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Occurrence Details


Occurrence Number
105G 068
Occurrence Name
Ash
Occurrence Type
Hard-rock
Status
Drilled Prospect


General Information

Secondary Commodities: copper, zinc, lead
Deposit Type(s): Unknown
Location(s): 61.221390 N, -130.583060 W
NTS Mapsheet(s): 105G02
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

Staked by Atlas Explorations Ltd as Ash cl 1-36 (Y7337) in Apr/66 over a geophysical anomaly found by an airborne survey earlier in the year. Explored by ground mag & EM surveys, soil sampling and mapping later in the year. In Mar/74, L. Tyerman staked this anomaly as T & B cl (Y74555).
In July/94 Cominco Ltd covered the anomaly with the Rife cl 1-52 (YB50189) in response to anomalies resulting from a regional airborne survey conducted earlier in the year. Limited geological, geochemical and geophysical surveys were completed following the staking. In Jul/96 Cominco added Rife cl 53-92 (YB84663) to the west, conducted one day of prospecting and completed 1 diamond drill hole (130.7 m). In May/97 Cominco carried out 1.3 km of HLEM/MAG and gravity surveys on the ice at the north end of Fire Lake.

Capsule Geology

The Finlayson Lake district is underlain by the Yukon-Tanana Terrane: a Late Proterozoic to Paleozoic metamorphosed volcano-sedimentary assemblage. It is regionally bounded to the southwest by the Tintina Fault. This terrane hosts several known volcanogenic massive sulphide (VMS) deposits and occurrences, including Kudz Ze Kayah (Minfile Occurrence #105G 117), Wolverine (Minfile Occurrence #105G 072) and Ice (Minfile Occurrence #105G 118).
The anomaly occurs in an area of extensive overburden. Mapping by Murphy and Piercey (1999) suggests that the area surrounding the anomaly is underlain by unit Dq, a quartzose metaclastic unit consisting of biotite-muscovite-feldspar schist, micaceous quartzite and psammite, quartz-biotite-muscovite metapelitic schist and marble. Unit Dq is overlain by unit DMF, Fire Lake mafic metavolcanic unit, described as a thick package of massive calcareous chloritic schists and lesser carbonaceous phyllite and quartzite, serpentinized ultramafics and fine to coarse grained gabbro. Unit DMF is overlain by unit MKcp, a carbonaceous muscovite-quartz schist or phyllite and quartz-muscovite (augen) schist which is part of the Kudz Ze Kayah felsic metavolcanic unit (Murphy and Piercey, 1999 map). Devonian to Mississippian ultramafic intrusives probably intrude the northern half of the claim block. Cretaceous age, weakly foliated biotite muscovite granite may also intrude the sequence.
Mapping of ridges and exposed hill slopes by Cominco geologists revealed a sequence of mixed carbonaceous phyllite, metasedimentary schist, and an interval of mixed felsic and mafic metavolcanic rocks. These units appear to correlate with Murphy and Piercey┬┐s unit Dq and Fire Lake mafic metavolcanic units DMF, DMFr and DMFcp.
Cominco established a small grid in the southern portion of the property over which they conducted soil sampling and HLEM, magnetic and gravity geophysical surveys. Several moderate to strong Cu values (277 ppm max) from soils coincide with moderate to strong Ni-Fe-Mo-Cr+/-Pb-Ag values. The ground geophysical survey resulted in the identification of a moderately strong conductive zone with a coincident magnetic anomaly and a 0.3 mgal gravity response.
The purpose of the 1996 drill hole was to test a broad, moderately conductive feature with a coincident magnetic anomaly. The hole intersected a sequence of variably pyritic/pyrrhotitic, carbonaceous, dark grey to black silty mudstone with fine quartz sand layers interbedded with light grey quartzite. Total sulphide content is reported to be locally up to 10%, but the best assay returned 836 ppm Zn over 0.1 m.
The 1997 ground geophysical survey was designed to cover a broad aeromagnetic feature located under the lake. Results of the survey were discouraging with minimal conductivity and no anomalous values in magnetics or gravity.

References

ATLAS EXPLORATION LTD, Jun/67. Assessment Report #018896 by J.S. Brock and.

ATLAS EXPLORATION LTD, Jun/67. Assessment Report #018897 by T.L. Sadlier Brown.

ATLAS EXPLORATION LTD, Jun/67. Assessment Report #018899 by J.S. Brock and J.N. Boateng.

COMINCO LTD, Jan/95. Assessment Report #093325 by P.A. MacRobbie.

COMINCO LIMITED, Apr/98. Assessment Report #093715 by D.A. Senft.

COMINCO LIMITED, May/98. Assessment Report #093797 by D.C. Hall.

MURPHY, D.C., 1998. Stratigraphic framework for syngenetic mineral occurrences, Yukon Tanana Terrane south of Finlayson Lake: A Progress Report. In: Yukon Exploration and Geology 1997, Exploration and Geological Services Division, Indian and Northern Affairs Canada, p.51-58.

MURPHY, D.C. and PIERCEY, S.J., 1999. Geological map of parts of Finlayson Lake (105G/7, 8 and parts of 1, 2, and 9) and Frances Lake (parts of 105H/5 and 12) map areas, southeastern Yukon (1:100 000-scale). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1999-4.

MURPHY, D.C. AND PIERCEY, S.J., 2000. Syn-mineralization faults and their re-activation, Finlayson Lake massive sulphide district, Yukon-Tanana Terrane, southeastern Yukon. In: Yukon Exploration and Geology 1999, D.S. Emond and L.H. Weston (eds.), Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 55-66.

SEBERT, S. and HUNT, J.A., 1999. A note on preliminary lithogeochemistry of the Fire Lake area. In: Yukon Exploration and Geology 1998, Exploration and Geological Services Division, Indian and Northern Affairs Canada, p.139-142.

Location Map

Last Updated: Aug 29, 2018

Work History

Year Work Type Comment
1997 Ground Geophysics: Magnetics Also HLEM and gravity surveys. Carried out over ice at north end of Fire Lake.
1996 Drilling: Diamond One hole, 130.7 m
1996 Other: Prospecting One day program.
1994 Airborne Geophysics: Electromagnetic Also magnetic survey.
1994 Geochemistry: Soil
1994 Geology: Bedrock Mapping
1994 Ground Geophysics: Magnetics Also HLEM and gravity surveys.
1966 Geochemistry: Soil
1966 Geology: Bedrock Mapping
1966 Ground Geophysics: Magnetics Also EM survey.
1966 Airborne Geophysics: Electromagnetic Also magnetic survey.

Regional Geology - Terrane

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


Regional Geology - Bedrock

Supergroup:
Group/Suite: Grass Lakes
Formation: Fire Lake
Member:
Terrane: Yukon-Tanana
Period Max: Devonian
Age Max: 365 MA
Period Min: Devonian
Age Min: 357 MA
Rock Major: greenstone
Rock Minor:
Reference: Murphy et al. (2004) - YGS OF 2004-11
Geological Unit (1M): DMF
Geological Unit (250K): DMF1

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
096515 2013 2013 Satellite Mapping on the Fyre Lake Property Orthophoto Airphotography
093797 1997 1997 Assessment Report Rife Property Geophysics Watson Lake M.D., Yukon EM Ground Geophysics, Gravity Survey Ground Geophysics, Magnetics Ground Geophysics
093392 1995 Geophysical Surveys on the Chit, Dot, Jig, Ling, Rife and Zoo Claims of the Pelly Mountain Properties EM Ground Geophysics, Gravity Survey Ground Geophysics, Magnetics Ground Geophysics
093325 1994 1994 Assessment Report Rife and Tor Properties Linecutting, Ground Geophysics (HLEM, Mag and Gravity), Soil Geochemistry and Geological Mapping Rock Geochemistry, Soil Geochemistry, Bedrock Mapping Geology, EM Ground Geophysics, Gravity Survey Ground Geophysics, Magnetics Ground Geophysics, Line Cutting Other
018899 1967 Geochemical Soil Sampling Surveys, Ash Mineral Claim Group Soil Geochemistry
018896 1967 Magnetic and Electromagnetic Geophysical Surveys Ash Mineral Claim Group EM Ground Geophysics, Magnetics Ground Geophysics, Line Cutting Other
018897 1966 A Geological Report on the Ash Claims From 1 - 36 Inclusive, Fire Lake Area, Yukon Detailed Bedrock Mapping Geology

Related References

Number Title Page(s) Document Type
ARMC016592 Geochemical map - 105G/2 - Upper Black River Geochemical Map
ARMC013941 Report on the Ant mineral claim group - Fyre Lake area - June 28 to July 29, 1967 Report
ARMC013918 Report on the Ash mineral claim group May 20 to June 30, 1966 - Fyre Lake area - Watson Lake mining division Report
ARMC014028 Aero Mag-EM survey - Staking location - Fyre Lake area Geophysical Map
ARMC013873 Airborne EM-mag & photogeology - Fyre Lake, Central group - Drawing no. 9 Geophysical Map
ARMC013871 Airborne EM-mag & photogeology - Fyre Lake, East group Geophysical Map
ARMC013872 Airborne EM-mag & photogeology - Fyre Lake, West group Geophysical Map
ARMC013862 Staking map - Fyre Lake area Geoscience Map (General)
ARMC013912 Notes on frequency distributions - Ash group Miscellaneous Company Documents
ARMC013936 Geochemical map with overlay - Upper Black River Geochemical Map
ARMC013901 Magnetometer survey - Fire Lake E zone Geophysical Map
ARMC013938 Key map - Fyre Lake area - Grid location - Ant mineral claims Geoscience Map (General)
ARMC017625 Geochemical map of Upper Black River - Cu, Pb, Zn, Mn, Mo.W - Copper and lead numbers circled Geochemical Map
ARMC013911 Frequency calculation notes - Grass Lakes - Ash group Miscellaneous Company Documents
ARMC013903 Fyre Lake E.M. survey - High and low frequency profile - Ant and Ash claim groups Geophysical Map
ARMC013905 Fyre Lake geochem survey - Ash claim group Geochemical Map
ARMC013904 Geophysical field survey - Ash claim group - Fyre Lake area Geophysical Map
ARMC013934 Fyre Lake OEX staking claim map Geoscience Map (General)
ARMC013935 Fyre Lake OEX staking claim map Geoscience Map (General)
ARMC013910 Geochemical soil survey data - Fyre Lake - Ash group Miscellaneous Company Documents
ARMC013937 Geochemical stream sediment survey data - Ant group Assays
ARMC013940 Ant - Traverse - Geochem Geochemical Map
ARMC020489 Field notebook - Electromagnetic survey - Ash group claims Miscellaneous Company Documents
ARMC016574 Geochemistry map - 105G/2 - Upper Black River Geochemical Map
ARMC016573 Geology map - 105G/2 - Upper Black River Geoscience Map (Geological - Bedrock)
ARMC013939 Geochemistry map - Reconnaissance geochemical traverse - Ant claims Geochemical Map
ARMC013907 Ash group geochem - Contour map - Copper Geochemical Map
ARMC013908 Ash group geochem - Contour map - Zinc Geochemical Map
ARMC013909 Ash group mag map Geophysical Map
ARMC020544 Field notebook - Atlas Ex. 1966 - Ash, Ant, Tau, Calco, Dub 1-2, Tak groups Miscellaneous Company Documents
ARMC020560 Field notebook - Ash claim group - Fyre Lake Miscellaneous Company Documents
ARMC013906 Airborne EM-mag and photogeology - Fyre Lake, Central group - with notations Geophysical Map
ARMC013900 Airborne EM-mag and photogeology - Fyre Lake, East group - Drawing no. 10 Geophysical Map
ARMC013876 Airborne geophysical survey - Aeromagnetic map - Sheet 1 of 4 - Fyre Lake area Geophysical Map
ARMC013874 Airborne geophysical survey - Aeromagnetic map - Sheet 2 of 4 - Fyre Lake area Geophysical Map
ARMC013875 Airborne geophysical survey - Aeromagnetic map - Sheet 3 of 4 - Fyre Lake area Geophysical Map
ARMC013870 Airborne geophysical survey - Aeromagnetic map - Sheet 4 of 4 - Fyre Lake area Geophysical Map
ARMC013877 Airborne geophysical survey - Electromagnetic map - Sheet 1 of 4 - Fyre Lake area Geophysical Map
ARMC013878 Airborne geophysical survey - Electromagnetic map - Sheet 2 of 4 - Fyre Lake area Geophysical Map
ARMC013879 Airborne geophysical survey - Electromagnetic map - Sheet 3 of 4 - Fyre Lake area Geophysical Map
ARMC013869 Airborne geophysical survey - Electromagnetic map - Sheet 4 of 4 - Fyre Lake area Geophysical Map
ARMC013913 Cu statistics - Fyre Lake - Ash mineral claims Miscellaneous Company Documents
ARMC013915 Field maps of Fyre Lake showing geology and structure Geoscience Map (Geological - Bedrock)
ARMC013931 Cassiar development map - Fire Lake drilling to Sept. 12, 1961 Geoscience Map (General)
ARMC013930 Development map - Cassiar asbestos - Fyre Lake - E zone - 66-12 Geoscience Map (General)
ARMC013916 Claim map with notes - Ash group Geoscience Map (General)
Citations

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