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YGS Publication Details


Reference Number
YEG1997_Foreman
Title
The Fyre Lake project 1997: Geology and mineralization of the Kona massive sulphide deposit
Reference Type
Indian & Northern Affairs Canada/Department of Indian & Northern Development: Exploration & Geological Services Division
Document Type
Annual Report Paper


General Information

Abstract: Columbia Gold Mines Fyre Lake project is located immediately to the east of Fire Lake, approximately 160 km north of Watson Lake in the Yukon Territory. The 1997 program, consisting of 44 diamond drill holes, doubled the known size of the Kona deposit. Mineralization within the Kona deposit has a defined strike length of 1500 m and a width of 250 m.

The Kona deposit is hosted within a strongly deformed and metamorphosed mafic to intermediate volcanic succession of chlorite-quartz and chlorite-actinolite-quartz schists. This volcanic package is overlain by a metasedimentary succession composed primarily of finely laminated carbonaceous phyllite that locally contains 1 to 20 m thick beds of micaceous volcanic-derived sediments. An intercalated unit of quartz-biotite schist and chlorite-mica-quartz schist marks the base of the metasedimentary succession.

The Kona deposit consists of two parallel northwest trending zones of copper-cobalt-gold volcanogenic massive sulphide mineralization: East Kona and West Kona. East Kona is made up of two distinct horizons: the Upper Horizon and the Lower Horizon. The Upper Horizon occurs immediately below the contact of the metasediments and the metavolcanics while the Lower Horizon occurs 40 to 70 m deeper, within the mafic volcanics. The mineralization of East Kona consists primarily of pyrite with lesser amounts of pyrrhotite and chalcopyrite occurring as massive to banded sulphides with local lenses of massive magnetite. The mineralization across West Kona changes from magnetite, pyrite, and chalcopyrite hosted within a grey siliceous matrix in the east, or down dip, through massive pyrite and lesser chalcopyrite into massive pyrrhotite in the west. The mineralization of West Kona occurs immediately below the metasedimentary and metavolcanic contact; the same stratigraphic position as the Upper Horizon of East Kona. All of the mineralized zones that make up the Kona deposit have an eastern dip and plunge to the southeast.

The Kona deposit, as defined to date, consists of a 15 million tonne mineralized container with the northern, near-surface portion amenable to open pit extraction. The last two holes of the 1997 program intersected mineralization 450 m along strike from previous drilling. The deposit remains open for expansion to the southeast.
Authors: Foreman, I.
Map Scale: 1 : 0
NTS Mapsheet(s): 105G
Citation: Foreman, I., 1998. The Fyre Lake project 1997: Geology and mineralization of the Kona massive sulphide deposit. In: Yukon Exploration and Geology 1997, Roots, C.F. (edt), Indian & Northern Affairs Canada/Department of Indian & Northern Development: Exploration & Geological Services Division, 105-114.

Downloads

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Report File is .81 MB Download PDF

Location Map

NTS Mapsheet(s): 105G

Related Occurrences

Name Number Type Status
Fyre Lake 105G 034 Hard-rock Deposit

Related Publications

Number Relationship Authors Title
YEG1997 Contained By Roots, C.F. (ed.) Yukon Exploration and Geology 1997