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Occurrence Details


Occurrence Number
105G 035
Occurrence Name
Top
Occurrence Type
Hard-rock
Status
Showing


General Information

Secondary Commodities: cobalt, copper, zinc, lead, silver, gold
Deposit Type(s): Vein Polymetallic Ag-Pb-Zn+/-Au
Location(s): 61.2050 N, -130.491110 W
NTS Mapsheet(s): 105G01
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

Staked as Top cl 1-170 (75213) in Sep/60 by Cassiar Asbestos Corp which carried out an extensive regional program.
Restaked as Dub cl 1-167 (89964) in Jan/66 by Atlas Explorations Ltd. In 1980 Welcome North Mines Ltd optioned the Dub claims from Atlas. In 1990 Placer Dome Exploration Ltd optioned the remaining Dub claims from Welcome North Mines. As part of the option agreement Placer Dome restaked the occurrence within a large block of 192 Fire claims (YB33748).
In Nov/95 Columbia Gold Mines Ltd optioned the Fire claims from Welcome Opportunities Ltd (a successor company to Welcome North Mining Ltd and Atlas Exploration Ltd). The claims were included in a larger claim package which included the Fyre occurrence (Minfile Occurrence #105G 034) to the north and the Dub occurrence (Minfile Occurrence 105G 036) to the south. Between late June and early Oct/96, Columbia carried out an extensive exploration program on their claim block. Work carried out on and around the Top occurrence, included geological mapping, prospecting, ground geophysics and soil sampling. In 1997 the company carried out diamond drilling and a GPS grid survey southwest of the occurrence.
In May/99, Columbia Gold Mines Limited consolidated its capital on a 3 old for 1 new basis and changed its name to Pacific Ridge Exploration Limited.

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 Top occurrence is underlain 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 MK, Kudz Ze Kayah felsic metavolcanic unit, an undifferentiated feldspar-muscovite-quartz schist, feldspar and less commonly quartz augen schist. The lower contact between units DMF and MK is marked by unit MKcp, a carbonaceous muscovite-quartz schist or phyllite and quartz-muscovite (augen) schist (Murphy and Piercey, 1999 map). Mississippian aged variably strained granite (unit MSgs) occurs as a thrust panel north of the occurrence.
The original Top occurrence consists of veins developed within mafic volcanic rocks (unit DMF) near strained Mississippian granitic rocks (unit MSgs). Historical records report that minor galena occurs in a rusty quartz vein that cuts a small gossan developed in mafic schist. An assay of 2.9% Pb, 30.9 g/t Ag and 0.4% Zn was obtained by Cassiar Asbestos on a selected sample. Atlas and later companies reported numerous occurrences of massive sulphide float in the same general area.
Historically, the bulk of exploration work in the region was aimed at exploring the adjoining Fyre occurrence (Minfile Occurrence 105G 034) located 2 km to the north. Most companies explored the area around the Top occurrence in hopes of discovering similar VMS mineralization. Various soil sampling and geophysical surveys outlined coincident anomalies in the area but no substantial amount of mineralization have yet been found.
In 1997, Columbia Gold drilled two diamond drill holes (303 m) 2 km to the southwest. Both holes were drilled to test coincident geochemical and geophysical anomalies and intersected alternating bands of phyllite and biotite-chlorite-quartz-carbonate schists. Only trace amounts of disseminated pyrite and pyrrhotite were noted. Six additional, widely spaced holes were drilled in the area but no details have been released.

References

ATLAS EXPLORATIONS LTD, Feb/67. Assessment Report #061176 by J. S. Brock.

ATLAS EXPLORATIONS LTD, Feb/67. Assessment Report #061177 by J. S. Brock.

ATLAS EXPLORATIONS LTD, Feb/67. Assessment Report #061181 by T. L. Sadlier-Brown.

BLANCHFLOWER, D., DEIGHTON, J., AND FOREMAN, I., The Fyre Lake Deposit: A new VMS discovery. 1997. Columbia Gold Mines Ltd, Handout given at Cordilleran Round-up.

COLUMBIA GOLD MINES LTD, May/98. Assessment Report #093569 by J. D. Blanchflower and I. J. Foreman.

COLUMBIA GOLD MINES LTD, May/98. Assessment Report #093778 by J. Deighton and I. J. Foreman.

GEOLOGICAL SURVEY OF CANADA, Paper 61-23, p.42.

GEOLOGICAL SURVEY OF CANADA, Paper 62-27, p. 39-40.

HUNT, J.A. and MURPHY, D.C., 1998. A note on preliminary bedrock mapping in the Fire Lake area. In: Yukon Geology and Exploration 1997: Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p 59-68.

MURPHY, D.C., AND PIERCEY, S.J., 1999. Geological evolution of parts of Finlayson Lake (105G/7, 8 and and 9) and Frances Lake (parts of 105H/5 and 12) map areas, southeastern Yukon (1:100,000 scale). Exploration and Geological Services Division, 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.

PLACER DOME INC, Dec/91. Assessment Report #092991 by R.W. Stroshein

YUKON EXPLORATION AND GEOLOGY 1979-80, p.91-95; 1981, p. 135; 1996, p. 16-17, 30, 32; 1997, p. 36, 38.

YUKON EXPLORATION 1991, p. 6, 10.

Location Map

Last Updated: Sep 7, 2018

Work History

Year Work Type Comment
1997 Drilling: Diamond Two holes, 302 m. Six additional holes drilled but no information was filed.
1997 Other: Surveying GPS grid survey.
1996 Drilling: Diamond Number of holes drilled: 71 Amount of work done: 9532 METRES
1996 Geochemistry: Soil
1996 Geology: Bedrock Mapping
1996 Ground Geophysics: Magnetics Also HLEM survey.
1990 Geochemistry: Soil
1990 Geology: Bedrock Mapping
1990 Ground Geophysics: EM Maxmin survey.
1990 Airborne Geophysics: Electromagnetic Also resistivity, VLF-EM and magnetic surveys.
1966 Geology: Bedrock Mapping
1966 Ground Geophysics: EM Also magnetic survey.
1966 Other: Prospecting
1966 Airborne Geophysics: Electromagnetic Also magnetic survey.
1960 Geochemistry: Soil Also silt sampling.
1960 Geology: Bedrock Mapping
1960 Other: Prospecting

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
096896 2014 2014 Helicopter-Borne VTEM Geophysical Survey Electromagnetic Airborne Geophysics
096515 2013 2013 Satellite Mapping on the Fyre Lake Property Orthophoto Airphotography
093569 1996 Linecutting, Prospecting, Geochemical and Geophysical Report on the Fyre Lake Property Rock Geochemistry, Soil Geochemistry, EM Ground Geophysics, Magnetics Ground Geophysics, Line Cutting Other, Prospecting Other
092991 1991 Geological, Geochemical and Geophysical Report on the Kona Property Rock Geochemistry, Silt Geochemistry, Soil Geochemistry, Detailed Bedrock Mapping Geology, EM Ground Geophysics, Magnetics Ground Geophysics
090245 1977 1977 Geological Assessment Report Fyre Lake Property Bedrock Mapping Geology, Prospecting Other
061177 1966 Magnetic and Electromagnetic Geophysical Surveys Dub and Zot Mineral Claim Groups Electromagnetic Airborne Geophysics, Magnetic Airborne Geophysics, EM Ground Geophysics, Magnetics Ground Geophysics

Related References

Number Title Page(s) Document Type
ARMC013902 Preliminary compilation, electromagnetic, magnetic, geochemical surveys - Showing proposed D.D.H. locations - Fyre Lake project - Dub M.C. group Geophysical Map
ARMC016592 Geochemical map - 105G/2 - Upper Black River Geochemical Map
ARMC014028 Aero Mag-EM survey - Staking location - Fyre Lake area Geophysical Map
ARMC014015 Airborne EM - Mag. & photo geology with field notations- Fyre Lake, West group 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
ARMC013867 Notes on Fyre Lake previous work by G.S.C. Miscellaneous Company Documents
ARMC014004 Map showing PB samples creek SE of Fyre Lake - Dub claim group Geoscience Map (General)
ARMC013862 Staking map - Fyre Lake area Geoscience Map (General)
ARMC013936 Geochemical map with overlay - Upper Black River Geochemical Map
ARMC014000 Map of Dub claim group and geochemical stream sediment survey data Geochemical Map
ARMC013901 Magnetometer survey - Fire Lake E zone Geophysical Map
ARMC013866 Pelly Mountains area - Fyre Lake Report
ARMC013820 Resume of geology and mineralization in the area of the "E" zone, Fyre Lake, Y.T. Report
ARMC013987 Fyre Lake geochem survey - Dub 1 group - Contour map - Copper Geochemical Map
ARMC013986 Fyre Lake geochem survey - Dub 1 group - Contour map - Zinc Geochemical Map
ARMC013934 Fyre Lake OEX staking claim map Geoscience Map (General)
ARMC013935 Fyre Lake OEX staking claim map Geoscience Map (General)
ARMC013982 Compilation map - Dub group Geoscience Map (General)
ARMC013898 Drill log sample descriptions - Dub claims Miscellaneous Company Documents
ARMC013999 Analytical work sheet - Geochemical - Cu, Pb, Zn - T samples - Fyre Lake Miscellaneous Company Documents
ARMC013994 Analytical work sheet - Geochemical - Fyre Lake Miscellaneous Company Documents
ARMC013996 Analytical work sheet - Geochemical - R-32-66 - Fyre Lake Miscellaneous Company Documents
ARMC013997 Analytical work sheet - Geochemical - R-49-66 - Fyre Lake Miscellaneous Company Documents
ARMC013998 Analytical work sheet - Geochemical - R-64 - Fyre Lake Miscellaneous Company Documents
ARMC013995 Geochemical stream sediment survey data - Fyre Lake Miscellaneous Company Documents
ARMC013984 Mag. survey - Fyre Lake "E" zone Geophysical Map
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
ARMC014025 Airborne geophysical survey - Aeromagnetic map - Fyre Lake area 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
ARMC014024 Airborne geophysical survey - Electromagnetic map - 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
ARMC013861 Airborne geophysical survey - Fyre Lake area Geophysical Map
ARMC013915 Field maps of Fyre Lake showing geology and structure Geoscience Map (Geological - Bedrock)
ARMC013983 Cassiar asbestos E.M. survey - Sheridan-Kelk magniphase of "E" zone Geophysical Map
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)
ARMC013985 Claim map - Fyre Lake area - Cassiar asbestos Geoscience Map (General)
Citations

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