Evidence of Jurassic extension in NW Argentina: Characterization of 
fault-related strata at the Salta Group base using sandstone provenance and 
zircon U–Pb geochronology

van Kooten, Willemijn S.M.T.; Del Papa, Cecilia E.; Starck, Daniel; Sobel, Edward R.; Cavalleri, Pablo; Agüera, Maximiliano; van Schijndel, Valby; Glodny, J.

doi:10.1016/j.jsames.2022.104048

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Evidence of Jurassic extension in NW Argentina: Characterization of fault-related strata at the Salta Group base using sandstone provenance and zircon U–Pb geochronology

Authors

van Kooten, Willemijn S.M.T.
External Organizations;

Del Papa, Cecilia E.
External Organizations;

Starck, Daniel
External Organizations;

Sobel, Edward R.
External Organizations;

Cavalleri, Pablo
External Organizations;

Agüera, Maximiliano
External Organizations;

van Schijndel, Valby
External Organizations;

/persons/resource/glodnyj

Glodny, J.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

External Ressource

No external resources are shared

Fulltext (public)

There are no public fulltexts stored in GFZpublic

Supplementary Material (public)

There is no public supplementary material available

Citation

van Kooten, W. S., Del Papa, C. E., Starck, D., Sobel, E. R., Cavalleri, P., Agüera, M., van Schijndel, V., Glodny, J. (2022): Evidence of Jurassic extension in NW Argentina: Characterization of fault-related strata at the Salta Group base using sandstone provenance and zircon U–Pb geochronology. - Journal of South American Earth Sciences, 120, 104048.
https://doi.org/10.1016/j.jsames.2022.104048

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5013748

Abstract

The present-day structure of the Eastern Cordillera in NW Argentina is governed by structural and lithological heterogeneities inherited from preceding deformation phases, which influence the localization of newly-formed faults and the inversion of pre-existing structures. The Salta Rift Basin formed during a Late Jurassic-Cretaceous extensional phase and created a dominant structural and stratigraphic imprint in NW Argentina that is particularly evident within the Eastern Cordillera, where uplift and exhumation have exposed the Salta Group syn-rift succession. Although in general, the Salta Group rests upon Paleozoic rocks, locally the Tacurú Group forms an intermediate succession, consisting of interfingering eolian sandstones and proximal fault-related conglomerates with a Jurassic maximum depositional age. This succession might be the key to unraveling the Mesozoic history of NW Argentina, prior to the deposition of the Salta Group. The conglomerates represent the earliest deposits related to extension in the western Lomas de Olmedo sub-basin, which is also documented in predominantly Jurassic zircon (U–Th-Sm)/He cooling ages of the rift shoulders. The detrital zircon U–Pb age signature and sandstone provenance of the Tacurú Group conglomerates differs strongly from the Salta Group syn-rift strata, which show a more regional signal. These variations and the angularity of the unconformity may be connected to a rotation of the extension direction in the western Lomas de Olmedo sub-basin.