Hi Colleagues,
Above is my EagleEye structural geology ultra-enhancement of magnetics image from AirGeoX’s LinkedIn post of a week ago. The post showed various filters used to try and gain structural geology information from a 10m spacing mag survey. Below one can see a comparison between the filter method and my structural recognition program EagleEye method. I’m sure the two combined would work well too!
I have proved many times from my research all around the world that the EagleEye structures are real and can be reliably used for exploration targeting.
There are many papers and a brief description of how to use this method to gain detailed structural geology from fuzzy images on my website geotreks.com.au
This is the text from the AirGeoX post on LinkedIn (https://www.linkedin.com/feed/update/urn:li:activity:6864781768088801280/) describing their procedure using filters to get the above images for gaining structural geology data.
From AirGeoX post,
Does ground or drone magnetics identify higher resolution geological features?
You may automatically assume ground magnetics, but you may be wrong.
If there’s any variable weathering or maghemite present this produces high amplitude noise that obscures underlying geology.
The images below are were both collected with the same 10m line spacing in the same northerly orientation. The difference is that the drone data is flown at 15m altitude, which acts as a filter to remove all wavelengths less than 15m.
Enhancement filters, such as the 1VD shown don’t produce a coherent response with the ground magnetics where as enhancement filters applied to drone magnetics aids geological interpretation.
Thank you to Emmerson Resources for supplying the data.
If you would like to discuss the magnetic signature of maghemite in depth, please message Nick Direen of Mitre Geophysics.
Below is my EagleEye structural geology ultra-enhancement of magnetics image from AirGeoX’s LinkedIn post of a week ago.
These images show the difference between using filters and structure recognition programs for getting detailed geology from fuzzy images.
The figure top left inset has the original ground, 10 metre spacing, AirGeoX magnetic survey image.
The central top image is the EagleEye structurally enhanced image overlaid by the original AirGeoX image so that the magnetic colour values can be seen.
The top right image is the EagleEye structurally enhanced image. T.his image has strong edge effects and wet look applied which highlights the structurally complex areas.
The lower right image has horizontal derivate and low sunangle from 2 oclock. I have used a strong, wide setting for the structural thickness search function which highlights the strong linears and rings.
The lower left is a quick structural geology interpretation showing the linears and rings. There are two structural domains, strong WNW, ENE NNW and NNE linears as well as ring structures of various sizes. What these represent I’m sure the owners of the lease would love to find out. Do the ring structures represent porphyry intrusions???
Generally standard geophysical programs do not highlight these ring structures which are quite easily observed with structural recognition enhancement programs.
Happy hunting!
Bob
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