Central Andean rotation pattern: Evidence from paleomagnetic rotations of an anomalous domain in the forearc of northern Chile

Taylor, Graeme K.; Dashwood, Ben; Grocott, John

doi:10.1130/g21876.1

Cited by 26 publications

(21 citation statements)

References 24 publications

(38 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given the quantity, quality and geographical spread of the individual studies this is a strikingly uniform result indicating a large and relatively homogenous rotation has affected all of this part of the present fore arc. It is difficult to envisage a situation in which such a relatively uniform rotation having affected the entire region, outboard of the DFS, was not the result of plate-scale forces operating during a single, albeit non instantaneous, tectonic episode [Taylor et al, 2005]. The data from the present study clearly indicate that this has to postdate the emplacement of the Cabeza de Vaca pluton and the Paleocene remagnetization event at $65 -55 Ma.…”

Section: Crustal Rotationmentioning

confidence: 74%

“…East of the DFS, data are limited and ambiguous as to whether the rotations decrease rapidly or whether the results from this part of the area are also highly variable. The overall pattern suggests two possible options [Taylor et al, 2005] either (1) the DFS is the eastern limit of the rotating crustal zone and the fault system and its variable rotations are accommodating these large outboard rotations; or (2) disruption along the DFS caused variable clockwise and counterclockwise rotations to be superimposed on a preexisting, regionally coherent set of clockwise ($39°) rotations recorded in the Coastal Cordillera/Central Valley and which would have originally continued and diminished to the east of the DFS. This latter option has previously been suggested such that the eastern margin of the deforming region would be delimited to the east of the DFS by a system of thrust faults with rotation being accomplished in a domino type manner during transpression [Abels and Bischoff, 1999].…”

Section: Crustal Rotationmentioning

confidence: 99%

See 1 more Smart Citation

Implications for crustal rotation and tectonic evolution in the central Andes fore arc: New paleomagnetic results from the Copiapó region of northern Chile, 26°–28°S

et al. 2007

Self Cite

View full text Add to dashboard Cite

New paleomagnetic data from the Coastal Cordillera‐Precordillera boundary area of northern Chile, east of Copiapó, between 26°00′S and 28°00′S are reported. Early Cretaceous to earliest Paleocene volcanics and sediments are nearly completely remagnetized, the remagnetization typically being carried by both magnetite and hematite. In a small minority of sites a pretilting remanence is retained, however, both pretilting and posttilting remanences yield similar directions. These remanences plus primary remanences from Paleocene intrusions indicate a significant >35° rotation of the whole area, in agreement with previous results from the region. The data suggest that the whole of this part of the Andean fore arc has undergone a substantial, regionally coherent, clockwise rotation. This rotation, it is argued, is in response to rapid and highly oblique Nazca–South American plate convergence in the period ∼60–45 Ma prior to later Incaic deformation in the east of the study area. In the east, heterogeneous rotations associated with the Domeyko Fault System are interpreted as being superimposed on this regional rotation resulting in a highly variable and localized pattern of rotations in the vicinity of the main structures comprising the fault system itself.

show abstract

Section: Crustal Rotationmentioning

confidence: 74%

Section: Crustal Rotationmentioning

confidence: 99%

Implications for crustal rotation and tectonic evolution in the central Andes fore arc: New paleomagnetic results from the Copiapó region of northern Chile, 26°–28°S

et al. 2007

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, Arriagada et al (2003) found clockwise tectonic rotations of up to 65° within the forearc domain (Antofagasta region), which would have occurred mainly during the Incaic orogenic event of Eocene-Early Oligocene age. Taylor et al (2005) also noted that many of the rotations detected in the forearc of northern Chile are particularly large and appear to record a rotational event older than those observed elsewhere in the Central Andes. They argued that such data define a domain marked by large clockwise crustal rotations related to late Paleocene-Early Eocene highly oblique convergence.…”

Section: Introductionmentioning

confidence: 99%

“…Each reference paleopole was used in accordance with the age of the magnetization of each Andean paleomagnetic data. It is important to mention that Taylor et al (2005) highlighted that no major difference in the pattern of rotations for the past 100 My arose when using global data sets (Besse and Courtillot, 2002) or dominantly South American data (Lamb and Randall, 2001) as reference.…”

Section: Paleomagnetic Datamentioning

confidence: 99%

“…Local models have also been proposed, but they are focused in the forearc (e.g., Forsythe and Chisholm, 1994;Taylor et al, 1998;Abels and Bischoff, 1999;Arriagada et al, 2003;Taylor et al, 2005). Recently, the quantity, quality, and geographic distribution of paleomagnetic data have expanded greatly (Richards et al, 2004;Prezzi et al, 2004;Arriagada et al, 2006;Roperch et al, 2006;Taylor et al, 2007;Barke and Lamb, 2007;Arriagada et al, 2008b;Maffione et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Southern Central Andes vertical axis tectonic rotations: relations with the deformation pattern

Prezzi

Llanos

2012

andgeo

View full text Add to dashboard Cite

ABSTRACT. Along the Central Andes a pattern of vertical axis tectonic rotations has been paleomagnetically identified. Such rotations are counterclockwise north of Arica Deflection (~19°S) and clockwise to the south. Different hypothesis and models have been proposed to explain the Central Andean Rotation Pattern (CARP). However, the CARP is a subject of ongoing debate. Recently, the quantity, quality, and geographic distribution of paleomagnetic data have expanded greatly. Such expansion has been accompanied by an increase in the knowledge of the deformation periods in the Andes, allowing a more detailed analysis of the temporal and spatial distribution of the detected rotations. We compiled and analyzed the available Cenozoic paleomagnetic data for the region extending between 19° and 27.5°S. The results suggest the possible existence of different rotational domains with distinct characteristics. We propose that in the Southern Central Andes, a close correlation would exist between the style and the temporal and spatial pattern of deformation and the amount of recorded vertical axis rotations. However, in order to further investigate such relationship, new paleomagnetic studies are necessary, particularly in the Eastern Cordillera domain, in Paleogene rocks cropping out in the Altiplano-Puna and in Neogene rocks of the forearc.

show abstract

Paleomagnetism and magnetic fabric of the Eastern Cordillera of Colombia: Evidence for oblique convergence and nonrotational reactivation of a Mesozoic intracontinental rift

et al. 2014

View full text Add to dashboard Cite

We report the paleomagnetic and magnetic fabric results of 58 sites from Cretaceous-Miocene marine and continental strata from the Eastern Cordillera (EC) and the Cucuta zone, at the junction between the Santander Massif and the Merida Andes of Colombia. The EC is an intracontinental doubly vergent range inverting a Triassic to Early Cretaceous rift zone. Twenty-three sites reveal nonsystematic tectonic rotations, including unrotated areas of the EC range with respect to stable South America. Our data show that the EC inverted a NNE oriented rift zone and that the orientation of the Mesozoic rift and the mountain chain roughly correspond. Interestingly, magnetic lineations from anisotropy of magnetic susceptibility analysis do not trend parallel to the chain but rather are oblique to the main orogenic trend. By also considering GPS evidence of a~1 cm/yr ENE displacement of central western Colombia accommodated by the EC, we suggest that the Miocene-Recent deformation event of this belt arises from ENE oblique convergence reactivating a NNE oriented rift zone. Oblique shortening was likely partitioned into pure dip-slip shear characterizing thick-skinned frontal thrust sheets (well known along both chain fronts) and by range-parallel right-lateral strike-slip faults, which have not been identified yet, but likely exist in the axial part of the EC. Finally, the 35°± 9°clockwise rotation observed in four post-Miocene magnetically overprinted sites from the Cucuta zone reflects late Cenozoic and ongoing right-lateral strike-slip displacement occurring along faults parallel to the Boconó fault system, possibly connected with the right-lateral faults inferred to exist along the axial part of the EC.

show abstract

Central Andean rotation pattern: Evidence from paleomagnetic rotations of an anomalous domain in the forearc of northern Chile

Cited by 26 publications

References 24 publications

Implications for crustal rotation and tectonic evolution in the central Andes fore arc: New paleomagnetic results from the Copiapó region of northern Chile, 26°–28°S

Implications for crustal rotation and tectonic evolution in the central Andes fore arc: New paleomagnetic results from the Copiapó region of northern Chile, 26°–28°S

The Southern Central Andes vertical axis tectonic rotations: relations with the deformation pattern

Paleomagnetism and magnetic fabric of the Eastern Cordillera of Colombia: Evidence for oblique convergence and nonrotational reactivation of a Mesozoic intracontinental rift

Contact Info

Product

Resources

About