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

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

RHEOLOGICAL BEHAVIOR OF INTRA-ARC STRIKE-SLIP FAULTS: INSIGHTS FROM THE ATACAMA FAULT SYSTEM IN NORTHERN CHILE

2020 ◽  
Author(s):  
John S. Singleton ◽  
◽  
Nikki M. Seymour ◽  
Rachel C. Ruthven ◽  
Skyler P. Mavor ◽  
...  
Keyword(s):  
Rheological Behavior ◽  
Strike Slip ◽  
Fault System ◽  
Northern Chile ◽  
Atacama Fault System

Development of a self-similar strike-slip duplex system in the Atacama Fault system, Chile

2011 ◽  
Vol 33 (11) ◽  
pp. 1611-1626 ◽  
Author(s):  
E. Jensen ◽  
J. Cembrano ◽  
D. Faulkner ◽  
E. Veloso ◽  
G. Arancibia
Keyword(s):  
Strike Slip ◽  
Fault System ◽  
Duplex System ◽  
Self Similar ◽  
Atacama Fault System

Jurassic to Early Cretaceous postaccretional sinistral transpression in north-central Chile (latitudes 31–32°S)

2011 ◽  
Vol 149 (2) ◽  
pp. 208-220 ◽  
Author(s):  
UWE RING ◽  
ARNE P. WILLNER ◽  
PAUL W. LAYER ◽  
PETER P. RICHTER
Keyword(s):  
Early Cretaceous ◽  
Shear Zones ◽  
White Mica ◽  
Strike Slip ◽  
Fault System ◽  
Low Grade ◽  
North Central ◽  
Central Chile ◽  
Metamorphic Basement ◽  
Atacama Fault System

AbstractWe describe the geometry and kinematics of a Jurassic to Early Cretaceous transpressive sinistral strike-slip system within a metamorphic basement inlier of the Mesozoic magmatic arc near Bahia Agua Dulce at latitudes 31–32°S in north-central Chile and discuss possible relations with the Atacama Fault System further north. Sinistral transpression overprints structures of an accretionary system that is represented by the metamorphic basement. Sub-vertical semi-ductile NNW-striking strike-slip shear zones are the most conspicuous structures. Chlorite and sericite grew, and white mica and quartz dynamically recrystallized, suggesting low-grade metamorphic conditions during semi-ductile deformation. Folds at the 10–100 metre scale developed before and during strike-slip shearing. The folds are deforming a former sub-horizontal transposition foliation that originated during prior accretion processes. The folds have axes sub-parallel to the strike-slip shear zones and sub-vertical axial surfaces indicating a component of shortening parallel to the shear-zone boundaries, suggesting an overall transpressive deformation regime. Transpressive strike-slip deformation also affects Middle Triassic (Anisian) basal breccias of the El Quereo Formation.40Ar–39Ar laser ablation ages of synkinematically recrystallized white mica in one of the shear zones provide an age of 174–165 Ma for the waning stages of semi-ductile strike-slip shearing. The semi-ductile shear zones are cut by mafic and rhyolite dykes. Two rhyolite dykes yield40Ar–39Ar ages of 160.5 ± 1.7 Ma and 131.9 ± 1.7 Ma, respectively. The latter dyke has been affected by brittle faulting. Fault-slip analysis shows that the kinematics of the faulting event is similar to the one of the semi-ductile shearing event, suggesting that sinistral transpression continued after ~130 Ma. Timing, kinematics and geographic position suggest that the shear zones at Bahia Agua Dulce represent a southern continuation of the prominent Atacama Fault System that affected the Jurassic/Early Cretaceous arc over its ~1400 km length.

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

Mapping of b-Value Anomalies Along the Strike-Slip Fault System on the Thailand–Myanmar Border: Implications for Upcoming Earthquakes

2017 ◽  
Vol 11 (02) ◽  
pp. 1671001 ◽  
Author(s):  
Santi Pailoplee
Keyword(s):  
B Value ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Fault System ◽  
Suitable Assumption ◽  
Significant Relation ◽  
Earthquake Sources ◽  
Hydropower Dams ◽  
The Relationship ◽  
Frequency Magnitude

In order to determine the prospective areas of the forthcoming earthquake sources, the [Formula: see text]-values of the frequency-magnitude earthquake distributions were analyzed spatially and mapped along the strike-slip fault system at the Thailand–Myanmar border. In order to constrain the relationship between the variation of [Formula: see text] and the following hazardous earthquake, the completeness of earthquake catalogue was manipulated into two datasets for (i) 1980–2000 and (ii) 1980–2005 and the [Formula: see text]-values mapped. Utilizing the suitable assumption of 30 fixed earthquake events, the following [Formula: see text] earthquakes illustrate a significant relation between their epicenter and the areas showing relatively low [Formula: see text]-values. By utilizing the most recent earthquake data (1980–2015), five areas exhibiting low [Formula: see text]-values (implying prospective earthquake sources) can be identified along the strike-slip fault system. Compared with earthquake activities evaluated previously along the strike-slip fault system, the data reveal that these five areas may potentially generate earthquakes up to 7.0[Formula: see text][Formula: see text] within the coming 50 years; the recurrence of the [Formula: see text]-5.0 earthquake is about 10 years and the probabilities of the [Formula: see text]-5.0 earthquake are about 40–95%, respectively. Since these prospective hazardous seismic zones are located close to cities, population centers and hydropower dams, an effective mitigation plan should be developed.

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