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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  29-May-15 by Karl A. Flower(KAF)

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NMI
Name PACIFIC MINES, BRETT, HOPE GOLD MINES, DUNDEE, DUNWELL, LEBRED, RENO, FIFTEENMILE Mining Division New Westminster
BCGS Map 092H044
Status Showing NTS Map 092H06W
Latitude 49º 28' 34" N UTM 10 (NAD 83)
Longitude 121º 16' 10" W Northing 5481824
Easting 625363
Commodities Gold, Silver Deposit Types I01 : Au-quartz veins
Tectonic Belt Coast Crystalline Terrane Bridge River
Capsule Geology

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.

Bibliography
EMPR AR 1929-238,239; 1930-205; 1933-177; 1936-F61
EMPR ASS RPT 5770
EMPR FIELDWORK 1982, pp. 62-84
EMPR OF 1986-1
EMPR PF (Special Report by B.T. O'Grady, 1936 - Brett Gold Mines Ltd.)
GSC MAP 12-1969
GSC MEM 139
GSC P 69-47
GSC SUM RPT 1929A
Falconbridge File

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