Virtual Museum ID: 19-DE02
Erythrite is a secondary hydrated cobalt arsenate mineral. It has a distinctive colour, deep red, which is caused by its cobalt content. Erythrite is found near other deposits such as cobalt, silver and nickle. It crystalizes in a monoclinic system and forms prismatic crystals.
The information listed below relates to the current holding location or collection that the sample is from, and whether the item is viewable at that location or is part of a private collection. Coordinates are given as guides, and we remind you that collecting specimens from these locations is not allowed. Caution is advised visiting such sites and Below BC assumes no responsibility for any injuries or trespassing charges that may occur as a result of the viewer entering these sites.
Original Collection:Dan Ethier (DE)
Virtual Museum ID:19-DE02
Date Added to VM:2019-08-18
Sample Origin:Stewart area, B.C.
Specific Site:Clone Mine
Datum:09 (NAD 83)
Primary Mineral Formula:Co3(AsO4)2 · 8H2O
Advanced Geological Information
The following section provides geological data relating to the specimen or the site it was collected from, when available. Information has been obtained from various sources including private and government datasets but may not be up to date. Any geological time periods or ages listed often relate to the primary geology of the area, and may not be the actual date of an event such as mineral formation.
Geological Formation:Hazelton Group
Geological Period:Lower Jurassic
Stratigraphic Age:174.1 to 201.3 Million Years
Minfile ID:103P 251
The Clone prospect is located about 20 kilometres southeast of Stewart, at the southern end of the Cambria Icefield.
Disseminated native gold and minor amounts of chalcopyrite, galena, pyrite and erythrite are hosted by shear-controlled veins and stockworks. Two types of mineralization have been identified along a strike distance of 1.25 kilometres associated with major northwesterly trending (320 degrees) shear zones (both ductile and brittle styles of deformation; i) hematite-cemented, chlorite +/-silica-rich breccia; and ii) semi- to massive sulphide stringer pods/zones. In addition, numerous splays are horsetailed off fault structures.
Hostrocks are Lower Jurassic Hazelton Group mega-breccia (debris flow?) and andesitic pyroclastic rocks to the east and argillaceous sediments to the west. Locally, a fine grained dacite porphyry dike intrudes both the hostrocks and the mineralized zones. In H structures, gold mineralization appears to be directly related to the presence of hematite and/or specularite in the hematite-cemented structures. Individual veins range up to 7 metres in width. Chalcopyrite is commonly associated with the gold-bearing zones. In the sulphide-bearing zones, veins range up to 6 metres in width. Cobalt assays up to 0.71 per cent were reported from trenches. Exploration focus is a possible 'elevation' control to dilational-controlled mineralization, with a corresponding increase in sulphides. Chlorite is present throughout. This 'elevation' control is suspected in drillhole 96-18 where a 30-metre intersection assaying 12.34 grams per tonne gold was obtained. Rocks are routinely stained for K-spar alteration; it appears that it is an initial (early), very pervasive phase in the altered andesitic rocks (and confirmed by thin section studies).
To date, drilling has tested about a 400 metre strike length of this system; the deepest mineralization section being to 200 metres. The rest of the systems are being sampled by hand-blasted trenches and (planned) drilling. Although some good, high-grade intersections are being reported, it appears there is difficulty correlating between holes (i.e. mineralization is 'dilational' in nature and may require detailed (e.g. 25 metre centre) drilling to define individual ore shoots). Nonetheless, it appears that the Clone property is a significant gold discovery, with very good potential to develop into a major gold mine. The hematite (+chlorite +silica +/-sericite) cemented zones are steeply dipping and contain specularite, chalcopyrite, magnetite and native gold (high purity > 95 per cent, as determined in the Cominco laboratory. The sulphide-dominated mineralization contains auriferous pyrite +/-arsenopyrite, and locally cobalt-bearing minerals(s) (erythrite bloom). Hematitization appears to be pre-introduction of gold; the specularite-bearing veinlets formed later and contain gold. These zones (H1, H2, and H3; S1 and S2) are en echelon over a major northwest trending 'shear' zone for approximately 60 metres in width.
In 1995, with Explore BC Program support, Teuton Resources Corporation carried out an integrated grassroots program of prospecting, geological, geochemical and geophysical surveys, trenching and diamond drilling, mostly concentrated on the southwest corner of the large Red property covering the periphery of the southwest Cambria Icefield. This work led to a significant gold discovery on the Clone 1 claim, resulting in an immediate option by Homestake Canada Inc. Teuton Resources Corporation and Minvita Enterprises Ltd. have entered into an agreement with Homestake Canada Inc. and Prime Resources Group Inc. on the Clone property. During 1995, 5.1 line kilometres of magnetic and electromagnetic surveys, 513.8 metres of trenching and 1070 metres of diamond drilling in 13 holes (testing both sulphide-rich and hematite-rich mineralization) were completed and 1542 rock samples were collected and assayed (Explore BC Program 95/96 - G165). In 1996, the property was explored by 1312.8 metres of trenching in 141 trenches, ground geophysics and 11,487.1 metres of drilling in 113 holes. In 1996, drilling traced the hematite-rich H-1 structure over a strike length of 330 metres and a vertical range of 236 metres. A total of 28 holes were drilled on the southeastern end of the zone. The holes intersected rock with grades ranging from 2.85 to 44.23 grams per tonne gold over drill intercepts of 2.2 to 50.9 metres; estimated true width is 36 metres. Cobalt values were as high as 0.13 per cent. Seven holes yielded no significant mineralization. The northern extensions of the H-1 and S-2A were tested by 12 holes. Results ranged from 4.1 metres grading 1.13 grams per tonne gold and 0.06 per cent cobalt (hole 66) to 0.49 metre of 30.51 grams per tonne gold (hole 65) (Northern Miner - November 11, 1996). Another intersection (hole 18) was 61.7 grams per tonne gold and 0.31 per cent cobalt over 5 metres (George Cross News Letter No.192(Oct.6), 1997).
As a result of a 17-hole drill program in 1997, Teuton Resources Corp. and Minvita Enterprises Ltd. conclude that cross structures to the sulphide and hematite shear zones control gold-cobalt mineralization.
A hornblende granodiorite sill that cuts altered rocks near the main shear/veins was dated at 200.4 +/- 1.3 Ma. The mineralization will predate this 200 Ma date. Given the high closure date for titanite (650 degrees Celsius) and upper crust emplacement of the sill, the date is also the age of crystallization (Fieldwork 2001, pages 135-149).
In 2003, Lateegra Resources Corp., under an option agreement with Teuton Resources Corp. and Minveta Enterprises Ltd., drilled nine holes totalling 470.6 metres; four tested the shear zone and three yielded high-grade assays. The most spectacular intersection was in drillhole CL03-2, which twinned a 1996 hole, and intersected 80.80 grams per tonne gold over an apparent width of 8.47 metres (Assessment Report 27297). Late in 2005, Canasia Industries Corp. struck an option agreement with Teuton Resources Corp. on the prospect. In 2006, a helicopter-borne geophysical survey was carried out over the Clone property on behalf of Teuton Resources Corp. and a total of 661 line-kilometres were flown. In 2009, Teuton Resources Corp. conducted a diamond drilling program on the Clone property as part of a larger program covering several Stewart area properties. Thirty-six holes were drilled in two phases, however, Assessment Report 31340 only covers the first five holes (up to August 9, 2009) totalling 337.1 metres from which 210 samples were taken and analyzed.
In 2010, Teuton Resources Corp. completed 1354 metres of diamond drilling in 16 holes and took a 34-tonne bulk sample (Information Circular 2011-1, page 20). In 2011, Teuton Resources Corp conducted a bulk sample program on the Clone property where each one-tonne lot returned an average grade of 137.1 grams per tonne gold for the 102 tonnes taken. The samples will be shipped for processing upon completion of metallurgical testing (Information Circular 2012-1, page 16). In 2012, Canasia Industries collected 20 one-tonne bulk samples that yielded an average of 53.1 grams per tonne gold (Information Circular 2013-1, page 12).
In 2016, the Clone gold property was owned by Makena Resources Inc., Silver Grail Resources Ltd. and Teuton Resources Corp. where work comprised seven diamond-drill holes with lengths reported to range between 38 and 137 metres. Reported assay results for the first hole included 6.43 metres grading 17.83 grams per tonne gold (Information Circular 2017-1, page 18).
In 2017, Sunvest Minerals Corp. collected grab and channel samples and resampled historic drill core at the Clone gold property. Channel sample results included 101 grams per tonne gold over 7.5 metres including 1.5 metres of 245 grams per tonne gold. Grab samples taken near the edge of retreating glaciers assayed 101 and 93.7 grams per tonne gold (Information Circular 2018-1, page 122).