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Miocene basement exhumation in the Central Alps recorded by detrital garnet geochemistry in foreland basin deposits

Stutenbecker, Laura ; Tollan, Peter M. E. ; Madella, Andrea ; Lanari, Pierre (2019)
Miocene basement exhumation in the Central Alps recorded by detrital garnet geochemistry in foreland basin deposits.
In: Solid Earth, 2019, (5)
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Miocene basement exhumation in the Central Alps recorded by detrital garnet geochemistry in foreland basin deposits
Language: English
Date: 2019
Place of Publication: Darmstadt
Year of primary publication: 2019
Publisher: Copernicus
Journal or Publication Title: Solid Earth
Issue Number: 5
Series Volume: 10
Corresponding Links:
Origin: Secondary publication via sponsored Golden Open Access
Abstract:

The Neogene evolution of the European Alps was characterized by the exhumation of crystalline basement, the so-called external crystalline massifs. Their exhumation presumably controlled the evolution of relief, distribution of drainage networks, and generation of sediment in the Central Alps. However, due to the absence of suitable proxies, the timing of their surficial exposure and thus the initiation of sediment supply from these areas are poorly constrained. The northern Alpine foreland basin preserves the Oligocene to Miocene sedimentary record of tectonic and climatic adjustments in the hinterland. This contribution analyses the provenance of 25 to 14 Myr old alluvial fan deposits by means of detrital garnet chemistry. Unusually grossularand spessartine-rich garnet is found (1) to be a unique proxy for identifying detritus from the external crystalline massifs and (2) to occur abundantly in ca. 14 Myr old deposits of the foreland basin. In contrast to previous assumptions, we therefore propose that the external massifs were already exposed to the surface ca. 14 Myr ago.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-92039
Classification DDC: 500 Science and mathematics > 550 Earth sciences and geology
Divisions: 11 Department of Materials and Earth Sciences > Earth Science
Date Deposited: 25 Oct 2019 14:00
Last Modified: 13 Dec 2022 09:05
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/9203
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