General Information
Secondary Commodities: beryllium, lead, molybdenum, silver, tin, tungsten
Aliases: Flo
Deposit Type(s): Vein W
Location(s): 63.266110 N, -134.701940 W
NTS Mapsheet(s): 105M07
Location Comments: .5 Kilometres
Hand Samples Available at YGS: Yes
Capsule
Work History
Staked as Pat, Blackie and David cl (YA38160) in Aug/78 by J. Randolph, who staked Wolf cl 1-4 (YA42732) contiguously to the west in Aug/80.
Late in 1980 Randolph optioned the claims to Union Carbide Canada Ltd, which staked Wolf cl 5-48 (YA62802) to surround the existing claims in Jun/81; carried out geochemical rock and soil sampling and bulk sampling from talus cones later that year; geological mapping, trenching, geochemical rock sampling and road work in 1982; staked Fram cl 1-60 (YA76897) in Mar/83 and carried out detailed geological mapping and drilled 2 holes (667.8 m) on the David claim later that year; and bulldozer trenching in 1984. Union Carbide staked Ite cl 1-31 (YA77560) to the north in Jun/84, subsequent to dropping the option later in the year.
Randolph carried out trenching on the Blackie claims in 1989, restaked the Wolf cl 5-10 (YB03686) in Jul/90 and carried out additional trenching in 1991 and 1993. By the late 1990¿s all but eight of the claims had lapsed, before they were subsequently surrounded by Class A settlement lands selected by the Selkirk First Nation.
In Jul/2001, Copper Ridge Explorations Inc optioned the claims and immediately carried out resampling of historic drill core and trenches. Copper Ridge carried out detailed geochemical rock chip sampling and geological mapping of historic trenches in 2002 and diamond drilling to test below high-grade trenches in 2005. Five holes totalling 397.4 m were drilled in 2005.
Capsule Geology
Wolframite occurs with minor scheelite, molybdenite, cassiterite, galena and beryl in a broad, sheeted vein and stockwork complex, approximately 1 000 by 500 m in size, that cuts gritty, hornfelsed Yusezyu Formation quartzite and phyllite of the Upper Proterozoic Hyland Group. Individual veins reach 60 cm in width and higher grade zones, occurring over 1 to 6 m, in competent quartzite and siliceous conglomerate have been identified.
Molybdenite, arsenopyrite, pyrrhotite and argentiferous galena occur in quartz veins peripheral to the tungsten-tin zone. Mineralogical study showed that the wolframite variety ferberite is partly replaced by ferritungstite. Veins and mineralization associated with this occurrence are undeformed and therefore post-date the effects of regional metamorphism during the Jurassic to Early Cretaceous period.
Alteration is locally intense and zoned, with four roughly concentric phases that are generally concordant with stratigraphy. The core phase or zone is characterized by K-feldspar and minor sulfides in sheeted veins and biotite in the wall rock; followed by a wolframite zone which overlaps the core and surrounding quartz-tourmaline zone; the quartz-tourmaline zone which is distinguished by the presence of tourmaline and absence of wolframite; and an outermost zone or halo of quartz-sericite-pyrite, characterized by pervasive sericitization and disseminated pyrite.
Surface sampling by Union Carbide returned average grades of 0.2 to 0.3% WO3, typically over widths of 50 to 75 m, while Copper Ridge¿s sampling demonstrated a significant increase over Union Carbide¿s results with average grades of 0.3 to 0.5% WO3, over widths up to 70 m. Sampling of higher grade zones in 2002 returned values to 1.22% to 2.55% WO3 over widths of a few meters. Drilling in 1973 confirmed the continuity of the mineralization to a depth of 300 m.
Intrusive rock is not exposed in the area, but the concentric alteration aureole, the increased intensity of alteration with depth, the prominent aeromagnetic low coincident with the occurrence and the presence of boron to form tourmaline are all suggestive of an underlying granitic body. A whole-rock K-Ar age date of 90.7 +/- 1.4 Ma from a pervasively biotitized sample (Hunt and Roddick, 1987) is consistent with the age of the Tombstone Plutonic Suite, intrusions of which have previously mapped throughout this belt of rocks.
References
CARLSON, G.C., 2002. Geology, mineralization and sampling results ofrom the Kalzas tungsten property, central Yukon. In: Yukon Exploration and Geology 2001, D.S. Emond, L.H. weston and L.L. Lewis (eds.), Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 269-278.
COPPER RIDGE EXPLORATIONS INC, News Release, 11 Jul/2001; 03 May/2005, 28 Sept/2005.
COPPER RIDGE EXPLORATIONS INC, Mar/2003. Assessment Report #094408 by G.C. Carlson.
COPPER RIDGE EXPLORATIONS INC, Jun/2005, Website: http://www.copper-ridge.com
ERCIT, T.S. and G.W. ROBINSON, 1988. Ferritungstite from Kalzas Mountain. Program with Abstracts, Geological Association of Canada Joint Annual Meeting, May/88.
GORDEY, S.P. and MAKEPEACE, A.J., 2003. Yukon Digital Geology, version 2.0, S.P Gordey and A.J. Makepeace (comp.); Geological Survey of Canada, Open File 1749 and Yukon Geological Survey, Open File 2003-9(D).
HUNT, P.A. and RODDICK, J.C., 1987. A compilation of K-Ar ages, Report 17. Radiogenic and Isotopic Studies, Report 1. Geological Survey of Canada, Paper 1987-2, p. 143-210.
LYNCH, G. 1983. Alteration and Zonation in the Kalzas W-Sn-Mo Porphyry Vein Deposit. In: Yukon Exploration and Geology 1983, Indian and Northern Affairs Canada, p. 79-87.
ROOTS, C.F., 1997a. Bedrock geology of Mayo map area, central Yukon (105M). Exploration and Geological Services Division, Indian and Northern Affairs Canada, Geoscience Map 1997-1, 1:50 000 scale.
ROOTS, C.F., 1997b. Geology of the Mayo Map Area, Yukon Territory (105M). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Bulletin 7, 82 p.
UNION CARBIDE CANADA LTD, Oct/81. Assessment Report #090878 by C.N. Forster.
UNION CARBIDE CORPORATION, Mar/84. Assessment Report #091529 by C.N. Forster.
YUKON EXPLORATION 1984, p. 123.
YUKON EXPLORATION AND GEOLOGY 1981, p. 168; 1982, p. 157; 1983, p. 208; 2001, p. 14.
Staked as Pat, Blackie and David cl (YA38160) in Aug/78 by J. Randolph, who staked Wolf cl 1-4 (YA42732) contiguously to the west in Aug/80.
Late in 1980 Randolph optioned the claims to Union Carbide Canada Ltd, which staked Wolf cl 5-48 (YA62802) to surround the existing claims in Jun/81; carried out geochemical rock and soil sampling and bulk sampling from talus cones later that year; geological mapping, trenching, geochemical rock sampling and road work in 1982; staked Fram cl 1-60 (YA76897) in Mar/83 and carried out detailed geological mapping and drilled 2 holes (667.8 m) on the David claim later that year; and bulldozer trenching in 1984. Union Carbide staked Ite cl 1-31 (YA77560) to the north in Jun/84, subsequent to dropping the option later in the year.
Randolph carried out trenching on the Blackie claims in 1989, restaked the Wolf cl 5-10 (YB03686) in Jul/90 and carried out additional trenching in 1991 and 1993. By the late 1990¿s all but eight of the claims had lapsed, before they were subsequently surrounded by Class A settlement lands selected by the Selkirk First Nation.
In Jul/2001, Copper Ridge Explorations Inc optioned the claims and immediately carried out resampling of historic drill core and trenches. Copper Ridge carried out detailed geochemical rock chip sampling and geological mapping of historic trenches in 2002 and diamond drilling to test below high-grade trenches in 2005. Five holes totalling 397.4 m were drilled in 2005.
Capsule Geology
Wolframite occurs with minor scheelite, molybdenite, cassiterite, galena and beryl in a broad, sheeted vein and stockwork complex, approximately 1 000 by 500 m in size, that cuts gritty, hornfelsed Yusezyu Formation quartzite and phyllite of the Upper Proterozoic Hyland Group. Individual veins reach 60 cm in width and higher grade zones, occurring over 1 to 6 m, in competent quartzite and siliceous conglomerate have been identified.
Molybdenite, arsenopyrite, pyrrhotite and argentiferous galena occur in quartz veins peripheral to the tungsten-tin zone. Mineralogical study showed that the wolframite variety ferberite is partly replaced by ferritungstite. Veins and mineralization associated with this occurrence are undeformed and therefore post-date the effects of regional metamorphism during the Jurassic to Early Cretaceous period.
Alteration is locally intense and zoned, with four roughly concentric phases that are generally concordant with stratigraphy. The core phase or zone is characterized by K-feldspar and minor sulfides in sheeted veins and biotite in the wall rock; followed by a wolframite zone which overlaps the core and surrounding quartz-tourmaline zone; the quartz-tourmaline zone which is distinguished by the presence of tourmaline and absence of wolframite; and an outermost zone or halo of quartz-sericite-pyrite, characterized by pervasive sericitization and disseminated pyrite.
Surface sampling by Union Carbide returned average grades of 0.2 to 0.3% WO3, typically over widths of 50 to 75 m, while Copper Ridge¿s sampling demonstrated a significant increase over Union Carbide¿s results with average grades of 0.3 to 0.5% WO3, over widths up to 70 m. Sampling of higher grade zones in 2002 returned values to 1.22% to 2.55% WO3 over widths of a few meters. Drilling in 1973 confirmed the continuity of the mineralization to a depth of 300 m.
Intrusive rock is not exposed in the area, but the concentric alteration aureole, the increased intensity of alteration with depth, the prominent aeromagnetic low coincident with the occurrence and the presence of boron to form tourmaline are all suggestive of an underlying granitic body. A whole-rock K-Ar age date of 90.7 +/- 1.4 Ma from a pervasively biotitized sample (Hunt and Roddick, 1987) is consistent with the age of the Tombstone Plutonic Suite, intrusions of which have previously mapped throughout this belt of rocks.
References
CARLSON, G.C., 2002. Geology, mineralization and sampling results ofrom the Kalzas tungsten property, central Yukon. In: Yukon Exploration and Geology 2001, D.S. Emond, L.H. weston and L.L. Lewis (eds.), Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 269-278.
COPPER RIDGE EXPLORATIONS INC, News Release, 11 Jul/2001; 03 May/2005, 28 Sept/2005.
COPPER RIDGE EXPLORATIONS INC, Mar/2003. Assessment Report #094408 by G.C. Carlson.
COPPER RIDGE EXPLORATIONS INC, Jun/2005, Website: http://www.copper-ridge.com
ERCIT, T.S. and G.W. ROBINSON, 1988. Ferritungstite from Kalzas Mountain. Program with Abstracts, Geological Association of Canada Joint Annual Meeting, May/88.
GORDEY, S.P. and MAKEPEACE, A.J., 2003. Yukon Digital Geology, version 2.0, S.P Gordey and A.J. Makepeace (comp.); Geological Survey of Canada, Open File 1749 and Yukon Geological Survey, Open File 2003-9(D).
HUNT, P.A. and RODDICK, J.C., 1987. A compilation of K-Ar ages, Report 17. Radiogenic and Isotopic Studies, Report 1. Geological Survey of Canada, Paper 1987-2, p. 143-210.
LYNCH, G. 1983. Alteration and Zonation in the Kalzas W-Sn-Mo Porphyry Vein Deposit. In: Yukon Exploration and Geology 1983, Indian and Northern Affairs Canada, p. 79-87.
ROOTS, C.F., 1997a. Bedrock geology of Mayo map area, central Yukon (105M). Exploration and Geological Services Division, Indian and Northern Affairs Canada, Geoscience Map 1997-1, 1:50 000 scale.
ROOTS, C.F., 1997b. Geology of the Mayo Map Area, Yukon Territory (105M). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Bulletin 7, 82 p.
UNION CARBIDE CANADA LTD, Oct/81. Assessment Report #090878 by C.N. Forster.
UNION CARBIDE CORPORATION, Mar/84. Assessment Report #091529 by C.N. Forster.
YUKON EXPLORATION 1984, p. 123.
YUKON EXPLORATION AND GEOLOGY 1981, p. 168; 1982, p. 157; 1983, p. 208; 2001, p. 14.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 2005 | Drilling: Diamond | Number of holes drilled: 5 Amount of work done: 397.4 METRES |
| 2002 | Geochemistry: Rock | |
| 2002 | Geology: Bedrock Mapping | |
| 2001 | Geochemistry: Rock | |
| 1993 | Trenching | |
| 1991 | Trenching | |
| 1989 | Trenching | |
| 1984 | Trenching: Mechanical | |
| 1983 | Drilling: Diamond | Number of holes drilled: 2 Amount of work done: 667.8 METRES |
| 1983 | Geology: Bedrock Mapping | |
| 1982 | Development, Surface: All Weather Road | |
| 1981 | Geology: Bedrock Mapping | |
| 1981 | Other | |
| 1981 | Trenching |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup: Windermere
Group/Suite: Hyland
Formation: Yusezyu
Member:
Terrane: Laurentia
Period Max: Ediacaran
Age Max: 635 MA
Period Min: Ediacaran
Age Min: 542 MA
Rock Major: phyllite/shale/sandstone/grit/conglomerate
Rock Minor: limestone/marble
Reference: Roots (2003) - YGS GM 2003-1; GSC OF 1616
Geological Unit (1M): PCH
Geological Unit (250K): PCH6
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 095595 | 2005 | 2005 Diamond Drilling Report on the Kalzas Tungsten Property | Diamond - Drilling, Drill Core - Geochemistry | 5 | 397.44 |
| 094408 | 2002 | Kalzas Project-Report on 2002 Field Program | Rock - Geochemistry, Bedrock Mapping - Geology, Detailed Bedrock Mapping - Geology, Mechanical - Trenching | ||
| 091529 | 1983 | [1983 Diamond Drilling Program on the David Claim] | Diamond - Drilling, Drill Core - Geochemistry | 2 | 412.39 |
| 090878 | 1981 | Assessment Report on the Geology and Geochemistry of the Wolf, David, Blackie and Pat claims-Kalzas Twins Mountain | Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Bulk Sample - Lab Work/Physical Studies, Line Cutting - Other, Prospecting - Other |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC016450 | Geochemistry map overlay of 105M/7 | Geochemical Map |
| Citations |
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