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File Created: 09-Jun-1986 by Larry Jones (LDJ)
Last Edit:  29-Nov-1988 by Jonathan N. Rouse (JNR)

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NMI
Name NEEDLES, RILEY, COURTE, MMG, RILEY CREEK Mining Division Skeena
BCGS Map 103F038
Status Showing NTS Map 103F08W
Latitude 053º 22' 54'' UTM 08 (NAD 83)
Longitude 132º 27' 21'' Northing 5917563
Easting 669330
Commodities Gold, Silver, Antimony Deposit Types H03 : Hot spring Au-Ag
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The area is underlain by Middle Jurassic Yakoun Group rocks dominated by pyroclastic andesites and lesser massive andesite, conglomerates, volcanic sediments and argillites. These rocks are cut by quartz diorites and porphyritic felsic dikes.

The dominant structure on the property is a major west northwest trending fault zone (Rennell-Louscoone fault system), with associated splays and subparallel faults. The fault system appears to control the mineralization and alteration.

Clay-carbonate-sericite-silica as well as pervasive propylitic alteration occurs in a zone up to 300 metres by 350 metres. The abundance of carbonate in the area may express mobilization of the limy fraction of the underlying Juro-Triassic Kunga Group.

Disseminated, massive and fracture filled pyrite occurs within a zone of altered andesite, agglomerate flows, and pyroclastics with intercalated argillite. The zone also includes a 5 to 10-metre mineralized northwest trending fault zone. A sample assayed 13.7 grams per tonne gold (Assessment Report 11533).

A post mineral fault, trending northeast, is interpreted to offset the west part of the mineralized zone 500 metres to the southwest. The termination of the mineralization is interpreted to be caused by pinching and swelling along a series of subparallel northwest trending faults.

A 3.0-metre chip sample of the altered zone assayed 0.93 gram per tonne gold and a 1.0 metre sample assayed 0.96 gram per tonne gold and 0.68 gram per tonne silver (Assessment Report 15325).

Misty Mountain Gold Ltd. flew airborne radiometrics, resistivity and magnetometer surveys over the showing in 1995 while exploring a large block of claims surrounding the Sol property.

Bibliography
EMPR ASS RPT 6726, 6968, 7265, 8225, 10144, *11533, *15325, 24008, 25086
EMPR BULL 54
EMPR EXPL 1978-233; 1979-246-47; 1980-374; 1983-496; 1986-C419
EMPR FIELDWORK 1997, 19-1-19-14
GSC BULL 365
GSC MAP 1385A; 5-1990
GSC OF 2319
GSC P 86-20; 88-1E; 89-1H; 90-10; 91-1A, pp. 353-358
GCNL #179,#198, 1985

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