Defining denudation rate of carbonate rocks using cosmogenic 36Cl in the Taurus Mountain, S-SW Turkey

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dc.contributor.authorHashemi, Ken_AU
dc.contributor.authorSarikaya, MAen_AU
dc.contributor.authorWilcken, KMen_AU
dc.date.accessioned2023-03-30T21:23:50Zen_AU
dc.date.available2023-03-30T21:23:50Zen_AU
dc.date.issued2021-04-19en_AU
dc.date.statistics2023-03-27en_AU
dc.description.abstractDenudation of carbonate terrains occurs by the contribution of both chemical and mechanical weathering. In-situ cosmogenic 36Cl is a robust proxy to quantify the long-term total denudation rate of carbonate rocks. In this study, we defined the steady-state denudation rate of carbonate bedrock using 36Cl for 105-106 years under the temperate Mediterranean to semi-arid climate in and around the Taurus Mountain Range, S-SW Turkey. We collected 13 samples from different lithological units; Jurassic-Cretaceous neritic limestone in the temperate western Taurus, Miocene neritic limestone in the semi-arid Central Taurus, and Mesozoic marbles in the continental part of Central Taurus. The calculated denudation rates range from 28.9 ± 1.4 mm/ka in the Mediterranean coastal range to 1.6 ± 0.1 mm/ka towards northern continental/rain shadow. We compared the denudation rates with a range of parameters such as topographic, climatic, lithologic and mechanical properties of rocks. For almost all samples denudation rate increases with elevation, with two exceptions with the highest rates despite their lower elevations. This high denudation rates could be due to their proximity to the sea. Our results showed that denudation rates decrease with increasing distance from the coast. All denudation rates showed a positive correlation with mean annual precipitation (MAP ~ 400-760 mm) as suggested by other studies worldwide. Annual temperatures (MAT ~ 6-16 °C), however, has a negative correlation with the denudation rates, i.e. the highest denudations occur in the low temperatures (MAT ~ 6-8 °C). The mechanical strength of the rocks was measured with a Schmidt hammer in the field. The high rebound values of Schmidt hammer, indicating the high mechanical strength, correlate with low denudation rates. Nevertheless, the mechanical strength of the carbonate bedrock is not as effective as precipitation or available moisture on denudation rates. This could be shown by two samples close to the Mediterranean which both have high mechanical strength nonetheless show the highest denudation rates. In conclusion, our study suggests that carbonate bedrock denudation in Taurus Mountain correlates with high elevation (~ 1900-2250 m), high precipitation (~ 700-800 mm), low temperatures (~ 6-8 °C) and short distances from the Mediterranean coast.en_AU
dc.identifier.citationHashemi, K., Sarıkaya, M. A., & Wilcken, K. M. (2021). Defining denudation rate of carbonate rocks using cosmogenic 36Cl in the Taurus Mountain, S-SW Turkey. Paper presented to the EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-2915. Retrieved from: https://doi.org/10.5194/egusphere-egu21-2915en_AU
dc.identifier.conferenceenddate30 April 2021en_AU
dc.identifier.conferencenameEGU General Assembly 2021en_AU
dc.identifier.conferenceplaceOnlineen_AU
dc.identifier.conferencestartdate19 April 2021en_AU
dc.identifier.otherEGU21-2915en_AU
dc.identifier.urihttps://doi.org/10.5194/egusphere-egu21-2915en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14755en_AU
dc.language.isoenen_AU
dc.publisherCopernicus GmbHen_AU
dc.subjectCarbonate rocksen_AU
dc.subjectMountainsen_AU
dc.subjectLimestoneen_AU
dc.subjectRangeen_AU
dc.subjectCorrelationsen_AU
dc.subjectMechanical propertiesen_AU
dc.titleDefining denudation rate of carbonate rocks using cosmogenic 36Cl in the Taurus Mountain, S-SW Turkeyen_AU
dc.typeConference Paperen_AU
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