Tigray Resources (TIG-V) drills 12.28 m of 12.25 g/t Au at Adyabo
July 16, 2013 - News Release
Tigray Resources Inc. has released assay results from its phase one drill program on the Adyabo property in northern Ethiopia, which comprised five diamond drill holes at the Mato Bula prospect and one drill hole at the Mato Bula North prospect. Five diamond drill holes at the Mato Bula prospect tested approximately 500 metres of strike and one drill hole tested the Mato Bula North prospect situated one kilometre to the northeast of the Mato Bula prospect. New encouraging geochemical results for Da Tambuk (trench sampling of four metres at 14.53 grams per tonne gold), approximately three kilometres along strike of the Mato Bula North prospect, are also presented, advancing the prospectivity of this new emerging target.
Key intersections
Mato Bula Upper lode:
- 12.28 metres grading 12.25 grams per tonne gold and 0.30 per cent copper from 86.2 metres, including 5.29 metres grading 22.33 grams per tonne gold and 0.30 per cent copper (WMD006);
- 8.20 metres grading 4.90 grams per tonne gold and 0.73 per cent copper from 127.10 metres, including 5.75 metres grading 6.40 grams per tonne gold and 0.94 per cent copper (WMD004).
Mato Bula Main lode:
- 17.57 metres grading 4.20 grams per tonne gold and 1.05 per cent copper from 56.05 metres (WMD004);
- 6.61 metres grading 5.30 grams per tonne gold and 0.26 per cent copper, from 82.48 metres (WMD005);
- 13.51 metres grading 15.15 grams per tonne gold and 0.06 per cent copper, including 0.70 metre grading 284.50 grams per tonne gold and 0.04 per cent copper, from 53.31 metres (WMD006);
- Five metres grading 8.77 grams per tonne gold and 0.92 per cent copper, including three metres grading 12.84 grams per tonne gold and 1.36 per cent copper, from 92.14 metres (WMD002);
- 3.10 metres grading 4.25 grams per tonne gold and 1.10 per cent copper, from 124.90 metres (WMD003).
Mato Bula North:
- 17.35 metres grading 1.65 per cent copper and 0.40 gram per tonne gold, including 11.55 metres grading 2.05 per cent copper and 0.47 gram per tonne gold, from 53.80 metres (WMD001).
Mato Bula
The high-grade gold mineralization at Mato Bula is associated with chalcopyrite-rich quartz veins hosted within a silica-sericite-chlorite-pyrite alteration zone. Recent rock chip and trench sampling at Mato Bula delineated a well-defined surface target over 800 metres long including three gold-bearing mineralized lodes (refer to Tigray's news release dated Jan. 24, 2013), within a two-kilometre-long geochemical copper-gold anomalous zone. The lodes from northwest to southeast comprise the Upper lode, the Main lode (main gold artisanal workings) and the Lower lode, defining a 70-to-85-metre-wide target zone. The five holes at Mato Bula tested part of this target, between 35 metres and 120 metres below surface on five drill sections spaced at 60 metres to 220 metres apart, with best grade mineralization beneath the base of oxidation. It is significant to note that the thickest high-grade intercepts from the drilling at Mato Bula are on the most southerly and northerly of the five sections drilled and thus the target is open in all directions. Further diamond drilling is required to test this gold mineralization along strike, down plunge and down dip.
Mato Bula North
Mato Bula North is a 200-metre-long malachite-rich silica alteration zone (hill) with abundant copper-rich porphyry dikes, and adjacent gold surface targets as defined by soil geochemistry. Significant copper was previously defined at Mato Bula North where trench 08 chip samples returned nine metres at 0.87 per cent copper (remaining open to the west). Drilling has defined disseminated, stringer, vein and massive-sulphide-vein-style copper-gold mineralization associated with very intense silica alteration. WMD001 has tested part of the target, but the drill hole required abandonment short of the planned 145-metre final depth. It is interpreted that the hole did not fully test the entire target, as defined from surface showings.
Da Tambuk
New infill soil sampling results and channel sampling from two trenches for Da Tambuk have recently been received (refer to Tigray's news release dated Jan. 24, 2013, for previous results). Da Tambuk is approximately four kilometres north-northeast and along strike of Mato Bula. Soil sampling at 40 by 40 metres has highlighted a 1.5-kilometre-long greater-than-50-part-per-billion-gold anomaly over an intense sericite alteration zone with variable silica alteration and zones of sulphide. Trenching over the northern end of the soil anomaly has encountered 16 metres at 3.95 grams per tonne gold (trench ADT004 with two-metre continuous rock chip channel sampling), including four metres at 14.53 grams per tonne gold. Multiple trenches over the target are now being completed for follow-up. The discovery of high-grade mineralization at Mato Bula and Da Tambuk has significantly enhanced the overall prospectivity of the 5.5-kilometre trend of mineralization.
Deposit style
Although exploration is at an early stage, the geological setting with volcanic and volcaniclastic rocks and associated chert and limestone, the associated schistose sericite-chlorite alteration assemblages, and both high-grade gold with lesser, but significant, copper and thicker zones of lower-grade copper-gold mineralization suggest that this is a deposit style or variant not previously discovered in the Arabian-Nubian shield in northern Ethiopia. The Mato Bula prospect occurs in a province in which there are known VMS deposits, and there are both zinc-lead soil anomalies and barite horizons defined in the vicinity. At this stage further drilling will be required to test the full potential of this system of new prospects.
Quality control
The planning, execution and monitoring of Tigray's quality control programs at the Harvest project are under the supervision of Jeff Heidema, PGeo, Tigray's vice-president, exploration. Mr. Heidema is a qualified person as defined by National Instrument 43-101. Diamond drill core samples have undergone preliminary preparation at the Acme Laboratories facility in Ankara, Turkey, and are crushed to 80 per cent passing 10 mesh, and pulverized to 85 per cent passing 200 mesh (Acme R200-1000 package). Analyses are conducted at Acme Laboratories in Vancouver, utilizing aqua regia digestion and ICP-ES for base metal and silver analyses. Gold analyses are conducted via fire assay fusion with AA finish, and gravimetric analyses are completed for overlimit samples. Blanks and certified reference standards are inserted into the sample stream to monitor laboratory performance. Duplicate samples are inserted into the sample stream to both monitor laboratory performance and also characterize potential mineralization.
We seek Safe Harbor. |
