Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 669-683 |
| Seitenumfang | 15 |
| Fachzeitschrift | Journal of the Geological Society |
| Jahrgang | 170 |
| Ausgabenummer | 4 |
| Publikationsstatus | Veröffentlicht - Juli 2013 |
Abstract
Exhumation of rocks in extensional tectonic settings results from a combination of normal faulting and erosion but the relative contribution of these processes has rarely been quantified. Here we present new low-temperature thermochronological data and the first 10Be-based catchment-wide erosion rates from the Boz Daǧ region in the central Menderes Massif, which has experienced NNE-SSW extension since the Miocene. The slip rate of the shallow-dipping Gediz detachment fault, which defines the northern flank of the Boz Daǧ block, is 4.3 (+3.0/-1.2) mm a-1, as constrained by zircon (U-Th)/He ages of c. 4-2 Ma in the footwall. Apatite and zircon (U-Th)/He and fission-track ages from the northern flank of the Boz Daǧ block yield exhumation rates of 0.6-2 km Ma-1 beneath the Gediz detachment, whereas those on the southern flank are only 0.2-0.6 km Ma-1. Erosion of catchments on the northern and southern flanks proceeds at rates of 80-180 and 330-460 mm ka-1, respectively. This marked contrast is a combined effect of the topographic asymmetry of the Boz Daǧ block and differences in rock erodibility. If these erosion rates persisted in the past, rock exhumation on the northern flank occurred predominantly by tectonic denudation, whereas rocks on the southern flank were mainly exhumed by erosion.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geologie
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in: Journal of the Geological Society, Jahrgang 170, Nr. 4, 07.2013, S. 669-683.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Quantifying rates of detachment faulting and erosion in the central Menderes Massif (western Turkey) by thermochronology and cosmogenic 10Be
AU - Buscher, J. T.
AU - Hampel, A.
AU - Hetzel, R.
AU - Dunkl, I.
AU - Glotzbach, C.
AU - Struffert, A.
AU - Akal, C.
AU - Rätz, M.
PY - 2013/7
Y1 - 2013/7
N2 - Exhumation of rocks in extensional tectonic settings results from a combination of normal faulting and erosion but the relative contribution of these processes has rarely been quantified. Here we present new low-temperature thermochronological data and the first 10Be-based catchment-wide erosion rates from the Boz Daǧ region in the central Menderes Massif, which has experienced NNE-SSW extension since the Miocene. The slip rate of the shallow-dipping Gediz detachment fault, which defines the northern flank of the Boz Daǧ block, is 4.3 (+3.0/-1.2) mm a-1, as constrained by zircon (U-Th)/He ages of c. 4-2 Ma in the footwall. Apatite and zircon (U-Th)/He and fission-track ages from the northern flank of the Boz Daǧ block yield exhumation rates of 0.6-2 km Ma-1 beneath the Gediz detachment, whereas those on the southern flank are only 0.2-0.6 km Ma-1. Erosion of catchments on the northern and southern flanks proceeds at rates of 80-180 and 330-460 mm ka-1, respectively. This marked contrast is a combined effect of the topographic asymmetry of the Boz Daǧ block and differences in rock erodibility. If these erosion rates persisted in the past, rock exhumation on the northern flank occurred predominantly by tectonic denudation, whereas rocks on the southern flank were mainly exhumed by erosion.
AB - Exhumation of rocks in extensional tectonic settings results from a combination of normal faulting and erosion but the relative contribution of these processes has rarely been quantified. Here we present new low-temperature thermochronological data and the first 10Be-based catchment-wide erosion rates from the Boz Daǧ region in the central Menderes Massif, which has experienced NNE-SSW extension since the Miocene. The slip rate of the shallow-dipping Gediz detachment fault, which defines the northern flank of the Boz Daǧ block, is 4.3 (+3.0/-1.2) mm a-1, as constrained by zircon (U-Th)/He ages of c. 4-2 Ma in the footwall. Apatite and zircon (U-Th)/He and fission-track ages from the northern flank of the Boz Daǧ block yield exhumation rates of 0.6-2 km Ma-1 beneath the Gediz detachment, whereas those on the southern flank are only 0.2-0.6 km Ma-1. Erosion of catchments on the northern and southern flanks proceeds at rates of 80-180 and 330-460 mm ka-1, respectively. This marked contrast is a combined effect of the topographic asymmetry of the Boz Daǧ block and differences in rock erodibility. If these erosion rates persisted in the past, rock exhumation on the northern flank occurred predominantly by tectonic denudation, whereas rocks on the southern flank were mainly exhumed by erosion.
UR - http://www.scopus.com/inward/record.url?scp=84880180086&partnerID=8YFLogxK
U2 - 10.1144/jgs2012-132
DO - 10.1144/jgs2012-132
M3 - Article
AN - SCOPUS:84880180086
VL - 170
SP - 669
EP - 683
JO - Journal of the Geological Society
JF - Journal of the Geological Society
SN - 0016-7649
IS - 4
ER -