Los Andes Copper Ltd.

Los Andes Copper Ltd.

October 02, 2007 09:01 ET

Los Andes Intersects 220 Metres Grading 0.52% Cu and 0.015% Mo in Ongoing Drilling at the Vizcachitas Project

Includes 44 metres grading 0.85% Cu and 0.015% Mo

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Oct. 2, 2007) - Los Andes Copper Ltd. ("Los Andes", or the "Company") (TSX VENTURE:LA)(PINK SHEETS:LSANF) announces the results for six holes from the Phase I drilling program at the Vizcachitas copper-molybdenum property in Chile. The aim of the drill program is to confirm the historical drilling carried out in the 1990s; to upgrade inferred resources to the indicated category; and to test for extensions of the known mineralization to the south and east (See News releases dated May 15 and July 7, 2007).

All six holes intersected significant mineralization, including 220 metres grading 0.52% copper and 0.015% molybdenum (0.61% Cu Equivalent(i)) that included a higher grade interval of 0.85% Cu and 0.015% Mo (0.95% Cu Equivalent(i)) between 36 and 80 metres in hole LAV-72. Highlights of the copper and molybdenum grades encountered in all six holes are listed in the table below. Drill hole location maps, sections and photos of drill core can be viewed at the Los Andes website www.losandescopper.com.

Depth From To interval CuT Mo CuEq
Hole ID (m) (m) (m) (m) (%) (%) %(i)
LAV-67 240 26 240 214 0.38 0.026 0.55
including 52 176 124 0.49 0.027 0.67
Including 52 78 26 0.59 0.021 0.73
LAV-68 250 58 250 192 0.46 0.013 0.55
including 58 196 138 0.54 0.010 0.61
including 78 168 90 0.70 0.011 0.77
including 96 122 26 0.99 0.014 1.08
LAV-69 200 42 200 158 0.41 0.013 0.50
including 56 114 58 0.49 0.016 0.60
LAV-70 210 0 210 210 0.28 0.005 '-
including 10 102 92 0.40 0.007 '-
including 18 68 50 0.48 0.006 '-
including 18 50 32 0.51 0.006 '-
LAV-71 Results pending
LAV-72 250 15 250 235 0.49 0.014 0.58
including 30 250 220 0.52 0.015 0.61
including 34 132 98 0.70 0.013 0.79
including 36 80 44 0.85 0.015 0.95
LAV-73 Results pending
LAV-74 Results pending
LAV-75 358 8.4 358 349.6 0.37 0.008 -
including 48 218 170 0.40 0.007 '-
including 48 58 10 0.65 0.007 '-
(i) Copper equivalent is calculated for Mo values greater than
0.01% using US$1.50/lb Cu and US$10.00/lb Mo according to the
formula CuEq% equals Cu% + (Mo% x 10.00/1.50) and is not adjusted
for metallurgical recoveries or net smelter return which remain
uncertain and are assumed to be 100%.

Roger Moss, President and CEO of Los Andes commented as follows: "We are very pleased with the latest results from the ongoing drilling at Vizcachitas. Higher grade intervals in LAV-68 and LAV-72 suggest the possibility of a high grade zone in the southwest. LAV-82, collared 100 metres southeast of LAV-72, is currently being drilled to test the potential of this possible zone. Holes LAV-70 and LAV-75 drilled to test the periphery of the currently known mineralized area both came up with 0.4% Cu over significant widths indicating potential to expand to the east and west, respectively."

Discussion of results

LAV-67 and LAV-68 are infill holes located to the west of the Rio Rocin on Section 1200NE. LAV-67 was drilled to the east at an inclination of -80 degrees to a total depth of 240 metres. It intersected primary sulphide mineralization (chalcopyrite and pyrite with minor covellite and chalcocite) in altered granodiorite and diorite. The higher molybdenum grades in this hole, grading 0.031% Mo over 76 metres, is due to well developed molybdenite contained in quartz veins.

LAV-68 was collared 200m southeast of LAV-67 and drilled at -70 degrees to the northwest. Primary mineralization occurs throughout the hole which intersected alternating granodiorite and diorite. Chalcocite occurs as partial replacement of pyrite down to a depth of 145 metres.

LAV-69, collared approximately 200m north of LAV-68, was also drilled at -70 degrees to the northwest to fill a large gap in the previous drilling. The hole intersected variably altered diorite, with moderate to strong sulphide mineralization in the upper portion of the hole.

LAV-70 was drilled at -75 degrees to the southeast to test the eastern margin of the known mineralization. The hole intersected variably mineralized andesite, over the entire length.

LAV-72 was collared 100 metres south of LAV-68 and drilled on -70 degrees to the northwest, to test the southwestward extension of the high grade mineralization intersected in LAV-68. The hole intersected porphyritic andesite in the top of the hole, followed by granodiorite to the end of the hole at 250 metres. Chalcocite and covellite, in addition to chalcopyrite, occur in the drill core over the first 50 metres beneath the overburden.

LAV-75 was drilled at an inclination of -65 degrees to the northwest to test the western margin of the mineralization. The hole encountered granodiorite and diorite with quartz-sericite alteration typically overprinting a biotite-magnetite-chlorite assemblage. The upper 48 metres of granodiorite is partially leached, with resulting low grades. Copper grade increases thereafter due to stronger chalcopyrite mineralization.

Roger Moss, Ph.D., P.Geo, is the qualified person as defined by national Instrument 43-101 for the Vizcachitas Project. Logging, sampling and splitting of the drill core is conducted at the Vizcachitas site by independent consultants Geologica LTDA. under the direct supervision of geologist Ramon Fam. Samples are securely transported by Geologica staff to the SGS Laboratory in Santiago Chile and analyzed for copper and molybdenum by atomic absorption following a three acid digestion. Los Andes routinely inserts standards and blanks into the sample stream and sends 5% of sample rejects to Actlabs for check analysis.

About Vizcachitas

The Vizcachitas Project offers potential for a low strip, open pit operation in an area of low elevation with excellent infrastructure, including water and power in central Chile. The Vizcachitas deposit occurs in the same metallogenic belt as the large copper-molybdenum porphyries Rio Blanco-Los Bronces, Los Pelambres-El Pachon and El Teniente. Based on 68 drill holes previously completed by General Minerals Corporation and Placer Dome, the project contains an indicated resource of 144 million tonnes grading 0.52% copper and 0.015% molybdenum and an inferred resource of 211 million tonnes grading 0.46% copper and 0.016% molybdenum, at a 0.40% copper cut-off, as detailed in the NI43-101 compliant technical report of A.C.A. Howe International Limited dated February 7, 2007. The technical report, as well as additional information about the Vizcachitas Project is available on our website at www.losandescopper.com.

This document contains certain forward looking statements which involve known and unknown risks, delays and uncertainties not under the Company's control which may cause actual results, performance or achievements of the Company to be materially different from the results, performance or expectation implied by these forward looking statements.

The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.

Contact Information