Origin of hydrous alkali feldspar-silica intergrowth in spherulites from intra-plate A<sub>2</sub>-type rhyolites at the Jabal Shama, Saudi Arabia

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Origin of hydrous alkali feldspar-silica intergrowth in spherulites from intra-plate A₂-type rhyolites at the Jabal Shama, Saudi Arabia

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作者：Adel A. Surour^a ; ^{adelsurour@hotmail.com" class="auth_mail" title="E-mail the corresponding author} ; ^{adelsurour@cu.edu.eg" class="auth_mail" title="E-mail the corresponding author} ; Said A. El-Nisr^b ; ^c ; Rami A. Bakhsh^b
关键词：Jabal Shama ; Rhyolites ; Intra-plate ; Spherulites ; Hydrous feldspars
刊名：Journal of African Earth Sciences
出版年：2016
出版时间：March 2016
年：2016
卷：115
期：Complete
页码：92-107
全文大小：5168 K

文摘

•: Jabal Shama rhyolites are products of intra-plate magmatism.
•: Silicic volcanism took place during early phases of Red Sea rifting.
•: Thinly-laminated tuffs and spherulitic rhyolites are abundant.
•: Spherulites have unique hydrous alkali-feldspar-silica intergrowths.
•: Destabilization of silicates, and the role of magmatic and brine waters in evolution of spherulitess.

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