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Occurrence Details


Occurrence Number
115I 038
Occurrence Name
Klazan
Occurrence Type
Hard-rock
Status
Drilled Prospect


General Information

Secondary Commodities: copper, silver, molybdenum, gold
Aliases: Nitro
Deposit Type(s): Porphyry Cu-Mo-Au
Location(s): 62.380560 N, -137.4925 W
NTS Mapsheet(s): 115I06
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

Discovered in 1965 during reconnaissance geochemical program and staked as Klazan cl (Y8375) in July 1966 by Coranex L (Frobex L, Inco, Dome EL, Denison ML, and McIntyre Porcupine ML), which explored with a geochemical survey and mapping in 1966 and bulldozer trenching in 1968. Optioned in 1970 by a joint venture between Atlas EL and Caltor Synd (Rayrock ML; Can Industrial G OL; Ashland O Can L), which conducted grid soil sampling, a ground magnetic survey, bulldozer trenching and 966.5 m of drilling in 5 holes later in the year before dropping the option. Klotassin JV (Newconex Can EL, Marietta Res Int L, and Molybdenum Corp of America) tied on 200 Roc & Jen cl (Y91802) in December 1974 and Skunk cl (YA4049) in December 1975 to the northwest and southeast and performed mapping, geochemical surveys and a magnetic survey in 1975 and 1976.

Re-staked as Nitro cl 1-24 (YA60232) in June 1981 by Nat Joint Venture (Armco Mineral Exploration Ltd. and Chevron Canada Ltd.), which performed mapping and geochemical sampling in 1981 and 1982. In June 1985, the Freegold Venture staked Nitro cl 25-50 (YA87375) to the west and north and carried out geochemical soil sampling of the newly staked claims later in the year. Chevron optioned the property in 1987 to Big Creek JV (Big Creek Res L & Rexford Mls), which conducted bulldozer trenching in 1988.

Regional & Property Geology

The occurrence is partly underlain by Yukon-Tanana Terrane (YTT). The rocks of the YTT in this region consist of Early Mississippian metamorphic rocks separated into meta-sedimentary and meta-igneous suites. The meta-sedimentary suite consists of micaceous quartz-feldspar gneiss, schist and quartzite. The meta-igneous package is comprised of biotite-hornblende feldspar gneiss and coarse-grained granodiorite orthogneiss with lesser amphibolite.

The YTT basement rocks are cut by numerous plutonic and volcanic events from the Mesozoic (Allan & Friend, 2018; AR 091804), including:
1. Early Jurassic monzonite to syenite plutonic suites;
2. Mid-Cretaceous Mount Nansen Suite andesite and rhyolite tuff-breccia;
3. Mid-Cretaceous Whitehorse granodiorite;
4. Late Cretaceous Carmacks rhyodacites;
5. Late Cretaceous Casino calc-alkaline suites; and,
6. Quartz feldspar and feldspar hornblende porphyry dykes and plugs.

The Klazan occurrence is located on the south side of the Big Creek Fault and associated with a brecciated, leached, quartz-veined rhyolite surrounding a stock of altered orthoclase porphyry (AR 091438; Allan & Friend, 2018). 

Mineralization & Results

The Klazan claims were staked to cover geochemical anomalies associated with a strong gossan. Mineralization at the Klazan occurrence was noted as disseminated pyrite and occasional molybdenite, galena and sphalerite in surface trenches in the leached and gossaned rhyolite (AR 091438).

The best grade intersections reported from the 1970 drilling are 44.2 m of 0.17% Cu and 3.0 m of 0.16% Cu and 0.68% MoS2 (AR 091329).

The Klotassin JV property completely covers the parts of the valley which lie below the level of effective conventional prospecting. Mapping of rock chips collected during soil sampling outlined areas of thick alluvial overburden and delineated several small porphyry stocks and related dyke swarms. The 1981 by Nat JV sampling located a 700 by 200 m gold soil geochemical anomaly coincident with the gossan, and rock chips from the gossan returned up to 212 ppb Au. A silver soil anomaly up to 10.7 ppm Ag partly coincides with the gold anomaly (AR 091438).

 

Location Map

Last Updated: Dec 16, 2020

Work History

Year Work Type Comment
2006 Airborne Geophysics: Magnetic Regional property survey.
2006 Airborne Geophysics: VTEM Regional property survey.
1988 Trenching: Mechanical
1985 Geochemistry: Soil Also rock sampling.
1985 Geology: Bedrock Mapping
1982 Geology: Bedrock Mapping
1982 Other: Prospecting
1982 Geochemistry: Soil
1981 Geochemistry: Soil
1981 Geology: Regional Bedrock Mapping
1976 Ground Geophysics: Magnetics
1976 Geochemistry: Rock
1976 Geochemistry: Soil
1975 Geochemistry: Soil Also some rock sampling.
1975 Geology: Bedrock Mapping
1975 Ground Geophysics: Magnetics
1970 Drilling: Diamond Five holes, 966.52 m.
1970 Geochemistry: Soil
1970 Ground Geophysics: Magnetics
1970 Trenching: Mechanical
1968 Trenching: Mechanical
1966 Geochemistry: Soil Also rock and additional silt sampling.
1966 Geology: Bedrock Mapping
1966 Other: Prospecting
1965 Geochemistry: Silt Regional silt sampling program.

Regional Geology - Terrane

Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian


Regional Geology - Bedrock

Supergroup:
Group/Suite: Whitehorse
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 112 MA
Period Min: Cretaceous
Age Min: 100 MA
Rock Major: quart feldspar porphyry/feldspar hornblende porphyry
Rock Minor:
Reference: Eaton (1982) - Yukon Assessment Report 091438
Geological Unit (1M): mKW
Geological Unit (250K): mKfW

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
094745 2006 2006 Geophysical Assessment Report on the Freegold Mountain Property Electromagnetic Airborne Geophysics, Magnetic Airborne Geophysics
093152 1993 Linecutting Report Patriot Resources Ltd. Cash Property - Nitro Property Line Cutting Other
091819 1985 Geological and Geochemical Reports on the NITRO Property Rock Geochemistry, Soil Geochemistry, Bedrock Mapping Geology
091804 1985 Geological and Geochemical Report on the NUCLEUS Property Rock Geochemistry, Soil Geochemistry, Bedrock Mapping Geology, Property Evaluation Other, Prospecting Other, Mechanical Trenching
090974 1981 Nat Joint Venture Geological, Geochemical Report Nitro 1-24 Claims Rock Geochemistry, Silt Geochemistry, Soil Geochemistry, Bedrock Mapping Geology, Data Compilation Pre-existing Data
091329 1970 Geological, Geochemical, Geophysical and Diamond Drilling Report on The Klazan Group Diamond Drilling, Rock Geochemistry, Silt Geochemistry, Soil Geochemistry, Water Geochemistry, Detailed Bedrock Mapping Geology, Magnetics Ground Geophysics, Mechanical Trenching 5 966.52
060199 1970 Geological, Geochemical, Geophysical and Diamond Drilling Report on the Klazan Group Diamond Drilling, Rock Geochemistry, Silt Geochemistry, Soil Geochemistry, Water Geochemistry, Detailed Bedrock Mapping Geology, Magnetics Ground Geophysics, Mechanical Trenching 5 966.52
019096 1967 Klazan Group - Geochemical Report Silt Geochemistry, Soil Geochemistry, Bedrock Mapping Geology
019095 1966 Klazan Group - Geochemical Report Soil Geochemistry, Detailed Bedrock Mapping Geology, Hand Trenching

Related References

Number Title Page(s) Document Type
ARMC012920 Report - Klazan project Report
ARMC012924 Report on Klazan group, Yukon Territory Report
ARMC012935 GSC annual report - Klazan group - Claims 1 to 48, 55 to 136 Report
ARMC012917 Geological map - Klazan group - Coranex project - Figure 5 Geochemical Map
ARMC012916 Mo geochemistry - Total molybdenum in soils - Klazan group - Coranex Project - Figure 8 Geochemical Map
ARMC012922 Interim progress report to May 10, 1970 - Victor project - Klazan group Report
ARMC012926 Rock and soil geochemistry - Arsenic-zinc - Klazan group Geochemical Map
ARMC012932 Rock and soil geochemistry - Copper-molybdenum - Klazan group Geochemical Map
ARMC012928 Rock and soil geochemistry - Copper-molybdenum - S.E. side Burgis Creek Valley - Klazan group Geochemical Map
ARMC012931 Rock and soil geochemistry - Sample no. - Klazan group Geochemical Map
ARMC012927 Rock and soil geochemistry - Sample numbers - S.E. side Burgis Creek Valley - Klazan group Geochemical Map
ARMC012929 Rock and soil geochemistry - Silver-lead - Klazan group Geochemical Map
ARMC012919 Klazan project - Annual report Report
ARMC012930 Rock and soil geochemistry - SIlver-lead - S.E. side Burgis Creek Valley - Klazan group Geochemical Map
ARMC012915 Rock and soil geochemistry - Zinc - S.E. side Burgis Creek Valley - Klazan group Geochemical Map
ARMC012925 Rock geochemistry - Total molybdenum in rock - Klazan group - Coranex project - Figure 7 Geochemical Map
ARMC012923 Progress report for the month of April - Victor project - Klazan group Report
ARMC012914 Diamond drilling report on the Klazan group - Big Creek area, Yukon Territory - May 1 to June 10, 1970 Report
ARMC012918 Alteration map - Klazan group - Coranex project - Figure 6 Geoscience Map (Geological - Bedrock)
ARMC012934 Geology and geochemistry - Klazan group Geochemical Map
ARMC012933 Geology and geochemistry - Klazan group - Figure 3 Geochemical Map
ARMC012939 Field sheet - Yukon River area with geology - Klazan, Johnny and Cash claims Geoscience Map (Geological - Bedrock)
094745 2006 Geophysical Assessment Report on the Freegold Mountain Property Assessment Report
091438 Nat Joint Venture Geological, and Geochemical Report Nitro 1-24 Claims Assessment Report
090167 Geological Mapping, Geochemical and Magnetometer Surveys May-August, 1976 Skunk 1-75 Mineral Claims Assessment Report
019095 Klazan Group - Geochemical Report Assessment Report
019096 Klazan Group - Geochemical Report Assessment Report
2018-2 Bedrock geological map of the Mount Freegold district, Dawson Range Open File (Geological - Bedrock)
090087 Geological Mapping, Geochemical and Magnetometer Surveys - Big Creek West, Big Creek East, Bow Creek Properties Assessment Report
091329 Geological, Geochemical, Geophysical and Diamond Drilling Report on The Klazan Group Assessment Report
091819 Geological and Geochemical Reports on the NITRO Property Assessment Report
YEG2017_4 New contributions to the bedrock geology of the Mount Freegold district, Dawson Range, Yukon (NTS 115I/2, 6 and 7) Annual Report Paper
090974 Nat Joint Venture Geological, Geochemical Report Nitro 1-24 Claims Assessment Report
060199 Geological, Geochemical, Geophysical and Diamond Drilling Report on the Klazan Group Assessment Report
Citations

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