Summary

Deposit type

• Carlin-type
• Breccia pipe / Stockwork
• Hydrothermal

Summary:

The mineral deposits along the Carlin Trend form a suite of deposits known as Carlin type deposits.

Carlin mineral systems are a unique class of epigenetic ore deposits with enigmatic origins. They are unique due to the size and scale of deposits that formed exclusively within NE Nevada during the middle-Eocene period (42-35 Ma), establishing this area as a world-class gold complex. Carlin mineral systems are enigmatic due to their unknown, distal source of gold, as well as deposit characteristics and hydrothermal conditions that culminate to being atypical of most documented mineral systems.

Tri-Star (Silverstar and Goldstar)
The gold deposits at the Tri-Star complex (formerly Genesis) are developed along the Tuscarora, Turquoise, and Ridge anticlines within the Lynn Window. They occur over an area of about 3.2 kilometres long by 1.9 kilometres wide. The Silverstar deposit occurs in the hinge of the Tuscarora anticline whereas the Bluestar Point, Bobstar, Goldstar, and Payraise deposits occur on the more western anticlines. The anticlines are intruded in the north by the 158 Ma Goldstrike intrusion, a thick composite diorite–granodiorite sill complex.

Five major lithologic units are recognized in the Tri-Star deposit from surface mapping and drill hole logging: Tertiary Carlin, Devonian Rodeo Creek, Devonian Popovich, Silurian Roberts Mountains, and Ordovician Hanson Creek Formations.

Goldstar deposit
Goldstar is a Project, which has Mineral Resources. Goldstar, and adjacent deposits that were historically mined, are located south of the Goldstrike stock sharing similar geological controls to mineralization as Goldstrike deposits.

Mineralization is preferentially hosted in the Wispy sub-unit of the Popovich Formation and in breccia along upper Roberts Mountain sub-unit contacts. The highestgrade gold mineralization is hosted within the Tuscarora anticline axial plane extending into the overturn east limb. This zone of the Roberts Mountain Formation is significantly jointed and intensely sicilfied at the contact with the Popovich Formation. Localized mineralization also concentrates at the structural intersection of the Wispy sub-unit with high-angle structures that are variably infilled with pre-mineral, undifferentiated dikes.

The dimensions and orientations of the modelled mineralized domains for Goldstar deposit:
Length - 840 – 1,420 m
Width - 250 – 510 m
True Thickness - 60 – 390 m
Approximate Strike Direction - NNW.

Mining Methods

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Comminution

Crushers and Mills

Processing

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Commodity Production

Personnel

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