 The Shihan VMS
Property is located within the eastern arm of the Michipicoten
Greenstone Belt (MGB). The MGB is the largest greenstone belt in
the Wawa Subprovince of the Superior Structural Province of the
Canadian Shield. The metasedimentary and metavolcanic rocks were
then intruded by compositional, variable-aged plutons. The
supracrustal rocks within the belt strike in an east to
northeast direction and are bounded by the Puskaskwa Batholith
in the west and the Kapuskasing Structural Zone in the east.
Structural displacement of all rock types is present with
distinct northwest and northeast trending faults displaying
displacements of tens to hundreds of metres.
At least three discrete cycles of volcanism
have been identified within the belt. The Catfish assemblage
(Cycle 3) is the youngest episode and covers the property. From
north to south it consists of massive to pillowed magnesium and
iron-rich tholeiitic metavolcanic flows overlain by felsic
metavolcanic rock composed of tuff, lappili tuff, breccia,
quartz-crystal tuff and cherty rhyolite. The rocks were then
intruded by massive to foliated granodiorite, trondhjemite and
quartz monzonite.
The Zinc Zone was interpreted to be an
Archean-aged, VMS Zn-Cu Deposit type hosted at the contact of
overturned, Na2O-CaO depleted, pyrite enriched, altered quartz
crystal tuff (quartz-sericite schist) representing the
stratigraphic hanging wall to the mineralization, and TiO2
depleted, SiO2-rich, cherty FIII rhyolite representing the
stratigraphic footwall to the mineralization. The FIII rhyolite
exhibits pronounced negative Eu anomalies, low Zr/Y ratios and
low abundances of Sr. The geochemical importance of this felsic
rock package at Shihan is in its similarity to geochemical
signatures of felsic rock packages within productive,
multi-deposit, base-metal camps.
 The
mineralization consists of the following: stringers and pockets
of massive dark brown to resinous sphalerite and coarse
crystalline pyrite; small patches and stringers of chalcopyrite
and galena; and native silver, argentite and tetrahedrite. The
Zinc Zone strikes east-west, dips steeply south and has an
apparent plunge to the west.
The Ontario Department of Mines and Northern
Affairs selected two samples of massive mineralization to be
analyzed by the Laboratory and Research Branch of the Ontario
Department of Mines. Results of the samples are tabulated below:
Government Assays from Zinc Zone
|
Sample # |
Zinc-% |
Silver-g/t |
Copper-% |
Lead-% |
Gold-g/t |
|
1 |
14.10 |
695.30 |
0.10 |
0.80 |
2.06 |
|
2 |
7.60 |
621.30 |
2.15 |
trace |
2.05 |
In June 2006, Rockcliff, completed due
diligence grab sampling on the partially exposed surface
expression of the Zinc Zone. Samples were analyzed for zinc,
copper, lead, silver and gold. Results are tabulated on the
following page. Rockcliff Assays of Zinc
Zone
|
SAMPLE |
ZINC-% |
COPPER-% |
LEAD-% |
SILVER-ppm |
GOLD-ppb |
HOST/SULFIDE |
|
41301 |
58.15 |
0.02 |
0.64 |
66.6 |
56 |
m.s. |
|
41302 |
59.60 |
0.02 |
1.14 |
113.8 |
48 |
m.s |
|
41303 |
51.50 |
0.04 |
0.85 |
237.4 |
125 |
m.s |
|
41304 |
53.00 |
0.07 |
0.65 |
158.7 |
112 |
m.s |
|
41305 |
48.50 |
0.05 |
0.34 |
143.7 |
248 |
m.s |
|
41306 |
0.49 |
0.01 |
1.16 |
179.4 |
301 |
oxidized q.s.s. |
|
41307 |
21.74 |
0.12 |
0.11 |
200.7 |
180 |
sheared s.m.s. |
|
41308 |
14.74 |
0.14 |
0.08 |
81.5 |
413 |
sheared s.m.s. |
|
41309 |
6.92 |
0.05 |
0.05 |
36.2 |
264 |
str.sulfide |
|
41310 |
3.25 |
0.30 |
0.10 |
140.5 |
182 |
cherty rhyolite |
|
41311 |
10.65 |
0.28 |
0.04 |
75.8 |
617 |
s.m.s. rhyolite |
|
41312 |
0.06 |
0.01 |
0.03 |
128.1 |
176 |
massive pyrite |
|
41313 |
4.88 |
0.21 |
0.02 |
65.1 |
114 |
q.s.s.-s.m.s. |
|
41314 |
2.97 |
2.97 |
0.03 |
297.6 |
452 |
stringer sulfide |
|
41315 |
1.57 |
0.04 |
0.01 |
68.0 |
104 |
q.s.s.-py.str. |
|
41316 |
0.66 |
0.03 |
0.03 |
24.9 |
493 |
sheared q.s.s. |
|
41317 |
0.02 |
0.40 |
0.01 |
41.3 |
710 |
sheared q.s.s |
m.s. = massive sulfide, q.s.s. = quartz
sericite schist, s.m.s. = semi massive sulfide,
str. = stringer, py. = pyrite
|
