Petrology of blueschist from the Western Himalaya (Ladakh, NW India): Exploring the complex behavior of a lawsonite-bearing system in a paleo-accretionary setting
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- 作者：Chiara Groppoa ; b ; chiara.groppo@unito.it" class="auth_mail" title="E-mail the corresponding author ; Franco Rolfoa ; b ; Himanshu K. Sachanc ; Santosh K. Raic
- 关键词：Lawsonite blueschist ; cold subduction processes ; paleo-accretionary prism ; thermodynamic modeling ; P&ndash ; T evolution ; Western Himalaya
- 刊名：Lithos
- 出版年：2016
- 出版时间：May 2016
- 年：2016
- 卷：252-253
- 期：Complete
- 页码：41-56
- 全文大小：5130 K
文摘
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The Sapi–Shergol lawsonite-blueschist metasediments are petrologically investigated.
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They experienced cold subduction history (7–8 °C/km gradient) up to 470 °C, 19 kbar.
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The presence of Fe+ 3 has a non-negligible effect on P estimates.
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Simultaneous growth of Grt and Lws implies discussion on equilibrium/nonequilibrium.
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Peak PT estimates are close to those of blueschist accretionary complexes worldwide.