LUMINESCENCE DATING OF THE MINJIANG HEADWATER TERRACES AND ITS GEOMORPHOLOGICAL IMPLICATION

2017 ◽  
Author(s):  
Yesong Han ◽  
◽  
Jiafu Zhang ◽  
Zhijiu Cui ◽  
Gengnian Liu
Keyword(s):  
Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1269
Author(s):  
George Alexandrakis ◽  
Stelios Petrakis ◽  
Nikolaos A. Kampanis

Understanding the processes that govern the transformation of the landscape through time is essential for exploring the evolution of a coastal area. Coastal landscapes are dynamic sites, with their evolution strongly linked with waves and sea level variations. Geomorphological features in the coastal area, such as beachrock formations and dune fields, can function as indicators of the coastal landscape evolution through time. However, our knowledge of the chronological framework of coastal deposits in the Aegean coasts is limited. Optically Stimulated Luminescence dating techniques are deemed to be very promising in direct dating of the coastal sediments, especially when they are linked with archaeological evidence. The dating of the sediments from different sediment core depths, determined by the method of luminosity, allowed us to calculate the rate of sediment deposition over time. More recent coastal evolution and stability were examined from 1945 to 2020 with the use of aerial photographs and satellite images. This paper presents the 6000 ka evolution of a coastal landscape based on geomorphological, archaeological, and radio-chronological data. Based on the results, the early stages of the Ammoudara beach dune field appears to have been formed ~9.0–9.6 ka BP, while the OSL ages from 6 m depth represented the timing of its stabilization (OSL ages ~5–6 ka). This indicates that the dune field appears to already have been formed long before the Bronze Age (5–10 ka BP). It became stabilized with only localized episodes of dune reactivation occurring. In contrast, while high coastal erosion rates were calculated for modern times.


Author(s):  
Richard O. Fakolade ◽  
Philip R. Ikhane ◽  
Qiuyue Zhao ◽  
Qingzhen Hao ◽  
Helena Alexanderson ◽  
...  

2009 ◽  
Vol 44 (5-6) ◽  
pp. 488-493 ◽  
Author(s):  
P. Guibert ◽  
I.K. Bailiff ◽  
S. Blain ◽  
A.M. Gueli ◽  
M. Martini ◽  
...  

2009 ◽  
Vol 21 (5) ◽  
pp. 483-499 ◽  
Author(s):  
Glenn W. Berger ◽  
Sara Ante ◽  
Eugene W. Domack

AbstractSediment trap arrays were deployed in Brialmont Cove and Andvord Bay, eastern Gerlache Strait, from December 2001–March 2003. The recovered sediments (representing instantaneous deposition from the viewpoint of luminescence dating) encompass all the annual and local glaciomarine depositional processes. Magnetic susceptibility profiles were used to infer seasonality in the trap cores, and thus to select subsamples for luminescence measurements. Multi-aliquot infrared stimulated luminescence (IRSL) apparent ages were used to assess the effectiveness of ‘clock zeroing’ (by daylight) of light sensitive luminescence within fine silt polymineral samples from each trap depth. IRSL apparent ages for 24 samples indicate that the largest age-depth differences occur with the autumn season samples at both trap sites, suggesting a previously unrecognized and regional (within the Gerlache Strait) change in depositional controls in the autumn compared to other seasons. The apparent ages also indicate some differences between the fjords, and a more complex oceanographic regime at Andvord Bay than at Brialmont Cove. Dry-mass sediment fluxes varied from 0.4 to 0.7 g cm-2 yr-1, with the largest flux at Brialmont Cove (∼0.7 g cm-2 yr-1) occurring in the bottom trap, whereas at Andvord Bay, the largest flux (∼0.6 g cm-2 yr-1) occurred in the middle trap (∼45 m above seafloor).


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