Drilling at Sanu's Koken Prospect Confirms a New Copper-Zinc-Gold VMS System in Western Eritrea
29 Ottobre 2008 - 4:41PM
Marketwired Canada
Sanu Resources Ltd. ("Sanu" or "the Company") (TSX VENTURE:SNU) is pleased to
announce the results of its recent drill program at the Koken prospect in
Western Eritrea. The Koken prospect is 75kms north of the Bisha gold-copper-zinc
VHMS orebody (Nevsun Resources) and 85kms north-northeast of Sanu's Hambok
zinc-copper massive sulfide deposit. Eight shallow scout holes were drilled
shortly after the initial discovery, taking advantage of a drill rig in the area
before the rainy season shutdown at the end of June. The initial reconnaissance
drill program successfully confirmed the presence of a new copper-zinc-gold
volcanogenic massive sulfide system with excellent exploration potential down
dip and along strike.
The Koken discovery (June 19, 2008 News Release) resulted from follow-up of
remote sensing anomalies. One set of anomalous pixels outlines the mineralized,
4.5km long gossan and enclosing altered felsic tuff. The gossan is on the
western limb of a gently north-dipping, 10km wide, synformal structure.
The drill program, based on surface geology and geochemistry, tested the
outcropping gossan-barite-alunite horizon over a strike length of 3.5km. Holes
intersected gossan as well as disseminated and massive sulfides with strongly
anomalous Cu, Zn, Pb, Au, Ag, and Ba in all holes. The best intersection (DDH
KOK-005) returned 5.1m of 1.69% Zn within 14.0m grading 0.94% Zn from 33.9m.
This hole also returned 2.0m of 1.14gpt Au from 28m. Drillhole KOK-008 returned
1.23gpt Au over 3.0m. Copper results ranged from 0.1 to 0.3% in the oxide zone
and 0.1 to 0.6% where present in the sulfide zone. From the drill information it
was established that the Koken massive sulfide horizon dips at approximately 15
degrees to the north and consists of multiple sulfide layers with a collective
thickness of 3 to 15m.
The Koken discovery represents the northern-most recognised occurrence of
VHMS-style mineralization in Western Eritrea to date. The zinc-copper-gold
geochemical signature is similar to that at Bisha and highlights the possibility
of a gold-rich VHMS deposit within the Koken basin or elsewhere on the volcanic
belt. The Koken discovery also shows the importance of processed Landsat imagery
for regional-scale area selection in NW Eritrea. Sanu crews will be actively
prospecting and sampling similar pixel anomalies on the Koken synform during the
coming months.
Sanu also plans a program of electrical and electromagnetic geophysical
surveying CSAMT as well as detailed gravity to the north and northwest of the
gossan outcrops to identify near surface zones of structurally or lithologically
thickened massive sulfide mineralization. Renewed drilling at Koken is
anticipated for the first quarter of 2009.
Selected assay results from the Koken drillholes are shown in the accompanying
table.
Drill core samples were split on site by diamond saw with half the core
submitted to African Horn Laboratories in Asmara for crushing and grinding. Core
is retained at Sanu's Mogoraib camp. One split of the prepared sample pulp was
airfreighted to Genalysis Laboratories in Perth Western Australia for analysis,
and the remainder retained in Sanu's warehouse in Asmara. High- and low-grade
sulfide and oxide standards constituting roughly 5% of the sample volume were
randomly inserted into the sample stream before shipment of the pulps to
Genalysis. Two duplicate samples were collected every 20 samples, one sent to
Genalysis Labs and one to ALS-Chemex in Vancouver. All sample data is stored in
a secure database on site in Asmara.
Koken Drillholes Summary Results
(1) cut-off values used in these averages: Zn greater than 0.1%, Cu
greater than 0.1%, Pb greater than 0.1%, Au greater than 0.5gpt, Ag
greater than 10gpt
---------------------------------------------------------------------------
Hole From To Int (m) Zn% Cu% Au ppm Ag ppm Pb%
---------------------------------------------------------------------------
KK-002 19.0 25.0 6.0 0.20 oxide
27.0 28.0 1.0 0.11 oxide
39.8 51.2 12.2 0.51 sulfide
inc 42.5 49.1 4.6 0.85 0.21
KK-003 2.0 18.0 16.0 0.22 oxide
22.0 30.0 8.0 0.31 oxide
24.0 42.0 18.0 25 oxide
inc 24.0 30.0 6.0 39
34.0 42.0 8.0 0.35 oxide
inc 40.0 42.0 2.0 0.74
---------------------------------------------------------------------------
---------------------------------------------------------------------------
KK-004 0.0 3.0 3.0 0.21 oxide
5.0 11.0 6.0 0.23 oxide
13.0 14.0 1.0 0.24 oxide
15.0 16.0 1.0 0.24 oxide
17.5 18.2 0.7 2.75 0.25 13 0.15 oxide
16.0 18.2 2.2 0.27 oxide
22.0 27.0 5.0 0.16 sulfide
29.0 30.0 1.0 0.10 sulfide
32.0 34.0 2.0 0.37 sulfide
35.0 36.0 1.0 1.12 sulfide
---------------------------------------------------------------------------
---------------------------------------------------------------------------
KK-005 1.0 3.0 2.0 0.13 oxide
4.0 9.0 5.0 0.14 oxide
4.0 5.0 1.0 0.29 oxide
11.0 12.0 1.0 0.22 oxide
14.0 16.0 2.0 0.12 oxide
20.0 22.0 2.0 0.19 oxide
28.0 33.0 5.0 0.15 oxide
28.0 30.0 2.0 1.14 oxide
33.9 48.0 14.1 0.94 sulfide
inc 33.9 39.0 5.1 1.69
33.9 37.0 3.1 0.53 sulfide
33.0 37.0 4.0 0.32 sulfide
33.9 35.9 2.0 0.2 sulfide
33.9 37.0 3.1 24 sulfide
39.0 42.0 3.0 0.41 sulfide
40.0 42.0 2.0 14 sulfide
41.0 42.0 1.0 0.41 sulfide
44.0 45.6 1.6 0.87 sulfide
inc 45.0 45.6 0.6 1.71
44.0 45.0 1.0 0.31
---------------------------------------------------------------------------
---------------------------------------------------------------------------
KK-006 32.0 33.0 1.0 0.65 0.17 sulfide
41.0 42.0 1.0 0.50 sulfide
46.0 48.0 2.0 0.48 sulfide
47.0 48.0 1.0 0.26 sulfide
---------------------------------------------------------------------------
---------------------------------------------------------------------------
KK-007 0.0 16.0 16.0 0.30 oxide
20.0 24.0 4.0 0.21 oxide
26.0 28.0 2.0 0.18 oxide
27.0 28.0 1.0 0.11 oxide
31.0 32.0 1.0 0.18 oxide
35.0 38.0 3.0 0.14 oxide
---------------------------------------------------------------------------
---------------------------------------------------------------------------
KK-008 22.0 26.0 4.0 0.18 sulfide
29.0 30.0 1.0 0.12 sulfide
34.0 37.0 3.0 0.12 sulfide
37.0 40.0 3.0 1.23 sulfide
39.0 40.0 1.0 13 0.15 sulfide
40.0 41.0 1.0 0.31 sulfide
---------------------------------------------------------------------------
---------------------------------------------------------------------------
KK-009 17.0 18.0 1.0 0.10 oxide
20.0 23.0 3.0 0.21 oxide
24.0 25.0 1.0 0.12 oxide
28.0 37.0 9.0 0.22 oxide
38.0 41.0 3.0 0.37 sulfide
39.0 41.0 2.0 0.35 sulfide
39.0 40.0 1.0 0.11 sulfide
45.0 46.0 1.0 0.63 sulfide
50.0 55.0 5.0 0.51 sulfide
53.0 54.0 1.0 0.16 sulfide
54.0 55.0 1.0 0.15 sulfide
---------------------------------------------------------------------------
Note:
1) KOK-001 abandoned due to poor recovery, redrilled as KOK-003
Intervals are core lengths and true widths may be less than reported here.
On Behalf of the Board,
Wojtek A. Wodzick, President and CEO
To view the maps accompanying this release please click on the following link:
http://media3.marketwire.com/docs/1029snu1.pdf
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