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File Created: 15-Jul-1988 by Laura L. Coughlan (LLC)
Last Edit:  10-Aug-2020 by Karl A. Flower (KAF)

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NMI
Name DAN 2, THIRD BASIN GOSSAN, AREA D, ANDRONE, JOHNNY MOUNTAIN Mining Division Liard
BCGS Map 104B055
Status Showing NTS Map 104B11E
Latitude 056º 34' 27'' UTM 09 (NAD 83)
Longitude 131º 01' 37'' Northing 6271824
Easting 375475
Commodities Lead, Zinc, Silver, Gold, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
I02 : Intrusion-related Au pyrrhotite veins
Tectonic Belt Insular Terrane Stikine
Capsule Geology

The Dan 2 area is underlain by Devonian to Permian marine sedimentary and volcanic rocks of the Stikine Assemblage which area overlain by marine sedimentary and volcanic rocks of the Upper Triassic Stuhini Group. Lower Jurassic rock of the Hazelton groups overly the Stuhini rock.

The volcanic and sedimentary sequences were intruded by the Tertiary-Cretaceous Coast Plutonic Complex. A wide variety of intrusive phases are present including granodiorite, quartz monzonite and diorite. Small satellitic plugs from the main batholith are important for localizing mineralization.

The predominant lithologies on the property consist of marine sediments, volcaniclastics and volcanic flows. The marine sediments consist of argillites, argillaceous siltstones, and siltstone with some quartzite, greywacke and carbonates. These sediments are interbedded with contemporaneous marine volcanics ranging from rhyodacite to basalt in composition. Volcanic facies include crystal fragmental tuff, lithic tuff, breccias, agglomerate, flows and sills.

Low grade regional metamorphism has occurred within the marine sediments which contain abundant chlorite. Foliation is usually conformable with the bedding. Fault and shear zones trend 135 degrees and about 045 degrees with andesite and basalt dykes following the 045 degree structures and felsite dykes related to the 135 degree structures.

Locally, mineralization appears to be associated with base metals in distinct quartz vein systems. Pyritization, of up to 15 per cent, is commonly associated with silicified zones. Upon weathering, these zones develop moderate to intense gossans composed of hematite, goethite, jarosite and pyrolusite.

Mineralization occurs within the Third Basin Gossan (Area D) in silicified and hematized argillites and silicified and chloritized siltstones. Within these altered sediments are abundant quartz stringers. As well, disseminated pyrite with traces of galena occur within these altered, gossanous rocks.

In 1987, a grab of argillite with quartz stringers and traces of pyrite and galena assayed 0.685 grams per tonne gold, 43.8 grams per tonne silver, 0.04 per cent copper, 0.674 per cent lead and 2.205 per cent zinc (Assessment Report 16957).

In 1984, a rock chip sample from Area D assayed 13.03 grams per tonne gold, 1097.1 grams per tonne silver, 0.25 per cent copper, 1.50 per cent lead and 3.06 per cent zinc (Property File: Ikona, C.K., 1987).

In 1987, Pezgold Resources sampled rocks on the northern wall of the basin. One sample at 1750 metres assayed 220 parts per billion Au and 0.12 per cent copper (20624, 1988). Another sample, 700 metres east and 100 metres higher elevation, carried 13.7 grams per tonne silver and 2.2 per cent zinc (Assessment Report 18156).

Bibliography
EMPR ASS RPT *11327, *13244, *16957, 25009
EMPR BULL 63
EMPR EXPL 1983-524; 1984-387,388
EMPR GEM 1972-518; 1973-501; 1974-335
EMPR GM 1997-03
EMPR OF 1989-10; 1990-16; 1994-1; 1992-1; 1992-3; 1998-10
EMPR PF (*Ikona, C.K., (1987): Geological Report on the Dan 1-3 and Burnie 1-4 Claims, May 1987 in Statement of Material Facts #123/87 for Androne Resources, Sept. 8, 1987)
GSC MAP 9-1957; 311A; 1418A
GSC MEM 246
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 Northwestern British Columbia, Smithers Exploration Group, G.A.C.
Burgoyne, A.A. (2012-05-07): Technical Report on The Iskut Property with Special Reference to Johnny Flats & Burnie Trend Targets Cordilleran Section Workshop, Oct. 16-19, 1988

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