Helium and heat distribution in western Anatolia, Turkey: Relationship to active extension and volcanism

Date

2004-04-01

Author

Güleç, Nilgün Türkan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

31
views

0
downloads

Western Anatolia, one of the world's best-known extensional terrains, is characterized by the presence of several moderate- to high-enthalpy geothermal fields. Geothermal fluids have helium isotope compositions reflecting mixing between mantle and crustal helium components, the former ranging between 0.58% and 45% of the total helium in a given sample. Regarding the distribution of heat and mantle He and their correlation with tectonic structure and volcanism in western Anatolia, the prominent features are as follows: (1) the association between highest heat and highest (3)He lies along the eastern segment of the Buyuk Menderes graben, (2) the high heat and high (3)He occur in the vicinity of the Quaternary Kula volcanism, (3) high-enthalpy fields exist in close vicinity to the young alkaline volcanics, (4) relatively high mantle He contributions occur in areas of not only the young alkaline, but also the old calc-alkaline volcanics, and (5) there is a lack of volcanic exposures along the Buyuk Menderes graben (except at its western and southeastern terminations), where the highest values are recorded for both heat and helium. The first three features collectively suggest that the transfer mechanism for both heat and helium is probably mantle melting accompanying the current extension in western Anatolia, yet the latter two further indicate that this may be accomplished via subsurface plutonic activities. The large range observed in the helium isotope compositions may be linked with differential (local) extension rates and associated melt generation in the respective areas. This suggestion can be substantiated by He isotope data from more of the region.

Subject Keywords

Mantle He, Heat, Volcanism, Extension, Melt generation

URI

https://hdl.handle.net/11511/42630

DOI

https://doi.org/10.1130/2006.2409(16)

Collections

Department of Geological Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Helium isotope variations in Turkey: relationship to tectonics, volcanism and recent seismic activities Güleç, Nilgün Türkan; Mutlu, H (2002-07-01) The distribution of helium isotope ratios in the various tectonic provinces of Turkey is examined through a synthesis of previously published data and the results of a recent survey along the North Anatolian Fault Zone (NAFZ) following the catastrophic 1999 earthquakes. The R/R-A values (where R = sample He-3/He-4 and RA = air He-3/He-4) cover a wide range from 0.05 to 7.87, and the mantle-derived helium is clearly identified in most locations, The mantle-derived component is high (> 50% of total He) in (a)...
Strike-slip neotectonic regime and related structures in the Cappadocia region: a case study in the Salanda basin, Central Anatolia, Turkey Kocyigit, Ali; DOĞAN, UĞUR (2016-01-01) The study area is a strike-slip basin of approximately 1-9 km wide, 66 km long and N65 degrees W trending, located between the historical Kesikkopru in the west and the Sarihidir settlement in the east along the northern side of the Central Anatolian Volcanic Province. It was evolved on a regional erosional surface of a pre-Quaternary volcanosedimentary sequence during Quaternary. This is evidenced by the stratigraphical, structural, and seismic data. The total amounts of throw and dextral strike-slip displ...
Geochemical features of multi component mantle source domains beneath Central Anatolia Kürkçüoğlu, Biltan; Furman, Tanya; Pickard, Megan; Şen, Erdal; Hanan, Barry; Şen, Pınar; Sayıt, Kaan; Yürür, Mehmet Tekin (2016-05-16) Extensive volcanic activities were developed in Central Anatolia, due to dynamic nature o f the tectonic regime. Although the most of the volcanic zones are represented by major Stratovolcanoes, severe basaltic magmatism with lack of the central cones, were generated over all the Central Anatolia. In this study, we focus on Sivas mafic product s to shed more light on the mantle components, beneath the central Anatolia , that were not investigated in depth so far. Sivas mafic lavas are the mo...
Structural, lithological, and geodynamic controls on geothermal activity in the Menderes geothermal Province (Western Anatolia, Turkey) Roche, Vincent; Bouchot, Vincent; Beccaletto, Laurent; Jolivet, Laurent; Guillou-Frottier, Laurent; Tuduri, Johann; Bozkurt, Erdin; Oguz, Kerem; Tokay, Bülent (2019-02-01) Western Turkey belongs to the regions with the highest geothermal potential in the world, resulting in significant electricity production from geothermal resources located predominantly in the Menderes Massif. Although geothermal exploitation is increasingly ongoing, geological, and physical processes leading to the emplacement of geothermal reservoirs are hitherto poorly understood. Several studies on the Menderes Massif led to different interpretations of structural controls on the location of hot springs...
Coiled Tubing Acid Stimulation of Alasehir Geothermal Field Turkey Akın, Serhat; Yazman, Metin; Karadağ, Mahmut; Seçkin, Cemil; Tonguç, Erinç; Gürel, Emrah; Yarım, Harun (null; 2015-04-26) Alaşehir geothermal area located in Alaşehir Graben, West Anatolia – Turkey is the current target for geothermal field development. Currently, more than 6 operators are developing the power capacity in this field on a strictly competitive, and largely confidential, basis without significant exchange of resource information among them. Although there are three binary and a combined flash-binary power plants with widely changing power generation efficiency between plants, additional new plant capacity will be...

Citation Formats

N. T. Güleç, “Helium and heat distribution in western Anatolia, Turkey: Relationship to active extension and volcanism,” 2004, vol. 409, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42630.