General Information
Secondary Commodities: arsenic, gold, silver
Deposit Type(s): Vein Polymetallic Ag-Pb-Zn+/-Au
Location(s): 60.946110 N, -133.73 W
NTS Mapsheet(s): 105C13
Location Comments: 1 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Saw cl 1-6 (YA95225) in Jul/66 by Noranda Exploration Company Ltd, which carried out a small reconnaissance sampling program later in the month. All North Resources Ltd staked Was cl 1-6 (YA95295) approximately 2 km to the southwest in the same month. Both companies carried out geological maping and geochemical sampling programs in 1987.
Restaked as Rosy cl 1-20 (YC18054) by Atac Resources Ltd in Jul/99, which carried out a brief prospecting and soil sampling program before adding Rosy cl 21-30 (YC18159) in Sep/99. Atac carried out follow-up exploration work in late Sept/99.
Capsule Geology
The area is located northwest of the Canol Road and was previously assigned to the Big Salmon Complex. Recent mapping by Gordey et al., 1998 shows that the area is underlain Yukon-Tanana Terrane rocks divided into three lithotectonic assemblages first suggested by Stevens (1993). The oldest consists of Early Mississippian or older metasedimentary rocks including quartz-muscovite +/- chlorite schist, muscovite-chlorite quartzite, muscovite-graphite phyllite, calcareous schist and minor marble. Intruding these strata are foliated hornblende-bearing metagranitoids of Early Mississippian age. The last assemblage consists of mafic schist, greenstone, amphibolite, and metagabbro of probable late Paleozoic age. Some maps label this unit the Amphibolite Subterrane. Inclusion of this last assemblage within the Slide Mountain terrane is also possible. Contacts between rock units are dominantly structural with rare preservation of primary depositional and intrusive relationships. Metamorphic grade is greenschist to amphibolite facies.
The occurrence is predominantly underlain by quartz-hornblende gneiss, feldspar-quartz-hornblende gneiss and amphibolite belonging tothe youngest of Gordey¿s three lithotectonic units. An Early Jurassic metadiorite intrusion, intrudes the unit. The original claims were staked to cover anomalous gold and arsenic values from a GSC silt survey. All-North noted vein quartz float assaying up to 1.3 g/t Au and 102 g/t Ag. The float was associated with a soil anomaly that returned values up to 145 ppb Au and 9.0 ppm Ag.
Noranda discovered several quartz-carbonate alteration zones thought to be related to local shear zones separating the amphibolite rocks from the metadiorite. The alteration zones are up to few metres wide but rock and soil samples returned anomalous values for Au and As.
Atac Resources identified more than twenty quartz-carbonate veins that cut the amphibolite unit and the metadiorite. The veins are typically less than 80 cm wide and are best exposed on ridge crests and cliffs. Accompaning sulfide minerals are typically fine grained and consist of disseminated pyrite with minor arsenopyrite and rarely comprise more than 5% of the veins. A grab sample of one quartz-carbonate vein estimated to contain 10% arsenopyrite returned 35.92 g/t Au, 32.4 ppm Ag and > 10 000 As. The highest soil sample, collected about 125 m west of the rock sample returned 835 ppb Au and 9.6 ppm Ag and 210 ppm As. Preliminary exploration suggests that the gold results are highly correlated with arsenic and weakly correlated with silver and antimony.
References
ALL-NORTH RESOURCES LTD, Dec/87. Assessment Report #091975 by T. Garagan and P Garagan.
ATAC RESOURCES LTD, May/2000. Assessment Report #094109 by W.D. Eaton.
ATAC RESOURCES LTD, Mar/2003. Web Site: www.atacres.com/
GORDEY, S.P. AND STEVENS, R.A., 1994. Preliminary interpretation of bedrock geology of the Teslin Area (105C), southern Yukon: Geological Survey of Canada Open File 2886 (map, scale 1:250 000).
GORDEY, S.P. ET AL., New U-Pb ages from the Teslin area, southern Yukon, and their bearing on terrane evolution in the northern Cordillera; in Radiogenic Age and Isotopic Studies: Report 11; Geological Survey of Canada, Current Research 1998-F, p 129-148.
NORANDA EXPLORATION COMPANT LTD, Oct/87. Assessment Report #091956 by H. Copland.
NORANDA EXPLORATION COMPANT LTD, Jun/88. Assessment Report #092484 by M. Trudzik.
STEVENS, R. A., 1993: Teslin suture zone; in Field Guild Guide to Accompany the 1993 Nuna Conference on the Northern Intermontane Superterrane, John et al. (ed.); p. 44-45.
YUKON EXPLORATION 1985-86, p. 144; 987, p. 89-92.
Staked as Saw cl 1-6 (YA95225) in Jul/66 by Noranda Exploration Company Ltd, which carried out a small reconnaissance sampling program later in the month. All North Resources Ltd staked Was cl 1-6 (YA95295) approximately 2 km to the southwest in the same month. Both companies carried out geological maping and geochemical sampling programs in 1987.
Restaked as Rosy cl 1-20 (YC18054) by Atac Resources Ltd in Jul/99, which carried out a brief prospecting and soil sampling program before adding Rosy cl 21-30 (YC18159) in Sep/99. Atac carried out follow-up exploration work in late Sept/99.
Capsule Geology
The area is located northwest of the Canol Road and was previously assigned to the Big Salmon Complex. Recent mapping by Gordey et al., 1998 shows that the area is underlain Yukon-Tanana Terrane rocks divided into three lithotectonic assemblages first suggested by Stevens (1993). The oldest consists of Early Mississippian or older metasedimentary rocks including quartz-muscovite +/- chlorite schist, muscovite-chlorite quartzite, muscovite-graphite phyllite, calcareous schist and minor marble. Intruding these strata are foliated hornblende-bearing metagranitoids of Early Mississippian age. The last assemblage consists of mafic schist, greenstone, amphibolite, and metagabbro of probable late Paleozoic age. Some maps label this unit the Amphibolite Subterrane. Inclusion of this last assemblage within the Slide Mountain terrane is also possible. Contacts between rock units are dominantly structural with rare preservation of primary depositional and intrusive relationships. Metamorphic grade is greenschist to amphibolite facies.
The occurrence is predominantly underlain by quartz-hornblende gneiss, feldspar-quartz-hornblende gneiss and amphibolite belonging tothe youngest of Gordey¿s three lithotectonic units. An Early Jurassic metadiorite intrusion, intrudes the unit. The original claims were staked to cover anomalous gold and arsenic values from a GSC silt survey. All-North noted vein quartz float assaying up to 1.3 g/t Au and 102 g/t Ag. The float was associated with a soil anomaly that returned values up to 145 ppb Au and 9.0 ppm Ag.
Noranda discovered several quartz-carbonate alteration zones thought to be related to local shear zones separating the amphibolite rocks from the metadiorite. The alteration zones are up to few metres wide but rock and soil samples returned anomalous values for Au and As.
Atac Resources identified more than twenty quartz-carbonate veins that cut the amphibolite unit and the metadiorite. The veins are typically less than 80 cm wide and are best exposed on ridge crests and cliffs. Accompaning sulfide minerals are typically fine grained and consist of disseminated pyrite with minor arsenopyrite and rarely comprise more than 5% of the veins. A grab sample of one quartz-carbonate vein estimated to contain 10% arsenopyrite returned 35.92 g/t Au, 32.4 ppm Ag and > 10 000 As. The highest soil sample, collected about 125 m west of the rock sample returned 835 ppb Au and 9.6 ppm Ag and 210 ppm As. Preliminary exploration suggests that the gold results are highly correlated with arsenic and weakly correlated with silver and antimony.
References
ALL-NORTH RESOURCES LTD, Dec/87. Assessment Report #091975 by T. Garagan and P Garagan.
ATAC RESOURCES LTD, May/2000. Assessment Report #094109 by W.D. Eaton.
ATAC RESOURCES LTD, Mar/2003. Web Site: www.atacres.com/
GORDEY, S.P. AND STEVENS, R.A., 1994. Preliminary interpretation of bedrock geology of the Teslin Area (105C), southern Yukon: Geological Survey of Canada Open File 2886 (map, scale 1:250 000).
GORDEY, S.P. ET AL., New U-Pb ages from the Teslin area, southern Yukon, and their bearing on terrane evolution in the northern Cordillera; in Radiogenic Age and Isotopic Studies: Report 11; Geological Survey of Canada, Current Research 1998-F, p 129-148.
NORANDA EXPLORATION COMPANT LTD, Oct/87. Assessment Report #091956 by H. Copland.
NORANDA EXPLORATION COMPANT LTD, Jun/88. Assessment Report #092484 by M. Trudzik.
STEVENS, R. A., 1993: Teslin suture zone; in Field Guild Guide to Accompany the 1993 Nuna Conference on the Northern Intermontane Superterrane, John et al. (ed.); p. 44-45.
YUKON EXPLORATION 1985-86, p. 144; 987, p. 89-92.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1999 | Geochemistry: Rock | |
| 1999 | Geochemistry: Soil | |
| 1999 | Other | Work was preliminary in nature. |
| 1987 | Geology: Bedrock Mapping | |
| 1987 | Other |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Long Lake
Formation:
Member:
Terrane:
Period Max: Jurassic
Age Max: 193 MA
Period Min: Jurassic
Age Min: 183 MA
Rock Major: granodiorite/diorite/monzodiorite
Rock Minor:
Reference: Gordey & Stevens (1994) - GSC OF 2886
Geological Unit (1M): EJL
Geological Unit (250K): EJgL
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 097096 | 2017 | Assessment report describing Soil Geochemical Sampling and Prospecting at the Rosy property | Rock - Geochemistry, Soil - Geochemistry | ||
| 095178 | 2009 | Assessment Report Describing Geochemical Sampling and Prospecting at the Rosy Property | Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology | ||
| 095191 | 2008 | Assessment Report Describing Geochemical Sampling, Geological Mapping and Prospecting | Rock - Geochemistry, Rock - Geochemistry, Soil - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Detailed Bedrock Mapping - Geology, Prospecting - Other | ||
| 095002 | 2007 | Assessment Report Describing Geophysical Surveys at the Rosy Property | Magnetic - Airborne Geophysics, VTEM - Airborne Geophysics | ||
| 094534 | 2004 | Assessment Report Describing Prospecting and Soil Geochemistry | Soil - Geochemistry, Prospecting - Other | ||
| 094109 | 2000 | Assessment Report Describing Prospecting and Soil Geochemistry on the Rosy Property | Rock - Geochemistry, Soil - Geochemistry | ||
| 091956 | 1987 | Geochemical Report on the Saw 1-6 Claims | Rock - Geochemistry, Soil - Geochemistry | ||
| 092484 | 1987 | Geological & Geochemical Report on the Saw 1-6 Claims | Silt - Geochemistry, Soil - Geochemistry, Prospecting - Other | ||
| 091380 | 1982 | 1982 Prospecting Programme Yukon Quartz Mineral Claims | Soil - Geochemistry, Prospecting - Other | ||
| 091035 | 1981 | Geochemical Report on Bear 1-56 Mineral Claims | Silt - Geochemistry, Soil - Geochemistry | ||
| 060002 | 1970 | Report on Geochemical Soil Survey, For Assessment Work Performed on Northweste Explorers (1967) Ltd. NW, RH and Xy Claims | Soil - Geochemistry, Bedrock Mapping - Geology | ||
| 060003 | 1969 | Geochemical Survey, Assessment Work Report on theNW Claim group | Silt - Geochemistry, Soil - Geochemistry |
