Dear Colleagues: The following may be of interest for those of you able to attend the upcoming ASEG conference in February.
Ken Witherly ------------ RECENT ADVANCES IN AUTOMATIC DEPTH METHODS FROM POTENTIAL FIELDS ASEG 2003 � Intrepid Geophysics, Workshop 12, Sunday, 16th February 2003 Visit http://www.aseg.org.au/conference/Adelaide/reg.htm , go to Workshops, then Minerals Short Courses. Your chance to get up close and personal with world leading authorities and apply the lessons to your own data. 1. Evaluation of the Extended Euler Deconvolution technique � Misac Nabighian The 2D Extended Euler Deconvolution (EED) technique proposed by Mushayandebvu et al. (1999) was extended to 3D (Nabighian and Hansen, 2001) and applied to a number of field data sets with magnetic anomalies from both deep and shallow sources. The 3D extension allows calculations both with an a priori given structural index (SI) as well as with a SI determined independently by the program along with the location parameters. The derived results show that the EED technique yields results that are more stable and have a smaller RMS error than the results obtained using the standard Euler deconvolution (SED) technique. A variant of EED, using only the two equations derived by Hilbert transforming the standard Euler equation, not only allows the calculation of SI independently but also yields solutions that are more continuous spatially than those obtained otherwise. The results obtained so far seem to indicate that, independent of the technique used, the majority of valid solutions require SI values between 0 and 1. Finally, it is shown that the extension to 3D of the EED technique leads also to a generalization to 3D of the Werner Deconvolution technique and provides a unification of the two depth estimation schemes. 2. Recommended Guidelines for use of Euler, Common Pitfalls � Alan Reid Alan is considered the "Father" of the use of Euler in potential field geophysics. This gives him a unique position in witnessing practical approaches to the use and abuse of Euler. There are many misconceptions and the workshop will present an opportunity for you to update your knowledge and skills. Practical exploring guidelines are offered eg use of Euler when exploring for diamonds. 3. Practical, Fast & Efficient use of Geophysical Super grids to produce Structural Interpretations � Desmond FitzGerald The workshop will allow you to produce shallow to deep lineament populations with depth & signal strength, structural index on either Gawler Craton or Lachlan Fold belt. New generation solutions that are optimized for performance allow very detailed analysis of large areas in semi- real time. A combination of Euler, Horizontal derivatives, continuation, edge picking and strike populations is used. If time permits, you may generate these on your own datasets. 4. Creating & Visualizing 3-D Geology models � Peter Milligan Putting depths & throws on all your basement faults. Peter will cover the issue of rapidily creating interpretations for large regions. Integration of inversion techniques, explicit depth solvers like Euler, Naudy & use of worms & balloon diagrams. Visualizers from IDL, VRML and Go-CAD Bring your own laptop and gridded data. Workshop will include a demonstration copy of the tools. Register on-line at http://www.aseg.org.au/conference/Adelaide/reg.htm or by email at [EMAIL PROTECTED] . HURRY, while there are still places left. Must be finalized by early January! _______________________________________________________ List archive: http://www.mail-archive.com/[email protected]
