Hi Doug, The Source Parameter Imaging function is found within the Grav/Mag Interpretation<http://www.geosoft.com/media/uploads/resources/brochures/OM_GM_fs_2009_10_web.pdf> extension. Here is also a technical paper from Geophysical Prospecting with more information about the SPI method for depth estimates.
http://www.geosoft.com/media/uploads/resources/technical-papers/ispi.pdf Lorraine Lorraine Godwin Regional Business Director, North America | Geosoft geosoft.com<http://www.geosoft.com/> | blog<http://blogs.geosoft.com/> | twitter<http://twitter.com/geosoft> | linkedIn<http://www.linkedin.com/company/geosoft-inc.> | facebook<http://www.facebook.com/GeosoftInc> | T +1 416.369.0111 | M +1 416.317.7246 44% of explorers responded that, “data management is of critical importance”. Download the 2013 Exploration Information Management Survey<http://www.geosoft.com/exploration-information-management/surveys/eims-survey-2013> From: Doug Perkin <[email protected]> [mailto:[email protected]] Sent: May-06-15 12:26 PM To: Geosoft Oasis montaj and Target Subject: Re: [geonet] Depth to source methods Hi Solomon Is there a GX for using the SPI method? I don't think I have that extension in geosoft. On Fri, May 1, 2015 at 9:45 AM, solomonjanjaro <[email protected]<mailto:[email protected]>> <[email protected]<mailto:[email protected]>> wrote: Try source parameter imaging Solomon Nehemiah Yusuf PhD student On 1 May 2015 17:27, "Doug Perkin <[email protected]<mailto:lt%[email protected]>>" <[email protected]<mailto:[email protected]>> wrote: Hi I have been trying various source depth estimation methods for grids of potential field data and wanted to start a discussion on which methods tend to provide better solutions for gravity vs aeromag. I am usually interested in sub vertical or dipping contacts, so for magnetics I have tried a structural index of 0 or 1 and for Gravity I have tried 0 and -1 using the USGS special function depth analysis GX. I have also tried Euler with various window sizes. The local wavenumber method using the USGS GX was interesting because it actually provides estimates of the structural index for various anomalies; however that method tended to give a lot more noise and was in places giving me a structural index of 3 when the RTP grid clearly did not look like a magnetic dipole source. Does anyone have experience with these depth estimation methods? Which methods tend to give more reliable solutions for a vertical or dipping contact using aeromag? And which methods tend to provide better solutions for a vertical or dipping contact using gravity? Any advice or discussion on these methods would be much appreciated Regards, Doug --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?forum=geonet<http://lyris.geosoft.com/read/?fourm=geonet> You are currently subscribed to geonet as: [email protected]<mailto:[email protected]>. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community/forums/register/ --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?forum=geonet<http://lyris.geosoft.com/read/?fourm=geonet> You are currently subscribed to geonet as: [email protected]<mailto:[email protected]>. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community/forums/register/ --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?forum=geonet<http://lyris.geosoft.com/read/?fourm=geonet> You are currently subscribed to geonet as: [email protected]<mailto:[email protected]>. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community/forums/register/ --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?forum=geonet You are currently subscribed to geonet as: [email protected]. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community/forums/register/
