I-1 Intrusive Related Rocks

TEM image of drill core from Z-900/1300 target intersected in drill hole Thor-247, 357m depth (Colorado School of Mines)

TEM has proven to be invaluable in the identification of the mineralogy of this rock unit, as the fine-grained nature of the minerals in the rock precluded the identification of the mienrals in the field.

The rock is composed primarily of albite, ankerite, kaolinite and quartz. The presence of albite in these rocks is very important because much the same as the I-2 dykes, it indicates origin from a sodium-rich intrusive body. The kaolinite found in this rock unit also is indicative of argillic alteration. The Z-900/1300 target does not outcrop at surface, and based on geophysical survey lies directly on top of the I-1 intrusive body.

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