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File Created: 03-Apr-1990 by Robert G. Gaba (RGG)
Last Edit:  14-Nov-2024 by Del Ferguson (DF)

Summary Help Help

NMI
Name LISA DAWN, HOL Mining Division Lillooet
BCGS Map 092J089
Status Prospect NTS Map 092J16W
Latitude 050º 51' 49'' UTM 10 (NAD 83)
Longitude 122º 20' 14'' Northing 5634867
Easting 546643
Commodities Molybdenum Deposit Types
Tectonic Belt Coast Crystalline Terrane Bridge River, Methow
Capsule Geology

The LISA DAWN molybdenum prospect is exposed on the hillside southeast of Holbrook Lake at the headwaters of Holbrook Creek in the southern Shulaps Range, approximately 34 kilometres northwest of Lillooet, B.C.

The prospect is approximately 100 metres uphill from a narrow road along the southeast shore of the small pond. The Lisa Dawn prospect consists of a molybdenite-bearing quartz vein at the contact between plagioclase-porphyritic dacite (Tertiary Rexmount Porphyry) and quartz-flooded and chloritic altered granodiorite (Eocene Mission Ridge pluton).

The attitude of the vein is approximately 310 degrees with a 50 degrees east dip. It is approximately 1.5 to 2.0 metres thick and is exposed on the hillside for approximately 20 metres. The vein is mostly massive milky white quartz, slightly rusty and contains minor chloritic partings. A 10-centimetre thickness of vein material adjacent to granodiorite contains stylolitic veinlets and pods of molybdenite up to 2 millimetres by 5 centimetres in size; a yellow earthy alteration (probably ferrimolybdite after molybdenite) is locally abundant in vuggy quartz and along fractures. The vein also contains anomalous copper and gold values. Silicic granodiorite adjacent to the vein contains disseminated flakes of molybdenite; the extent of this mineralization is not known.

In 1987 an airborne magnetometer and VLF-EM survey was conducted by a consortium of tenure holders, including owner J. Posnikoff, with a follow-up Induced Polarization (IP) survey completed in 1989. MacNeill International Industries Inc. conducted a small soil sampling survey in 1991, with two samples showing anomalous gold values. In 1992 and 1993, Spokane Resources Ltd. conducted several soil surveys, resulting in two arsenic anomalies.

In 2011 and 2012, Miocene Metals Ltd. conducted rock, silt and soil sampling on their Shulaps property, which surrounds the Cub and Lisa Dawn occurrences (Assessment Report 32452, 33353). The programs confirmed the presence of structurally-controlled polymetallic fractures hosted in up to 1 metre wide bull quartz veins along the La Rochelle structural trend. This structural trend extends 7 kilometres northwest from La Rochelle, including the Alpine, Cub, Lisa Dawn mineral occurrences, the Rex (Zeus) deposit, and potentially further north to the Shulaps showing.

Bibliography
EMPR EXPL 1983-325; 1987-C216
EMPR FIELDWORK 1974, p. 35; 1985, pp. 303-310; 1986, pp. 23-29; 1987,
pp. 93-130; 1988, pp. 105-152; 1989, pp. 45-72; 1990, pp. 75-83
EMPR OF 1987-11; 1988-3; 1989-4; 1990-10
EMPR PFD 802125
GSC P 77-2, p. 16
McDonough, B. (2010-12-31): Technical Report on the Cu-Au-Mo Properties
McDonough, B. (2011-04-02): Technical Report on the Cu-Au-Mo Properties

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