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Brecciated and hydrothermally altered orthogneiss‐amphibolite complex in the Maniitsoq structure, West Greenland. Inset: variably hydrothermally altered zircon with reset U‐Pb systematics, yielding a hydrothermal age of 3000.9 ± 1.9 Ma. The hydrothermal alteration of regional extent took place at up...
Published in: | Meteoritics & Planetary Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2013
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Subjects: | |
Online Access: | http://dx.doi.org/10.1111/maps.12209 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmaps.12209 https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.12209 |
Summary: | Brecciated and hydrothermally altered orthogneiss‐amphibolite complex in the Maniitsoq structure, West Greenland. Inset: variably hydrothermally altered zircon with reset U‐Pb systematics, yielding a hydrothermal age of 3000.9 ± 1.9 Ma. The hydrothermal alteration of regional extent took place at upper amphibolite facies, and is interpreted as due to infl ux of (sea?) water and development of a crustal‐scale hydrothermal convection cell in a now deeply exhumed Archaean impact structure. A. Scherstén and A. A. Garde discuss the details in their paper on pp. 1472–1498. (Images courtesy of Adam Garde and Leif Johansson.) |
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