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Title

Jurassic to Palaeogene tectono-magmatic evolution of northern Chile and adjacent Bolivia from detrital zircon U-Pb geochronology and heavy mineral provenance

Authors
Decou, Audrey
von Eynatten, Hilmar
Wörner, Gerhard
Frei, Dirk
Published in Terra Nova. 2011, vol. 23, no. 6, p. 399-406
Abstract Heavy mineral provenance data presented in this article reinforce evidence for significant late Palaeogene deformation and relief formation along the western margin of the Central Andean Plateau. Late Eocene–Oligocene onset of molasse-type sedimentation records initial range uplift. Strikingly different basement sources of sediments deposited to the east and west of the Late Palaeogene range indicate that initial relief development was governed by a bivergent thrust system. Significantly higher sediment accumulation rates to the east of the range compared to the west suggest that the generated relief acted already as an effective orographic barrier at that time. Higher precipitation and denudation along the eastern slope facilitated deeper erosion of the trust belt
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Structures
Research group Isotope Geochemistry, Geochronology and Thermochronology
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WOTZLAW, Joern Frederik et al. Jurassic to Palaeogene tectono-magmatic evolution of northern Chile and adjacent Bolivia from detrital zircon U-Pb geochronology and heavy mineral provenance. In: Terra Nova, 2011, vol. 23, n° 6, p. 399-406. https://archive-ouverte.unige.ch/unige:29585

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Deposited on : 2013-09-10

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