The investigations done by the Instituto de Investigaciones Geológicas (former Geological Survey of Chile) and the Department of Geosciences of the University of Concepción during the last 10 years have shown that in the Coastal Range of south-central Chile, between 38° and 42° south latitude, there are ore occurrences related with a structurally dismembered ophiolitic complex assigned to the Paleozoic (Frutos and Alfaro 1985, 1987) (Fig. 1). Within this ophiolite suite, there are polymetallic massive sulfides interbedded with metabasites (“greenschists”) (Alfaro 1982, 1985 a, b, 1986; Alfaro and Frutos 1988; Collao and Alfaro 1982, this Vol.; Alfaro et al. 1983; Frutos and Alfaro 1985, 1987), which have been interpreted as volcanic-exhalative depositions formed on the oceanic bottom during the Paleozoic. These ore occurrences are genetically similar to the Besshi-type deposits of Japan, characterized by their spatial relationship with tholeiitic volcanic and volcaniclastic rocks.
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- Massive Sulfides in the Greenstone Belt of South-Central Chile
- Springer Berlin Heidelberg