British Columbia Ministry of Energy, Mines and Natural Gas and Responsible for Housing
News | The Premier Online | Ministries & Organizations | Job Opportunities | Main Index

MINFILE Home page  ARIS Home page  MINFILE Search page  Property File Search
Help Help
File Created: 31-Aug-1989 by Stephen D. Hiebert (SH)
Last Edit:  10-Aug-2020 by Karl A. Flower (KAF)

Summary Help Help

Name TWIN CREEKS, REG Mining Division Liard
BCGS Map 104B065
Status Showing NTS Map 104B11E
Latitude 056º 38' 14'' UTM 09 (NAD 83)
Longitude 131º 05' 37'' Northing 6278964
Easting 371594
Commodities Gold, Silver, Lead, Zinc, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
G04 : Besshi massive sulphide Cu-Zn
Tectonic Belt Insular Terrane Stikine
Capsule Geology

Three stratigraphic assemblages have been mapped in the area: (1) Upper Palaeozoic sediments and volcanics of the Stikine Assemblage, (2) clastic sediments of the Triassic Stuhini Group, and (3) Lower Jurassic sediments and volcanics of the Hazelton Group.

Four plutonic suites intrude the above; (1) Late Triassic calc-alkaline intrusions coeval with Stuhini Group stratigraphy, (2) Jurassic Copper Mtn, (3) Jurassic Texas Creek and (4) Tertiary Coast Plutonic suite. Metallogenically , Texas Creek potassium feldspar megacrystic porphyries are of primary interest as they are spatially associated with a number of gold deposits and showings in the area.

A massive sulphide deposit discovered during the BC Geological Survey’s 1989 field season is located on the Reg #1 and #3 claims of Skyline Gold Corporation (Johnny Mountain mine site).

The showing consisting of a 10 to 30 centimetre thick horizon of massive sulphides including galena, pyrite, sphalerite, and possible chalcopyrite with minor oxidation to limonite. Approximately 10 per cent of the horizon consists of gangue, primarily quartz.

The deposit is stratiform to metawackes above and below, locally metamorphosed 100 metres to the southeast to hornfels facies. Ages of host rocks are approximately Triassic-Jurassic, lying within the Hazelton Supergroup. The deposit is considered to be of epigenetic hydrothermal origin, possibly associated with local minor shearing. The deposit can be located in two parallel creek beds approximately 250 metres apart.

Trenching and sampling was conducted in 1989 by Sky Creek Exploration for Skyline Gold Corp, but no report of this work was published.

See Johnny Mountain (104B 107) for details of a common work History.

EMPR FIELDWORK *1989, p. 123
EMPR GM 1997-03
EMPR OF 1989-10; 1990-16; 1994-1; 1992-1; 1992-3; 1998-10
EMPR PF (Grove, E.W., (1986): Geological Report, Exploration and Development Proposal for Skyline Exploration Ltd., Reg Property, Apr.20, 1986; Grove, E.W., (1987): Stonehouse Gold Deposit Reg Property of Skyline Explorations Ltd., Sept.15, 1987 in Canadian Institute of Mining and Metallurgy, Eleventh District 6 Meeting, Vancouver, British Columbia, Oct.29-31, 1987; Refer to Stonehouse, 104B 107)
GSC MAP 9-1957; 311A; 1418A
GSC P 89-1E, pp. 145-154
Anderson, R.G., (1988): A Paleozoic and Mesozoic Stratigraphic and Plutonic Framework for the Iskut Map area (104B), Northwestern British Columbia, pp. A1-A5, in Geology and Metallogeny of North- western British Columbia, Smithers Exploration Group, G.A.C. Cordilleran Section Workshop, October 16-19, 1988
Burgoyne, A.A. (2012-05-07): Technical Report on The Iskut Property with Special Reference to Johnny Flats & Burnie Trend Targets
Placer Dome File
EMPR PFD 671576