Melting of crustal xenoliths within ascending basalt: Example from the Kula volcanic field, western Anatolia, Turkey

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• 作者：Hasan Bayhan ; Erkan Aydar ; Erdal Sen and Alain Gourgaud
• 关键词：Xenolith melting ; Hercynite ; Rhyolitic glass ; Vesicles
  Mots-clé ; s ; Fusion de xé ; nolithes ; Hercynite ; Verre rhyolitique ; Vé ; sicules
• 刊名：Comptes Rendus Geoscience
• 出版年：2006
• 出版时间：March 2006
• 年：2006
• 卷：338
• 期：4
• 页码：237-243
• 全文大小：319 K

文摘

During its storage or ascent, basaltic magma inevitably interacts with the surrounding rocks. In this study, schist xenoliths incorporated within ascending basalt are examined. Heating of the xenoliths combined with decompression effect of rapid magma uprise led to dehydration melting of hydrous minerals producing hercynitic spinel, melt, sillimanite and FeTi oxides. The melt is rhyolitic, strongly peraluminous (1.77 < A/CNK < 2.35) and corundum normative. It may contain up to 8 wt % FeO_t. It occurs between the foliation planes and in the intragranular environment. Dehydration melting of micas in the schist is probably related to combined effects of heating by basaltic magma and decompression due to the rapid rise. Melting of xenoliths was a progressive process at low pressure. To cite this article: H. Bayhan et al., C. R. Geoscience 338 (2006).