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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  21-Aug-2020 by Karl A. Flower (KAF)

Summary Help Help

NMI 093M4 Ag4
BCGS Map 093M013
Status Prospect NTS Map 093M04E
Latitude 055º 06' 04'' UTM 09 (NAD 83)
Longitude 127º 32' 33'' Northing 6107000
Easting 593000
Commodities Copper, Molybdenum, Silver, Gold, Zinc, Lead Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Stikine, Plutonic Rocks
Capsule Geology

The Sultana prospect is located on the southeast side of the Rocher Deboule Range near the headwaters of Boulder Creek, 16 kilometres south of New Hazelton.

The hostrock is porphyritic granodiorite of the Late Cretaceous Rocher Deboule stock, which has been dated at 72 Ma (Geological Survey of Canada Open File 2322) and is part of the Bulkley Intrusions. Dikes of pegmatite, aplite, andesite and granite intrude the porphyritic granodiorite. Non-intrusive rocks on the property consist of dacitic volcanic flows, breccias and tuffs, possibly volcanic sandstone, conglomerate, shale, siltstone, hornfels and greywacke of the Upper Cretaceous Kasalka Group.

Folding of rocks on the property is complex. Generally, there appears to be one major structural event in which the folds are open, broad flexures with a northeast-trending axis, plunging 10-20 degrees to the northeast. This main feature is a synform with an axial trace located at or just south of the Sultana showing in the southeast corner of the property. The corresponding antiform axial trace is located to the northwest extending through the Red Rose mine area (093M 067). Parasitic(?) fold axes appear to be subparallel to the major northeast trend or have a northerly trend (Sutherland-Brown, 1960). Within the area Sutherland-Brown has mapped, three major through-going northerly trending fault structures known as the Cap, Chicago Creek and Pangea faults all of which dissect the property into four fault blocks. These structures are believed to be normal faults with displacements ranging from 600-900 metres. The central two fault panels are upthrown forming a horst. These central two panels are generally underlain by the Rocher DeBoule stock and surrounding Bowser Group sediments. The Red Rose Shear runs parallel to and is likely a subsidiary splay of the Chicago Creek fault in the Red Rose mine area. The Red Rose tungsten vein occurs where this shear passes through an intrusive tongue of diorite. Outside the diorite, the shear is mainly a narrow seam. The full extent of this shear is unknown but trends towards additional diorite tongues south of the mine. The diorite is distinct from the much larger Rocher DeBoule stock and these dikes have only been mapped at the Red Rose mine and around the headwaters of Red Rose Creek. The Mill fault is a northwest trending arcuate structure which according to Sutherland-Brown is older than the north-trending structures. The Mill fault is parallel to Red Rose Creek and appears to be offset to the south by the Chicago Creek fault where it continues eastward for some 3500 metres. Shearing is also evident locally throughout the granodiorite stock. In the Sultana showing area, there is a strong northwest trending fracture/shear/breccia zone about 75 metres wide which hosts disseminated silver-copper-molybdenum mineralization, and within the shear zone are conjugate northeast trending vuggy quartz veins up to 3.5 metres wide containing silver and copper mineralization.

The original mineralized outcrop is 20 metres long and up to 7 metres wide. The outcrop consists of fractured granodiorite hosting pyrite, tetrahedrite, molybdenite and chalcopyrite with some quartz gangue. The zone strikes 070 degrees, dipping 45 degrees to the southeast.

A 12-metre sample from trench F assayed 698.62 grams per tonne silver, 0.55 gram per tonne gold and 2.28 per cent copper (George Cross Newsletter No. 187, September 28, 1989).

An area of chalcopyrite-molybdenite mineralization occurs peripheral to the silver showing, and is associated with a north-trending fracture system with steep dips both east and west.

Drilling in 2011 (six NQ diamond-drill holes totalling 2594.44 metres) cut a weak to moderately sericite-chlorite+/-epidote altered medium-grained granodiorite indicative of the phyllic-propylitic alteration zone surrounding a porphyry-style deposit. Fracturing and vein density encountered in the current drilling was insufficient to increase the copper-molybdenum grade much above the 0.1 per cent range over any significant lengths in drill core. The best grades in the six hole drill program was from drillholes PC11-004 (324.00-375.00 metres) grading 0.11 per cent copper, 0.021 per cent molybdenum over 51.0 metres; PC11-005 (388.00-424.20 metres) averaging 0.11 per cent copper, 0.029 per cent molybdenum and 1.53 grams per tonne silver over 36.2 metres; PC11-006 which assayed 0.14 per cent copper and 0.022 per cent molybdenum over 29.00 metres (141.00-170.00 metres), and PC11-007 which intersected a 25.4-metre interval (317.90-343.30 metres) assaying 0.14 per cent copper, 0.0025 per cent molybdenum and 1.23 grams per tonne silver (Assessment Report 32636). Results of the 2011 drilling has expanded the moderately anomalous porphyry-style copper-molybdenum zone to approximately 300 metres in strike length (north-south) and up to 200 metres wide (east-west). Based on alteration, vein density and copper-molybdenum grade, drilling to date has been in the phyllic plus/minus propylitic zone of a copper porphyry system.

In 2017, a sample (1041864) of well mineralized material assayed 0.321 gram per tonne gold, 26.4 grams per tonne silver, 0.013 per cent tungsten and 5.75 per cent copper (Hanson, J. (2018-04-03): National Instrument 43-101 Technical Report on the Cobalt Mountain Property).

Sultana Work History

Intermittent work has occurred on the occurrence since it was first briefly described in 1910 as the Last Chance and Little Wonder claims. In 1923, one diamond-drill hole was completed on the property by Granby Consolidated Mining, Smelting and Power. In 1956, Canusa Mining completed several short drillholes on the claims. During 1966-73, the occurrence was partially held as part of the Schemo property by Pharaoh Exploration who completed road building, trenching, geochemical and geophysical surveys and 13 diamond-drill holes (911 metres). In 1968, the Silver Tip property was being explored by Sultana Silver Mines Ltd. At this time, eleven bulldozer trenches had been excavated exposing a silver-bearing vein over 16 metres and an area of fractured granodiorite mineralized with chalcopyrite. Assays of the silver-bearing vein averaged 617 grams per tonne silver across three metres. The copper-molybdenum mineralization had been mapped over an area of 90 by 150 metres (Property File Cyprus Anvil - Campbell, D.D., 1968). The same year five drillholes were completed on the property for a total length of 224 metres. One drillhole intersected the vein with yielded assays of 178 to 580 grams per tonne silver, 0.55 to 0.87 gram per tonne gold and 0.64 to 9.06 per cent copper (Property File Cyprus Anvil -Saunders, C.R., 1970).

Work History for Porphyry Creek property (Sultana Gold, 2008-2012, Assessment Report 32636)

In 1923, the Sultana area was optioned to Granby Consolidated Mining, Smelting and Power and open cuts were cleaned out and deepened, drilling took place and 2.4 tonnes of ore shipped. Work stopped and the option relinquished.

In 1925, John Miller worked on the Brunswick. No. 1 tunnel which was driven 20 metres; nine tonnes of ore was mined. The No. 2 tunnel was run 52 metres to meet the downward extension of No. 1 tunnel. A short aerial tram conveyed the ore. Also In 1925, some work of an unknown nature was done on the Brian Boru (093M 064) by J. Creagh. In 1926, Creagh and Dunbar worked on the Brian Boru on nine claims and two Crown grants. Exploration work was done in open cuts and short adits. Little work was done after the 1920s.

In 1926, J. Creagh discovered the Killarney showing (093M 114) and completed open cuts over several hundred feet on the south fork of Brian Boru Creek.In 1927, J. Miller continued work on the Brunswick occurrence (093M 066). In 1927, J. Creagh continued work on the Brian Boru occurrence. In 1927, D. MacDonald conducted work on the Black Pilot occurrence (093M 115).

In 1930, D. MacDonald conducted work on the Black Pilot which included a 12-metre tunnel on the Summit claim on a 0.9 metre wide vein. An open cut exposed a 4.9 metre width of mineralization on the True Blue claim. A 12 metre inclined shaft, a short tunnel and a 4.6 metre tunnel was completed on the Black Pilot open cuts. In 1931, D. MacDonald conducted assessment work on the Summit, True Blue (093M 115) and Black Pilot mineral claims. In 1931, J. Miller conducted assessment work on the Brunswick group of claims. In 1939, G. Christensen conducted surface work on the Sultana.

In 1951, Skeena Silver Mines Ltd. restaked the property adding additional claims to the Brunswick group. A property visit was made with a view to installing mining equipment. In 1951, Parent, L. & Associates restaked the Sultana group of claims and improved the trail into the property along Boulder Creek. In 1952, Skeena Silver Mines Ltd. conducted 69.5 metres of drifting along the Brunswick vein which was displaced by fault. The faulted segment was later found by four short diamond-drill holes and one longer drillhole. In 1952, Skeena Silver Mines Ltd. made a discovery of scheelite on Armagosa Creek. In 1953, the Sultana was optioned to Northern B.C. Mining Co. Ltd. from Parent, L. & Associates. The property was visited and geological mapping and sampling of open cuts was done with eight samples being collected. In 1956, the Sultana was restaked as the Snowshow 1-8 claims. Several short drillholes on the claims were completed.

In 1966, Sultana Silver Mines incorporated and acquired the Silver Tip group of 50 claims. In and 1968 and 1969, a 16 kilometre access road was constructed on the south side of Boulder Creek from Highway 16. Twenty trenches made by bulldozer were completed. Drill records were documented with assay results for nine BQ drillholes S1, S2, S4, S6, S14 to 17 and M1, totalling 26.5 metres (Property File).

In 1970-71, Sultana Silver Mines optioned the Sultana to Utah Construction & Mining Co. Geological mapping and grid rock sampling resulted in the collection of 81 samples. An induced polarization (IP) survey, lines spaced 120 metres apart with 60 metre stations, was completed. Drill records indicate two diamond-drill holes, C-1 and C-2, totalling 305 metres (Property File).

In 1973, the Brunswick was optioned to Arcadia Explorations. Underground to surface transit surveying and a topographic plan was completed. Geological mapping of the showing and seven grab samples were collected. An electromagnetic survey line was completed over the adit vein and a self-potential survey on five cross-lines was completed. A bulldozer excavated Trench 1 and Trench 2.

In 1978, Van Gaalen and others collected 200 samples on the MT occurrence (093M 063) but only two grab samples were analyzed. In addition, 6.4 kilometres of trail were completed.

In 1979, Noranda collected four rock samples from the Brian Boru occurrence (Property File).

In 1980, 1981, and 1984, Asarco Exploration established a grid on the Brian Boru/Killarney occurrence area and collected 156 soil samples. Later, mapping and 63 rock and 15 soil samples were collected. In 1985, Asarco mapped and prospected the Killarney Grid collecting 74 rock and talus samples. An extension of the soil survey grid was made and 341 samples were collected; silt sampling of creeks resulted in 17 samples.

In 1982, Pharaoh Exploration Inc. conducted a property examination in the Sultana area.

In 1987, Catoosea Resources relocated old workings and prospect for new targets on the Brian Boru/Killarney. Mapping was completed on the Brunswick, Balsam, No. 4(?), Kaslo and Betty veins (Assessment Report 16012).

In 1987, Southern Gold mapped and prospected the Armagosa showing, collecting nine rock grab and 38 soil/talus samples. Some geophysical surveying was completed (Assessment Report 16714).

In 2007, Crucible Resources Ltd. completed an option on the Brunswick and Jupiter from D. Warkentin. Two chip samples were taken in the Brunswick area and one float and two stream samples were collected in the Jupiter area (093M 065). Four stream, two chip, one float and four talus samples were taken at the Armagosa; five stream silt samples were taken in the Brian Boru area, and one stream and five float samples were taken in the Porphyry West area.

In 2008, Duncastle Gold Corp. collected two rock samples, five stream sediment samples and three soil samples on the Killarney (Assessment Report 30096). Also in 2008, Duncastle Gold Corp. collected 51 rock and 53 silt samples in the Brunswick, Jupiter, Armagosa (093M068) and Brian Boru areas (Assessment Report 30431).

In 2010, Dunham Gold Corp. completed a 495 kilometre airborne geophysical survey on its Porphyry Creek property which covered numerous showings including the Big Thing showing (093M 062) (Assessment Report 31728). The general magnetic signature interpreted for the Sultana area is that of an irregular oval shaped magnetic high about 2.5 kilometres in diameter with another magnetic high forming the core of the anomaly. This overall image is indicative of the classic porphyry model.

In 2010, Ranex Exploration Inc./Duncastle Gold Corp. conducted site visits to Sultana, Tina North (093M 060), Big Thing and MT; 480 soil samples were collected and three diamond-drill holes were completed for a total of 1330.5 metres (Assessment Report 32516). Geophysical areas of interest were prioritized using geological, structural, geochemical and logistical criteria and six priority sites were visited by the Ranex staff: Sultana, MT, Big Thing, Tina West and Porphyry East A and B. This Sultana prospect was the main focus of the 2010 exploration and drilling program.

In 2012, six NQ diamond-drill holes totalling 2594.5 metres were completed on the Sultana (Assessment Report 32326).

The Porphyry Creek project consists of 13 mineral claims covering an area of 4811 hectares (ca. 2017). The claims overlap a small group of Crown-granted claims that surround the past-producing Red Rose tungsten mine (093M 067) and it is assumed that this area is fully excluded from the property.

The Porphyry Creek property contains eight separate MINFILE occurrences listed as: Armagosa (093M 068), Balsam (093M 059), Big Thing (093M 062), Brian Boru (093M 064), Brunswick (093M 066), Jupiter (093M 065), Sultana (093M 061), and Tina (093M 060). The Brunswick mine had some minor production from two adits driven to 20 and 52 metres, respectively and possibly from open cuts, prior to 1950. Development occurred mainly in the 1920s, and the total amount of ore produced is unknown, but ‘thirty bags’ of handpicked ore are reported from a later operator in 1954. Other occurrences that are reported to have some old development workings include the Armagosa and the Brian Boru, consisting of small open cuts and short adits. The Sultana prospect has had more extensive past exploration, including substantial trenching (essentially small-scale mining) and limited drilling on a high grade silver vein. This prospect was the main focus of an exploration and drilling program in 2010 and 2011 that identified extensive low grade copper and molybdenum mineralization below and to the northwest of the historical workings.

Beginning in 2008, Duncastle Gold Corp. carried out geochemical and geophysical surveys over wider areas of the Porphyry Creek property, which was significantly larger than the current property area. This was followed by drilling in the Sultana area. Areas on the west side of the property were prospected and a stream sediment geochemical survey was conducted in 2008. A property-wide airborne geophysical survey was carried out in 2010 that included magnetic, electromagnetic and radiometric measurements. Short site visits were also made to the MT showing (093M 063), the Big Thing showing and various areas of geophysical interest around the Tina showing.

In July of 2014, operators Kyler Hardy, Tim Johnson and Crucible Resources Ltd. conducted an exploration program in two areas of the Porphyry Creek property, including rock sampling, mapping and prospecting in the Brunswick area, and soil sampling and site reclamation work in the Sultana area.

In 2015, operators Kyler Hardy, Tim Johnson and Crucible Resources Ltd. conducted a limited ground exploration program of prospecting, rock, soil and stream sediment geochemical sampling in the Red Rose Creek area, Slater Creek area and Sultana/Boulder creeks areas. A total of eight rock samples, twelve soil and silt geochemical samples, and three tailings samples were collected

In 2016, operators Kyler Hardy, Tim Johnson and Crucible Resources Ltd. conducted prospecting and rock sampling in the Brunswick mine area as well as in-fill soil and talus samples to the north and east of the old Sultana workings, and the Red Rose Creek area.

In February of 2017, the owners of the Porphyry Creek property agreed to option the claims to Lansdowne Holdings, a private company seeking a Canadian Securities Exchange listing. The work completed in the same year consisted of prospecting and soil sampling in the Sultana area and the Ridge Target in the Red Rose area of the property. The purpose of the work was to systematically follow up on geophysical anomalies identified by an airborne geophysical survey completed in July of 2010.

In 2018, Lansdown Holdings completed a minor program of prospecting and soil and rock sampling on the area.

EMPR AR 1921-100; 1922-99; 1923-107; 1967-85
EMPR MAP 69-1 (#272)
EMPR BULL *43-68
EMPR FIELDWORK 2006, pp. 1-17
EMPR GEM 1969-85; 1970-173; 1971-188; 1973-356
EMPR OF 2008-6
EMPR PF (Key Largo Resources Ltd. Prospectus, 1989; Sketch plan of main mineralized zone and Plan of Silver Tip Group, Sultana Silver Mines Ltd., 1967; Tidsbury, A.D. (1967): Progress Report and Preliminary Report for the Silver Tip Mineral Claims); Cyprus Anvil (Campbell, D.D. (1968-09-10): Progress Report, Sultana Silver Property; Coxall, P. (1968-11-29): Drill Record - Boulder Creek; Saunders, C.R. (1970-01-20): Report on Sultana Property; Donders, C. (1970-09-01): Induced Polarization Survey Map of the Sultana Property, Resistivity I; Donders, C. (1970-09-01): Induced Polarization Survey Map of the Sultana Property, Chargeability I; Donders, C. (1970-09-01): Induced Polarization Survey Map of the Sultana Property, Resistivity II; Donders, C. (1970-09-01): Induced Polarization Survey Map of the Sultana Property, Chargeability II; Blatt, H.K. (1970-09-01): Rock Geochemical Survey Map, Sultana Property, Copper ppm; Blatt, H.K. (1970-09-01): Rock Geochemical Survey Map, Sultana Property, Zinc ppm; Blatt, H.K. (1970-09-01): Rock Geochemical Survey Map, Sultana Property, Moly ppm; Blatt, H.K. (1970-09-01): Geology Map, Sultana Property; Anderson, R.B. (1971-01-26): Report on Geology, Geochemistry and Geophysics, Sultana Group; Anderson, R.B. (1971-06-20): Descriptive Geology sheets; Placer Dome (Saunders, C.R. (1982-02-15): Property Submission: Schemo Property)
GSC MAP 971A, 44-24
GSC MEM 223, p. 77
GSC SUM RPT 1910-97
GSC OF 720; 2322; 5705
V STOCKWATCH Dec.14, 1989
GCNL #187,#213, 1989
PR REL Duncastle Gold Corp. Jan.26, 2009, Jul.26, Sept.14, 2010, Sept.*28, 2011
*Hanson, J. (2018-04-03): National Instrument 43-101 Technical Report on the Cobalt Mountain Property
Hanson, J. (2019-01-10): NI 43-101 Technical Report on the Cobalt Mountain Property