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File Created: 31-Oct-2011 by Sarah Meredith-Jones (SMJ)
Last Edit:  21-Sep-2012 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name LAIB CREEK, OMG, KOOTENAY GEMSTONE Mining Division Nelson
BCGS Map 082F036
Status Showing NTS Map 082F07W
Latitude 049º 20' 24'' UTM 11 (NAD 83)
Longitude 116º 52' 52'' Northing 5465260
Easting 508636
Commodities Beryl Deposit Types O : PEGMATITE
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The OMG claims are located on Laib Creek, approximately 7 kilometres west of its mouth with Kootenay Lake.

The area is underlain by granites and granodiorites of the middle Cretaceous Bayonne Batholith (Shaw Creek stock) and sediments of the La France Group. Pegmatites cut all rock types and host beryl crystals.

The claims were staked in 2002 and added to the Kootenay Gemstone property of Cream Minerals Ltd., in 2003. Exploration was continued on the property through 2005.

In 2002, a total of 50 beryl specimens were collected. The most abundant and largest beryl crystals were located on the OMG # 1 claim. Most beryl crystals are opaque and 10 per cent of the beryl crystals have gemmy sections. Most crystals are highly fractured. Beryl crystals range in size from a few millimetres to 30 centimetres long and 5 centimetres wide. Colours of gemmy beryl sections range from colourless to light green to sky blue (aquamarine). Some of the best quality aquamarines occur within or along the margin of quartz cores within surrounding coarse-grained pegmatite (Assessment Report 26966).

In 2003, two locations on the OMG and Cultus claims, to the south, were identified, containing 10 to 30 centimetre wide quartz veins that extend out of the quartz cores through the host coarse-grained pegmatite and into surrounding aplite and/or sedimentary rock types. These veins comprise 90 per cent light grey to smokey quartz with subordinate K-feldspar, trace beryl and molybdenite, and up to 5 per cent vugs, lined with rimes of very fine-grained micas and/or clays, and occasionally beryl crystals. Several gemmy ice-blue, translucent to transparent, euhedral aquamarine crystals, up to 6 millimetres in diameter, have been found in this vein type. Molybdenite occurs as sparse, yet coarse disseminations up to 1.5 centimetres. Smokey quartz is most prevalent in and around vuggy sections of the veins (Assessment Report 27478).

Bibliography
EMPR ASS RPT 26966, 27478, 27850
EMPR FIELDWORK 2003 pp.167-184
EMPR PFD 884664, 884665

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