Rb-Sr ages from phengite inclusions in garnets from high pressure rocks of the Swiss Western Alps
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- 作者：Caroline M.C. de Meyer
- 关键词：Rb&ndash ; Sr ; geochronology ; Western Alps ; garnet ; high pressure metamorphism ; Zermatt-Saas Fee ophiolite
- 刊名：Earth and Planetary Science Letters
- 出版年：1 June 2014
- 年：2014
- 卷：395
- 期：Complete
- 页码：205-216
- 全文大小：2831 K
文摘
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- <p id="pr0010">We apply Rb/Sr geochronology to phengite extracted from garnets.p>
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- <p id="pr0020">The garnets grew prograde in eclogites–facies metasediments.p>
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- <p id="pr0030">We show that garnet acted as a shield for the included phengites.p>
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- <p id="pr0040">Rb and Sr isotope exchange with the bulk rock was limited after inclusion.p>
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- <p id="pr0050">The phengites included in garnets are about 4 Ma older than the matrix phengites.p>