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Foundation · Layer 01 of 11

Host Rocks.The foundation of the
Thor mineral system.

The Broadview and Sharon Creek formations preserve the sedimentary layers, deformation and alteration that help explain Thor’s geological setting.

Read the rock record All 11 layers
Formations
Broadview & Sharon Creek
Principal rocks
Greywackes & pelites
Geological age
Lower Paleozoic

01 · The rock record

A landscape written
in layers.

Host rocks surround a mineral deposit. At Thor, they are metamorphosed sedimentary rocks, with minor volcaniclastic material, originally deposited in a basin along western North America.

Field evidence · Bedding

Read the bands.

Changes in colour, grain size and composition record shifting depositional conditions.

Field evidence · Alteration

A darker signature.

Carbonaceous alteration commonly gives Thor’s host rocks their distinctive black appearance.

Host rock thin section. Original scale bar: 1,000 μm (1 mm).

02 · Folding & structure

Small-scale folds.
A district-scale pattern.

Tight, asymmetric folding is visible in thin section. Across Thor, folds trend northwest along the Silver Cup Anticline, with shearing commonly concentrated on their limbs.

~35°Northwesterly fold plunge
Reported structural orientation

This shallow plunge helps geologists follow the folded framework into the subsurface.

Explore the Silver Cup Anticline

Continue the atlas · Layer 02 of 11

Silver Cup Anticline.

From the rocks themselves to the structure that connects them.

Explore the next layer Back to Thor in 3D

Host rock evidence

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