Timing and conditions of regional metamorphism and crustal shearing in the granulite facies basement of south Namibia: Implications for the crustal evolution of the Namaqualand metamorphic basement in the Mesoproterozoic
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- 作者：Julia Biala ; Steffen Bü ; ttnerb ; s.buettner@ru.ac.za" class="auth_mail" title="E-mail the corresponding author ; Peter Appela
- 关键词：Continental back-arc setting ; Monazite geochronology ; High-temperature metamorphism ; Retrograde shearing
- 刊名：Journal of African Earth Sciences
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：123
- 期：Complete
- 页码：145-176
- 全文大小：16325 K
文摘
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Metamorphic evolution of metapelites reaching upper granulite facies conditions.
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Metamorphic peak at ∼1200 Ma followed by slow isobaric crustal cooling.
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Retrograde deformation at 1130-1120 Ma formed the amphibolite facies Grünau shear zone.
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No evidence of collisional tectonics in the central Namaqua Metamorphic Complex.
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The crust evolved in a continental back-arc environment.