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File Created: 12-Jun-2012 by Garry J. Payie (GJP)
Last Edit:  22-May-2020 by Karl A. Flower (KAF)

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NMI
Name CROOKED CREEK, FORREST Mining Division Liard
BCGS Map 104B087
Status Prospect NTS Map 104B15E
Latitude 056º 48' 52'' UTM 09 (NAD 83)
Longitude 130º 41' 24'' Northing 6298000
Easting 396825
Commodities Gold, Copper Deposit Types I01 : Au-quartz veins
I06 : Cu+/-Ag quartz veins
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Crooked Creek showing area is underlain by Devonian metadsedimentary and metavolcanic rocks of the Stikine Assemblage. The Devonian Forrest Kerr Pluton is in contact the immediate west of the Stikine rock. Plutonic rocks consist primarily of Late Devonian granite and diorite.

Locally, andesite flows, minor feldspar porphyry andesite and crystal tuff are overlain by intercalated tuffaceous sediments and carbonaceous shales. The Crooked Creek showings comprise two groups of mineral occurrences, each in different but adjacent lithologies. The more westerly showing, hosted by phyllitic, graphitic argillites, occurs discontinuously along a 1 to 5-metre wide zone of shearing traceable for a length of 100 metres. The shear zone, striking 025 degrees and dipping 70 degrees east, is sub-parallel to axial planar cleavage displayed by minor folds within the argillites. Mineralization comprises chalcopyrite and pyrite with a gangue of silica and iron carbonate. Approximately 55 m to the east within the underlying porphyritic andesites arsenopyrite-bearing quartz veins have been identified. The veins are similar in nature to the arsenical quartz veins of the Creek (104B 489) showing area and are likely related to a similar regime of structural deformation and mineralizing events.

The Crooked Creek zone, is a zone of significant mineralization postulated to be the strike extension of the Creek Zone (104B 489) which lies across the valley about 1.5 kilometres to the south.

Drill Holes F95-1 and 2 tested the showings to depth. While down dip extensions of the showings are thought to have been encountered, the assays of drill core reported relatively low gold and copper values. The highest assay in Hole F95-1 was at 94.8 metres where sample 57025 reported 1.2 grams per tonne gold and 0.07 per cent copper over 0.7 metre (Assessment Report 24156). In Hole F95-2 at 76.9 metres, sample 57053 containing a chalcopyrite bearing quartz vein assayed 1.78 grams per tonne gold and 0.74 per cent copper over 0.2 metre (Assessment Report 24156). Both holes bottomed in relatively massive andesite containing few quartz-carbonate stringers. Sampling in 1990 Sampling down dip along the cliff face for approximately 100 metres and along strike for approximately 75 metres yielded high gold values up to 36.34 grams per tonne and copper up to 6.21 per cent (Assessment Report 23629).

The 1994 program of Abacus Minerals was designed primarily to gain a stronger understanding of the Crooked Creek zone, where some of the highest values in gold and copper have been identified to date on the Forrest Project. Drilling in 1995 by Meridian Peak Resources tested the Crooked Creek zone. See Forrest (104B 380) for a common work history of the Forrest Property.

Bibliography
EMPR ASS RPT *20562, *23629, *24156, 31193, 32548
EMPR BULL 104
EMPR GM 1997-03
EMPR OF 1990-02; 1990-16
GSC MAP 9-1957; 311A, 1418A
GSC MEM 246
GSC P 89-1E, pp. 145-154
*Lehtinen, J. (2012-11-20): 2011 Technical Report on the Forrest Project
EMPR PFD 803486

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