Helium-3 Distribution in Western Turkey

Yıl 1988, Cilt: 108 Sayı: 108, 35 - 42, 01.01.1988

Nilgün Güleç

Öz

 In this study, to investigate the mantle-crust interaction in Western Turkey, geothermal fluids
from various locations are analyzed for their
3He/4He ratios. The results reveal a mixing between mantle - and
(continental) crustal - helium components. The distribution of mantle-helium, which is characterized by high
3He/4He ratios, does not show any correlation with the spatial and/or temporal distribution of the surface
volcanics in the region, but appears to be governed by the distribution of tectonic deformation. The lack of any
correlation between the distribution of mantle-helium and surface volcanism suggests that helium, now degassing
from mantle, has most probably entered the crust in association with the melts emplaced at deeper levels. The
fault systems of the present extensional tectonics are thought to have had an efficient role in the escape of helium
to the surface through the brittle parts of crust.

Anahtar Kelimeler

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Kaynakça

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