Radiochronology of sediments from various regions of the Mediterranean Sea by direct gamma spectroscopy using natural 210Pb, 226Ra and fallout 137Cs
Author
Tadjiki, Soheyl
Advisor
Erten, Hasan N.
Date
1992Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
The and profiles are determined at two locations in southern
coast of Spain, Three locations in southern coast of Turkey and two locations
in coast of Cyprus. Compaction-corrected sedimentation rates are
derived for all locations using data. The rates range from 1..39± 0.12
crn.y"' (0.50±0.04 g.cm“^.y“^) to 0.08±0.01 cm.y“^ (0.039±0.003 g.cm~'^.y“^)
(0.50±0.04g.cm"^.y~^). Except for BC-6A, for all of the locations the ^^’^Cs
profile is used to compute sedimentation rates which are in a good agreement
with those of '^^°Pb method. The result of the Constant Initial Concentration
and Constant Rate of Supply dating models are in a good agreement with each
other whereas in BC-6A and KS-1 cores only Constant Rate of Supply model
is valid to calculate sedimentation rate. The flux of unsupported '^^°Pb vary
between 0.74±0.01 pCi.cm“^ and 0.11 ±0.03 pCi.cm“^. The average depositional
flux is found to be considerably low in the coast of Turkey and Cyprus,
whereas it is found to be high in the coast of Spain.
Keywords
210 Pb137 Cs
Sedimentation rate
Cs profile
Constant Initial
Constant Rate of Supply model
The flux of unsupported 210 pb
Concentration model