
TY  - JOUR
A1  - Dentith, Mike 
A1  - Evans, Shane 
A1  - Ferguson, Ian 
A1  - Gallardo, Luis 
A1  - Joly, Aurore 
A1  - Cawood, Peter 
A1  - McCuaig, Cam 
A1  - Tyler, Ian 
T1  - Magnetotelluric Surveys Across Major Precambrian Tectonic Boundaries in Southern Western Australia
JF  - ASEG Extended Abstracts
JO  - ASEG Extended Abstracts
Y1  - 2010
VL  - 2010
IS  - 1
SP  - 1
EP  - 4
KW  - 
UR  - https://doi.org/10.1071/ASEG2010AB023 
N2  - Magnetotelluric data have been recorded along two traverses in southern Western Australia. The survey locations were chosen so as to define conductivity structure in the deep crust and upper mantle across fundamental geological boundaries within and at the margin of the Yilgarn Craton. Data across the suture zone between the Archean Yilgarn Craton and the adjacent Proterozoic Albany-Fraser Orogen suggest major structures and crustal blocks have been successfully mapped based on their conductivity characteristics. The data are interpreted as showing the orogen is largely allochthonous and the suture zone may contain remanent oceanic crust and suspect terranes of continental affinity. Preliminary results from a survey across the southern Yilgarn Craton from the Southern Cross to Eastern Goldfields greenstone terrains suggest major fault structures, such as the Koolyanobbing shear zone, extend in to the deep crust and dip to the east. A zone of anomalously conductive mantle occurs beneath the Lake Johnston greenstone belt. This belt contains nickel sulphide deposits but the origin and significance of the mantle feature and any link to the mineralisation remains equivocal. 
ER  -

