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File Created: 19-Aug-1991 by Ron McMillan (RHM)
Last Edit:  17-Feb-2015 by Garry J. Payie (GJP)

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NMI
Name KNOLL Mining Division Omineca
BCGS Map 093M025
Status Showing NTS Map 093M06E
Latitude 055º 15' 26'' UTM 09 (NAD 83)
Longitude 127º 07' 57'' Northing 6125005
Easting 618688
Commodities Silver, Zinc, Lead Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
H : EPITHERMAL
Tectonic Belt Intermontane Terrane Overlap Assemblage
Capsule Geology

The Knoll claims are located 34 kilometres east of Hazelton on the east side of Harold Price Creek.

The claims are underlain by a knob of Upper Cretaceous Brian Boru Formation (Kasalka Group) volcanic rocks ranging from rhyolite to andesite in composition. Rhyolitic rocks consist of fine grained, massive but highly fractured felsite, porphyry and flow banded units. Local flow banding suggests the knob may be a volcanic dome complex. The volcanic rocks occur east of a prominent block fault which underlies Harold Price Creek. The volcanic rocks are altered and pyritized with local disseminated and fracture-controlled sphalerite and galena. One grab(?) sample assayed 80.0 grams per tonne silver (Assessment Report 13960).

Mineralization at the Knoll claims is mainly disseminations and veinlets of pyrite, sphalerite, and galena set in rhyolite breccia and lapilli tuff. Hand specimens of pyritic rhyolite from Harald Price Creek and not tested by drilling return high levels of lead, zinc and arsenic, and locally in silver and cadmium. Gold and silver values are anomalous, but modest. Seven drill holes tested an IP anomaly. They passed through fracture controlled veins filled with pyrite, pyrrhotite, and arsenopyrite with quartz and calcite. Several of the holes drilled in the south east part of the property went through the Rhyolite dome into black argillies. (The regional geologist suggests the rocks are of mid Cretaceous Age and correlative with the Rocky Ridge Formation (of the Skeena Group) and thus have Eskay deposit styles potential). Mineralization was discovered by Ethier in 1983, and in 1988 Goldpac Investments optioned the property and performed geological, magnetic and induced polarization surveys followed by diamond drilling. In 1999 Ethier completed a soil survey supported by PAP (BC EMPR Exploration 1999, pages 79-84).

In 2011 it was reported that the mineralization seen in the 1988 program drill core at the Knoll area (east of Harold Price Creek) shows some differences from that present further west in the Max area, both in style and mineralogy. In addition to spherulitic rhyolites, the Knoll core includes thin-bedded, silty sediments that appear to represent distal turbidites. These contain thin beds of pyrite and pyrrhotite with sporadic sphalerite. Also present are cross-cutting veins of pyrite, arsenopyrite, galena and chalcopyrite with anomalous quantities of gold and silver. Much of the sphalerite seen in the Knoll drill core is pale colored and presumably iron-poor, suggesting it is relatively low temperature and was deposited more distally. This contrasts with the dark to black, presumably higher temperature Fe-rich sphalerite present throughout the Max area.

The stratiform sulfide occurrences in the Max-Knoll area are believed to represent syn-sedimentary VMS mineralization that was originally deposited under shallow marine conditions on the sea floor. Some of the cross-cutting veins hosted by the sedimentary and volcanic rocks probably represent feeder conduits for the stratiform sulfides. However, partial remobilization of some sulfide zones probably occurred during the subsequent emplacement of the Max Stock, and some intrusion-hosted mineralization may have been derived from the earlier VMS event

WORK HISTORY

Exploration in the Knoll area east of Harold Price Creek began after the discovery, in May 1983, of zinc-lead mineralization (Assessment Report 13960). Goldpac Investments Ltd. optioned the Knoll area and in 1988 built an access trail to complete geological mapping, and magnetic and induced polarization (IP) geophysical surveys. In 1988, seven diamond drill holes totaling 978 meters were completed in various parts of the Knoll area; these were collared to test IP anomalies (Exploration and Mining in BC 1999). The highest grade intercept was in hole 88-3 which cut a 1.0 meter-thick section assaying 0.51 per cent lead, 1.32 per cent zinc, 9.58 per cent arsenic, 30 grams per tonne silver and 1.61 grams per tonne gold (Exploration and Mining in BC 1999). Ten grab samples collected by Ethier had maximum values of 47.4 grams per tonne silver, 0.03 gram per tonne gold, greater than 1 per cent lead, greater than 1 per cent zinc, greater than 1 per cent arsenic, 40 parts per million antimony and 72 parts per million copper (as reported in Assessment Report 33559). It is believed that no further work was done in the area until prospector Daniel Ethier completed a soil sampling survey in 1999. Subsequently, Wojdak and Ethier (2000) published a geology map (Exploration and Mining in BC 1999) of the Knoll area based on work by Leask et al. (private report).

In 2011, Price Creek Mining conducted an exploration program on the Max-Knoll property. Work consisted of the collection of 246 rock samples, 66 silt samples and 1508 soil samples. An airborne electromagnetic survey was conducted over 454.5 line kilometres (Assessment Report 33559). The airborne survey included the area from the Max (093M 027) east to the Knoll (093M 100) occurrence and beyond.

Bibliography
EMPR ASS RPT *13960, 30787, 33559
EMPR EXPL 1999-80-84
EMPR FIELDWORK 2000, pp. 253-268
EMPR PF (Prospectors Report 1995-53 by Daniel Ethier; Prospectors Report 1999-44 by Daniel Ethier)
GSC OF 2322 (#234)

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