Overview of Results from the Greenstone ... - Geology Ontario

Recommendations
• Further testing of metamorphic tools for gold exploration should be done by increasing the density of
data in and around metamorphic anomalies that are associated with known gold deposits and by
exploring metamorphic anomalies in areas where gold mines have not yet been found (e.g., 20 km
north and 10 km south of Timmins; Pipestone fault).
• The low density of metamorphic data in the northwest, south-central, and northeast sectors of the
metamorphic map should be improved and metamorphic mapping extended to the north and
southwest in Ontario and eastward into Quebec.
• More comprehensive analysis and interpretation of the spatial relationships between the intensity of
strain, type and intensity of hydrothermal alteration and metamorphic zone boundaries should be
done.
Figure 30. Depth–time diagram illustrating history of 2 hypothetical samples (Tisdale basalt or greenstone, Timiskaming
conglomerate or metaconglomerate) with respect to a simple three-stage model of the tectonic evolution of part of the western
Abitibi greenstone belt (from Thompson 2005, p.23). Geochronology after Ayer et al. (this report), Ayer, Barr et al. (2003),
Hanes et al. (1989) and Schandl et al. (1991).
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