
TY  - JOUR
A1  - Tassell, Hugh 
A1  - Goncharov, Alexey 
T1  - Geophysical evidence for a deep crustal root beneath the Yilgarn Craton and the Albany-Fraser Orogen
JF  - ASEG Extended Abstracts
JO  - ASEG Extended Abstracts
Y1  - 2006
VL  - 2006
IS  - 1
SP  - 1
EP  - 6
KW  - 
UR  - https://doi.org/10.1071/ASEG2006AB176 
N2  - Using a marine seismic reflection survey as a source for onshore and offshore seismic refraction recorders, high quality refraction data were recorded to a maximum offset of 400 km. A two-dimensional velocity model for Line 19 of Geoscience Australia survey 280 in the Bremer Sub-basin and its onshore extension was derived by forward modelling using iterative ray tracing. Our velocity model indicates the presence of a deep crustal root located under the southern margin of the Yilgarn Craton and the Albany-Fraser Orogen. Comparison of the gravity response derived from this model with the gravity profile extracted from regional grids shows reasonable correlation. However, fine tuning of the seismic model is required to better define the complex geometry of the crustal root. Deep crustal roots are common under Proterozoic mobile belts that surround Archaean cratons. However, these results also indicate the presence of a crustal root under the southern margin of the Yilgarn Craton. This is consistent with the view that Proterozoic taphrogenesis penetrated tens of kilometres into the Yilgarn Craton. 
ER  -

