Fluid-related modifications of Cr-spinel and olivine from ophiolitic peridotites by contact metamorphism of granitic intrusions in the Ablah area, Saudi Arabia
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- 作者：Ahmed Hassan Ahmeda ; b ; ahmohammed@kau.edu.sa" class="auth_mail" title="E-mail the corresponding author ; ahmh2jp@yahoo.com" class="auth_mail" title="E-mail the corresponding author ; Adel Abdullah Surourc ; adelsurour@hotmail.com" class="auth_mail" title="E-mail the corresponding author
- 关键词：Serpentinized peridotites ; Contact metamorphism ; Cr-spinel ; Ferritchromite ; Atoll texture ; Ablah ; Saudi Arabia
- 刊名：Journal of Asian Earth Sciences
- 出版年：2016
- 出版时间：15 May 2016
- 年：2016
- 卷：122
- 期：Complete
- 页码：58-79
- 全文大小：14267 K
文摘
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The Ablah peridotites are partly or fully serpentinized due to contact metamorphism.
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Three distinct modification patterns of Cr-spinel are identified.
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Simple zoning with sharp contacts between cores and rims results from solid-state alteration.
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Weakly zoned and atoll-textured patterns result from high fluid/rock ratio alteration.
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Petrogenesis and metamorphic evolution of Ablah peridotites are predicted.