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mylonite |
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mylonite [′mī·lə‚nīt] (petrology) A hard, coherent, often glassy-looking rock that has suffered extreme mechanical deformation and granulation but has remained chemically unaltered; appearance is flinty, banded, or streaked, but the nature of the parent rock is easily recognized. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The SZD has been traced over a 1 km strike length and remains open under the glacial-fluvial deposits of the Todd Creek Valley towards the Knob Zone, 4 km to the north; and, towards the Mylonite Zone, 3 km to the south. Old pits and trenches were mapped along a 300 m length and a series of vein grab samples were taken that often contained chalcopyrite (copper), galena(lead) within a reddish-brown mylonite (shear) and gave the following distribution of values. The rocks vary from siliceous mylonite (05FLDDH-01) to rocks that have cm-scale alternating laminae of quartz-rich and biotite-rich domains. |
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