Geochron Inversion of Magnetotelluric data
Abstract
A new constrained inversion scheme is proposed whereby model smoothness is evaluated in a time stratigraphic approach. In a standard inversion scheme, the model space is parameterized such that the three dimensions represent spatial dimensions. In time stratigraphy, or more specifically within its mathematical formulation termed the Geo-Chronological (aka GeoChron) space, the model consists of two horizontal dimension coupled with a vertical time dimension. In Geochron space, the model is constrained such that units are smooth in the horizontal directions at the time of their deposition if subsequent tectonic movement is removed. We have modified Occam 2d to work in Geochron space and present tests using 1) synthetic magnetotelluric data from a range of simple test scenarios and and 2) real data collected in sedimentary basin in northern Canada. The results are promising and provide a new framework to guide the incorporation of stratigraphic data into an inversion.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFMGP51A1374C
- Keywords:
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- 0644 Numerical methods;
- ELECTROMAGNETICSDE: 1515 Geomagnetic induction;
- GEOMAGNETISM AND PALEOMAGNETISMDE: 3006 Marine electromagnetics;
- MARINE GEOLOGY AND GEOPHYSICSDE: 3914 Electrical properties;
- MINERAL PHYSICS