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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  03-Jun-2020 by Karl A. Flower (KAF)

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NMI
Name STAR, DICK CREEK, COPPER CREEK, DK, STAR EAST, STAR NORTH, DK CREEK EAST, DK CREEK WEST, DK CREEK NORTH Mining Division Atlin
BCGS Map 104J022
Status Prospect NTS Map 104J04E
Latitude 058º 14' 04'' UTM 09 (NAD 83)
Longitude 131º 43' 59'' Northing 6458067
Easting 339536
Commodities Copper, Gold Deposit Types L03 : Alkalic porphyry Cu-Au
K01 : Cu skarn
G : MARINE VOLCANIC ASSOCIATION
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Star prospect (formerly Dick Creek) is located on the westerly-facing slopes of "Dick Creek" which is a tributary of the Hackett River, about 52 kilometres northwest of the community of Telegraph Creek.

Upper Triassic Stuhini Group andesitic flow rocks with subordinate sedimentary (tuffaceous) units are intruded by a bulbous, northeasterly elongated quartz diorite pluton. The pluton is at least 1100 metres long and up to 550 metres in width and has a multitude of subsidiary dikes. The intrusions are lithologically similar to the nearby Kaketsa pluton and are, therefore, believed to be cogenetic and coeval with the main intrusion that underlies Kaketsa Mountain to the west (Geology in British Columbia 1977-1981, page 176). The Kaketsa pluton is Late Triassic.

At the Star prospect, the main area of mineralization is exposed by trenches on southwesterly and west-facing slopes immediately to the north of "Dick Creek". Dick Creek is a small, westerly flowing tributary of the Hackett River. In the trenches, mineralization is found near the eastern margin of a small quartz diorite intrusion.

Northwesterly zones with crushed, clay-altered rocks form strong linear depressions, and the intervening rocks are broken by northeasterly trending fractures, joints and small faults. Country rocks are fine-grained andesite and porphyritic andesite or basaltic andesite.

Intrusions and adjoining country rocks are weakly hydrothermally altered to a propylitic assemblage. Saussuritization and chlorite-actinolite replacement of mafic minerals along with lesser epidote, calcite, magnetite and pyrite are the most widespread alteration type observed. The most pronounced alteration in outcrop is caused by near-surface weathering and oxidation. This supergene alteration results in a partially leached capping of clay altered limonitic rocks up to a few metres in thickness. The rocks are fine granular assemblages of quartz, albite, gypsum, zeolite, muscovite, clay minerals, chlorite, limonite and pyrite. These rocks are more abundant where faults and fractures are most strongly developed. Locally, jarosite and stilbite are present.

The "Dick Creek" showings of the Star property are similar to other known copper showings associated with the Kaketsa pluton. However, in this locality disseminated chalcopyrite and bornite are more widespread in the quartz diorite intrusion than in the other areas. In the northerly trenches, where weathering and oxidation are most pronounced, mineralization consists of black copper oxide, malachite, brochantite and cupriferous limonite. In the southerly, downhill trenches where rocks are less weathered, mineralization comprises disseminated chalcopyrite and traces of bornite as well as fracture-controlled malachite and azurite. Where chalcopyrite and bornite are abundant, magnetite is present but pyrite is relatively subordinate or absent. Most commonly, chalcopyrite occurs alone or together with pyrite. There appears to be a broad diffuse zone or halo of pyritic rocks surrounding the copper mineralized zone.

Pyrite is the dominant sulphide mineral in volcanic rocks surrounding the quartz diorite intrusion but overall pyrite content rarely exceeds 1 per cent. Copper sulphides generally replace mafic minerals whereas pyrite is present both as disseminations and fracture filling. Distribution of mineralized outcrops and assays from tractor trenches show that areas with average copper content in excess of 0.4 per cent copper are relatively widespread. Gold values are generally low (average 0.2 gram per tonne) but two samples analysed about 0.5 gram per tonne (Geology in British Columbia 1977-1981, pages 178, 179).

Supergene mineralization is restricted to a thin oxidized capping under which there is no appreciable secondary copper sulphide enrichment zone. The copper minerals that have formed are copper oxides, carbonates, sulphates and cupriferous limonites.

The main control on mineralization appears to be structural, principally fracturing, shearing and faulting, which controlled emplacement of the disseminated and vein hosted chalcopyrite. The copper-gold mineralization seems to display little or no preference for one rock type over another, or for one type of pervasive alteration over another, apart from a general association with quartz and pyrite alteration. About 60 per cent of the chalcopyrite occurs as very fine to fine disseminations, which are commonly associated with fine disseminated pyrite. The ratio of chalcopyrite to pyrite is variable, and it is quite common for either one to be the dominant constituent. The disseminated chalcopyrite most often replaces mafic phenocrysts and small dark patches (biotite?), and to a lesser extent, magnetite grains and feldspar phenocrysts. The remaining 40 per cent of the chalcopyrite occurs in hairline fractures, in veins millimeters to centimeters in width, and in breccia zones and knots. Here the chalcopyrite occurs by itself or in association with +/- quartz and or pyrite. Chalcopyrite also occurs, to a lesser extent, in association with +/- magnetite, K-Spar, epidote, carbonate, ankerite, anhydrite and gypsum. Many of the fractures and veins were filled as a single event, however a portion of them underwent multiple periods of infilling, as evidenced by an abundance of vein selvages. An encouraging amount of very late stage carbonate veins associated with +/- chalcopyrite, malachite, azurite, chalcocite, and limonite are also observed. Not surprisingly, unmineralized veins consisting of +/- quartz, magnetite, anhydrite, carbonate, etc. generally occur in far greater concentrations than the copper-gold mineralized veins and frequently display cross-cutting relationships that suggest changing structural conditions over time.

The alteration is typical of porphyry systems. It is characterized by quartz, shreddy biotite +/- K-feldspar +/- magnetite. This potassic alteration is overprinted by chlorite +/- sericite, and a final late carbonate phase. The carbonates present include at least two compositions (calcite, and possible ankeritic carbonate) and occur as both disseminated grains and cross-cutting veinlet infill. Gypsum is also present – possibly replacing anhydrite. An abundance of pervasive quartz to vein quartz alteration was observed in drill core, especially in the western-most holes, where intervals meters to tens of meters thick were altered to 70-90 per cent quartz. In some places, especially where the quartz was banded, veined or brecciated, the alteration was associated with better than average copper-gold mineralization. Magnetite alteration is moderately intense to very intense. It primarily occurrs as very fine disseminations, in hairline fractures and in very thin veins. Concentrations of magnetite occur in the laminated, flat lying tuffs cut by one drill hole (CC2004-06). Chalcopyrite is sometimes associated with magnetite. Minor to moderate amounts of potassium feldspar alteration as veins and patches was encountered in most drill holes. Disseminated and/or vein chalcopyrite was associated with the potassium feldspar in some places; however, in general it was not a preferred host for mineralization. An abundance of shreddy biotite (potassic) alteration appears to be common as is the tendency for disseminated chalcopyrite to occur in and around mafic minerals. Carbonate and anhydrite veins generally appear to represent later alteration events though their frequent association with moderate amounts of chalcopyrite and malachite is of interest. A discontinuous, moderate to strong pyrite halo exists around the mineralized area.

A second mineralized zone in volcanic rocks is located east of Dick Creek, about 500 metres east of the trenched showings. A grab sample of the skarn mineralization consisting of epidote, pyrite and fine-grained chalcopyrite and magnetite analysed 0.72 per cent copper (Geological Fieldwork 1977, page 70).

In 2014, at the Star East target, an area roughly 120 by 45 meters was outlined using a portable XRF analyzer. This area contained elevated copper values in outcrop and float roughly coincident with a previously defined copper-in-soil anomaly. Minor chalcopyrite was observed and massive epidote and potassic alteration is associated with the copper-in-soil anomalies. A 45 mV peak IP chargeability high, outlined by work done in the 2013 field season is seen east of the soil anomaly and anomalous outcrops. The rocks are interbedded plagioclase-augite porphyry and plagioclase lath porphyry with massive andesite and angular lithic tuff characteristics of the Upper Triassic Stuhini Group. Dikes of hornblende quartz diorite intrude the volcanic rock locally.

In 2014, at the Star North target, copper mineralization was identified in the area of a series of copper-in-soil geochemical anomalies. At the main Star North showing a small lens or vein of massive chalcopyrite approximately 10 centimetre thick and 1 metre long trending southeast and dipping steeply was identified in outcrop, along with a number of malachite stained fractures and boulders. Two smaller copper-in-soil geochemical anomalies approximately 200 to 400 meters north of the main Star North showing were investigated. Two types of primary copper mineralization were identified in this area. The first is small veins and stringers of semi-massive chalcopyrite and pyrite, with fine grained disseminated pyrite, most commonly found in strongly silicified and brecciated chert with lesser amounts found in plagioclase-augite andesite and basalt. The second is fine grained to blebby disseminated chalcopyrite and pyrite within quartz monzodiorite and monzonite. The first type of mineralization may be thought of as lenses of small volcanogenic massive to semi massive sulphides. Chalcopyrite and pyrite occur as lenses up to 10 cm thick within subaqueous volcanic rocks commonly displaying strong silicification. Historic work identified sulphide lenses up to 2 feet wide and 12 feet long (Assessment Report 2061). The second type of mineralization is considered porphyry style, as it occurs as trace to 1%, fine grained to blebby disseminated chalcopyrite within quartz monzodiorite and monzonite with strong potassic alteration.

WORK HISTORY

According to earlier assessment reports, the Copper Creek showing was first discovered in 1937. However, the first documented exploration in the area of the showing occurred in 1955 when Brikon Explorations Ltd. drilled four holes with an aggregate length of 149 metres to test the Copper Creek occurrence; records and hole locations are not available. From 1950-1964 both Kennco and Newmont worked ground primarily to the west of the Copper Creek claims, near the Sheslay River (104J 040) at the Kid (104J 004), Grizzly (104J 016), Ho (104J 023) and West Kaketsa (104J 024) occurrences. In 1964, Newmont Exploration carried out an airborne magnetometer survey over an area which in 2003 was covered by the Copper Creek claims of Firesteel Resources Inc.

From 1958 to 1973, Skyline Explorations Ltd. in conjunction with several joint venture partners, carried out grid geochemical sampling, ground geophysics (magnetics), geological mapping, and diamond drilling (6 holes, 1050 metres) on the Copper Creek occurrence presently covered by the Copper Creek 2 claim of Firesteel Resources, and the Pyrrhotite Creek occurrence (104J 018) (9 holes, 1097 metres) which in 2003 was covered by the PC 1-4 mineral claims. During this period, an induced polarization (IP) survey was conducted over the Pyrrhotite Creek showing area. The drilling was never filed for assessment but is mentioned in later reports. Most claims in the area expired in 1975 and 1976. United Cambridge Mines restaked the Copper Creek prospect in 1976, and discovered the Dick Creek porphyry copper prospect (104J 035).

During 1976 and 1977, United Cambridge carried out geological and geochemical survey work in the Dick Creek area covered in 2003 by the Copper Creek 1 claim. An extensive follow-up program of 10 kilometres of bulldozer trenching and road construction was carried out as well. In 1979, Utah Mines Ltd. carried out line cutting, geochemical sampling and geophysical surveying (magnetics, IP) immediately south of the Firesteel’s Copper Creek 2 claims (ca. 2003). In 1977, trenching yielded 0.33 and 0.44 per cent copper over 70 and 179 metres in trenches TR1W and TR2W, respectively (Caron, L. (2013-07-16): National Instrument 43-101 Technical Report on the Sheslay Property).

Further evaluation of the area between the Star and Copper Creek mineral occurrences was carried out in 1980 by United Cambridge Mines which included soil geochemistry and an IP geophysical survey. Further geological mapping and geochemical sampling was carried out by United Cambridge in this area during 1983 and 1984. A coincident gold-in-soil and IP anomaly was outlined between the Copper Creek and Dick Creek occurrences and an IP anomaly with scattered gold-in-soil values was outlined to the north of the Dick Creek occurrence. These anomalies were covered by Firesteel’s Copper Creek property claims in 2003.

Between 1987 and 1989, United Cambridge Mines Ltd. shifted their exploration work to the immediate south of the Copper Creek mineral claims in the area in which Utah had worked in 1979. Work included airborne geophysical surveys (magnetics, VLF-EM), geochemical sampling and geological mapping.

In 1991, Golden Ring Resources Ltd. commissioned Aerodat Limited to carry out 870 line-kilometres of airborne geophysics over 22 claims (including the area covered by Firesteel’s Copper Creek property). A data compilation of results of previous exploration programs within the project area was also carried out.

Follow-up work (223 soils) in the vicinity of the gold-in-soil with coincident IP anomaly (which United Cambridge previously outlined in 1983-84 between the Dick Creek and the Copper Creek occurrences) was carried out by Golden Ring Resources in 1992.

In 1996, Erin Ventures conducted 11.2 kilometres of VLF-EM surveys on the North Dick Creek Target; a total of 77 soil and 2 rock samples were taken. A VLF-EM and soil grid were completed in an area previously referred to as Helicopter Borne VLF anomaly XVI, which outlined an area at least 60 metres wide by 365 metres long with copper-in-soils up to 8510 parts per million and gold-in-soils up to 430 parts per billion. This area was referred to as the North Dick Creek. On the Dick Creek and East Dick Creek occurrences, drill sites were prepared to test the best conductive and geochemical anomalies but mechanical failures allowed for only 21 metres of drilling in four months.

The Cop 1-4 claims held by P. Sorbara were allowed to lapse in April 2001.

In March 2002, the Copper Creek 1 and 2 claims were staked on behalf of D. Mehner, A. Travis and D. Barker. In February 2003, the Copper Creek claims were optioned to Firesteel Resources Inc. In October 2003, Firesteel Resources focused on a small portion of the property near the Dick Creek showing (104J 035) and work consisted of 10.5 line-kilometres of IP and magnetometer surveying and the collection of 460 soil geochemical samples along with partial re-sampling of two old (1977) trenches (25 chip samples) that had never been continuously sampled for gold. Sampling of trenches yielded up to 0.35 per cent copper and 0.32 gram per tonne gold over 40 metres in trench CC-TR-2003-1 (Caron, L. (2013-07-16): National Instrument 43-101 Technical Report on the Sheslay Property).

In 2004, Firesteel Resources carried out a program of geological mapping, backhoe trenching totalling 500 metres, soil geochemistry and 1555 metres of diamond drilling in 12 holes on the Copper Creek property focusing on the DK zone (104J 035). The best hole of the program, CUCR 04-05, was angled to the north and cut 0.44 per cent copper and 0.32 gram per tonne gold averaged over its full length of 242 metres, the top 52.3 metres of the hole averaged 0.80 per cent copper and 0.73 gram per tonne gold (Exploration and Mining in British Columbia 2004, page 27). Quartz stockwork with chalcopyrite more abundant than pyrite, is developed across the intensely fractured intrusive contact over an area that now measures 500 by 500 metres in plan and 250 metres deep. Secondary copper minerals (malachite, azurite and sooty chalcocite) predominate in the upper 30-60 metres from the surface. Supergene copper enrichment is evident from assay data of some holes. Trenching over an area of approximately 300 by 400 metres yielded up to 0.37 per cent copper and 0.23 gram per tonne gold over 270 metres, including 0.51 per cent copper and 0.25 gram per tonne gold over 138 metres from the Upper Main trench (Caron, L. (2013-07-16): National Instrument 43-101 Technical Report on the Sheslay Property).

Further programs of diamond drilling were performed in 2005 and 2007 yielding intercepts of up to 0.44 per cent copper and 0.25 gram per tonne gold over 142.08 metres in hole CC2005-09, 0.41 per cent copper and 0.19 gram per tonne gold over 229.17 metres in hole CC2007-04 and 0.35 per cent copper and 0.17 gram per tonne gold over 334.67 metres in hole CC2007-01 (Caron, L. (2013-07-16): National Instrument 43-101 Technical Report on the Sheslay Property). Holes CC2004-7, CC2007-1 and CC2007-4 are the deepest tests of mineralization, bottoming in mineralization at elevations of 782, 842 and 846 metres, respectively.

In 2007 and 2008, Firesteel Resources Inc. reviewed drill core and geologically logged holes CC2007-03 and CC2007-02 ext 3.

In 2011, Firesteel Resources Ltd. conducted an exploration program which comprised drilling short localized holes for sampling using a small backpack drill, in conjunction with prospecting/mapping of the same areas. A total of 19 prospecting samples and 17 AQ drill core samples were taken for analyses. In addition, detailed geologic mapping was carried out in two areas identified by the co-­occurrence of magnetic, induced polarization chargeability, and soil sampling highs in the Star target area; 98 rock grab samples were also taken. Rock sampling yielded values of up to 0.13 and 0.73 gram per tonne gold with 8.22 and 2.33 per cent copper, respectively in samples E5216718 and E5216771 from the Dick Creek zone, 0.13 gram per tonne gold, 17.20 per cent copper (sample E5216749) from the Dick Creek South zone, 0.19 gram per tonne gold and 1.31 per cent copper (sample E5216755) from the Dick Creek South East zone, 0.50 gram per tonne gold and 2.75 per cent copper (sample E5216811) from the Dick Creek South West zone and 1.38 per cent copper (sample 132502) from the Dick Creek North zone (Caron, L. (2013-07-16): National Instrument 43-101 Technical Report on the Sheslay Property).

In 2013 the property was optioned to Prosper Gold Corp. Soil geochemical surveys were completed over the Star (formerly Dick Creek) and Copper Creek target areas. Re-logging of all historic core was completed. Prosper completed 2339.77metres of diamond drilling in six holes, a 1462 line-km multi-parameter airborne geophysical survey, a 30.4 line-km induced polarization and resistivity survey. Two soil geochemical surveys programs were conducted, one consisting of 2554 soil samples (100 line spacing) covering the Star, Start East, Star North, and Copper Creek target areas, covering approximately 7.0 kilometres by 3.0 kilometers; and a 979 sample soil geochemical survey over the Pyrrhotite Creek occurrence at 50 metres intervals along uncut 100 metre-spaced lines.

The 2013 Star-Copper Creek soil survey resulted in the confirmation of the 4 previously identified soil anomalies by Firesteel Resources (Star, Star East, Star West, and Copper Creek) as well as identifying new areas of anomalous silver, molybdenum, zinc and lead. The program also defined a faint north-south copper in soil anomaly which appears to connect the Star East and Star North targets more so than previous surveys results. All six of the 2013 drill holes returned significant intersections of copper-gold mineralization and successfully verified previously reported grades. In addition, one of the drill holes, S027, confirmed that the mineralized porphyry copper-gold system extends to at least 600 metres below surface. The best intersection of the 2013 campaign was from hole S025; it averaged 0.42 per cent copper, 0.198 gram per tonne gold and 0.61 gram per tonne silver over 269 metres (Assessment Report 34836). The 2013 airborne geophysical survey covered the entire Star property. It was reported to have clearly defined the Upper Triassic Stuhini volcanic basement from the Miocene Level Mountain volcanics to the north. The survey also defined several pronounced linear features that run northwest-southeast across the Star target area. The induced polarization survey confirmed historical survey results and identified considerable chargeability anomalies, ranging from 35 to 50mV, that coincide with the Star, Star North and Star East targets; the Copper Creek prospect was also surveyed.

The majority of Prosper Gold's 2014 exploration program focused on the Star deposit (104J 035). Twenty diamond drill holes (of 24) totalling 6,661.5 metres were completed on the Star target. Twenty diamond drill holes totalling 6,661.5 metres were completed on the Star target. Drilling occurred with a 450 metres by 550 metres area to assess the extent of the Star deposit and ranged from 119 metres to 664 metres in depth. 2014 drilling primarily focused on the Star target and intersected multiple significant intercepts resulting in the deposit being extended laterally and to depth. Drill results from the 2014 drilling program confirm the deposit remains open to the north, west,northwest, northeast and to depth. In 2014, 19 person-days spent mapping and prospecting the Star North and Star East targets to follow up on previous work, examine geophysical and geochemical anomalies, and enhance geologic knowledge.

Bibliography
EMPR EXPL 1976-E193; 1977-E234,E235; 2003-2,4; 2004-27; 2005-30
EMPR FIELDWORK 1974, p. 63; 1977, pp. 69,70
EMPR PF (Claim map (1976); 104J General File - Claim maps 73M, 73 M-1, Dec. 1970)
EMPR GEOLOGY *1977-1981, pp. 175-180
EMPR OF 1996-11
GSC OF 707
GSC BULL 504
GSC MAP 9-1957; 21-1962; 1418A; 1712A; 1713A
GSC SUM RPT 1925, Part A, pp. 33A-99A
GCNL #184(Sept.24),#226(Nov.25), 1976; #225(Nov.23), 1978; #132(Jul.9), 1980; #53(Mar.18), 1981; #143(Jul.27), 1982
PR REL Zappa Resources Aug.3, 2004; Firesteel Resources Inc., Apr.10, Nov.7, 2003; Jun.8, Jul.20,28, Sept.9, Oct.12,27, Nov.1,24, Dec.1, 2004; Jun.3, 2005; Dec.*11, 2006; Nov.*24, 2010; Sep.19, 2011; Jan.*30 2012; Prosper Gold Corp. Sep.*3,*18,*30, Oct.*29, 2013; Sep.*23, Oct.*22, 2014; Feb.*24 2015
N MINER June 10,27, 2005; Feb.20, 2014
WWW http://www.firesteeleresources.com; www.prospergoldcorp.com
*Caron, L. (2013-07-16): National Instrument 43-101 Technical Report on the Sheslay Property

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