Origin of the reduced, amethyst-mineralized lower tier of the Cordillera Flow, southern Paraná Volcanic Province
Abstract The structure of two superposed layers within a redox-altered basaltic flow is restricted to the Paraná Volcanic Province among large igneous provinces. World-class amethyst-geode and agate-geode deposits occur in reduced Tier 1 of the Cordillera Flow (> 100 km long). Satellite and drone...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Sociedade Brasileira de Geologia
2025-06-01
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| Series: | Brazilian Journal of Geology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892025000100306&lng=en&tlng=en |
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