ThomasEdwardLane.pdf

Nzn is situated in a fault hlmk defined by the coastline to the
west, Bellhum's Brwk Fault to the north, Brian's Pond Fault to the
east end Portland Creek Pand to the soutlr (Fig. 1.3). The upper st.
Csorge Gmp and sone rino deposits ere swsed on the Mike Leke Anti-
cline. 2 to 3 km west ~f the Brian's Pond Fmlt System. me Wike Lake
mticline is a north-trending, asmetric open Fold with 20° dips on the
eastern, faulted flank and gentle 5' dips to the Pouthwest (Fig. 1.0.
The mine enconposses a 16 km" arse wer which more than 15 ore
lenses are soattersa (Fig. 1.4). Thasa northeastrard to sedwerd-
oriented, curvilinear, pencll-shaped Wiea of 3% to 12% zinc have
dimensions of 10 to 3Gm wide by 3 ta 30m high by 500 to 1000m long. The
largely mined-out ore lenses total 1.2 million short tons of 8% zinc,
5.5 million tons of which ocmrred in the L and T Zones, 470,000 in the
A and X Zones. 450,000 tons in the c mno and 760,000 in other small
zones. The badies are stcatha within the upr 1D to 4hn of the
Cstoche Porntion and plunge southuest~ard 5000n down the gently dipping
west limb of the Hike Lake Anticline. Coarse crystalline, white sparry
doldtea desorDsd as pseudobrecsias in vein-riddled mcks envelops ths
sphalerite bodies which are located around the periphery of northeaat-
trendins stm~tuxal &pression%, faults and fracture zones (Fig. 1.4.
1.5). The structural depressions are elongate to cirrular, synsedi-
mntsru to early post-ssdhwntary fsstures associated with solution
brecsies, described as mek-matrix breccia. (Collins end Wth, 1975;
lane, 1984). The88 rock-mttix brecciar contain smll vague fragments
to angular netrescale blocks of dolostone witha a fins to medium
crystalline gray dolwite matrix. Iw grade mineralized zones, small
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