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File Created: 10-Nov-1987 by Larry Jones (LDJ)
Last Edit:  01-Oct-2012 by Karl A. Flower (KAF)

Summary Help Help

NMI 103A8 Au1
Name NEEKAS, HEBREW Mining Division Skeena
BCGS Map 103A050
Status Showing NTS Map 103A08E
Latitude 052º 28' 19'' UTM 09 (NAD 83)
Longitude 128º 10' 26'' Northing 5813852
Easting 556114
Commodities Zinc, Copper, Silver Deposit Types K02 : Pb-Zn skarn
Tectonic Belt Coast Crystalline Terrane Alexander
Capsule Geology

The Neekas showing is located on the western side of Neekas Cove on the Don Peninsula, approximately 26.5 kilometres southeast of the community of Klemtu.

The stratigraphy in the Neekas-Hebrew area consists of a central zone of mixed sedimentary rocks, volcanics, and limestone, surrounded by gneissic diorites. The stratified rocks strike northwesterly from the mouth of the Neekas Creek to Salmon Bay, and is on average 150 metres wide. The enclosing diorites appear to be younger, suggesting that the stratified rocks are a roof pendant. Ages of both units are unknown. It is most likely that the diorites are part of the Mesozoic Coast Plutonic Complex. The stratified rocks may be as old as Devonian and may be correlative with the Sicker Group. The stratified rocks face steeply to the southwest. The structurally lowest (so presumably the oldest) rocks on the property are, dark green, melanocratic, foliated, medium-grained massive mafic volcanics, which are locally metamorphosed to amphibolite.

Immediately to the south and enclosing other units of mafic volcanics is a mixed package of banded metasediments and volcanics, including calcareous bands. Metamorphic biotite, chlorite, garnet and albite are present. This mixed unit is roughly 300 metres thick. Two or more bands of white, coarse-grained marble averaging 25 metres in thickness, are interbedded with the stratified rocks. The marble bands host or are in close proximity to the mineralization on this property. Spatially associated with the marble are two phases of skarn, the first has marble as a protolith, the second has the mixed stratified unit as a protolith. Garnet, pyroxene, phlogopite, sulphides, plus quartz and calcite are present. Bordering the upper contact of the stratified rocks along the southern margin are a series of foliated tonalites. A series of unfoliated porphyritic tonalites outcrop north of the stratified rocks. Unfoliated mafic dikes crosscut all of the aforementioned units.

Mineralization consists of sulphide veins (sphalerite, pyrite, pyrrhotite, galena and chalcopyrite), and of blebs, pods and disseminations of the above minerals, and covellite, in the mafic volcanics. Skarn minerals; garnet, pyroxene, phlogopite and epidote, are associated with the veins.

In 1952 the area surrounding the Hebrew Crown Grant (103A 003) was staked as the Neekas 1 to 12 claims. Workings on the Neekas consisted of a series of open cuts which exposed the mineralized zones about 1200 metres to the northwest and 250 metres to the southwest of the adit. Kennco Explorations Canada Limited and American Smelting and Refining examined the property in 1953. In 1987 the area was staked as the Neekas claim by Lac Minerals, who conducted an exploration program of soil and stream sediment sampling and geological mapping. The geochemistry indicated anomalously high zinc values along the volcanic zone. A 2 metre chip sample of massive sulphide on the outer Neekas claim assayed 9.99 per cent zinc, 0.44 per cent copper, and 10.3 grams per tonne silver. A 2.5-metre chip across the adit mouth on the old Hebrew Crown grant assayed 2.12 per cent zinc and 0.15 per cent copper (Assessment Report 16148). In 1991, Cascadia Prospecting Syndicate staked the area including the Hebrew and Neekas showings and conducted rock, silt and soil sampling, hoping to find evidence of volcanogenic massive sulphide mineralization. The work confirmed that the showings are skarns. The best grab sample returned a value of 10.72 per cent zinc (Assessment Report 22139).

Bibliography
EMPR ASS RPT *16148, 22139
GSC MAP 9-1966; 1328A; 1385A
GSC MEM 372
GSC P 66-25

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