ISSN:
1432-1866
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract Paleozoic banded-iron-formation (BIF) deposits occur within the Nahuelbuta-Queule Complex (south central Chile) which hosts the following stratigraphic units: Cabo Tirúa (green schists, mica schists, and metacherts), Lleu-Lleu (iron-bearing metacherts, mica schists, and serpentinites), and Colcura (metagraywackes and metapelites). The lithological, structural, and geochemical characteristics of the Lleu-Lleu and Cabo Tirúa units indicate that they were part of a tectonic mélange accreted to the South American paleocontinent during the Paleozoic. BIF ores are restricted to the Lleu-Lleu metacherts and are characterized by oxide-silicate-sulfide BIF facies. The iron-bearing metacherts present mineralogical and geochemical characteristics close to the volcanogenic BIF types and are thought to have been formed by submarine volcanic exhalative activity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00199808
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