The structural geology of the Thor deposit has become increasing important, and in 2019 Taranis geologists examined this in detail. The deposit is complexly folded, and is transected by a major fault zone that hosts mineralization that crosscuts the folds and dips moderately to the east-northeast. This fault hosts all of the known mineralization at Thor. The primary bedding (S0), major folds (F1) and the fault zone (V1) are discussed below in detail.
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Bedding (S0)
1,072 bedding surface measurements were taken at Thor within the Broadview Creek, Jowett and Sharon Creek Formations. This data was then plotted as poles to bedding on the figure to the left and show that there is only one phase of folding. The stereonet shows that the bedding is folded around an axis that trends northwesterly, and it is calculated to strike 310.5 degrees and plunges to the northwest at 49.7 degrees. The axial plane is calculated at 305.1 degrees and it deeps steeply to the northeast with a dip of 85.4 degrees. |
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Plunge of Folds (F1)
The plunge of the folds was also measured in the field, and this shows a very close resemblance to the the calculated fold plunge from the bedding planes (right figure), This data shows a very tight cluster that is in the expected position based on the S0 surfaces. One of the interesting features is a small cluster of points plunging to the southeast that is normal to the main cluster of points. |
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Top of Vein (V1)
Typically, the top of the mineralized zones at Thor is encountered in drill holes, but there are several places where it is exposed at surface, particularly the Scab Zone. A total of 171 locations were measured in a wide variety of areas at Thor, and the stereonet for the poles to this surface is shown to the left The following conclusions can be made:
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