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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  19-Sep-12 by Sarah Meredith-Jones(SMJ)

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NMI 082M8 Zn1,Au1
Name J & L, MCKINNON CREEK, VIEW FRACTION, RAINDOR, 98, ANNIE M, GOAT (L.14821), EQUINOX, YELLOWJACKET, J&L, N.W. EXTENSION Mining Division Revelstoke
BCGS Map 082M030
Status Developed Prospect NTS Map 082M08E
Latitude 51º 17' 10" N UTM 11 (NAD 83)
Longitude 118º 07' 19" W Northing 5682240
Easting 421760
Commodities Gold, Silver, Zinc, Lead, Arsenic, Antimony Deposit Types E13 : Irish-type carbonate-hosted Zn-Pb
E14 : Sedimentary exhalative Zn-Pb-Ag
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Kootenay
Capsule Geology

The J & L property is located at the confluence of Carnes and Mckinnon creeks. Prior exploration work between 1983 and 1993 was directed towards the exploration for gold, and was conducted by Pan American Minerals, BP Selco, Equinox Resources Ltd., and Cheni Gold Mines Inc. In 1997, Weymin Mining Corporation issued a prospectus on the J & L property. The J & L adits are located at 830 metres and 986 metres elevation and are accessible by road and trail, respectively.

The J & L property lies near the north end of the Kootenay Arc, a northerly trending belt of Late Proterozoic to Late Paleozoic metasedimentary and metavolcanic rocks that are characterized by tight to isoclinal folds and generally west verging thrust faults. Lowermost within this assemblage is the Hadrynian Horsethief Creek Group (Windermere Supergroup), which is overlain by a Hadrynian to Lower Cambrian succession that includes the Hamill Group, the Mohican Formation, the Badshot Formation and the Lower Cambrian and younger Lardeau Group. The Hamill Group is the host to sulphide mineralization at J & L.

Structurally the area has undergone at least two phases of folding. The earliest phase was pre to synregional metamorphism and formed large nappe-like structures overturned to the southwest, with second phase tight to isoclinal folds developed in the overturned limbs.

The main zones of mineralization on the J & L property are hosted by Hamill Group metasedimentary and metavolcanic rocks. These rocks are interlayered, or in possible fault contact elsewhere on the property, with the Early Cambrian Mohican and Badshot formations and the Lower and Upper Index formations of the Cambrian and younger Lardeau Group. Minor diorite, lamprophyre and amphibolite intrusive rocks are also present.

The Hamill Group consists of impure quartzites, limestone, phyllites, chloritic and sericitic quartz-mica schists, minor chert and graphitic schists. Chloritic and sericitic phyllites are developed throughout the sequence and constitute the bulk of the lithologic sequence hosting the deposit. They are gradational in composition both laterally and vertically from chlorite-rich to sericite-rich, making subdivision difficult. Quartz-rich and quartz-poor mica schists are also highly variable in composition and are prominent in the hanging wall. Sericite and quartz-sericite schists are associated with most mineralized zones. Iron staining is common in sections adjacent to mineralization and forms a narrow alteration envelope with sericite, chlorite and sulphides.

A typical section in the footwall of the main sulphide zone comprises quartz-chlorite and quartz-sericite phyllites and schists, quartzites and limestone. In the immediate footwall of the massive sulphides, the quartzites and pelitic rocks are usually overlain by two distinct carbonate units. The lower unit is a massive banded medium to dark grey limestone, which ranges in thickness from a few metres to more than 20 metres and contains little or no mineralization. It is overlain by a dark grey graphitic or carbonaceous limestone, which averages between 1 and 2 metres in thickness and contains discontinuous wispy laminations of yellowish brown crystalline sphalerite. The unit is locally silicified, has a cherty texture and is commonly cut by irregular and deformed carbonate veins and minor quartz veinlets, which may also transect the adjacent massive sulphides.

In the hanging wall, the sulphide body is normally in contact with sulphide-rich sericitic schists or phyllites of variable thickness; locally it may contact sphalerite-pyrite bearing carbonaceous limestone. Further into the hanging wall, quartzite or micaceous rocks may be interlayered with minor limestone and disseminated sulphides, which gradually decrease in abundance, giving way to phyllitic rocks with only trace amounts of disseminated pyrite.

The rocks within the main zone of the deposit are extensively deformed. They generally strike northwesterly 320-325 degrees, with an average dip of about 55 degrees to the northeast. The entire sequence is strongly to intensely sheared and most individual units are transposed. Sulphides exhibit sheared, cataclastic and weak mylonitic textures. Detailed underground mapping suggests that four or possibly five phases of deformation have affected the main zone sulphide sequence. The most prominent folds are tight to isoclinal, generally upright, with variable plunges trending northwesterly, parallel to regional structural trends. Stratigraphic and structural studies of the main zone suggest that the deposit has a moderate plunge to the southeast.

The J & L deposit is stratiform and generally conforms to the host stratigraphy, which strikes northwest and dips about 55 degrees east. The Main zone, which lies south of McKinnon Creek, has been traced on surface for approximately 1.85 kilometres and over 800 metres underground, and has an average true width of 1.6 metres. Forty sulphide occurrences containing arsenopyrite and pyrite, with variable amounts of zinc and lead, occur on the north side of McKinnon Creek and form the North zone in 4 parallel subzones. This zone was traced 1.54 kilometres along strike northwest of the Main zone and is possibly an extension of the Main zone.

The Main zone is a complex tabular or sheet-like body that tends to follow the limestone-phyllite/schist contact and, in places, splits into multiple semiparallel sheets or branches. The most abundant metallic minerals in the zone include pyrite, arsenopyrite, sphalerite and galena, with lesser amounts of chalcopyrite, pyrrhotite, tetrahedrite, silver-lead-antimony sulphosalts and lead-antimony sulphosalts.

The deposit consists of nearly continuous, but structurally deformed zones of massive sulphides, flanked or locally enveloped by disseminated and stringer sulphide zones, which are most prominent in the hanging wall. The lowermost section of sulphides usually forms a sharp contact with the footwall limestone. Massive sulphide sections vary, from pyrite and arsenopyrite rich to sphalerite +/- galena rich. Increasing sphalerite usually coincides with a notable decrease in arsenopyrite. Sulphide content and composition is highly variable laterally and vertically, with massive, banded and disseminated zones of contrasting composition being complexly interleaved or interfingered, possibly due to shearing. The overall thickness of the sulphide zone tends to follow the thickness of the footwall carbonaceous limestone, such that the thickness of the zone increases with increased thickness of the limestone and is usually accompanied with increases in sphalerite and galena content.

Detailed studies generally indicate that the lowermost massive zone tends to be pyrite-rich, with or without arsenopyrite and sphalerite, and has a weakly to moderately developed banded texture. It is overlain by a gold-rich arsenopyrite-pyrite zone, with laminated sphalerite +/- galena, progressing upwards to a "disseminated" sulphide zone with laminated or intrafolial sphalerite and arsenopyrite. Hanging wall sulphides tend to be more arsenical, with arsenopyrite +/- pyrite exhibiting a coarse grained, "milled", mylonitic texture near the zone margins. Laterally, some zones are sphalerite-rich, arsenopyrite (and gold)-poor and vice-versa. In sections where there are overlying massive sulphide layers, they are commonly separated by up to 10 metres of sericitic schist, that is rich in disseminated sulphides. Although they tend to be restricted in size, some hanging wall disseminated zones are zinc-rich, low in arsenopyrite and may be sufficiently concentrated, in places, to be classed as ore grade material.

Analytical data indicate that gold is most strongly associated with arsenopyrite and silver occurs with galena.

The following reserves, published in a prospectus by Weymin Mining Corporation dated February 27, 1997, are reported to be the most up-to-date and had as their source two Equinox Resources Ltd. exploration program reports from 1991. The indicated (proven and probable) resource in the Main zone is 1,700,000 tonnes grading 2.64 per cent lead, 4.43 per cent zinc, 7.38 grams per tonne gold and 75.9 grams per tonne silver. The inferred (possible) resource in the Main zone is 1,907,000 tonnes grading 7.12 grams per tonne gold, 85.5 grams per tonne silver, 3.32 per cent lead and 3.48 per cent zinc. Total for the Main zone is 3,607,000 tonnes grading 7.24 grams per tonne gold, 81.0 grams per tonne silver, 3.00 per cent lead and 3.93 per cent zinc (WWW http://www.weymin.com/projects.htm). The indicated (probable) resource in the Yellowjacket zone 693,000 tonnes grading 52.3 grams per tonne silver, 2.45 per cent lead and 7.06 zinc. The inferred (possible) resource for the Yellowjacket zone is reported at 337,000 tonnes grading 53.1 grams per tonne silver, 2.5 per cent lead and 7.15 per cent zinc. Total for the Yellowjacket zone is 1,030,000 tonnes grading 52.5 grams per tonne silver, 2.47 per cent lead and 7.09 per cent zinc. The lead-zinc-silver mineralization at the Yellowjacket zone is hosted in a quartzite/limestone sequence and differs from the Main zone in that it contains no arsenic.

Extensive and intense deformation of the J & L deposit has distorted or destroyed most original ore textures and ore-wallrock relationships. Most textures now observed result from an overprinted tectonic fabric, making interpretation of the timing and environment of deposition difficult, at best. There are two schools of thought on the deposit classification. Early interpretations classed the deposit as an epigenetic shear zone replacement, or vein deposit. Other proponents support a syngenetic sedimentary-exhalative origin. The deposit exhibits characteristics of both models and the dispute continues.

The J & L area has undergone a long history of exploration dating back to 1865. The main J & L zone was discovered in 1912 and development to date over several work periods includes approximately 1900 metres of underground drifts, crosscuts, raises and shafts. Several bulk samples have also been extracted for metallurgical testing and pilot milling in order to resolve the problems due to the high arsenical content of the ore.

Prior exploration work between 1983 and 1993 was directed towards the exploration for gold, and was conducted by Pan American Minerals, BP Selco, Equinox Resources Ltd., and Cheni Gold Mines Inc. In 1997, Weymin Mining Corporation issued a prospectus on the J & L property. They drilled 3 holes totalling 503 metres, to expand the Yellowjacket and Main zones. A June 11, 1998 press release describes metallurgical test results on a bulk sample (GCNL #115(June 16), 1998).

The deposit was acquired by BacTech Mining Corp in late 2003. In 2004 the company began a $1.6 million pre-feasibility study involving underground drilling and collection of a 5-tonne bulk sample from underground which was subsequently sent to Process Research Associates in Vancouver for metallurgical evaluation. The overall goal was to advance the project towards a production decision. In 2005, a large program of drilling and metallurgical studies was expected to be completed on the deposit; however, financial problems with BacTech Mining Corp caused the cessation of work early in the year. In December 2004, BacTech announced that, at this time, it would not exercise its option to acquire the McKinnon Creek project. The option expired on December 15, 2004. However, the Property's owners agreed that BacTech could complete its exploration program and continue to assess the Property.

In 2007 Huakan International Mining Inc. acquired the J&L project.

In September 2012 Huakan released an updated resource estimate (Huakan Internation Mining Inc Press Release, September 18, 2012):
--------------------------------------------------------------------------------
Au Au Ag Ag Pb Zn
Classification Tonnes (g/t) (oz) (g/t) (oz) (%) (%)

Main zone
Measured 1,313,000 6.37 268,800 65.1 2,747,000 2.26 4.22
Indicated 2,640,000 5.34 453,200 52.2 4,432,000 1.78 3.23
Measured and indicated 3,953,000 5.68 722,000 56.5 7,179,000 1.94 3.56
Inferred 4,337,000 4.16 580,200 57.8 8,057,000 1.82 2.72
Footwall zone
Inferred 363,000 3.65 42,500 25.4 296,000 0.55 0.51
Yellowjacket zone
Indicated 1,003,000 0.21 6,900 64.1 2,068,000 2.77 9.08
Inferred 35,000 0.35 400 81.9 91,000 3.18 6.26
--------------------------------------------------------------------------------

Bibliography
EMPR AR 1905-148,150; 1912-144; 1915-117; 1916-193; 1922-215; 1923-232; 1924-204; 1925-258; 1926-269; 1927-290; 1946-174; 1965-204; 1966-227
EMPR ASS RPT 10664, *10939, *12616, 12634, *14405, 19469, 20716
EMPR BULL 1, p. 119
EMPR EXPL 1982-118; 1983-162, xxxii; 1986-C121; *1989-81-89; 1997-39-40; 1998-64; 2004-60; 2005-62
EMPR FIELDWORK *1984, pp. 101-104
EMPR INF CIRC 1985-1, p. 38; 1986-1, p. 52; 1999-1, pp. 5-6, 11
EMPR MAP 65 (1989)
EMPR OF 1992-1; 1998-10; 1999-2; 1999-14; 2000-22
EMPR PF (Starr, C.C. (1925): Report of Preliminary Examination of the J. and L. Mine, 8 p.; Starr, C.C. (1928): Report of Examination of the J&L Mine, 7 p.; Letter to Frank Eichelbergen, 1930; Sketch Map of J. and L. Group, 1925; *Kidd, D.F. (1942): Report on the J & L Property, Carnes Creek Revelstoke Mining Division, British Columbia, unpublished report; Hopkins, P.E. (1929): Report on J & L Property, Carnes Creek Revelstoke Mining Division, unpublished report; Starr, C.C. (1928): Report of Examination of the J & L Mine, Revelstoke, B.C., unpublished report; BP-Selco-Pan American Report, 1985; Starr, C.C. (1926): Preliminary Report on J & L Property, Carnes Creek, unpublished report; Info-Data News, p. 4, Vol. 1, No. 7, April 1993; Weymin Mining Corporation, Prospectus, February 27, 1997; 1990 Snapshot Review Form; Notes from MEG talk, Mar.21, 1984; Hoy, T. (undated): J & L, A stratabound gold-arsenic deposit, southeastern British Columbia; Weymin Mining Corporation Website (Apr. 1998): McKinnon Creek Project, 5 p.; Timmins, W.G. (1979): Geological Report on the J & L Property; Wright, J.H., Weicker, R. (June 19, 1989): Completion report on Phase 1 exploration program, J & L Property, British Columbia for Equinox Resources, 50 pages, maps and appendices - 1 cerlox book; Pegg, R. (December 1985): A summary report on the J & L mineral option, lead-zinc-gold-silver prospect, British Columbia, NTS: 082M/8E for Selco Division - B.P. Resources Limited, 55 pages and plans - 1 cerlox book; Pegg, R. and Grant, B. (February 27, 1985): A summary report on the J & L mineral option, lead-zinc-gold-silver prospect, British Columbia, NTS: 082M/8E for Selco Division - BP Resources Canada Limited, 66 pages, plates, appendices and plans - 4 cerlox books; Pegg, R. and Grant, B. (March 1984): A summary report on the J & L mineral option, lead-zinc-gold-silver prospect, British Columbia, NTS: 082M/8E for Selco - BP Exploration Canada Limited, 72 pages, plates, appendices and plans - 6 cerlox books; Pegg, R. (January 1983): A summary report on the J & L mineral option, lead-zinc-gold-silver prospect, Revelstoke Mining Division, British Columbia, NTS: 082M/8E for Selco Inc., 160 pages, plates, appendices and maps - 2 cerlox books)
EMR MIN BULL MR 223 B.C. 75
EMR MP CORPFILE (Porcupine Goldfields Development and Finance Co.; Raindor Gold Mines Ltd.; Consolidated Raindor Mines Limited; Westairs Mines Limited; Quebec Gold Mining Corporation; Pan American Energy Corporation; BP Canada Inc.)
GSC EC GEOL 4, pp. 77-79
GSC MAP 7219G; 12-1964
GSC P *64-32, pp. 30-31
GSC SUM RPT 1928 Part A, pp. 165-171
CANMET IR 1926, No.243, pp. 13-15
CIM District 6 Meeting - Kamloops, (*Grant, B. (1984): The J & L Deposit, Abstract, p. 23)
GCNL Mar.17, 1981; Apr.14, 1982; Feb.17, 1983; Jan.18, July 10, Sept.10, Nov.26, 1984; Feb.21, July 30, 1985; #206, 1988; #16,#36,#51(Mar.14),#60,#111,#167,#64(Apr.4), 1989; #25(Feb.5), #171,#192(Oct.3),#218,#232(Nov.30),#236(Dec.6), 1990; #8(Jan.11), #23(Feb.1),#47(Mar.7),#65(Apr.4),#66,#98(May22),#147(Jul.31), #212(Nov.4), 1991; #32(Feb.14), 1992; #64(Apr.3), #135(Jul.15), #198(Oct.15), #221(Nov.18), #229(Nov.28), 1997; #16(Jan.23), #115(June 16), #208(Oct.29), 1998; #71(Apr.14), 1999
MIN REV May/June 1984: Selco Division of BP Explorations of Canada Limited, p. 82
N MINER Apr.29, 1982; Sept.1, 1983; Jan.26, Dec.6, 1984; Feb.28, Mar.14, 1985; Feb.13, Apr.10, Sept.11, 1989; Oct.15, Dec.10, 1990; Jan.21, Mar.25, Apr.8, Aug.5, 1991; Mar.15, 1993; May 4, 1998
PR REL Weymin Mining Corporation, Jan.20, June 11, Oct.26, 1998; BacTech Enviromet Corp, Nov.12, Dec.30, 2003; Nov.12, Dec.16, 2004
PR REL Huakan International Mining Inc., Sept.18,2012
Placer Dome File

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