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File Created: 08-Mar-2021 by Del Ferguson (DF)
Last Edit:  31-Mar-2021 by Del Ferguson (DF)

Summary Help Help

NMI
Name PORCHER-V Mining Division Skeena
BCGS Map 103G099
Status Showing NTS Map 103G16W
Latitude 053º 56' 24'' UTM 09 (NAD 83)
Longitude 130º 21' 55'' Northing 5977709
Easting 410381
Commodities Vanadium, Titanium, Iron Deposit Types M04 : Magmatic Fe-Ti+/-V oxide deposits
Tectonic Belt Coast Crystalline Terrane Alexander
Capsule Geology

The Porcher-V showing is located 7 kilometres west of Oona River on southeast Porcher Island, 41.8 kilometres south-southwest of Prince Rupert, B.C.

A sill-like complex of interbanded, coarse- and fine-grained, basic to ultrabasic, igneous rocks intrudes into fine-grained dark tuff, or slaty greenstone, and is intruded on the east by granodiorite. The banded complex appears to be more than 100 feet thick and at least 600 feet long, possibly much more. It is composed of interbanded hornblende gabbro, anorthositic gabbro, and pyroxenite, all impregnated with clots and seams of 16 titaniferous magnetite and ilmenite. The bands in the rock strike easterly and dip 45 to 60 degrees northerly but swing northwest and may reappear on the ridge to the north. Titaniferous magnetite is most abundant in two zones about 50 to 100 feet thick near the crest of the ridge, where it forms bands 4 to 8 inches thick carrying white plagioclase and tabular prisms of black hornblende arranged vertically and at right angles to the margins of the bands. Epidote and feldspar are common in seams both in joints parallel to the banding and in nearly vertical, north-south, crosscutting joints. In polished section titanomagnetite and ilmenite form interlocking crystal mosaics that are interstitial to the silicate minerals, together with minor pyrrhotite, pyrite, and chalcopyrite (Nelson et al, 2009).

A 2019 exploration program by BC Vanadium Corp. (subsidiary of Delrey Metals Corp.) consisted of a 472.48 line kilometre aeromagnetic survey, prospecting and the collection of 61 rock samples. The dominant features highlighted by the airborne survey are two roughly concentric magnetic highs located in the central part of the property proximal to a northwest-southeast trending magnetic trough possibly 2 representing a regional suture/fault zone. These features contain two strong magnetic high cores which represent zones of vanadium rich titaniferous magnetite enrichment within gabbros.

2019 rock sampling results highlight areas of anomalous to extremely anomalous Vanadium, Iron and Titanium, particularly in the southern and northeastern parts of the central magnetic anomaly. Most encouraging were the Vanadium results from a several kilometre long, roughly 400 metres wide, north south trending mountain ridge with selective outcrop samples assaying up to 0.422 per cent V205 (47.8 per cent Fe, 2.69 per cent Ti). 11 of the 61 selective rock samples from the property returned greater than 0.20 per cent V205. All rock samples are described as hornblende gabbros to diorites with variable enrichments of vanadium rich titaniferous magnetite (between 5 to 95 per cent). Iron results were variable across the magnetic anomaly with selective outcrop samples ranging from 6.26% to 47.8% iron. In general, increased iron enrichment corresponded with increase vanadium and titanium concentrations (Assessment Report 38265).

Bibliography
EMPR ASS RPT 38265
EMPR P 2010-1
GAC Special P 46, pp 171-200
GSA BULL VOL 108, pp 722-734
GSC ECON GEOL RPT 28
Tectonics VOL 6, pp 151-174; 18, pp 278-292

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