scholarly journals Late Pleistocene‐Holocene Slip Rate Along the Hasi Shan Restraining Bend of the Haiyuan Fault: Implication for Faulting Dynamics of a Complex Fault System

Tectonics ◽  
2019 ◽  
Vol 38 (12) ◽  
pp. 4127-4154
Author(s):  
R. Matrau ◽  
Y. Klinger ◽  
J. Van der Woerd ◽  
J. Liu‐Zeng ◽  
Z. Li ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Slip Rate ◽  
Fault System ◽  
Complex Fault ◽  
Restraining Bend ◽  
Complex Fault System

scholarly journals Assembly of a large earthquake from a complex fault system: Surface rupture kinematics of the 4 April 2010 El Mayor–Cucapah (Mexico) Mw 7.2 earthquake

Geosphere ◽  
2014 ◽  
Vol 10 (4) ◽  
pp. 797-827 ◽  
Author(s):  
John M. Fletcher ◽  
Orlando J. Teran ◽  
Thomas K. Rockwell ◽  
Michael E. Oskin ◽  
Kenneth W. Hudnut ◽  
...  
Keyword(s):  
Large Earthquake ◽  
Fault System ◽  
Surface Rupture ◽  
Complex Fault ◽  
Rupture Kinematics ◽  
Complex Fault System

scholarly journals Evidence for quaternary seismic activity of the La Alberca-Teremendo fault, Morelia region, Trans-Mexican Volcanic Belt

2019 ◽  
Vol 36 (2) ◽  
pp. 242-258
Author(s):  
Diana Cinthia Soria-Caballero ◽  
Victor Hugo Garduño-Monroy ◽  
María Alcalá ◽  
María Magdalena Velázquez-Bucio ◽  
Laura Grassi
Keyword(s):  
Slip Rate ◽  
Volcanic Belt ◽  
Vertical Displacement ◽  
Fault System ◽  
Morphological Evidence ◽  
Rupture Length ◽  
Mexican Volcanic Belt ◽  
Complex Fault ◽  
Tectonic Earthquakes ◽  
A Minor

The La Alberca-Teremendo fault is a 26 km-long, complex fault composed of an en échelon array of short crustal fault segments, belonging to the Morelia-Acambay fault system. This fault system shows parallel scarps with morphological evidence of recent activity such as drainage alteration, maximum throws of 50 m and minimum throws of 1.4 m that displace the recent soils. The fault acted as a conduit for the formation of the La Alberca de Guadalupe maar (23000 to 21000 years ago) and displaced afterwards its phreatomagmatic sequences. The paleoseismic analysis indicates that the La Alberca-Teremendo fault moved three times in the past 23000 years (age of the maar); this activity caused an average vertical displacement of 87 cm, and might have generated earthquakes with magnitudes Mw between 6.6 and 7, as well as volcano-tectonic earthquakes with magnitudes Mw between 4 and 5.5. The displacements were identified on the fault through the superposition of soils differentiated by a disconformity and an anomalous increase in the percentage of clay and organic matter. The La Alberca-Teremendo fault has dominant dip slip with a minor left-lateral component, a slip rate of 0.114 mm/year, and an average recurrence interval of 7726 ± 68 years. According to scaling relations that use the surface rupture length, if we assume that the La Alberca-Teremendo fault moves tectonically, it could generate earthquakes with maximum magnitudes of Mw between 6.7 and 7.3, however because of the active volcanic processes in the area, we could expect moderate volcano-tectonic earthquakes (Mw 4–5.5) rather than catastrophic ones.

Quaternary slip rates on the White Mountains fault zone, eastern California: Implications for comparing geologic to geodetic slip rates across the Walker Lane

2020 ◽  
Vol 133 (1-2) ◽  
pp. 307-324
Author(s):  
Zachery M. Lifton ◽  
Jeffrey Lee ◽  
Kurt L. Frankel ◽  
Andrew V. Newman ◽  
Jeffrey M. Schroeder
Keyword(s):  
Fault Zone ◽  
Late Pleistocene ◽  
Slip Rate ◽  
North American Plate ◽  
Fault System ◽  
White Mountains ◽  
Slip Rates ◽  
Walker Lane ◽  
Lateral Displacements ◽  
Exposure Ages

Abstract The White Mountains fault zone in eastern California is a major fault system that accommodates right-lateral shear across the southern Walker Lane. We combined field geomorphic mapping and interpretation of high-resolution airborne light detection and ranging (LiDAR) digital elevation models with 10Be cosmogenic nuclide exposure ages to calculate new late Pleistocene and Holocene right-lateral slip rates on the White Mountains fault zone. Alluvial fans were found to have ages of 46.6 + 11.0/–10.0 ka and 7.3 + 4.2/–4.5 ka, with right-lateral displacements of 65 ± 13 m and 14 ± 5 m, respectively, yielding a minimum average slip rate of 1.4 ± 0.3 mm/yr. These new slip rates help to resolve the kinematics of fault slip across this part of the complex Pacific–North American plate boundary. Our results suggest that late Pleistocene slip rates on the White Mountains fault zone were significantly faster than previously reported. These results also help to reconcile a portion of the observed discrepancy between modern geodetic strain rates and known late Pleistocene slip rates in the southern Walker Lane. The total middle to late Pleistocene slip rate from the southern Walker Lane near 37.5°N was 7.9 + 1.3/–0.6 mm/yr, ∼75% of the observed modern geodetic rate.

Revealing new hydrocarbon potential through Q-compensated prestack depth imaging at Wenchang Field, South China Sea

2019 ◽  
Vol 38 (8) ◽  
pp. 604-609
Author(s):  
Lin Li ◽  
Lie Li ◽  
Tao Xu ◽  
Min Ouyang ◽  
Yonghao Gai ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Hydrocarbon Exploration ◽  
Source Rocks ◽  
Fault System ◽  
Depth Image ◽  
Hydrocarbon Potential ◽  
China Sea ◽  
Complex Fault ◽  
Complex Fault System

Wenchang Field in the South China Sea contains a well-developed fault system, resulting in complex subsurface geology. Imaging the complex fault system plays an important role in hydrocarbon exploration in this area since the fault system forms a link between the source rocks and reservoirs. However, it is difficult to obtain a high-quality depth image of the fault system due to the effects of complex velocity and seismic absorption. Inaccurate depth velocities lead to fault shadows and structure distortions at the target zone. Absorption effects further deteriorate seismic imaging as they cause amplitude attenuation, phase distortion, and resolution reduction. We demonstrate how a combination of high-resolution depth velocity modeling and Q imaging work together to resolve these challenges. This workflow provides a step change in image quality of the complex fault system and targeted source rocks at Wenchang Field, significantly enhancing structure interpretation and reservoir delineation. A couple of commercial discoveries have been made, and several other potential hydrocarbon reservoirs have been identified based on the reprocessed data, which reveal new hydrocarbon potential in this region.

scholarly journals Late Pleistocene slip rate of the Höh Serh-Tsagaan Salaa fault system, Mongolian Altai and intracontinental deformation in central Asia

2010 ◽  
Vol 183 (3) ◽  
pp. 1134-1150 ◽  
Author(s):  
Kurt L. Frankel ◽  
Karl W. Wegmann ◽  
Amgalan Bayasgalan ◽  
Robert J. Carson ◽  
Nicholas E. Bader ◽  
...  
Keyword(s):  
Central Asia ◽  
Late Pleistocene ◽  
Slip Rate ◽  
Fault System ◽  
Mongolian Altai ◽  
Intracontinental Deformation

scholarly journals Source process for complex fault system of the 2007 Chuetsu-oki, Niigata, Japan, earthquake

2009 ◽  
Vol 61 (2) ◽  
pp. 273-278 ◽  
Author(s):  
Takeshi Nakamura ◽  
Yasushi Ishihara ◽  
Yoshiko Yamanaka ◽  
Yoshiyuki Kaneda
Keyword(s):  
Source Process ◽  
Fault System ◽  
Complex Fault ◽  
Complex Fault System

The 2016 Gyeongju earthquake sequence revisited: aftershock interactions within a complex fault system

2019 ◽  
Vol 217 (1) ◽  
pp. 58-74 ◽  
Author(s):  
Jeong-Ung Woo ◽  
Junkee Rhie ◽  
Seongryong Kim ◽  
Tae-Seob Kang ◽  
Kwang-Hee Kim ◽  
...  
Keyword(s):  
Earthquake Sequence ◽  
Fault System ◽  
Complex Fault ◽  
Gyeongju Earthquake ◽  
Complex Fault System
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