GEO-LEOedocs LogoGEO-LEOedocs Logo
  • GEO-LEO
    • Deutsch
    • English
  • GEO-LEO
  • English 
    • Deutsch
    • English
  • Login
View Item 
  •   Home
  • Alle Publikationen
  • Geologie
  • View Item
  •   Home
  • Alle Publikationen
  • Geologie
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Exhumation and uplift of the Sierras Pampeanas: preliminary implications from K–Ar fault gouge dating and low-T thermochronology in the Sierra de Comechingones (Argentina)

Löbens, Stefan
Bense, Frithjof
Wemmer, KlausORCIDiD
Dunkl, IstvánORCIDiD
Costa, Carlos
Layer, Paul
Siegesmund, Siegfried
Journal: International Journal of Earth Sciences, 2011
100, 2/3: 671 - 694
DOI: https://doi.org/10.1007/s00531-010-0608-0
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6670
Löbens, Stefan; Bense, Frithjof; Wemmer, Klaus; Dunkl, István; Costa, Carlos; Layer, Paul; Siegesmund, Siegfried, 2011: Exhumation and uplift of the Sierras Pampeanas: preliminary implications from K–Ar fault gouge dating and low-T thermochronology in the Sierra de Comechingones (Argentina). In: International Journal of Earth Sciences, Band 100, 2/3: 671 - 694, DOI: 10.1007/s00531-010-0608-0.
 
Thumbnail
View/Open
531_2010_Article_608.pdf (1.841Mb)
Metadata Export:
Endnote
BibTex
RIS
  • Abstract
The Sierras Pampeanas in central and north-western Argentina constitute a distinct morphotectonic feature between 27°S and 33°S. The last stage of uplift and deformation in this area are interpreted to be closely related to the Andean flat-slab subduction of the Nazca plate beneath the South American plate. K–Ar fault gouge dating and low-temperature thermochronology along two transects within the Sierra de Comechingones reveal a minimum age for the onset of brittle deformation about 340 Ma, very low exhumation rates since Late Paleozoic time, as well as a total exhumation of about 2.3 km since the Late Cretaceous. New Ar–Ar ages (7.54–1.91 Ma) of volcanic rocks from the San Luis volcanic belt support the eastward propagation of the flat-slab magmatic front, confirming the onset of flat-slab related deformation in this region at 11.2 Ma. Although low-temperature thermochronology does not clearly constrain the signal of the Andean uplift, it is understood that the current structural relief related to the Comechingones range has been achieved after the exhumation of both fault walls (circa 80–70 Ma).
Statistik:
View Statistics
Collection
  • Geologie [737]
GEO-LEO e-docs Lizenz

ImpressumPrivacy (Opt-Out)About usDeposit LicenseSupport: fid-geo-digi@sub.uni-goettingen.de
DFGSUBFID GEOFID Montan
 

 

Submit here
Submission hints
Search hints

All of Geo-Leo e-docsCommunities & CollectionsBy Issue DateContributorsSubjectsPeriodicalsTitlesThis CollectionBy Issue DateContributorsSubjectsPeriodicalsTitles

Statistics

View Usage Statistics

ImpressumPrivacy (Opt-Out)About usDeposit LicenseSupport: fid-geo-digi@sub.uni-goettingen.de
DFGSUBFID GEOFID Montan