Physical character of faults
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Transcript of Physical character of faults
GLG310 Structural Geology
Physical character of faults
April 22, 2023 GLG310 Structural Geology http://geolmag.geoscienceworld.org/content/145/3/435/F3.expansion
http://www.photoree.com/photos/permalink/891384-19756080@N00
http://www.gm.univ-montp2.fr/spip/spip.php?article761
Fault surfaces
April 22, 2023 GLG310 Structural Geology
http://homepage.usask.ca/~mjr347/prog/geoe118/geoe118.052.html
Physical character of faults
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http://homepage.usask.ca/~mjr347/prog/geoe118/geoe118.052.html
Breccia
Photomicrograph of fault breccia in the Antietam Formation, Blue Ridge province. Breccias form when rocks are extensively fractured in fault zones and are cemented together when minerals precipitate in the cracks and fractures. Note the angular fragments (fr) of quartz sandstone in a matrix of fine-grained iron oxide cement (ic). Field of View 4 x 2.7 mm, Cross Polarized Light.
http://web.wm.edu/geology/virginia/provinces/Blueridge/fault_zone_lithology.html
Woodcock and Mort, 2008
April 22, 2023http://www.webpages.uidaho.edu/~simkat/geol345_files/2012lecture9.html
April 22, 2023 GLG310 Structural Geologyhttp://www.carmeliet.arch.ethz.ch/People/Ferdowsi
Gouge along fault zone is more easily eroded
April 22, 2023 GLG310 Structural Geology
SAFOD: hole and core
April 22, 2023 GLG310 Structural Geology
http://www.gm.univ-montp2.fr/spip/spip.php?article761
The word "pseudotachylite" was coined early in the 1900s to name a peculiar glassy rock that looks sort of like tachylite but isn't. Tachylite ("TAK-a-lite") is a basaltic glass
A psuedotachylite is a frictionally generated melt rock
April 22, 2023 GLG310 Structural Geology
http://www4.nau.edu/meteorite/meteorite/book-glossaryp.html
A psuedotachylite is a frictionally generated melt rock--formed by fault slip, but also impacts
April 22, 2023 GLG310 Structural Geologyhttp://maps.unomaha.edu/maher/GEOL3300/week10/dsz.html
Mylonite is a rock formed during shear with ductile mineral behavior (quartz), grainsize reduction (feldspar), and some grain growth
April 22, 2023 GLG310 Structural Geology
http://en.wikipedia.org/wiki/Mylonite http://upload.wikimedia.org/wikipedia/commons/1/1e/Mylonite_Strona.jpg
http://upload.wikimedia.org/wikipedia/commons/c/cd/Ska%C5%82a_zmyllonityzowana.jpg