Linear Metals Commences Drill Program at La Morena Copper-Lead-Zinc-Silver-Gold Project
HALIFAX, NOVA SCOTIA -- (Marketwire) -- 10/26/10 -- Linear Metals Corporation ('Linear') (TSX: LRM) is pleased to announce that it is commencing a minimum 1,500 metre ('m') drill program at its 100% owned La Morena project in Coahuilla State, Northern Mexico. The drill program will test prospective Carbonate Replacement Deposit ('CRD') targets generated through a recently completed induced polarization ('IP') survey as well as new recently discovered artisanal workings.
Recent exploration on the northern part of the La Morena project, referred to as the Refugio Grid, has discovered numerous additional old artisanal mine workings beyond what was mapped by the JICA/CRM(i) joint venture in the late 1970's. Within the Refugio Grid area, Linear's previous exploration was limited to collection of a few grab samples of the known workings. Recent sampling of the artisanal workings, both known and recently discovered, has returned impressive silver and base metal grades from sub-horizontal 'manto' and sub-vertical 'chimney' or fault-hosted mineralization including the following highlights (unless otherwise indicated, sample is a multi-kilogram, random-grab composite from the tip pile; chip samples are taken across the width or thickness of the workings, where possible):
Highlights of Mine Sampling:
-- Mina Porfido: 6.6% lead, 17.1% zinc, 249 g/t silver, and 0.32 g/t gold;
-- Mina Sur #1: 5.1% lead, 19.4% zinc, 2.5% Cu and 1095 g/t silver;
-- Mina Sur #1: 14.1% lead, 4.8% zinc, and 781 g/t silver over 2.5 m;
-- Mina Midway: 6.5% lead, 883 g/t silver, and 0.68 g/t gold;
-- La Morena #1: 10.5% lead and 402 g/t silver over 2.5 m;
-- Mina Diablo: 3.1% copper, 4.9% zinc, and 10 g/t silver over 2.0 m.
The La Morena project covers an area of 2700 hectares (4.3 km x 6.1 km) and is located approximately 250 kilometres ('km') southeast of Chihuahua. The project is located within a known belt of deformed sediments that host CRDs such as MAG Silver's recent Cinco de Mayo discovery. La Morena is located along a prominent regional northwest trending fault, in a similar sequence of Lower Cretaceous limestones, marked by a prominent zone of recrystallization and alteration approximately 2 km x 4 km; the altered zone is situated over the edge of a large regional airborne magnetic high feature that is presumed to be a parental intrusion at depth.
IP Survey
Linear has received most of the final maps from the recently completed IP survey on the Diana (south) and Refugio (north) grids. The two grids are separated by a large, rugged NW-trending fault scarp which is largely inaccessible. The survey has identified an anomaly at moderate depth (approximately 150 m) on the Refugio Grid (interpretation in progress) as well as delineating a large anomaly at 300 m plus depth on the Diana Grid. Previous drilling has not tested areas of the project outside of the Diana Grid, particularly the Refugio Grid, which will be targeted as part of the current drill program. Previous drilling also did not test the potential for deeper, sub-horizontal manto and skarn mineralization in the Diana Grid area.
The new IP targets are located within the large alteration halo, variously underlain by limestone and limey shale of the Aurora, La Pena and El Cupido Formations. The latter two Formations are particularly prospective regionally, as they host numerous CRD deposits such as Providencia-Concepcion Del Oro.
Refugio Grid Targets
Follow-up of satellite colour anomalies and historic soil and stream sediment anomalies resulted in the discovery of several additional historic artisanal mines in the grid area (see website for location map). In the NW grid area, a series of four new showings and workings align along a prominent NE-trending structural corridor that corresponds to a high copper in soils anomaly. Along this trend, most of the workings (Porfido, Midway, La Morena) exploited mineralization hosted in the faults, although Infierno and Diablo at the south end of the trend show indications of both chimney and manto styles. At surface, mineralization is up to four metres in width. Testing the continuity of the mineralization between and beneath these limited workings represents a high priority exploration target that will be tested with the current drill program.
In the SE half of the Refugio Grid, 750 m south of the historically known El Refugio #2 workings, an additional group of workings (Mina Sur) were discovered. Similar to El Refugio, the mantos are located in the sub-horizontal hinges of relatively small and gentle antiforms at or near the Aurora-La Pena contact, and are up to three metres thick where exposed in the workings. Additional mapping is required to determine if El Refugio and Mina Sur are located within the same antiform trend, but, in either case, the on-strike continuation of the mineralization at shallow depth, away from the limited workings, forms a high priority drill target.
The Refugio IP anomaly in part underlays these workings, as well as partially underlying a 500 m x 300 m area in the central part of the grid which has highly anomalous Zn-Pb-Ag in soil values (also, the Mina Sur antiform trends directly towards the soil anomaly). Initial indications from the IP data are that there is a zone of moderate chargeability from 300 to 500 m wide, at a depth of approximately 150 m, extending from at least L2700N to L3100N (open). On this grid, the depth of the anomaly corresponds to the probable depth of the prospective Cupido Formation, and the higher level (Aurora-La Pena contact) mineralization historically exploited in the artisanal workings at surface may be the upper expressions of a larger mineralized system at depth. The IP anomaly will be tested during the current drill program.
Diana Grid Targets
The prominent chargeability and resistivity anomaly delineated beneath the Diana Grid occurs at a depth of at least 300 m, again, probably corresponding to the depth of the Cupido Formation, and is closest to surface at the north end of the grid on L1700N, extending south to L800N, beyond which it is gradually lost beneath the deep penetration of the IP survey (stratigraphy dips gently at about 20 degrees to the south). The anomaly pinches and swells in width along this trend, from a minimum of about 200 m to a maximum of about 750 m (as modeled by the inversion software). Previous drilling on the Diana Grid was not deep enough to test the heart of this anomaly, so one deeper hole of approximately 400 to 500 m will test the anomaly where it is closest to surface (L1700N).
'We are very excited to initiate this drill program at La Morena as we have a great mix of high-grade, near-surface manto targets on the Refugio Grid, as well as some large deeper targets that may be more skarn-related on the Diana Grid,' says Matt Rees, Vice President of Exploration. 'Overall, the more work we complete at La Morena, the more potential we seem to have for an extensive, multi-horizon mineralized system, similar to some of the well-known examples in this belt.'
This press release was prepared under the supervision of Matthew Ian Rees, P.Geo., VP Exploration for Linear Metals, who is a Qualified Person as defined under National Instrument 43-101. Mr. Rees has reviewed the scientific and technical information in this press release. Note that the interpretation of the IP data is still partially preliminary, especially on the Refugio Grid, and that geophysical inversions are non-unique and subject to the assumptions and model characterization employed.
(i) Historic exploration in the region, and on the immediate property, was undertaken as a joint venture between the Consejo de Recursos Minerales ('CRM') and Metal Mining Agency of Japan ('MMAJ') under the umbrella of Japanese International Cooperation Agency ('JICA'), in the mid to late 1970's.
Forward-Looking Information:
This release includes certain statements that may be deemed 'forward-looking statements'. All statements in this release, other than statements of historical facts, that address future production, reserve potential, continuity of mineralization, exploration drilling, exploitation activities and events or developments that the Company expects are forward-looking statements. Although the Company believes that the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those in the forward-looking statements. There is no known ore at LaMorena and there is no assurance that the mineralization at LaMorena will ever be classified as ore. The likelihood of future mining at LaMorena is subject to a large number of risks and will require achievement of a number of technical, economic and legal objectives, including obtaining necessary mining and construction permits, completion of pre-feasibility and final feasibility studies, preparation of all necessary engineering for pits and processing facilities as well as receipt of significant additional financing to fund these objectives, as well as funding mine construction. Such funding may not be available to the Company on acceptable terms or on any terms at all. For more information on the Company and the risk factors inherent in its business, investors should review the Company's Annual Information Form at www.sedar.com.
The TSX Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.
Contacts:
Linear Metals Corporation
Brian MacEachen
President and Chief Executive Officer
(902) 482-1240
www.linearmetals.com