The Chatree gold-silver bearing epithermal deposit is located on the boundary between Pichit and Petchabun Provinces, north-central Thailand. The deposit lies within the Loei-Petchabun volcanic belt of Permo-Triassic age.

Gold-silver mineralization occurs as a low sulphidation quartz-carbonate-adularia style epithermal, occurring in shallow to steeply dipping structures carrying gold-silver bearing veins, breccias and stockworks, within a 7.5 by 2.5 kilometre zone of silicified latitic and tracytic volcanic fragmentals and flows. The system is aligned in a NNW direction and is enclosed by two large overlapping interpreted caldera structures. In the deposit, gold occurs as native gold and electrum in silica, calcite and on the boundaries of, in fractures within and as blebs within pyrite. Electrum grains commonly have high gold cores with silver rich margin. Silver occurs as electrum, AgS and AgSe. Average silver/gold ratio in the deposit is 5:1. The associated 1-2% sulphides are represented 98% by pyrite with subordinate chalcopyrite, shpalerite and galena in decreasing amounts.

The resources position at Chatree to April 1999 is estimated at 12.6 million tonnes at 2.5 g/t Au containing 1,004,000 ounces of gold. The estimated mineable resources was 9.6 million tonnes at 2.7 g/t Au containing 825,000 ounces of gold.