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SETSCI - Volume 3 (2018)
ISAS2018-Winter - 2nd International Symposium on Innovative Approaches in Scientific Studies, Samsun, Turkey, Nov 30, 2018

Gravity Anomalies on Continental Edgings (ISAS2018-Winter_14)
Ali Elmas1*
1Karadeniz Technical University , Trabzon, Turkey
* Corresponding author: elmas@ktu.edu.tr
Published Date: 2019-01-14   |   Page (s): 86-88   |    9     5

ABSTRACT Large-scale gravity anomalies come from the differences in density situated deep lithosphere. In this study, the
analysis of the gravity anomalies of passive margins is made according to the Airy isostasy model. This analysis is made with
the data commonly known as free air and Bouguer anomalies. Whether isostasy improved in the oceanic and continental
regions is determined by analysis of Bouguer and free air anomalies. Both anomalies offer characteristic changes in the region
that the balance occurred or not in. Denser oceanic plate dives under the continental plate in subduction zones. Large
earthquakes and active volcanism occur in these areas. They are active tectonic margins and isostasy equilibrium state is not
formed. Transition occurs from continental crust to oceanic crust in a tectonic plate as for in the passive continental margins
and mentioned tectonic movements does not occur. In this study, whether tectonic margin is passive has been investigated on
simplified models according to the Airy isostasy model.  
KEYWORDS Gravity, Airy Isostasy Model, Bouguer Anomaly, Free Air Anomaly, Passive Margin
REFERENCES [1] Fowler, C.M.R. 1991. The Solid Earth: An Introduction to Global Geophysics, Cambridge University Press, New York, 472 pp.
[2] Lillie, R.J., 1999, Whole Earth Geophysics: An Introductory Textbook for Geologist and Geophysicists: Prentice Hall, New Jersey, 361 pp.
[3] Oruç, Bülent., 2012. Teori ve Örneklerle Gravimetri. ISBN: 978-605- 5936-65-5, Umuttepe Yayınları.
[4] Robinson, E. S. And Çoruh, C., 1988. Basic Exploration Geophysics. ISBN: 047187941X, John Wiley & Sons.
[5] Telford, W.M., Gilbert, L.P. ve Sheriff, R.A., 1990. Applied geophysics, 2nd edition: Cambridge Univ.Press.

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