Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1006
AuthorsMcCue, K.* 
Van Dissen, R.* 
Gibson, G.* 
Jensen, V.* 
Boreham, B.* 
TitleThe Lake Edgar Fault: an active fault in Southwestern Tasmania, Australia, with repeated displacement in the Quaternary
Issue Date2003
Series/Report no.46 (5)
URIhttp://hdl.handle.net/2122/1006
Keywordsrecent faults
Australia
intraplate seismicity
multiple ruptures
Subject Classification04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution 
AbstractThe Lake Edgar Fault in Western Tasmania, Australia is marked by a prominent fault scarp and is a recently reactivated fault initially of Cambrian age. The scarp has a northerly trend and passes through the western abutment of the Edgar Dam, a saddle dam on Lake Pedder. The active fault segment displaces geologically young river and glacial deposits. It is 29 ± 4 km long, and dips to the west. Movement on the fault has ruptured the ground surface at least twice within the Quaternary and possibly the last ca. 25 000 years; the most recent rupture has occurred since the last glaciation (within the last ca. 10000 years). This is the only known case of surface faulting in Australia with evidence for repeated ruptures in the Late Pleistocene. Along its central portion the two most recent surface-faulting earthquakes have resulted in about 2.5 m of vertical displacement each (western side up). The Lake Edgar Fault is considered capable of generating earthquakes in the order of magnitude 61/2-71/4. The Gell River Fault is another fault nearby that was apparently also active in the Late Pleistocene. It has yet to be studied in detail but the scarp appears to be more degraded and therefore older than the most recent movement on the Lake Edgar Fault.
Appears in Collections:Annals of Geophysics

Files in This Item:
File Description SizeFormat 
1107_1118McCue.pdf373.6 kBAdobe PDFView/Open
Show full item record

Page view(s)

65
Last Week
0
Last month
0
checked on Jul 24, 2017

Download(s)

768
checked on Jul 24, 2017

Google ScholarTM

Check