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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  17-Feb-2015 by Garry J. Payie (GJP)

Summary Help Help

NMI 093M4 Cu7
Name MT, PORPHYRTY CREEK, CORYA Mining Division Omineca
BCGS Map 093M003
Status Showing NTS Map 093M04E
Latitude 055º 04' 55'' UTM 09 (NAD 83)
Longitude 127º 32' 25'' Northing 6104884
Easting 593182
Commodities Copper, Molybdenum Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Plutonic Rocks, Overlap Assemblage
Capsule Geology

The MT showings are located at the headwaters of Corya Creek, 19 kilometres south of New Hazelton.

Widespread disseminated pyrite mineralization is associated with the southern contact of the Late Cretaceous Rocher Deboule granodiorite stock (Bulkley Plutonic Suite) which intrudes andesitic and dacitic flows and breccias of the Upper Cretaceous Brian Boru Formation (Kasalka Group). Minor molybdenite and chalcopyrite and possibly weathered sphalerite (or tetrahedrite) are associated with the pyrite.

The MT area of interest occurs in an area of a large EM anomaly along the southern fringe of the Rocher Deboule Stock. The site was visited in a day and two samples were taken from a gossanous outcrop on a cliff face on the south side of the north fork of Corya Creek. Sample MWPC10-03A was an aplitic intrusive with disseminate pyrite and sample MWPC10-03B was a grey tuff with disseminate pyrite. Neither of these two samples contained any anomalous base or precious metals or pathfinder elements. Dunham gold reported that the area required further follow up work because Assessment Report showed the MT showing as being on the south fork of Corya Creek, around 1 kilometre to the south of the area that was visited. Duncastle also stated that the source of the anomalously high and widespread EM anomaly in the area required further investigation.

Work History

The MT group of 42 recorded claims was held in 1967 by Amax Exploration Inc as the Corya property. Work included geological mapping and a geochemical soil survey that resulted in 133 samples.

In 1978, Van Gaalen and others collected 200 samples on the MT occurrence. Only 2 grab samples were analyzed and 6.4 kilometres of trail were made.

In 2010, Dunham Gold Corp completed a 495 kilometre airborne geophysical survey on its Porphyry Creek property which covered numerous showings including the MT showing (Assessment Report 31728).

In 2010, Ranex Exploration Inc/Duncastle Gold Corp conducted site visits to Sultana, Tina North, Big Thing and MT. 480 soil samples were collected and 3 diamond-drill holes were completed for a total of 1330.5 metres (Assessment Report 32516). The Sultana prospect was the main focus of the 2010 exploration and drilling program. Site visits were also made to the MT showing, the Big Thing showing and various areas of geophysical interest around the Tina showing. The Big Thing geophysical anomaly, which was the second most prospective of the east side porphyry targets, requires more follow-up as the sampling showed promise.

Refer to Sultana (093M 061) for details for further details of the Porphyry Creek property work.

Bibliography
EMPR AR 1967-85
EMPR ASS RPT *1134, *6894, 30096, 30431, *31728, *32516, 32326, 33475
EMPR BULL 43
EMPR EXPL 1978-E222
EMPR FIELDWORK 2006, pp. 1-17
EMPR OF 2008-6
EMPR MAP 69-1 (#274)
GSC OF 720, 2322, 5705

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