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File Created: 11-Oct-1991 by Keith J. Mountjoy (KJM)
Last Edit:  27-Jan-2018 by George Owsiacki (GO)

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NMI
Name BEND 2900, BEND 1-45, BEND 1, BEND, CANYON ZONE, MGM, CUMMINS RIVER Mining Division Golden
BCGS Map 083D009
Status Showing NTS Map 083D01E
Latitude 052º 02' 57'' UTM 11 (NAD 83)
Longitude 118º 13' 14'' Northing 5767210
Easting 416302
Commodities Silver, Zinc, Lead, Gold Deposit Types E14 : Sedimentary exhalative Zn-Pb-Ag
Tectonic Belt Foreland Terrane Ancestral North America
Capsule Geology

The Bend 2900 occurrence is located on the southeast slope of the Cummins River canyon, about 112 kilometres south-southeast of Valemount. The showing is approximately 300 metres southeast along strike from the Bend 1 Canyon Zone occurrence (083D 001) and is one of four newly described massive sulphide outcrops occurring at consecutively higher elevations beginning at 750 metres. The mineralization was discovered in 1987 by Cominco during an access road and drill site construction project. These newly discovered occurrences extend southeast of several known stratiform exhalative massive sulphide showings including the Bend 1 Canyon Zone and the Bend North Road Zone (083D 002) forming a zone trending west-northwest almost 330 metres long and approximately 60 metres wide, on the north side of the Cummins River canyon.

A sequence of quartzites, carbonates and pelites of the Hadrynian Miette Group through the Lower Cambrian Gog Group through to the Middle Cambrian Chancellor Group comprises the rocks of the Southern Park Ranges in this area. Individual beds generally strike 290 degrees and dip 55 degrees northeast. For a more comprehensive description of the regional geology and work history refer to the Bend 1 Canyon Zone occurrence (083D 001).

Stratiform mineralization at the Bend 2900 showing occurs within the Middle Cambrian Tsar Creek Formation of the Chancellor Group. The showing consists of five bands of massive pyrite, sphalerite, galena, and magnetite alternating with siliceous sulphide layers. Sulphide mineralization alternates with layers of manganiferous dolomite containing lenses of massive pyrite, sphalerite and galena. The zone is approximately 5 metres thick. The southern edge of the mineralization is in contact with micaceous quartzite containing disseminated and podded pyrite, pyrrhotite, sphalerite, and galena. Selected bands of the massive sulphide mineralization assayed 0.432 gram per tonne gold, 40.69 grams per tonne silver, 4.1 per cent lead and 10.0 per cent zinc (Assessment Report 16544). A weighted average of a chip sample over 4.7 metres from all five bands of massive sulphide mineralization assayed 12.9 grams per tonne silver, 1.2 per cent lead and 4.5 per cent zinc (Assessment Report 16544).

Other mineralized outcrops were discovered at 792 metres, 823 metres, 914 metres and 1067 metres elevation consecutively, along strike. These outcrops are considered here to be part of the Bend 2900 showing. A highly oxidized sample from 792 metres elevation, 70 metres along strike from the Bend 1 Canyon Zone, assayed 34.0 grams tonne silver, 1.2 per cent lead and 2.2 per cent zinc (Assessment Report 16544). Rubbly outcrop of manganiferous dolomite from 823 metres elevation assayed 21 to 87 grams per tonne silver, 1.1 to 4.5 per cent lead and 7 to 16 per cent zinc over less than one metre (Assessment Report 16544). At 914 metres elevation, small rods of fine lenses of pyrite, sphalerite and galena were noted in sericitic schist. A few mineralized quartz-filled fractures were found in a small oxidized zone within manganiferous dolomite exposed at 1067 metres elevation, about 300 metres southeast along strike from the Bend 1 Canyon Zone.

Bibliography
EMPR AR 1959-90,104; 1967-264
EMPR FIELDWORK *1986, pp. 47-52
EMPR GEM 1970-446
EMPR OF 2000-22
EMPR PF (Claim, trenching, diamond drilling and geology maps, The Consolidated Mining and Smelting Company (1967); Field Notes, J.T. Fyles (1970))
GSC OF 2324
GSC P 66-1, pp. 51-62
CJES 15, pp. 86-98
GSA MEM 153, pp. 445-461
PR REL Orphan Boy Resources Inc., Mar.17, 2004

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