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TitleCalibration of a Neogene magnetostratigraphy by 40Ar-39Ar geochronology: the foreland basin strata of northern Mendoza Province, Argentina
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorIrigoyen, M V; Villeneuve, M E; Quigg, F
SourceRadiogenic age and isotopic studies: Report 12; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1999-F, 1999 p. 27-41, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Radiogenic age and isotopic studies: Report 12
File formatpdf
AreaMendoza Province; Mendoza River; Andes Mountains; Tupungato; Argentina
Lat/Long WENS-69.2500 -69.0000 -33.0000 -33.3333
Subjectsgeochronology; stratigraphy; Neogene; magnetostratigraphy; argon argon dates; radiometric dates; tuffs; igneous rocks; analytical methods; sedimentation; Mogotes Formation; La Pilona Formation; Quaternary; Tertiary
Illustrationssketch maps; Concordia diagrams; analyses
Released1999 04 01
AbstractNeogene strata exposed in the southernmost part of the Precordillera fold-and-thrust belt, Mendoza Province, Argentina, record the eastward migration of the Andean deformation front since the middle Miocene. In order to link the sequence of deformational events occurring in the western thrust belts with the sedimentary record, the Neogene succession has been dated using magnetic polarity stratigraphy calibrated with 40Ar-39Ar isotopic dates. This paper reports on age determinations obtained by 40Ar-39Ar isotopic dating of six tuff beds interbedded in the Neogene sequence, which assist in tying the local magnetostratigraphy to the geomagnetic polarity time scale. In addition, the age results of two samples collected from air-fall tuff horizons interbedded in Quaternary deposits, which have been dated to provide temporal constraints on the age of the youngest Mogotes Formation and the timing of the formation of major structures in the region, are presented.

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