Petrology of Kula Volcanic Province, Western Turkey

Petrology of Kula Volcanic Province, Western Turkey

Bibliographic Details
Main Author: Sölpüker, Utku
Language:English
Published: University of Cincinnati / OhioLINK 2007
Subjects:
Geology
alkaline rocks
oxygen fugacity
dP/dT
polybaric fractionation
fractional melting
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ucin1187013478
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ucin11870134782021-08-03T06:12:08Z Petrology of Kula Volcanic Province, Western Turkey Sölpüker, Utku Geology alkaline rocks oxygen fugacity dP/dT polybaric fractionation fractional melting <p>Three episodes of alkaline volcanism of Quaternary age have been recognized in the Kula Volcanic Province (KVP) in Western Turkey. The alkaline volcanic rocks of the KVP vary in composition from basanite to tephriphonolite and from trachybasalt to basaltic trachyandesite. Measured values for <sup>87</sup>Sr/<sup>86</sup>Sr and <sup>143</sup>Nd/<sup>144</sup>Nd in the rocks of the KVP range from 0.703029 to 0.703534 and 0.512773 to 0.512998, respectively, (Gulec, 1991; Alici, et al., 2002) suggesting that an isotopically depleted mantle component is involved in the genesis of the Kula lavas. This mantle component is also enriched in the most incompatible elements, as shown by OIB-like primitive mantle normalized multi-element patterns, this indicates that enrichment of the mantle source is probably a recent event.</p><p>The pMELTS algorithm of Ghiorso, et al., (2002) can be used to show that low degrees of partial melts, generated by fractional melting of a spinel peridotite mantle source (Maaloe and Aoki, 1977), can produce the alkaline magmas of the KVP. Assuming an underlying heat source, I used pMELTS to model the melting behavior of an average spinel peridotite mantle composition at melting at 23 kbar (~80 km) in the presence of 0.1% H<sub>2</sub>O at <i>f</i>O<sub>2</sub> = QFM-1. The degree of partial melting is 8% for the KVP rocks and the primary magma composition is then subjected to polybaric fractional crystallization from 23 to 4 kbar. The compositional diversity displayed by the Kula volcanic rocks is reproduced successfully by the pMELTS polybaric fractionation calculations when the dP/dT gradient is set to 42 and 25 in the mantle and crust, respectively, and the oxygen fugacity is increased from one log unit below to one log unit above the QFM buffer at 13 kbar.</p><p>Generation and evolution of the Kula magmas were simulated successfully by using pMELTS. Eight per cent fractional melting of an average spinel lherzolite composition at 23 kbar generated the primary magma and polybaric fractional crystallization simulations with changing dP/dT and fO<sub>2</sub> conditions generated diverse compositions that match the rocks of the KVP successfully.</p> 2007-10-09 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1187013478 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1187013478 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Geology
alkaline rocks
oxygen fugacity
dP/dT
polybaric fractionation
fractional melting
spellingShingle Geology
alkaline rocks
oxygen fugacity
dP/dT
polybaric fractionation
fractional melting
Sölpüker, Utku
Petrology of Kula Volcanic Province, Western Turkey
author Sölpüker, Utku
author_facet Sölpüker, Utku
author_sort Sölpüker, Utku
title Petrology of Kula Volcanic Province, Western Turkey
title_short Petrology of Kula Volcanic Province, Western Turkey
title_full Petrology of Kula Volcanic Province, Western Turkey
title_fullStr Petrology of Kula Volcanic Province, Western Turkey
title_full_unstemmed Petrology of Kula Volcanic Province, Western Turkey
title_sort petrology of kula volcanic province, western turkey
publisher University of Cincinnati / OhioLINK
publishDate 2007
url http://rave.ohiolink.edu/etdc/view?acc_num=ucin1187013478
work_keys_str_mv AT solpukerutku petrologyofkulavolcanicprovincewesternturkey
_version_ 1719432648680538112

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