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Pyroclastic Rocks

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Pyroclastic Rocks 

clastic rocks formed by the accumulation of clastic material (volcanic breccias, tuffs) expelled during volcanic eruptions. Pyroclastic rocks also include deposits formed when mudflows accompanying volcanic eruptions harden. After deposition, pyroclastic rocks either sinter, as is the case with ignimbrite, or undergo diagenesis.
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12 Pb-Zn deposits (New Brunswick), the presence of peperites in association with pyroclastic rocks and tufflavas indicates the in situ emplacement of pyroclastic rocks (cf.
Igneous rock associations 6. modelling of deep submarine pyroclastic ... by Lentz, D.R. / Geoscience Canada
In addition, auriferous multi-phase sulfide and oxide breccia veins are: 1) possibly underlain by one or more gold-copper porphyry systems (South Zone, Fall Creek Zones); 2) VMS type targets associated with sulfidized felsic stratigraphy and coarse pyroclastic rocks (Yellow Bowl, Knob Zones); and 3) a large epithermal target characterized by barite and jasper (possibly underlain by a gold-copper porphyry system.
Goldeye Options Todd Creek Property, Stewart Gold Camp, NW BC by Business Wire
GEOLOGY The Reyna de Oro deposit is predominantly stratigraphically controlled and is hosted by intercalated lithic pyroclastic rocks, andesite flow breccia and felsic tuff.
EXMIN Resources Inc.-Phase II Drill Program Hits High-Grade Gold and ... by Business Wire
 
 
 
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