Time constraints on deformation of the Ajjaj branch of one of the largest Proterozoic shear zones on Earth: The Najd Fault System
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- 作者：M. Hassana ; b ; e ; mahmoud.ali-hassan@uni-graz.at" class="auth_mail" title="E-mail the corresponding author ; K. Stü ; wea ; T.S. Abu-Alamc ; d ; e ; U. Klö ; tzlif ; M. Tiepolog
- 关键词：U&ndash ; Pb ; Zircon ; Deformation ; P-T condition ; Ajjaj shear zone ; Arabian&ndash ; Nubian Shield
- 刊名：Gondwana Research
- 出版年：2016
- 出版时间：June 2016
- 年：2016
- 卷：34
- 期：Complete
- 页码：346-362
- 全文大小：3657 K
文摘
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Ajjaj shear zone activity can be limited in the time interval of 604–581 Ma.
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Ajjaj shearing causes mylonitization of synchronous granite.
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Undeformed granite (581 ± 4 Ma) marked the termination of Ajjaj activity.
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Ajjaj shear zone exhumed metamorphic rocks from different depths 28–38 up to 58 km.
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Hamadat complex was metamorphosed at different grades (high and medium).