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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  07-Oct-2021 by George Owsiacki (GO)

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NMI 104N14 Mo1
Name GLADYS LAKE MOLY, PIP, DIP, SIP, ASPEN Mining Division Atlin
BCGS Map 104N085
Status Prospect NTS Map 104N14E
Latitude 059º 51' 53'' UTM 08 (NAD 83)
Longitude 133º 06' 00'' Northing 6637872
Easting 606400
Commodities Molybdenum, Copper, Tungsten Deposit Types L05 : Porphyry Mo (Low F- type)
Tectonic Belt Intermontane Terrane Cache Creek, Plutonic Rocks
Capsule Geology

The Gladys Lake Moly occurrence is located between Davenport and Chehalis creeks about 2 to 3 kilometres south of the west end of Gladys Lake. It is approximately 50 kilometres northeast of the community of Atlin.

The showing is located within sedimentary rocks of the Mississippian to Triassic Kedahda Formation (Cache Creek Complex) peripheral to a ring-dike complex associated with the Late Cretaceous Surprise Lake batholith (Surprise Lake Plutonic Suite). The batholith covers around 1100 square kilometres east and northeast of Atlin and has been dated at 70.6 plus or minus 3.8 million years (Map 52, notes). Around Gladys Lake, a ring-dike complex roughly 500 metres in diameter has formed well north of the main body of the pluton. The dikes have sharp intrusive contacts and are composed primarily of quartz and K-feldspar porphyritic alaskite with 2 to 5 per cent biotite. This complex has intruded into well-bedded cherts and argillites and massive limestone of the Kedahda Formation. Around the dikes there is an extensive hornfelsing halo marked by variable silicification, quartz veining and fracturing. The dikes themselves are not greatly silicified nor do they contain significant molybdenite mineralization.

Medium-grained flakes, books and rosettes of molybdenite occur within quartz veins, stockwork zones and stringers. Less commonly it occurs in fractures associated with the stockwork zone. Associated sulphides include pyrite, chalcopyrite and pyrrhotite with very minor scheelite and wolframite. Disseminated sulphides also occur away from the stockworks but within the hornfelsed zone. Molybdenite ranges from 0.02 to 0.07 per cent in the stockwork zone (Assessment Report 6818).

The Gladys Lake molybdenum prospect has seen intermittent exploration since 1969, when it was staked by prospectors as the Pip 1-10 claims and optioned to Amax Exploration Inc. Amax added the Sip, Tip, Dip, Dell and Joy claims and established a land holding of 232 contiguous tenures in a large (10 by 6 kilometres) block straddling Davenport Creek. In 1970, Amax then extended an old mine road 8 kilometres onto the property, built a camp on the east side of Davenport Creek and started a systematic, grid-based exploration program. Initially, Amax constructed and mapped a wide spaced compass and hip-chain grid and collected 940 soil, silt and water samples for geochemical analysis. Later, it tightened up the grid in the principal area of interest (east of Davenport Creek), re-mapped part of it and collected and analyzed a further 503 samples for molybdenum, copper, lead, zinc and silver, but not for gold. Amax located a molybdenum-in-soil geochemical anomaly that appeared to be associated with an “alaskite” ring-dike complex in hornfelsed metasediments. It sampled and studied the dike, dug pits over anomalous soils and bulldozed an aggregate of 1706 metres of trench in several wide-spaced areas. Some of the trenches were over 300 metres long. Amax also dug a further 1675 metres worth of bulldozer trench and drilled five diamond-drill holes for an aggregate depth of 738 metres. Unfortunately, the results were not filed for assessment purposes. In 1975, R. Wreggitt staked the Mok claims over part of Amax’s main area of interest, east of Davenport Creek. He optioned the ground to Quest Explorations Limited and R.H. Seraphim examined the property, briefly, for the company in 1978. He located Amax’s drill sites, and found the core in collapsed racks near the old camp site. R.H. Seraphim logged the core while R. Wreggitt selected pieces from each drillhole for analysis.

In 1989, R.H.D. Philip staked Amax’s principal area of interest east of Davenport Creek, as the Aspen claim group and optioned the ground to BWI Resources Limited. In 1990, BWI Resources conducted a program of prospecting and soil and rock chip sampling. It ran four wide spaced, east-west oriented soil lines across an area that Amax had previously noted as having anomalous molybdenum in its soils. BWI collected samples at 100-metre intervals and analyzed them for a large suite of elements, including gold and silver. In 1993, the company returned to the property and collected samples from three more wide spaced, infill, east to west oriented lines at 50-metre intervals and analyzed them for the same elements. There was very little interest in exploration for molybdenum in the 1990s. The Aspen claims lapsed and the ground remained open until staked by Mr. Ross as the Lett claims.

In 2005, the ground is currently under option to Globetech Ventures Corp. and two days were spent on the property and previous data assessed by R. Pinsent.

Bibliography
EMPR ASS RPT *2653, *6818, 20440, 23091, *28276
EMPR EXPL 1978-E272
EMPR GEM 1970-27; 1971-54
EMPR MAP 52 (10 pages of notes)
EMPR OF 1996-11
EMPR PF (Prospectors Report 1994-15 by Bruce Luckman on the Gladys Lake Property)
EMPR PFD 810831, 810834
GSC MEM 307
GSC OF 864
GSC P 74-47

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