Luminescence dating of Quaternary marine terraces from the coastal part of Eastern Black Sea and their tectonic implications for the Eastern Pontides, Turkey

2021 ◽  
Keyword(s):  
Black Sea ◽  
Luminescence Dating ◽  
Eastern Pontides ◽  
Tectonic Implications ◽  
Marine Terraces

scholarly journals In search of marine terraces from Central Dobrogea (Casimcea Plateau, Western Black Sea). Preliminary inquires on distribution, extension and vertical crustal movements

2020 ◽  
Vol 22 (1) ◽  
pp. 87-97
Author(s):  
Alexandru BERBECARIU ◽  
Alfred VESPREMEANU-STROE
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Altitude Range ◽  
Crustal Movements ◽  
Paleoenvironmental Changes ◽  
Marine Terraces ◽  
Elevation Difference ◽  
Study Sites ◽  
Vertical Crustal Movements ◽  
Northern Sector

Casimcea Plateau is an uplifted (exhumated) peneplain cut in Proterozoic green–schists and one of the oldest tec­tonic units around the Black Sea. Despite its overall monotonous physiognomy, the plateau is crossed by Casimcea Valley and presents a seaward façade to the east which preserves (sub)horizontal surfaces as testimonies of the paleoenvironmental changes (sea level and climate). This research aims to identify the marine and fluvio–marine terraces and to define their vertical distribution based on the morphometric analysis of two study sites (north – Ceamurlia; south – Tașaul Lake) using EU-DEM. 6 levels were identified as possible marine terraces within the 2–50 m altitude range and also some inferences were made concerning the age of the lower three levels. Also, the present work highlights a differential (stronger) uplift of the northern sector between Peceneaga – Camena and Ostrov – Sinoe faults reflected by both the elevation difference of 5–6 m between the terraces staircases identified at the two sites and by the elevation gaps analysed on an array of cross-fault transects carried on over Ostrov – Sinoe fault.  

scholarly journals Arctic soil development on a series of marine terraces on Central Spitsbergen, Svalbard: a combined geochronology, fieldwork and modelling approach

2015 ◽  
Vol 2 (2) ◽  
pp. 1345-1391 ◽  
Author(s):  
W. M. van der Meij ◽  
A. J. A. M. Temme ◽  
C. M. F. J. J. de Kleijn ◽  
T. Reimann ◽  
G. B. M. Heuvelink ◽  
...  
Keyword(s):  
Chemical Weathering ◽  
Soil Formation ◽  
Luminescence Dating ◽  
Field Observations ◽  
Rill Erosion ◽  
Natural Experiments ◽  
Landscape Development ◽  
Marine Terraces ◽  
Arctic Soil ◽  
Soil Landscape

Abstract. Soils in Arctic regions currently enjoy significant attention because of their potentially substantial changes under climate change. It is important to quantify the natural processes and rates of development of these soils, to better define and determine current and future changes. Specifically, there is a need to quantify the interactions between various landscape and soil forming processes that together have resulted in current soil properties. Soil chronosequences are ideal natural experiments for this purpose. In this contribution, we combine field observations, luminescence dating and soil-landscape modelling to test and improve our understanding about Arctic soil formation. Our field site is a Holocene chronosequence of gravelly raised marine terraces in central Spitsbergen. Field observations suggest that soil-landscape development is mainly driven by weathering, silt translocation, aeolian deposition and rill erosion. Spatial soil heterogeneity is mainly caused by soil age, morphological position and depth under the surface. Substantial organic matter accumulation only occurs in few, badly drained positions. Luminescence dating confirmed existing radiocarbon dating of the terraces, which are between ~ 3.6 and ~ 14.4 ka old. Observations and ages were used to parameterize soil landscape evolution model LORICA, which was subsequently used to test the hypothesis that our field-observed processes indeed dominate soil-landscape development. Model results indicate the importance of aeolian deposition as a source of fine material in the subsoil for both sheltered beach trough positions and barren beach ridge positions. Simulated overland erosion was negligible. Therefore, an un-simulated process must be responsible for creating the observed erosion rills. Dissolution and physical weathering both play a major role. However, by using present day soil observations, relative physical and chemical weathering could not be disentangled. Discrepancies between field and model results indicate that soil formation is non-linear and driven by spatially and temporally varying boundary conditions which were not included in the model. Concluding, Arctic soil and landscape development appears to be more complex and less straight-forward than could be reasoned from field observations.

scholarly journals Jurassic to Cenozoic Magmatic and Geodynamic Evolution of the Eastern Pontides and Caucasus Belts, and Their Relationship With the Eastern Black Sea Basin Opening

Tectonics ◽  
2020 ◽  
Vol 39 (10) ◽  
Author(s):  
Marc Hässig ◽  
Robert Moritz ◽  
Alexey Ulianov ◽  
Nino Popkhadze ◽  
Ghazar Galoyan ◽  
...  
Keyword(s):  
Black Sea ◽  
Geodynamic Evolution ◽  
Eastern Pontides

scholarly journals Arctic soil development on a series of marine terraces on central Spitsbergen, Svalbard: a combined geochronology, fieldwork and modelling approach

SOIL ◽  
2016 ◽  
Vol 2 (2) ◽  
pp. 221-240 ◽  
Author(s):  
W. Marijn van der Meij ◽  
Arnaud J. A. M. Temme ◽  
Christian M. F. J. J. de Kleijn ◽  
Tony Reimann ◽  
Gerard B. M. Heuvelink ◽  
...  
Keyword(s):  
Chemical Weathering ◽  
Soil Formation ◽  
Luminescence Dating ◽  
Field Observations ◽  
Rill Erosion ◽  
Natural Experiments ◽  
Landscape Development ◽  
Marine Terraces ◽  
Arctic Soil ◽  
Soil Landscape

Abstract. Soils in Arctic regions currently enjoy attention because of their sensitivity to climate change. It is therefore important to understand the natural processes and rates of development of these soils. Specifically, there is a need to quantify the rates and interactions between various landscape- and soil-forming processes. Soil chronosequences are ideal natural experiments for this purpose. In this contribution, we combine field observations, luminescence dating and soil–landscape modelling to improve and test our understanding of Arctic soil formation. The field site is a Holocene chronosequence of gravelly raised marine terraces in central Spitsbergen. Field observations show that soil–landscape development is mainly driven by weathering, silt translocation, aeolian deposition and rill erosion. Spatial soil variation is mainly caused by soil age, morphological position within a terrace and depth under the surface. Luminescence dating confirmed existing radiocarbon dating of the terraces, which are between  ∼  1.5 and  ∼  13.3 ka old. The soil–landscape evolution model LORICA was used to test our hypothesis that the field-observed processes indeed dominate soil–landscape development. Model results additionally indicated the importance of aeolian deposition as a source of fine material in the subsoil for both sheltered and vegetated trough positions and barren ridge positions. Simulated overland erosion was negligible. Consequently, an un-simulated process must be responsible for creating the observed erosion rills. Dissolution and physical weathering both play a major role. However, using present-day soil observations, the relative contribution of physical and chemical weathering could not be disentangled. Discrepancies between field and model results indicate that soil formation is non-linear and driven by spatially and temporally varying boundary conditions which were not included in the model. To conclude, Arctic soil and landscape development appears to be more complex and less straightforward than could be reasoned from field observations.

scholarly journals Geomorphic evidence for active tectonic deformation in the coastal part of Eastern Black Sea, Eastern Pontides, Turkey

2018 ◽  
Vol 30 (1) ◽  
pp. 249-264 ◽  
Author(s):  
Mustafa Softa ◽  
Tahir Emre ◽  
Hasan Sözbilir ◽  
Joel Q. G. Spencer ◽  
Mehmet Turan
Keyword(s):  
Black Sea ◽  
Tectonic Deformation ◽  
Eastern Pontides ◽  
Active Tectonic
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