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tectonic breccia

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tectonic breccia [tek′tän·ik ′brech·ə]
(petrology)
A breccia developed from brittle rocks, formed as a result of crustal movements and produced by lateral or vertical pressure. Also known as dynamic breccia; pressure breccia.


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The holes did not intersect significant sulphide mineralization, however extensive tectonic breccia and carbonate-epidote alteration with some minor veining are noted indicating proximity to or within the trace of the Strike Lake Fault structure.
In the Discovery Zone these soft, "sandy" zones extend beneath an enigmatic tectonic breccia unit, which contains anomalous gold and angular fragments of jasper in a clay matrix, with widespread iron oxide.
Gold mineralization is hosted by tectonic breccia zones up to 5m wide cutting tuffs and ignimbrites.
 
 
 
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