Gold Price: US $1,386.2/ounce
Magellan Drills 4m @ 5.49g/t Gold at Jerimum Cima Zone, Cuiu Cuiu Project, Brazil
February 21, 2012
Vancouver, BC, February 21, 2012 – Magellan Minerals Ltd. (TSX-V: MNM, OTCQX: MAGNF) (“Magellan”) is pleased to announce the results of 14 additional exploration holes recently drilled at the Jerimum Cima, Jerimum Baixo and Moreira Gomes zones at the Cuiu Cuiu project in northern Brazil.
Five additional exploration holes were drilled at Jerimum Cima during late 2011. Jerimum Cima is a strong gold-in-soil anomaly located 3km NE of the Central deposit and 4km NW of the Moreira Gomes deposit. Previous reconnaissance drilling on this target returned values of 39m @ 5.13 g/t gold in hole 26 and 18m @ 1.17 g/t gold in hole 24 associate with sheeted veins in a granitic host rock. This area is also known to have contained some of the richest alluvial gold deposits in the Cuiu Cuiu area. No resource has been calculated thus far at Jerimum Cima.
Previous surface mapping and an interpretation of the airborne magnetic data suggest a ENE-WSW orientation to the zone of sheeted veins previously intersected in holes 24 and 26. Of the five exploration holes drilled during 2011, three were designed to test the eastern extension of the zone over a strike extent of 500m, one hole was designed to test a magnetic target and one hole was drilled approximately 1km east of holes 24 and 26 under an abandoned garimpo placer working.
Of the three holes drilled along strike to the east of holes 24 and 26, one hole (161) intersected 1m @ 4.30 g/t gold and 4m @ 5.49 g/t gold including 0.5m @ 35.1 g/t gold and was drilled 325m east of hole 26 which intersected 39m @ 5.13 g/t gold. Hole 162 which was drilled 500m east of hole 26 cut 4.5m @ 0.80 g/t gold (see map on website).
Gold mineralization at Jerimum Cima has now been traced over approximately 550m and appears to be confined to narrower high grade structures compared to mineralization identified at Central, Central North, Moreira Gomes and Jerimum Baixo. Further infill drilling will be required along the ENE-WSW trending Jerimum Cima structure which is sub-parallel to the Moreira Gomes zone located 4km to the south east.
Drill hole intersections are summarized in the following table:
* All holes were drilled at -50°. Dips of the intersected structures are not known, and intersection widths are not necessarily true widths
Results have also been received on six additional exploration holes from the Jerimum Baixo target zone which is located 3km ESE of the Central deposit and 1.5km NW of the Moreira Gomes deposit. This brings the total number of holes completed to date at Jerimum Baixo to fifteen.
Previous drilling on this target has returned values of 105m @ 0.60 g/t gold including 41m @ 1.29 g/t gold in hole 94, 38m @ 0.67 g/t gold in hole 98, 57.4m @ 0.51 g/t gold in hole 10 and 25m @ 0.49 g/t gold in hole 137 (see press release dated 15th November, 2010). Significant holes reported here include hole 141 which was drilled 50m SE of hole 94 (which cut 105.2m @ 0.60 g/t gold) and intersected 41m @ 0.56 g/t gold from 17.1 to 58.1m depth and 33m @ 0.28 g/t gold from 92.1 to 125.1m depth (see map on website).
Hole 146 also intersected 18m @ 0.39g/t gold from 202.5 to 220.5m depth which almost certainly represents the same zone cut in holes 91 (30.4m @ 0.40 g/t gold) and hole 95 (54m @ 0.39g/t gold).
The 2011 drill program at Jerimum Baixo has confirmed the existence of a mineralized body which is currently smaller and lower grade than the nearby Moreira Gomes deposit located 1.5km to the south-east. More significantly, gold mineralization above the 0.3g/t gold cut-off grade is consistent over a strike length of 450m and remains open to the east. Further drilling is required to fully define the dimensions of the mineralized zone.
Results were returned on three additional holes from Moreira Gomes. Hole 149 was drilled on the eastern edge of the known mineralization at Moreira Gomes, 115m east of the previous most easterly hole 122 (8.2m @ 0.37 g/t gold and 18.4m @ 0.46 g/t gold (see press release dated August 31, 2011) and intersected 9m @ 0.34 g/t gold and 16m @ 0.26 g/t gold (see map on website). This is almost certainly the same zone and indicates that the Moreira Gomes body continues to remain open to the east. Drilling has now extended the Moreira Gomes mineralized zone a total of 250m beyond the eastern limit to the orebody as defined in the 43-101 resource estimate of early 2011 (see press release dated 8th March 2011).
Hole 145 was an exploration hole drilled north of the main Moreira Gomes zone and east of the main body. It intersected a narrow high grade vein structure which returned 0.6m @ 8.44 g/t gold from 216.0 to 216.6m depth. This intersection is a narrow vein located 100m SE of the Machiche vein structure which returned 3.3m @ 7.43 g/t gold in hole 52 (see map on website).
The Moreira Gomes and Central deposits at Cuiu Cuiu currently comprise published resources of 1.2Moz (31Mt @ 1.2 g/t) of gold in the inferred category and 0.1Moz (3.4Mt @ 1.0g/t) of gold in the indicated category. The published block model inventory for the Central and Moreira Gomes deposits at a 0.30 g/t gold cut-off comprises 3.5Mt @ 1.0 g/t gold for 110,000 oz of contained gold and 45Mt @ 1.0 g/t gold for 1.4Moz of contained gold.
Holes were drilled at 50 degrees from horizontal. All core samples (HQ diameter) were cut with a diamond saw and one-half of the core placed in bags, numbered and sealed then sent via a secure transport agency to the Company’s office in Itaituba before shipping via secure transport to ACME preparation laboratory in Itaituba for sample preparation. Core samples were crushed down to 2 mm and a 1 kg split was pulverized to better than 85% minus 200 mesh. From Itaituba, ACME sent the pulp samples to Santiago, Chile for assaying. Gold analyses were conducted on 30g representative sample cuts using fire assay with an atomic absorption finish. Other sample cuts were subjected to a 4 acid digestion and analysed for silver and an additional 35 elements using inductively coupled plasma mass spectrometry (ICP-MS). ACME is an ISO 9001 registered laboratory and has a quality control program in place which includes the insertion of standard, blank, and duplicate samples, as well as conducting repeat analyses.
Magellan’s QA/QC program also includes the insertion of standards, field duplicates and blank material in the sample sequence with the normal core samples to monitor sampling variances, laboratory precision and accuracy.
This press release was reviewed by Dennis Moore, B.Sc., M.Eng., a member of AIG, AUSIMM, and the SEG, a qualified person in compliance with National Instrument 43-101.
Magellan Minerals Ltd. (TSX-V: MNM) is a TSX Venture Exchange listed exploration company with a number of gold exploration properties in the Tapajos region of northern Brazil and is focused on the Cuiu Cuiu and Coringa projects.
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The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release. This news release may contain forward-looking statements including but not limited to comments regarding the timing and content of upcoming work programs, geological interpretations, receipt of property titles, potential mineral recovery processes, etc. Forward-looking statements address future events and conditions and therefore, involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements.
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