Figure 5. EagleEye structural geology of Magnetics inversion closer area showing expected drill hole lithologies and structures.

Structural enhancement by the EagleEye system of a magnetics plan and section. Bob Watchorn 10/02/24 ©

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Objective.

To show that usable structural geology can be obtained from basic geophysical plans and sections and that they can be of great use in planning costly diamond exploration drill-holes.

The following plan and section appeared in an ASX announcement and did not show any geology.

Good structural geology is the best criteria to use for exploration targeting. Currently structural geology can not be obtained from these geophysical plans and sections.

Methodology.

The EagleEye pattern recognition system was used to analyse the geophysical images.

My EagleEye pattern recognition system obtained the following structural geology of the plan and section. Drilling will soon determine whether the structures shown by EagleEye are real – or not. I await the drilling results with anticipation.

Figure 1. Magnetics anomaly.
Figure 1. Magnetics anomaly of project area.
Figure 2 Magnetics anomaly EagleEye structural geology.
Figure 2. Magnetics anomaly, EagleEye structural geology.

This plan shows structural geology. WNW, ENE, NNE, and NNW faults. There is a fragmented area within and surrounding the Magnetics anomaly suggesting much more brittle lithologies.

There is also a large fragmented area to the SW of the magnetic anomaly which has the appearance of another, lower magnetic, intrusive with brittle, crosscutting NNW and ENE structures? Thus, there are multiple large intrusives in the area which may be mineralised and explored.

Figure 3. Magnetics inversion section through Magnetics anomaly
Figure 3. Magnetics inversion section through Magnetics anomaly.

 

Figure 4. EagleEye structural geology of Magnetics inversion larger area showing expected drill hole lithologies and structures.
Figure 4. EagleEye structural geology of Magnetics inversion larger area showing expected drill hole lithologies and structures to 1,500 metres depth..

Deformation episodes??

There is a flat, west dipping  ‘colour change’ system which transects the structures which may relate to early regional thrusting?? (D1?)

A major steep, east dipping, fault is located to the east of the anomaly. There are a series of flat arcuate east dipping faults that are older than the steep faults. They bend as they cross the magnetic anomaly suggesting they are coeval. (D2-3?)

The geology shows more linear steep east and west dipping faults which have the appearance of the last major deformation. (D4?)

The next section is enlarged area from within the yellow box.

Figure 5. EagleEye structural geology of Magnetics inversion closer area showing expected drill hole lithologies and structures.
Figure 5. EagleEye structural geology of Magnetics inversion closer area showing expected drill hole lithologies and structures to 1,000 metres depth.

0 – 150 Sediments steep E and W dipping faults. Strong flat E dipping shears from 100 to base of section.

150 – 450m Gradually increasing alteration as a domal convection cell on top of the high magnetics intrusive. This alteration is 200m in extent and appears to accompany the steep E and W faults. (D4?)

450 – deeper than 1300m. High magnetics intrusive D4?

The HACKLY areas are areas of more intense alteration. This follows domal areas in the intrusive and mainly subvertical and W dipping shears above the intrusive. They appear to destroy the steep structures. (D4+ D5? mineralisation event??)

Figure 6. EagleEye structural geology of Magnetics inversion closest area showing expected drill hole lithologies and structures to 600 metres depth.
Figure 6. EagleEye structural geology of Magnetics inversion closest area showing expected drill hole lithologies and structures to 600 metres depth.

0 – 150 Sediments steep E and W dipping faults. Strong flat E dipping shear at 100m.

150 – 450m Gradually increasing alteration as a domal convection cell on top of the high magnetics intrusive. This alteration is 200m in extent.

450 – deeper than 1300m. High magnetics intrusive.

Summary

Good structural geology was obtained and its validity will be comparing these structures and proposed lithologies, with the actual geology as the hole is drilled.  It would be instructive to compare the known geology of the area with my findings.

Cheers

Bob Watchorn

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