Origin of plagiogranites in oceanic complexes: A case study of the Nicoya and Santa Elena terranes, Costa Rica
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- 作者：Scott A. Whattama ; whattam@korea.ac.kr" class="auth_mail" title="E-mail the corresponding author ; Esteban Gazelb ; Keewook Yic ; Percy Denyerd ; percy.denyer@ucr.ac.cr" class="auth_mail" title="E-mail the corresponding author
- 关键词：Plagiogranite ; Ophiolite ; Central America ; Costa Rica ; Nicoya ; Santa Elena
- 刊名：Lithos
- 出版年：2016
- 出版时间：1 October 2016
- 年：2016
- 卷：262
- 期：Complete
- 页码：75-87
- 全文大小：9725 K
文摘
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Plagiogranite zircons of Santa Elena and Nicoya yield SHRIMP 206Pb/238U ages of 125.3 ± 2.0 Ma and 90.9 ± 2.0 Ma to 88.5 ± 2.0 Ma, respectively.
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Modeling suggests that Nicoya plagiogranites are ~ 10-15% residual liquids after fractional crystallization from its mafic parental source.
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Plagiogranite chemistry is consistent with an oceanic arc and a MOR to oceanic plateau origin for Santa Elena and Nicoya, respectively.