Taconian retrograde eclogite from northwest Connecticut, USA, and its petrotectonic implications
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- 作者：Xu Chua ; xu.chu@yale.edu" class="auth_mail" title="E-mail the corresponding author ; Jay J. Aguea ; b ; Jennifer A. Axlera ; Meng Tiana
- 关键词：Eclogite ; Taconic orogeny ; Pseudosection ; Symplectite ; New England
- 刊名：Lithos
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：240-243
- 期：Complete
- 页码：276-294
- 全文大小：4851 K
文摘
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We confirm the presence of Taconian eclogite in northwest Connecticut.
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The P–T path is characterized by a post-peak-T pressure increase of > 5 kbar.
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The protoliths were likely rifting-related mafic dikes that intruded in the Early Cambrian.
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A new U–Pb zircon age of 456 ± 4.6 Ma (2σ) dates the timing of high-pressure metamorphism.
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Taconic metamorphism took place ~ 10 Myr later in Connecticut than in Newfoundland.