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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  06-Aug-1996 by Jay W. Page (JWP)

Summary Help Help

NMI
Name LAURA, PLATINUM BLONDE, FRANKLIN CAMP Mining Division Greenwood
BCGS Map 082E059
Status Showing NTS Map 082E09W
Latitude 049º 33' 32'' UTM 11 (NAD 83)
Longitude 118º 22' 36'' Northing 5490498
Easting 400440
Commodities Silver, Gold, Lead, Zinc Deposit Types H05 : Epithermal Au-Ag: low sulphidation
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Overlap Assemblage, Harper Ranch
Capsule Geology

The LAURA showing is located on Mount Franklin, approximately 550 metres southwest of the summit.

The showing consists of silver-rich mineralization exposed in several trenches located several hundred metres south of the HOMESTAKE (082ENE051) showing. The mineralization is carried by quartz veins which cut andesite and dacite of the Eocene Marron Formation, Penticton Group. These volcanic rocks unconformably overlay metasedimentary rocks of the Devonian-Triassic Harper Ranch Group. Granodiorite of an unnamed Middle Jurassic intrusion is found several kilometres to the south.

The origin of the trenches at the LAURA showing is unknown, but they were likely prospected by Longreach Resources Ltd. who carried out an extensive exploration program over this area in 1987. In 1988, Placer Dome Inc. optioned this property, known as the PLATINUM BLONDE, from Longreach Resources. Placer carried out surface sampling of the LAURA trench and diamond drilled 3 holes under the mineralized exposures. A grab sample assayed 56 grams per tonne silver, 0.14 gram per tonne gold, 0.0267 per cent zinc and 0.017 per cent lead; some grab samples assayed as high as 141 grams per tonne silver (Assessment Report 17273).

The drillholes, collared in Marron Group andesite, intersected andesitic and dacitic volcanic breccia and then an intermixed succession of cherts, shales, sandstones and pebble conglomerates. The sediments are deformed and contain zones of brecciation of variable intensity. The breccias are best developed in sections of cherty sediment. The intense silicification observed in the overlying trenches was not seen in drill core. Fractures are filled with calcite. Drillhole PDI 87-34 intersected a dacitic breccia, with some tuffaceous content, cemented by calcite. A 1.65-metre section (33.07 to 34.72 metres), which contained 5 per cent pyrite and a minor amount of galena, assayed 25 grams per tonne silver, 0.1 gram per tonne gold and 0.139 per cent arsenic (Assessment Report 17273). Chlorite is noted as vein selvages and 1 per cent clay alteration is present.

Bibliography
EMPR ASS RPT 15172, 15746, 15964, 15981, *17273
EMPR EXPL 1987-C32; 1988-C22
EMPR OF 1994-8
EMPR PF (See General PF - Franklin Mining Camp File; See PF 082ENE002 - Platinum Blonde Property, News Clippings, 1986-87)
EMPR RGS 29
GSC MAP 97A; 133A; 6-1957; 1701A; 1712A; 1713A; 1714A; 1736A
GSC MEM 56
GSC OF 409; 736; 1969
Placer Dome File

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