Argentina Exploration Update

(“ECR Minerals”, “ECR” or the “Company”)

ECR Minerals plc is pleased to provide the following update on exploration within its Sierra de las Minas gold project area in La Rioja Province, Argentina.

  • High grades including 32.5 g/t gold, 21.9 g/t gold and 14.5 g/t gold returned by surface geochemical sampling of 13 prospects
  • Maestro Agüero prospect identified as a high grade quartz vein system with a minimum strike length of 350m
  • Geophysical survey at El Abra gold prospect to commence during September

ECR commenced the second phase of its 2011 sampling programme for the Sierra de las Minas gold project area, in which the Company holds a 100% interest, in late July. The objective of this phase has been to evaluate known prospects within the project area and prioritise them for further exploration. The first phase of the programme was completed earlier in the year at the El Abra prospect, yielding numerous high grade results. For more information please refer to the Company’s announcement dated 15 May 2011.

Assay results for 58 samples taken during July and August have now been received, with the best results given in the table below. Assay results are awaited for a further 25 samples. Historic results reportedly obtained from the same prospects by La Plata Gold, a Canadian company which conducted exploration in the Sierra de las Minas area during the 1990s and early 2000s, are also included in the table for comparison purposes. The Company considers the divergence between its sampling results and those of La Plata Gold for the same prospects to be within expected bounds. It was not the Company’s objective to resample the precise locations sampled by La Plata Gold.

All samples specified in the table below were prepared for fire assay and ICP elemental analysis by ACME Analytical Laboratories in Mendoza, Argentina. ACME Analytical Laboratories is certified to ISO 9001 and ISO/IEC 17025 standards.


Sample ID & Prospect Au g/t La Plata Gold Sample ID Au g/t

Maestro Agüero

J11SLM246 2.00 4000 88.37
J11SLM247 13.20 4001 33.20
J11SLM248 21.90 4002 27.52
J11SLM251 6.00 4003 10.20
J11SLM252 4.30 4004 2.08
J11SLM254 6.50

J11SLM257 4.70

J11SLM258 11.80

Mina San Antonio

J11SLM208 1.10 3961 4.99
J11SLM210 14.60 3962 0.01
J11SLM211 13.50

Casas Viejas

J11SLM221 0.08 3925 3.54
J11SLM218 32.50 3926 36.00
J11SLM221 14.50

Mina Azul

J11SLM204 15.30

Casa Viejas Body

J11SLM225 0.33

Agua de las Burras

J11SLM285 4.70

J11SLM286 0.20

J11SLM288 0.70

Burro Blanco

J11SLM280 11.90

J11SLM281 1.50

Veta Oculta

J11SLM270 1.50


J11SLM282 6.80


The majority of the 13 prospects sampled by the Company during July and August present as mineralised outcropping “pod” systems integrated into localised and regional shear structures. On the surface mineralisation occurs as discontinuous quartz veins embedded in shear belts.

Of these 13 prospects, four (Maestro Agüero, Mina San Antonio, Casa Viejas and Mina Azul, representing a combined potential strike length of approximately 800m) are judged to be priority targets for further work. Anomalous base metal values, including high grade copper, were returned at a number of the prospects, and further exploration will proceed with a view to ascertaining whether these base metal values are of economic significance.

Maestro Agüero is at present considered to be the Company’s highest priority target at Sierra de las Minas, aside from the El Abra prospect. Preliminary investigation indicates that Maestro Agüero is a shear hosted vein system with a strike length demonstrated by outcropping of some 350m and inferred continuity exceeding 550m. The outcropping quartz veins within the shear show abundant haematite, copper oxide and visible gold mineralisation.

More detailed sampling of Maestro Agüero, Mina San Antonio, Casa Viejas and Mina Azul is planned. The Company will also proceed to evaluate and prioritise additional prospects through preliminary mapping and sampling. Only around 30 per cent of the prospects known to exist within the Sierra de las Minas project area have been sampled by the Company so far.

A ground based pole-dipole geophysical survey is scheduled to commence at the El Abra prospect later this month. This survey will aid detailed planning of the 1-2,000m drilling programme proposed to take place at El Abra later this year. The drilling programme will commence at the El Abra prospect but could potentially be extended to encompass other prospects within the Sierra de las Minas project area.

Patrick Harford, Managing Director of ECR Minerals plc, comments:

“The achievement of consistent high grade assays from sampling in the Sierras Las Minas complex continues to generate excitement within ECR, and further work will now begin to focus on developing our knowledge of zones that may be economic to mine.

The Company has sampled approximately 2km of vein length at Sierra de las Minas so far, and with mineralised widths at surface frequently exceeding one metre and samples obtained to date from sections identified as potentially suitable for selective mining returning an average grade greater than 8 g/t gold, the possibility of mining and transporting high grade ores to an existing plant elsewhere may now be considered. This may provide an inexpensive and relatively rapid route to cashflow from the Sierra de las Minas project.

The geophysical programme due to commence at El Abra this month is expected to enhance our geological understanding of the prospect enormously and is intended to allow ECR to derive maximum value from the proposed drilling programme, which will have the objective of confirming the grade and extent of mineralisation at depth.

It should be noted that in the Sierras de las Minas region only 10 historic drill holes are known to have been completed. Six of these holes targeted the Las Callanas vein set, which lies to the southwest of El Abra outside the ECR project area. The best Las Callanas intersection reported was 24.3 g/t gold from 143.9-144.5m down hole, demonstrating not only continuity of vein thickness but also the presence of high grade mineralisation at depth. The Company considers this to be encouraging from the point of view of its proposed drilling at El Abra.”

About ECR Minerals

ECR is a mineral development company with interests in the USA, Argentina, Indonesia, Thailand and Australia.


For further information please contact:

ECR Minerals plc
Michael Silver, Chairman Tel: +44 (0) 20 7929 1010
Patrick Harford, Managing Director
Stephen Clayson, Director
Luca Tenuta, Non-Executive Director
Email:This email address is being protected from spambots. You need JavaScript enabled to view it.
Daniel Stewart & Company plc
Oliver Rigby/Tessa Smith Tel: +44 (0) 20 7776 6550
Old Park Lane Capital plc
Michael Parnes Tel: +44 (0) 20 7493 8188
Blythe Weigh Communications
Ana Ribeiro Tel: +44 (0)20 7138 3204
Barry Kaplan Associates
Larry Kaplan Tel: +1 732 747 0702

Mr Howard Coates MSc., P.Geo, Vice President and Partner of MPH Consulting Ltd, who has more than 40 years of experience in the mining and exploration industry, is acting as a geological consultant to ECR with respect to its activities in Argentina. Mr Coates has reviewed the contents of this announcement.

Historic exploration results have not been verified by the Company or by MPH Consulting Ltd.


Au: chemical symbol for gold
g/t: grams per tonne
m: metre

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