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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  16-Jan-2020 by Garry J. Payie (GJP)

Summary Help Help

NMI
Name HO, GRIZZLY Mining Division Atlin, Liard
BCGS Map 104J021
Status Showing NTS Map 104J04W
Latitude 058º 13' 10'' UTM 09 (NAD 83)
Longitude 131º 51' 41'' Northing 6456711
Easting 331933
Commodities Copper Deposit Types L03 : Alkalic porphyry Cu-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The HO occurrence is located on the west slopes of Kaketsa Mountain, 1.5 kilometres east of the Sheslay River, about 55 kilometres northwest of the community of Telegraph Creek.

The copper showing occurs near the contact of the Late Triassic Kaketsa pluton with Upper Triassic Stuhini Group volcanic and related sedimentary rocks. Pyrite with minor chalcopyrite is localized along fractures in volcanic rocks.

The volcanic rocks are mainly porphyritic flows with lesser tuffs and tuffaceous siltstones. The flow rocks form massive units and are grey to dark green andesitic to basaltic porphyries with phenocrysts of augite and hornblende. The Kaketsa pluton is an elliptical intrusion 4 by 5.6 kilometres in diameter. Hornblende gave a K-Ar date of 218 +/- 8 million years (Geology, Exploration and Mining in British Columbia 1972, page 548). The core of the pluton is medium to coarse grained, equigranular quartz diorite or granodiorite.

Work History

During 1971, Skyline Explorations Ltd. conducted a detailed program of geologic mapping, sampling and ground magnetometer surveying. A total of 199 magnetometer readings were taken; 200 reconnaissance silt or soil samples were collected from around Kaketsa Mountain but several samples were lost in transit and only 135 results are available.

In 2013, a 339 kilometre airborne magnetic and radiometric survey was completed over the northwest part of the property that identified a number of magnetic highs and Th/K lows associated with copper-gold showings (Assessment Report 34492). Interpretations are found in Assessment Report 35011).

In 2018, Garibaldi Soil conducted geochemical surveys on 4 of the 5 targets: Hat East, Pyrrhotite Creek South (new showing), West Kaketsa (104J 024), and AL 9 (104J 060). In total 192 soil samples were taken. The 26 soil samples at West Kaketsa averaged 280.1 parts per million copper with a high of 1490 parts per million copper and a low of 52.3 parts per million copper. 9 of these soil samples were greater than 300 parts per million copper, including 4 greater than 500 parts per million copper and including 1 greater than 1000 parts per million copper copper (Assessment Report 37794). Rock sampling was completed at 5 targets: Pyrrhotite Creek South (10 rocks), West Kaketsa (22 rocks), Grizzly Prospect (12 rocks), AL 9 (1 rock) and Hat East (1 rock). In total 46 rock samples were taken. Mapping was conducted on all targets except Hat East. From September 21,to October 10, 2018 Geotech flew a Versatile Time Domain Electromagnetic (VTEM plus) and Horizontal Magnetic Gradiometer Geophysical Survey over the Grizzly claims. A total area of 303 square kilometres – or 1705 line-kilometres – of geophysical data were acquired during the survey covering the entire Grizzly property.

See West Kaketsa (104J 024) for related geological and historical information. Some of the West Kaketsa rock samples reported by Garibaldi Resources under that name were actually closer to the Ho occurrence than to the West Kaketsa (104J 024).

Bibliography
EMPR ASS RPT *3514, 22100, 33058, *34492, 35011, *37794
EMPR PF (104J General File - Claim maps 73M, 73 M-1, Dec. 1970)
EMPR FIELDWORK 1974, pp. 63-68
EMPR OF 1996-11
GSC OF 707
GSC BULL 504
GSC MAP 9-1957; 21-1962; 1418A; 1712A; 1713A
GSC SUM RPT 1925, Part A, pp. 33A-99A

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