New age and geochemical constraints on the origin of Quaternary adakite-like lavas in the Arabia-Eurasia collision zone
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- 作者：Kwan-Nang Panga ; knpang@earth.sinica.edu.tw" class="auth_mail" title="E-mail the corresponding author ; Sun-Lin Chunga ; b ; Mohammad Hossein Zarrinkoubc ; Xian-Hua Lid ; Hao-Yang Leea ; Te-Hsien Linb ; Han-Yi Chiua
- 关键词：Adakite ; Iran ; Lower crust ; Quaternary ; Slab melt ; Zircon U&ndash ; Pb age
- 刊名：Lithos
- 出版年：2016
- 出版时间：1 November 2016
- 年：2016
- 卷：264
- 期：Complete
- 页码：348-359
- 全文大小：2687 K
文摘
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New SIMS zircon U–Pb ages indicate eruption of adakite-like lavas at Anar, Iran at ca. 1 to 2 Ma.
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Extreme depletion in Y, HFSE and HREE relative to LREE and MREE in the lavas
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Slab melting and fractionation-related models are unlikely in generating the adakitic signature.
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Partial melting of juvenile source rocks in thickened lower crust makes better sense in view of the age and geochemical data.
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The previous concept of an ‘adakitic province’ no longer holds.