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

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

The geometry, kinematics, and timing of deformation along the southern segment of the Paposo fault zone, Atacama fault system, northern Chile

2020 ◽  
Vol 97 ◽  
pp. 102355 ◽  
Author(s):  
Rachel Ruthven ◽  
John Singleton ◽  
Nikki Seymour ◽  
Rodrigo Gomila ◽  
Gloria Arancibia ◽  
...  
Keyword(s):  
Fault Zone ◽  
Fault System ◽  
Northern Chile ◽  
Atacama Fault System

scholarly journals Structural evolution of a crustal-scale seismogenic fault in a magmatic arc: The Bolfin Fault Zone (Atacama Fault System)

2021 ◽  
Author(s):  
Simone Masoch ◽  
Rodrigo Gomila ◽  
Michele Fondriest ◽  
Erik Jensen ◽  
Tom Mitchell ◽  
...  
Keyword(s):  
Fault Zone ◽  
Large Scale ◽  
Damage Zone ◽  
Structural Evolution ◽  
Crystalline Basement ◽  
Fault System ◽  
Fault Mechanics ◽  
Seismogenic Fault ◽  
Magmatic Arc ◽  
Atacama Fault System

<p>The nucleation and evolution of major crustal-scale seismogenic faults in the crystalline basement as well as the process of strain localization represent a long-standing, but poorly understood, issue in structural geology and fault mechanics. Here, we addressed the spatio-temporal evolution of the Bolfin Fault Zone (BFZ), a >40-km-long exhumed seismogenic splay fault of the 1000-km-long strike-slip Atacama Fault System. The BFZ has a sinuous fault trace across the Mesozoic magmatic arc of the Coastal Cordillera (Northern Chile). Seismic faulting occurred at 5-7 km depth and ≤ 270 °C in a fluid-rich environment as recorded by extensive propylitic alteration and epidote-chlorite veining. The ancient (125-118 Ma) seismicity is attested by the widespread occurrence of pseudotachylytes both in the fault core and in the damage zone. Field geological surveys indicate nucleation of the BFZ on precursory geometrical anisotropies represented by magmatic foliation of plutons (northern and central segments) and andesitic dyke swarms (southern segment) within the heterogeneous crystalline basement. Faulting exploited the segments of precursory anisotropies that were favorably oriented with respect to the long-term stress field associated with the oblique ancient subduction. The large-scale sinuous geometry of the BFZ may result from linkage of these anisotropy-pinned segments during fault growth. This evolution may provide a model to explain the complex fault pattern of the crustal-scale Atacama Fault System.</p>

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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