Hydrothermal alterations and relationship with thermal waters at aliaga (İzmir) geothermal field [Aliaga (İzmir) jeotermal alani{dotless}ndaki hidrotermal alterasyonlar ve termal sularla i·lişkisi]
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the alteration zones and geothermal geology of Aliaga area and surroundings have been investigated. The alteration zones and reservoir temperature have been determined via the use of the alteration minerals and geochemical properties of waters issuing in the area. The study area, which is lying between Çandarli{dotless} Bay and Menemen in western Anatolia has a rock association consisting of volcanic and sedimentary rocks. Miocene aged volcanic rocks are composed of andesitic, latitic andesitic, basaltic andesitic, rhyolitic lavas and associated pyroclastics. Miocene aged sedimentary rocks are terrestrial and lacustrine type. There are several fault systems trending NE-NW, which control the movement of geothermal fluids in the region. As a result of microscopical investigations of the rock samples collected from the alteration zones, silicification is observed in most of the rocks. Additionally, chloritisation and clay minerals are also seen. The chemical character of hot spring and well water in the geothermal area indicate that the source watersfeeding these springs and wells are meteoric and sea water in origin. There are two types of geothermal fluids causing the hydrothermal alteration in the area. These are bicarbonate and chloride type waters. Hydrothermal alteration types have been determinated by using the alteration minerals recognized in the rock samples of study area. The reservoir temperature of the present day geothermal system has been determined by applying chemical geothermometer techniques to water samples. According to the data obtained from rock analyses, the alteration types in the region are advanced argillic, argillic and outer-sub propylitic alteration. The characteristic alteration mineral assemblages indicate a fluid temperature reaching up to 175 oC in the paleogeothermal system of the area. However, it is estimated that the reservoir rock temperatures of the active geothermal system may be around 100-130 oC.
Açıklama
Anahtar Kelimeler
Aliaga, Geothermal system, Geothermometer, Hydrothermal alteration
Kaynak
Yerbilimleri/ Earth Sciences
WoS Q Değeri
Scopus Q Değeri
Cilt
32
Sayı
1
