Pyhasalmi

Overview

Massive, banded, dissemination, lens, 0.08 km thickness. 1909 +/- 27 Ma (Pb-Pb for ore galena). Remobilization of mineralization into fractures. Disseminated ore shows breccia structure, interpreted as stringer zone. 37% S, 4.9% BaO. Calc-alkaline, mature island arc. Low K rhyolite.

Geological Context

Tectonic Setting: Bimodal-felsic in epicontinental arc

Resources & Operations

Operator: 0

Production Start: 1962

Data Provenance

Source: USGS MRDS