The Pacific Mines occurrence is located on the south side of Fifteen Mile Creek, approximately 1 kilometre west of its mouth on the Coquihalla River.
The Coquihalla Serpentine Belt forms a narrow, elongate, north-northwest trending, steeply dipping unit separating supracrustal rocks of the Ladner Group to the east, from the Hozameen Complex in the west. Dark, highly sheared to massive serpentinite, of probable peridotite parentage, characterizes the belt.
The western contact is represented by a major fracture that appears to dip steeply east. This is termed the "West" Hozameen fault and the serpentinites in this vicinity contain highly sheared talcose rocks. The serpentinite has a complex association with diorite intrusions, which occur as dike-like bodies within the ultramafics. On the property, a 30 metre wide diorite dike crosscuts the serpentinite.
Workings consist of development along sheared fractures and talcose seams in the serpentinite, which strike northwest and dip generally to the southwest. Mineralization consists of native gold in the talcose serpentinite as well as some arsenopyrite. The main adit intersects a shear striking 310 degrees and dipping 75 degrees southwest.
In 1936, a selected sample of the slicken-sided serpentinite from approximately 18 tonnes of sorted ore assayed 16.45 grams per tonne gold and 3.43 grams per tonne silver. Samples from other shears yielded trace to 0.68 gram per tonne gold and trace to 6.85 grams per tonne silver (O'Grady, 1936).
In 1975, a ground magnetometer survey was completed on the area as the BD claims. Recently the area has been explored in conjunction with the Ladner Gold project. For a completed record of exploration in the area see the Ladner Creek (MINFILE 092HNW007) occurrence.