Recent, slow normal and strike-slip faulting in the Pasto Ventura region of the southern Puna Plateau, NW Argentina

Zhou, Renjie, Schoenbohm, Lindsay M. and Cosca, Michael (2013) Recent, slow normal and strike-slip faulting in the Pasto Ventura region of the southern Puna Plateau, NW Argentina. Tectonics, 32 1: 19-33. doi:10.1029/2012TC003189

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Author Zhou, Renjie
Schoenbohm, Lindsay M.
Cosca, Michael
Title Recent, slow normal and strike-slip faulting in the Pasto Ventura region of the southern Puna Plateau, NW Argentina
Journal name Tectonics   Check publisher's open access policy
ISSN 1944-9194
0278-7407
Publication date 2013-01-01
Sub-type Article (original research)
DOI 10.1029/2012TC003189
Open Access Status File (Publisher version)
Volume 32
Issue 1
Start page 19
End page 33
Total pages 15
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell Publishing
Language eng
Abstract Recent normal and strike-slip faulting on the Puna Plateau of NW Argentina has been linked to lithospheric foundering, gravitational spreading, plate boundary forces and a decrease in crustal shortening from north to south. However, the timing, kinematics and rate of extension remain poorly constrained. We focus on the Pasto Ventura region (NW Argentina) located on the southern Puna Plateau and recent deformation (<1 Ma). Field mapping and kinematic analysis across offset volcanic cinder cones show that the overall extension direction is subhorizontal, is oriented NE-SW to NNE-SSW, and occurs at a slow, time-integrated rate of 0.02 to 0.08 mm/yr since at least 0.8–0.5 Ma. A regional compilation from this study and existing data shows that recent extension across the Puna Plateau is subhorizontal but varies in azimuthal orientation dramatically. Data from the Pasto Ventura region are consistent with a number of models to explain normal and strike-slip faulting on the Puna Plateau, all of which likely influence the region. Some role for lower lithospheric foundering through dripping appears to be seen based on the regional extension directions and ages of mafic volcanism in the southern Puna Plateau.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Issue: January/February 2013

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Earth and Environmental Sciences
 
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Created: Wed, 05 Apr 2017, 16:21:23 EST by Renjie Zhou on behalf of Learning and Research Services (UQ Library)