Girit Adası ve Rodos Baseni’nin (Doğu Akdeniz) Dengeleme Mekanizmasının Girişim (Admittance) Fonksiyonu ile Araştırılması

Year 2020, Volume: 22 Issue: 65, 541 - 560, 15.05.2020

Ayça Çırmık , Oya Pamukçu

https://doi.org/10.21205/deufmd.2020226521

Abstract

Kabuğun
ve üst mantonun, topoğrafik yükleri 
gravitasyonel olarak nasıl dengelediği tektonik açıdan önemli bir kavramdır.
Bir bölgedeki yüklerin dengelenme durumu, o bölgeye ait topoğrafya ve gravite
verilerinin irdelenmesi ile belirlenebilmektedir. Tektonik olarak oldukça
karmaşık olan Doğu Akdeniz bölgesinin dengelenme mekanizması, girişim
(Admittance) fonksiyonun kullanılmasıyla literatür genelinde ilk olarak bu
çalışma kapsamında irdelenmiştir. Bu kapsamda, farklı topoğrafik/batimetrik,
gravitasyonel değerlere ve tektonik özelliklere sahip Doğu Akdeniz bölgesi,
Girit Adası ve Rodos baseni olmak üzere iki ayrı bölgeye ayrılarak incelenmiş,
gravite ve topoğrafya verileri arasındaki girişim (admittance) uyumundan
yararlanılarak bu bölgelerin efektif elastik kalınlık değerleri ve ayrıca
düz-ters çözüm teknikleri ile kabuk-manto ara yüzeyine ait bükülme derinlikleri
elde edilmiştir. Sonuç olarak, Doğu Akdeniz’de yer alan bu iki  bölgenin izostatik modellerinin Airy modeline
uymadığı, Girit Adası ve çevresi için efektif elastik kalınlık değerinin
ortalama 6 km olduğu, Rodos baseni ve çevresi için efektif elastik kalınlık
değerinin ortalama 8 km olduğu saptanmıştır. En uygun efektif elastik kalınlık
değerine karşılık gelen kabuk-manto ara yüzeylerine ait ortalama bükülme
derinliklerinin Girit Adası ve çevresinde yaklaşık 19-29 km, Rodos Baseni ve
çevresinde ise 20-32 km
arasında değiştiği saptanmıştır. 

Keywords

Doğu Akdeniz, Girit, Rodos baseni, Efektif Elastik kalınlık, Ters Çözüm, Girişim (Admittance) Fonksiyonu

Supporting Institution

Dokuz Eylül Üniversitesi Bilimsel Araştırma Projesi

Project Number

2006KBFEN031

Thanks

Trieste Üniversitesi’nden Prof. Dr. Carla Braitenberg’e Lithoflex yazılımına erişim ve Erasmus değişim program kapsamında birlikte çalışmamıza olanak sağlamasından dolayı teşekkür ederiz. Bu çalışma, Dokuz Eylül Üniversitesi 2006KBFEN031 nolu Bilimsel Araştırma Projesi kaspamında finansal olarak desteklenmiştir

Analyzing the Compensation Mechanism of Crete Island and Rhodos Basin (Eastern Mediterranean Sea) with Admittance Function

Abstract

It is a tectonically important
concept how the crust and the upper mantle gravitationally balancing the
topographic loads. Balancing the loads in a region can be determined by
examining the topographic and gravity data. In this study, the balancing
mechanism of Eastern Mediterranean region, which is quite tectonically complex,
was determined by using Admittance function as the first time in the literature.
In this context, Eastern Mediterranean region, which has different
topographic/bathymetric, gravity values and tectonic features, was divided into
two regions as Crete Island and Rhodos basin. 
The effective elastic thickness values of these regions were obtained by
using the coherency of admittance between gravity and topography values and
average flexure depths of the crustal-mantle interfaces were calculated by
forward-inverse solutions. As the result, it is determined that the isostatic
models of Eastern Mediterranean regions do not fit with the Airy model and the
effective elastic thickness values of Crete Island-its surroundings and Rhodos basin-its
surroundings are approximately 6 km and 8 km, respectively. The average flexure
depths of the crustal-mantle interfaces related to the optimal effective
elastic thickness value of Crete Island and Rhodos basin are approximately
19-29 km and 20-32 km, respectively.

Keywords

Eastern Mediterranean, Crete, Rhodos basin, effective elastic thickness, forward modelling, admittance analysis

Project Number

2006KBFEN031

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