UNIGE document Scientific Article
previous document  unige:154456  next document
add to browser collection
Title

Quantifying Multiple Erosion Events in the Distal Sector of the Northern Alpine Foreland Basin (North-Eastern Switzerland), by Combining Basin Thermal Modelling with Vitrinite Reflectance and Apatite Fission Track Data

Authors
Hamidi, Yanis
Published in Geosciences. 2021, vol. 11, no. 62
Abstract This work quantifies the amount of erosion associated with the Cretaceous and Miocene erosional unconformities recognised in the distal part of the Northern Alpine Foreland Basin (NAFB), north-eastern Switzerland. To achieve this goal, the basin thermal modelling approach is applied, calibrated by two different sets of data collected in previous studies: vitrinite reflectance (%Ro) and the temperature estimated from apatite fission tracks (AFT) data modelling. The novelty of this approach is the possibility to constrain the timing and magnitude of multiple erosion events by integrating thermal modelling with thermochronologic data. Combining these two methods allows the erosional events to be separated which would not be possible using only irreversible paleothermometers, such as vitrinite reflectance data. Two scenarios were tested, based on the data of two published thermochronology studies. For the Cretaceous unconformity, similar results are obtained for the two scenarios, both indicating that the deposition and the subsequent complete erosion of Lower Cretaceous deposits, in the order of 500–1300 m, depending on the area, are necessary, in order to attain the temperatures estimated by the thermal history modelling of AFT data. Thus, a depositional hiatus for this period is not likely. For the Miocene-Quaternary unconformity, the magnitude of erosion calculated for the two scenarios differs by 300–1400 m, depending on the AFT data considered. The two scenarios lead to a different evaluation of the subsidence and uplift rate of the study area, thus to a different interpretation of the tectono-stratigraphic evolution of this distal sector of the NAFB.
Keywords ErosionBasin thermal modellingApatite fission track dataNorthern Alpine Foreland Basin
Full text
Article (Published version) (1.3 MB) - public document Free access
Structures
Research groups Isotope Geochemistry, Geochronology and Thermochronology
Reservoir Geology and Sedimentary Basin Analyses
Citation
(ISO format)
OMODEO SALE, Silvia et al. Quantifying Multiple Erosion Events in the Distal Sector of the Northern Alpine Foreland Basin (North-Eastern Switzerland), by Combining Basin Thermal Modelling with Vitrinite Reflectance and Apatite Fission Track Data. In: Geosciences, 2021, vol. 11, n° 62. https://archive-ouverte.unige.ch/unige:154456

53 hits

16 downloads

Update

Deposited on : 2021-09-06

Export document
Format :
Citation style :