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File Created: 11-Dec-2013 by Garry J. Payie (GJP)
Last Edit:  04-Apr-2022 by Karl A. Flower (KAF)

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Name THORN G, G ZONE, ABERLOUR, THORN, GEE Mining Division Atlin
BCGS Map 104K056
Status Showing NTS Map 104K10W
Latitude 058º 32' 50'' UTM 08 (NAD 83)
Longitude 132º 49' 04'' Northing 6491697
Easting 627004
Commodities Gold, Silver, Lead, Zinc, Copper Deposit Types H04 : Epithermal Au-Ag-Cu: high sulphidation
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Insular Terrane Stikine
Capsule Geology

The Thorn (G zone) area is underlain by feldspar-quartz-biotite-phyric diorite of the Late Cretaceous of the Windy Table Complex (Thorn Stock), which intrudes Upper Triassic Stuhini Group volcanic and sedimentary rocks. A second Late Cretaceous magmatic event deposited subaerial volcanic rocks of the Windy Table Suite non-conformably upon the Thorn Stock, coeval with a second stage of plutonism.

The G Zone is located in Gee Creek about 400 metres upstream from its mouth in La Jaune Creek. It comprises three concordant quartz-carbonate-arsenopyrite-pyrite replacement-style veins that abruptly change thickness (maximum of about 50 centimetres width) and arsenopyrite content along strike. The veins are hosted by Upper Triassic Stuhini Group mafic volcanic rocks and interbedded dark grey siltstone. At the G Zone, the Stuhini stratigraphic layering strikes west and dips moderately to the north (about 270 degrees/50 degrees north dip). The veins are oriented at about 120 degrees/55 degrees south dip and have formed along faults that offset Stuhini Group rocks.

The widest and most conspicuous vein occurs to the eastern side of the outcrop (downstream) and yielded the highest gold values from sampling in 2000 (sample 606641). A 2.0 metre chip sample (206641) assayed 57.38 grams per tonne gold, 89.7 grams per tonne silver, 0.287 per cent copper, 0.260 per cent lead, and 0.372 per cent zinc (Baker, D. (2010-10-28): 2010 Technical Report on the Thorn Property).

Sampling in 2005 did not replicate these high gold values and in fact the highest gold value from the 2005 work (sample 378863) was from a previously un-sampled vein 15 metres upstream. This sample assayed 17.4 grams per tonne gold, 156 grams per tonne silver, 0.03 per cent copper, 0.49 per cent lead, and 0.37 per cent zinc (Assessment Report 32769).

Several similar quartz-carbonate-sulphide veins, including the Whiz Vein, are present in the area 400 metres south of the G Zone to the contact between the Stuhini Group rocks and the Thorn Stock. These were not examined in 2011.

The G Zone style of veins are widespread and are thought to be part of the same system as the enargite-tetrahedrite veins found in Camp (104G 116) and La Jaune Creeks.

THN11-52 was the only hole to be drilled on the west side of La Jaune Creek in 2011, as well as the only hole not to target the Oban Breccia or high-sulphidation veins within the Thorn Stock. It was collared 80 metres southeast of the high-grade surface exposure of G Zone quartz-arsenopyrite-chalcopyrite veining. No sulphide mineralization was encountered in the hole with the exception of three small pyrite veins and no significant base or precious metals were intersected.

Structurally controlled alteration at Aberlour consists of silica flooding, and silica-cemented hydrothermal breccia, strong clay alteration, sericite alteration and iron oxide. Vuggy quartz and quartz-carbonate veining is apparent in surface outcrops. Alteration of the host andesite (or basalt?) distal to the structural zones is characterized by strong chlorite, calcite and weak epidote alteration. The mineralization is a structurally controlled zone of quartz-sulphide hosted by Stuhini mafic volcanics that appears to be 1 to 4 metres wide. The zone trends approximately 140 degrees and dips steeply with east-west cross structures. The zone is partly exposed in a recessive drainage for about 30-50 metres. Sample Q049457 from the 2016 program is a one meter rock chip sample that returned 19.39 grams per tonne gold and 136 grams per tonne silver (Assessment Report 36638). Sulphide mineralization is dominated by pyrite-tetrahedrite (-tennantite?) plus/minus galena associated with silicified hydrothermal breccia. One of the most significant Aberlour drill intersections was 3 metres (from 13 to 16 metres) grading 1.72 grams per tonne gold, including 1 metre of 4.42 grams per tonne gold (Assessment Report 36638). Another hole intersected 0.45 metre grading 5.5 grams per tonne gold and 33 grams per tonne silver (Assessment Report 36638). See Location Comments for Aberlour information.


During 2011 Brixton Metals carried out an exploration program consisting in 5682.37 metres of drilling, mostly on the Oban. In 2012, Brixton Metals completed a total of 26 NQ core holes drilled into the Oban breccia zone, for a total of 2,889.67 metres.

In 2013, Brixton Metals drilled 35 diamond drill holes during a two-phase exploration program for a total of 6.078 metres at the Oban, Talisker and Glenfiddich zones, collected 1,368 soil samples and 13 rock samples, conducted a specific gravity survey on drill core, contracted SRK Consulting Canada Inc. to perform detailed structural analysis of the Thorn Property. In 2013, Brixton Metals Corp collected a total of 44 samples southwest of La Jaune Creek in order to follow up on previous soil and rock samples. These yielded three samples between 50 and 100 parts per billion gold, two samples between 100 and 500 parts per billion gold, and 1 sample greater than 500 parts per billion gold (Figures 12B, 14B, 15D and 16D, Assessment Report 34506). The highest-grade sample (2800 parts per billion) was collected along Hook Creek (Figure 12). In 2013, Brixton also contracted SRK Consulting Canada Inc. to perform detailed structural analysis on the Thorn Property. The resulting report can be found in Appendix A of Assessment Report 34506. Structural geology maps and three-dimensional (3D) fault models are presented, and the related structural pattern is discussed. Discussion focused on several prospects including Oban, Talisker, B (Glenfiddich?), I zone (104K 170), Lagavulin (104K 172), MP and D zones. See Camp Creek Corridor (104K 116).

In 2014, Brixton Metals drilled 8 holes totalling 1,287.46 metres at the Outlaw (104K 083) and Glenfiddich (104K 186) zones, collected 16 soil samples and completed further reclamation and physical work. In 2014, Brixton Metals Corp established a combined inferred resource estimate for Oban (104K 168), Glenfiddich (104K 186) and Talisker (104K 133) zones at 7.4 million tonnes, grading at 89.75 grams per tonne silver equivalent (Assessment Report 35192).

In 2016, Brixton Metals carried out a two-phase exploration program at the Thorn Property. During this time, 2303 soil samples and 247 rock samples were collected, a 15.49 line-kilometer Titan-24 DCIP geophysical survey was conducted over the area of the Chivas Zone (discovered 2014?), and 9 diamond drill holes were drilled at the Outlaw and Aberlour zones, totalling 1,645 meters (Assessment Report 36638). Five holes (THN16-131-135) for a total of 1,189.86 metres were completed at the Outlaw zone and four holes (THN16-136-139) for a total of 455.05 metres were completed at the Aberlour from 1 pad. See the Location Comment for information on Aberlour.

In 2017, the Brixton Metals Corporation exploration program on the Thorn property consisted of 2455 metres diamond drilling in 10 holes, the collection of 517 soil and 56 rock samples, a 176.60 square kilometre aerial Lidar geophysical survey and detailed geological and alteration mapping at a 1:2,500 scale. The majority of rock and soil samples were collected from the Chivas Zone. Samples were also collected at the Cirque Zone, as well as in unexplored areas located north of the Sutlahine River, and northeast and south of the Chivas Zone.

In 2020, Brixton Metals Corporation completed a program of geochemical (rock and soil) sampling, a 12.5 line-kilometre ground induced polarization survey, a 715 line-kilometre airborne magnetic and electromagnetic survey and 19 diamond drill holes, totalling 5292 metres, on the area of as part of the Thorn property. Drilling was performed on the Outlaw (MINFILE 104K 176) occurrence area.

Refer to Thorn (104K 031), Oban (104K 168) and Camp Creek Corridor (104K 116) for related details and a more complete work history of the Thorn property, of which the Thorn G zone is part of.

EMPR AR 1963-6; 1964-11; 1965-17
EMPR EXPL 1981-242; 1983-546; 1999-19-31; 2000-1-8; 2003-6; 2004-26; 2005-28
MER 2003-16; 2004-13; 2005-7
EMPR OF 1998-8-E, pp. 1-25
EMPR PF (Offering of Rights. Consolidated Inland Recovery Group Ltd.; Rimfire Minerals Corporation Website (Feb.2000))
GSC MAP 6-1960; 1262A
GSC MEM 362, p. 56
GCNL #183, 1968; #57,#139, 1986; #128(Jul.5), #196(Oct.13), 2000
N MINER Aug.12, Dec.2, 2002; Oct.28, Sept.8,25, 2003
N MINER Aug.12, Dec.2, 2002; Oct.28, Sept.8,25, 2003
PR REL Cangold Limited (First Strategies Au Corp.), Jan.17 2002; Oct.10, 2002; Apr.3, May15, Jun.5; Jun.29, Sept.24, 2003; Rimfire Minerals Corp., Mar.26, Jul.15, Dec.5, 2002; Jun.9, Nov.12,24, Dec.18, 2003; Jun.29, 2005; Rimfire Minerals Corp. and Cangold Limited Oct.10, 2002; Jun.24, Aug.27, Sept.25, Oct.27; Jun.4, Aug.4, Sept.27, Nov.18, 2004; Jan.7, Jun.6, Jul.26, Aug.8, 2005; Brixton Metal Corp Aug.*5 2016
*Baker, D. (2010-10-28): 2010 Technical Report on the Thorn Property
Burrell, H., Deiss, A.M. (2021-06-23): Thorn Property NI 43-101 Technical Report Sutlahine River Area, British Columbia, Atlin Mining Division