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File Created: 08-Oct-1986 by Larry Jones (LDJ)
Last Edit:  19-Aug-2018 by George Owsiacki (GO)

Summary Help Help

NMI
Name MAYNER'S FORTUNE Mining Division Skeena
BCGS Map 103I047
Status Developed Prospect NTS Map 103I07E
Latitude 054º 24' 33'' UTM 09 (NAD 83)
Longitude 128º 39' 24'' Northing 6029102
Easting 522284
Commodities Limestone Deposit Types R09 : Limestone
Tectonic Belt Coast Crystalline Terrane Stikine, Plutonic Rocks
Capsule Geology

The Mayner’s Fortune occurrence is located 4 kilometres west of Lakelse lake on the Lakelse River, approximately 12 kilometres south of Terrace.

Several isolated blocks of massive, Permian(?) limestone outcrop just west of Lakelse Lake. The limestone is contained in a sequence of thin bedded quartzite, graphitic argillite and argillaceous limestone that is intruded by Jurassic to Tertiary granite and diorite of the Coast Plutonic Complex. The limestone is usually white, but sometimes displays a green or bluish grey colour. It is extensively recrystallized and coarse grained in texture. Epidote-garnet skarn zones with minor magnetite and sulphides are locally developed in the limestone.

One 30-metre thick block of limestone extends for 108 metres northeast from the Lakelse River, crossing the Canadian National Railway at the 10 Mile Point. The bed strikes 040 degrees and dips 25 degrees southeast. The block is estimated to contain at least 454,000 tonnes of limestone. A representative sample from this block assayed 96.3 percent calcium carbonate and 1.59 percent magnesium carbonate (Property File - K.P. Bottoms, 1967, pages 3, 10). At least two other deposits of relatively pure limestone outcrop to the southeast.

Inferred reserves for the 10 Mile zone measured 454,000 tonnes grading 96.3 per cent limestone (Property File - K.P. Bottoms, 1967, page 10).

In 1966–1967, a mineral exploration program of combined photogeological and field geological analysis and photogeology was conducted in the area by Cree Lake Mining Company Limited.

In 2016, Durango Resources Inc. conducted a mapping and rock sampling (27) campaign on the Mayner's Fortune limestone property. The property hosts five historically mapped subparallel limestone units. Durango completed two exploration visits which included sampling to test limestone quality and mapping to substantiate historic reports. Limestone unit No. 5 was chosen to be the focus of the mapping survey, based on its historically reported thickness and quality as well as accessibility, considering limitations introduced by recent snowfall in the area. The limestone unit was mapped for an extent of 650 metres along strike and up to 140 metres apparent thickness along surface near the centre of the claim. The unit strikes approximately north and dips to the east at 55 to 60 degrees. Porphyry intrusions and narrow mafic dikes were found to crosscut the unit in a few locations and are estimated to comprise approximately 10 to 15 per cent of the total strike length mapped. The unit remains open toward both the north and south, and average maximum thickness has yet to be confirmed. The results from this survey compare well with historical mapping which estimated the limestone units to measure at least 1600 metres along strike, while remaining open at both ends (spanning the entire length of the claim block), and up to 180 metres apparent thickness at the southern end of the claim block. Out of eight unique samples taken from limestone outcrops at the Mayner's Fortune property, all eight yielded grades greater than 86.9 per cent CaCO3 (48.7 per cent CaO) (Press Release – Durango Resources Inc., December 6, 14, 2016).

Bibliography
EMPR ASS RPT *3585, 36203, 36945
EMPR GEM 1970-97,98; 1971-113
EMPR MAP 8
EMPR PF (*Cree Lake Mining Ltd., Bottoms, K.P. (1967-01-01): Report on the Lady Luck, Mayners Fortune, Gabe and Lucky Fortune Mineral Claim Groups pp.3,10)
EMPR PF Placer Dome (Haman (1967): Photogeology applied to mining exploration in the Terrace area, BC; X-Ray Assay Lab. (1966): Certificate of Analysis No. 8187; McPhar Geochemical Lab. (1966): Results of Analysis - Lady Luck and Mayners Fortune Claim Groups; Cree Lake Mining Ltd. (unknown): Soil sampling map; Hage (1967): Letter to J.B. Redpath re Lady Luck and Mayners Fortune Claim Groups; Redpath (1967): Memo to G.S.W. Bruce re Lady Luck and Mayners Fortune Claim Groups; Haman (1966): Geology of the Terrace Area, BC, Lady Luck and Mayners Fortune Mineral Claim Groups)
GSC MAP 11-1956; 278A; 1136A; 1385A
GSC MEM 329 pp.14-17
GSC OF 1136
PR REL Durango Resources Inc., Oct.25, Nov.1, Dec.*6,14, 2016; Feb.8, 2017

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