scholarly journals Slip rate of trench‐parallel normal faulting along the Mejillones Fault (Atacama Fault System): Relationships with the northern Chile subduction and implications for seismic hazards

Terra Nova ◽  
2019 ◽  
Author(s):  
Jean‐François Ritz ◽  
Régis Braucher ◽  
Didier Bourlès ◽  
Bertrand Delouis ◽  
Carlos Marquardt ◽  
...  
Keyword(s):  
Slip Rate ◽  
Seismic Hazards ◽  
Fault System ◽  
Northern Chile ◽  
Normal Faulting ◽  
Atacama Fault System

Magnitude, timing, and rate of slip along the Atacama fault system, northern Chile: Implications for Early Cretaceous slip partitioning and plate convergence

2021 ◽  
pp. jgs2020-142
Author(s):  
N.M. Seymour ◽  
J.S. Singleton ◽  
R. Gomila ◽  
S.P. Mavor ◽  
G. Heuser ◽  
...  
Keyword(s):  
Convergence Rates ◽  
Slip Rate ◽  
Structural Data ◽  
Fault System ◽  
Content Type ◽  
Plate Convergence ◽  
Oblique Convergence ◽  
Slip History ◽  
Supplementary Material ◽  
Atacama Fault System

Displacement estimates along the Atacama fault system (AFS), a crustal-scale sinistral structure that accommodated oblique convergence in the Mesozoic Coastal Cordillera arc, vary widely due to a lack of piercing points. We mapped the distribution of plutons and mylonitic deformation along the northern ∼70 km of the El Salado segment and use U-Pb geochronology to establish the slip history of the AFS. Along the eastern branch, mylonitic fabrics associated with the synkinematic ∼134–132 Ma Cerro del Pingo Complex are separated by 34–38 km, and mylonites associated with a synkinematic ∼120–119 Ma tonalite are separated by 20.5–25 km. We interpret leucocratic intrusions to be separated across the western branch by ∼16–20 km, giving a total slip magnitude of ∼54 ± 6 km across the El Salado segment. Kinematic indicators consistently record sinistral shear and zircon (U-Th)/He data suggest dip-slip motion was insignificant. Displacement occurred between ∼133–110 Ma at a slip rate of ∼2.1–2.6 km/Myr. This slip rate is low compared to modern intra-arc strike-slip faults, suggesting (1) the majority of lateral slip was accommodated along the slab interface or distributed through the forearc or (2) plate convergence rates/obliquity were significantly lower than previously modeled.Supplementary material including full U-Pb, (U-Th)/He, petrographic, and structural data with locations is available at https://doi.org/10.6084/m9.figshare.c.5262177.

Fault zone development and strain partitioning in an extensional strike-slip duplex: A case study from the Mesozoic Atacama fault system, Northern Chile

2005 ◽  
Vol 400 (1-4) ◽  
pp. 105-125 ◽  
Author(s):  
J. Cembrano ◽  
G. González ◽  
G. Arancibia ◽  
I. Ahumada ◽  
V. Olivares ◽  
...  
Keyword(s):  
Fault Zone ◽  
Strike Slip ◽  
Fault System ◽  
Northern Chile ◽  
Strain Partitioning ◽  
Zone Development ◽  
Atacama Fault System

Hydrothermal alteration in an exhumed crustal fault zone: Testing geochemical mobility in the Caleta Coloso Fault, Atacama Fault System, Northern Chile

2014 ◽  
Vol 623 ◽  
pp. 147-168 ◽  
Author(s):  
Gloria Arancibia ◽  
Kazuna Fujita ◽  
Kenichi Hoshino ◽  
Thomas M. Mitchell ◽  
José Cembrano ◽  
...  
Keyword(s):  
Fault Zone ◽  
Hydrothermal Alteration ◽  
Fault System ◽  
Northern Chile ◽  
Atacama Fault System

scholarly journals The Relationship Between Magmatism and Deformation Along the Intra‐arc Strike‐Slip Atacama Fault System, Northern Chile

Tectonics ◽  
2020 ◽  
Vol 39 (3) ◽  
Author(s):  
N. M. Seymour ◽  
J. S. Singleton ◽  
S. P. Mavor ◽  
R. Gomila ◽  
D. F. Stockli ◽  
...  
Keyword(s):  
Strike Slip ◽  
Fault System ◽  
Northern Chile ◽  
Atacama Fault System ◽  
The Relationship

scholarly journals Young displacements on the Atacama Fault System, northern Chile from field observations and cosmogenic21Ne concentrations

Tectonics ◽  
2006 ◽  
Vol 25 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
Gabriel González L. ◽  
Tibor Dunai ◽  
Daniel Carrizo ◽  
Richard Allmendinger
Keyword(s):  
Fault System ◽  
Field Observations ◽  
Northern Chile ◽  
Atacama Fault System
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