OCTek Seismic - Westralia


OCTek Seismic
Westralia

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The OCTek Seismic Westralia study has investigated the crustal structure of the NW Shelf of Australia, based on a quantitative analysis of the ION Geophysical WestraliaSPAN seismic survey. A full description of the seismic survey can be found here


The WestraliaSPAN survey covers several geological/geographical areas of the NW Shelf, including (from S to N):
The Exmouth Plateau / Carnarvon Basin
The Roebuck / Canning Basins
The Browse Basin
The Bonaparte / Vulcan / Petrel Basins


The quantitative analysis is based on the ION interpretation of the survey, a summary of which has been published here

The primary output from OCTek Seismic Westralia is a line-by-line analysis of the survey, captured in illustrative montages of the profiles showing:
1 Moho depth and crustal-basement thickness, including display of this information on the PSDM and PSTM seismic sections (see below)
2 Crustal structure across the Ocean-Continent-Transition and the location of the Continent-Ocean-Boundary
3 The predicted distribution of volcanic rocks within the OCT
4 Crustal thinning-factor and beta-factor, for (i) the full geological history of the NW Shelf, (ii) the older pre-Jurassic history (350-200Ma), and (iii) the Jurassic-and-younger history (200Ma-present). This is complemented by a guide on how to convert the results of this analysis into estimates of basement heat-flow history


Geo-referenced digital results for each seismic line are also provided, together with a selection of 3D digital grids compiling the results (see above).


If you have an interest in the WestraliaSPAN seismic survey, or an interest in the Austalian NW Shelf in general, we invite you to contact us for further information


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