Quaternary slip rates for faults of the central Walker Lane (Nevada, USA): Spatiotemporal strain release in a strike-slip fault system

Geosphere ◽  
2019 ◽  
Vol 15 (5) ◽  
pp. 1460-1478 ◽  
Author(s):  
Stephen J. Angster ◽  
Steven G. Wesnousky ◽  
Paula M. Figueiredo ◽  
Lewis A. Owen ◽  
Sarah J. Hammer
Keyword(s):  
Late Pleistocene ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Luminescence Dating ◽  
Slip Distribution ◽  
Fault System ◽  
Slip Rates ◽  
Walker Lane ◽  
Fault Systems ◽  
Late Pleistocene To Holocene

Abstract The Walker Lane is a broad shear zone that accommodates a significant portion of North American–Pacific plate relative transform motion through a complex of fault systems and block rotations. Analysis of digital elevation models, constructed from both lidar data and structure-from-motion modeling of unmanned aerial vehicle photography, in conjunction with 10Be and 36Cl cosmogenic and optically stimulated luminescence dating define new Late Pleistocene to Holocene minimum strike-slip rates for the Benton Springs (1.5 ± 0.2 mm/yr), Petrified Springs (0.7 ± 0.1 mm/yr), Gumdrop Hills (0.9 +0.3/−0.2 mm/yr), and Indian Head (0.8 ± 0.1 mm/yr) faults of the central Walker Lane (Nevada, USA). Regional mapping of the fault traces within Quaternary deposits further show that the Indian Head and southern Benton Springs faults have had multiple Holocene ruptures, with inferred coseismic displacements of ∼3 m, while absence of displaced Holocene deposits along the Agai Pah, Gumdrop Hills, northern Benton Springs, and Petrified Springs faults suggest they have not. Combining these observations and comparing them with geodetic estimates of deformation across the central Walker Lane, indicates that at least one-third of the ∼8 mm/yr geodetic deformation budget has been focused across strike-slip faults, accommodated by only two of the five faults discussed here, during the Holocene, and possibly half from all the strike-slip faults during the Late Pleistocene. These results indicate secular variations of slip distribution and irregular recurrence intervals amongst the system of strike-slip faults. This makes the geodetic assessment of fault slip rates and return times of earthquakes on closely spaced strike-slip fault systems challenging. Moreover, it highlights the importance of understanding temporal variations of slip distribution within fault systems when comparing geologic and geodetic rates. Finally, the study provides examples of the importance and value in using observations of soil development in assessing the veracity of surface exposure ages determined with terrestrial cosmogenic nuclide analysis.

scholarly journals ​Near-Surface High Resolution Characterization of the Seismogenic Alhama de Murcia Strike-slip Fault 

2021 ◽  
Author(s):  
Handoyo Handoyo ◽  
Imma Palomeras ◽  
Juan Alcalde ◽  
Irene de Felipe ◽  
David Martí ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Broad Band ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Fault System ◽  
Seismogenic Zone ◽  
Maximum Magnitude ◽  
Near Surface ◽  
Velocity Models ◽  
Seismic Reflection Profiles

<p><span><span>In Spring 2011 (11</span><sup><span>th</span></sup><span> of May), the vicinity of Lorca city (Murcia, SE Iberian Peninsula) was hit by two main seismic shocks that reach a maximum magnitude of 5.2 Mw. The earthquake caused serious widespread damage in the city and its surroundings. Similar events have affected the area regularly in the past (for example: on May 6,</span><sup></sup><span>1977, 4.2 mg). These events are distributed along a relatively broad band (roughly NE-SW oriented) parallel to the coast,</span> <span>associated to the activation of the Alhama de Murcia Fault (AMF), an oblique-slip (reverse-strike-slip) fault system located in the Eastern Betics Shear Zone. The current study aims to characterize the shallow subsurface across some of the surface outcrop of a few of the main faults that lie within this seismogenic strike-slip fault system. Six normal-incidence seismic reflection profiles were acquired in the area crossing the AMF and the Carrascoy fault, among others). This study focuses on the determination of the shear-wave velocity depth model by applying Multichannel Analysis of Surface Waves (MASW), using the shot records of the seismic reflection profiles. The 1D velocity-depth functions acquired were pasted together to obtain the final 2D velocity models. The hand-picked dispersion curves were inverted using two different approaches to address the consistency of the inversion schemes. The final models reveal relevant differences across the different fault zones, reflecting the heterogeneity and lateral variability that characterizes a complex seismogenic zone, a most probably, diffuse plate boundary.</span></span></p><p><span><span>This research is supported by: Generalitat de Catalunya (AGAUR) grant 2017SGR1022 (GREG); EU (H2020) 871121 (EPOS-SP); EIT-RawMaterials 17024 (SIT4ME), </span></span><strong><span><span>CGL2013-47412-C2-1-P</span></span></strong><span><span>. </span></span></p>

scholarly journals First evidence of active transpressive surface faulting at the front of the eastern Southern Alps, northeastern Italy. Insight on the 1511 earthquake seismotectonics

2018 ◽  
Author(s):  
Emanuela Falcucci ◽  
Maria Eliana Poli ◽  
Fabrizio Galadini ◽  
Giancarlo Scardia ◽  
Giovanni Paiero ◽  
...  
Keyword(s):  
Strike Slip ◽  
Southern Alps ◽  
Strike Slip Fault ◽  
Fault System ◽  
The Past ◽  
Fold And Thrust Belt ◽  
Northeastern Italy ◽  
Dextral Strike Slip Fault ◽  
Seismic Lines ◽  
Dextral Strike Slip

Abstract. We investigated the eastern corner of northeastern Italy, where the NW-SE trending dextral strike-slip fault systems of western Slovenia intersects the south-verging fold and thrust belt of the eastern Southern Alps . The area suffered the largest earthquakes of the region, among which are the 1511 (Mw 6.3) event and the two major shocks of the 1976 seismic sequence, with Mw = 6.4 and 6.1 respectively. The Colle Villano thrust and the Borgo Faris-Cividale strike-slip fault have been first analyzed by interpreting industrial seismic lines and then by performing morpho-tectonic and paleoseismological analyses. These different datasets indicate that the two structures define an active, coherent transpressive fault system that activated twice in the past two millennia, with the last event occurring around the 15th–17th century. The chronological information, and the location of the investigated fault system suggest its activation during the 1511 earthquake.

scholarly journals Determining the main strand of the Eskişehir strike-slip fault zone using subsidiary structures and seismicity: a hypothesis tested by seismic reflection studies

2015 ◽  
Vol 24 ◽  
pp. 1-20 ◽  
Author(s):  
Gürol SEYİTOĞLU ◽  
G. Berkan ECEVİTOĞLU ◽  
Bülent KAYPAK ◽  
Yücel GÜNEY ◽  
Muammer TÜN ◽  
...  
Keyword(s):  
Fault Zone ◽  
Seismic Reflection ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Main Strand
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