Vancouver, British Columbia - Prime Meridian Resources Corp. (TSXV: PMR) ('PMR' or the 'Company') is pleased to announce that the Company received the signed and notarized agreement (the 'Agreement') for the option to purchase (the 'Purchase Option') a 100-per-cent interest in the Cuatro Hermanos Porphyry Copper Project (the '4H Project'), located in Sonora, Mexico, 185 kilometres southeast of Hermosillo.
4H Project Overview:
10 concessions totalling 8,125 hectares which contains a large porphyry copper-molybdenum system with surface measurements of at least four kilometres east-west by two kilometres north-south.
Initial exploration work on the property by companies including Occidental Petroleum (1969), Amoco (1974-1975), Cominco (1981), BHP-Magma (1997) and Phelps Dodge (1998) was limited in overall extent.
Erosion has been sufficiently moderate so that a leached oxidized capping of 10 to 60 metres thickness has developed over the primary sulphides.
Secondary supergene chalcocite mineralization is present in a tabular zone at the base of oxidation and the presence of exotic copper mineralization, transported by acid sulphate surface waters into stream gravels and conglomerate indicates primary sulphides were oxidized, copper put into solution and acid copper sulphate solutions moved down and laterally.
Primary porphyry copper-molybdenum mineralization, mainly pyrite, chalcopyrite, and molybdenite, is present in quartz-veinlet stock works, disseminations and breccias associated with high level porphyritic intrusions of quartz monzonite to granodiorite and diorite compositions.
Brian Leeners, CEO of Prime Meridian, stated, 'The Cuatro Hermanos Copper Project is currently an 8-square kilometre, at-surface, copper and molybdenum system with near-term soluble copper (SXEW) production potential. The asset in its entirety versus the current value of PMR, represents tremendous leverage to rising copper and molybdenum prices which are beginning to reflect projected deficits in forward supply.'
Cautionary Note
The reader is cautioned that the historical resource estimates referenced in this release (the 'Historical Estimates') are considered historical in nature and as such is based on prior data and reports prepared by previous property owners. The reader is cautioned not to treat them, or any part of them, as current mineral resources or reserves. The Company has determined these historical resources are reliable, and relevant to be included here in that they demonstrate simply the mineral potential of the Project. A qualified person has not done sufficient work to classify the Historical Estimates as current resources and the Company is not treating the Historical Estimates as current resources. Significant data compilation, re-drilling, re-sampling and data verification may be required by a qualified person before the Historical Estimates can be classified as a current resource. There can be no ass0urance that any of the historical mineral resources, in whole or in part, will ever become economically viable. In addition, mineral resources are not mineral reserves and do not have demonstrated economic viability. Even if classified as a current resource, there is no certainty as to whether further exploration will result in any inferred mineral resources being upgraded to an indicated or measured mineral resource category.
Mineralization
Mineralization on the 4H Project consists of disseminated porphyry copper-molybdenum mineralization and peripheral exotic copper mineralization. Known centres of porphyry copper-molybdenum mineralization are the Main-Sulfate Zones, Cactus Zone, and the West Zone (Figure below). Sulphide mineralization is closely associated with the granite-quartz monzonite intrusive complex and associated hydrothermal brecciation, development of stockwork veinlets, and emplacement of dikes and veins. (1)
The Main Zone of disseminated copper-molybdenum mineralization is irregular in surface outline, measuring about 700 metres north-south by 300 to 600 in an east-west direction. Primary mineralization consists of stockwork and disseminated chalcopyrite, bornite and molybdenite in a complex host rock of equigranular to porphyritic quartz monzonite, related quartz porphyry dikes, quartz veinlets, and hydrothermal breccia. The andesite and latite host rocks into which the quartz monzonite complex is intruded contains some disseminated copper mineralization, but molybdenum mineralization is generally low grade. Molybdenum is preferentially present in quartz-rich intrusions, hydrothermal breccia, and quartz veins. A centre for copper-molybdenum mineralization appears to be located in the southerly and potentially the widest part of the mineralized zone. Here, a roughly circular area is cut by eight RC holes that demonstrate disseminated copper-molybdenite primary mineralization extends to at least 300 metres depth; the bottom and lateral limits of this mineralization have not yet been defined. Mineralization present throughout the length of the holes commonly averages between 0.2 to 0.3 %Cu and 0.01 to 0.04 %Mo. The base of surface oxidation and weathering varies from 20 to 60 metres in this zone. Copper is largely removed from the oxidized cap rock. A thin chalcocite supergene enrichment zone of 5 to 30 metres thickness is present just below the base of oxidation. Copper grades in this zone of supergene enrichment vary from 0.3 to 2.0 %Cu. (1)
The Sulfate Zone of disseminated copper-molybdenum mineralization is about 500 metres north-south by about 200 metres east-west and lies just north of and adjacent to the Main Zone. Primary sulphides are chalcopyrite, bornite, pyrite and molybdenite, disseminated in a host of quartz monzonite and associated quartz porphyry, in hydrothermal breccia and in quartz-vein stockworks. Primary mineralization in the Sulfate Zone appears more restricted when compared to the Main Zone and bottoms out at depths of 120 to 200 metres. Oxidized capping is 30 to 80 metres thick and rich in the iron sulphate mineral, jarosite, which gives the zone its name. A thin, secondary supergene chalcocite enrichment zone 20 to 30 metres thick is indicated in the five holes drilled in this area. Copper grades for the zone of enrichment are generally 0.5 to 1.0 %Cu. (1)
The Cactus Zone is an area of oxide and sulphide copper-molybdenum mineralization about 300 by 1,000 metres. Based on the drill results, the oxide zone appears to average near 0.48 %Cu, while the underlying hypogene sulphide zone is near 0.44 %Cu and 0.017 %Mo. Mineralization has been constrained laterally and base of mineralization has been defined by drilling. This zone of mineralization may be a slab of mineralized bedrock that is detached from its original location of formation and moved into its present position along a low angle gravity fault of unknown displacement. (1)
The West Zone is about 1000 metres north-south and 700 meters east-west and is located about two kilometres west of the Main Zone. It has been tested with about 18 holes; 12 were drilled by Amoco, one by Occidental, one by Cominco, and four by VGM. Assay data is available for almost all of the West Zone drillholes, however, apart from the recent VGM reverse-circulation holes, no drill logs have been located. The limits and extent of mineralization are not yet well defined. Low grade disseminated chalcopyrite-chalcocite-molybdenum mineralization is hosted in phyllic-altered granodiorite, quartz porphyry, and diorite, and to a lesser extent in andesitic to dacitic host rocks. Molybdenite is present mainly in the intrusive complex, with higher grades generally related to cross-cutting quartz-molybdenite veins and stockworks. (1)
The North and South Conglomerate Zones are comprised of crudely stratified, poorly sorted, polymictic conglomerates of probable Quaternary age, which were deposited on an erosion surface developed over the Cretaceous volcanic stratigraphy. The matrix of the conglomerates contains secondary copper minerals including malachite, chrysocolla, azurite, and black copper-manganese oxides. Boulders and cobbles in the conglomerate are coated with the same assemblage of minerals. Percussion drilling conducted by Morgain on both areas suggests average grades near 0.52% Cu. Oxidized surficial rocks in the mineralized areas are heavily stained with iron oxides; goethite, jarosite, and hematite are the most common, and are produced by oxidation of pyrite. The secondary greenish yellow molybdenum oxide mineral ferrimolybdite is present but not widespread. Secondary green copper minerals and copper-manganese minerals are present in Quaternary gravels and conglomerates. (1)
The Cerro San Felipe Area where local topographic relief is on the order of 400 meters. Preliminary IP Survey results indicate that a large part of Cerro San Felipe is underlain by IP chargeability anomalies. These results are consistent with observations of extensive limonite-rich oxidized capping that indicates disseminated sulphides are widespread across Cerro San Felipe. Phelps Dodge identified a molybdenum-in-soil anomaly consisting of values of over 51 ppm in an area measuring approximately 5,600 meters by 2,200 meters. This anomaly is very large and covers most of Cerro San Felipe. The exotic or transported copper mineralization at the North and South Conglomerate Zones very likely was derived from mineralized bedrock areas in the Cuatro Hermanos intrusive complex. The shape and location of the conglomerate units indicate they were likely derived from the Cerro San Felipe Area, somewhere between the Main and West Zones. Oxidation and solution of copper in supergene acid solutions is implied and suggest a possible zone of chalcocite enrichment in the bedrock source area. (1)
The San Lorenzo Zone was added to the 4H Project in 2004, and reconnaissance stream sediment sampling and rock chip sampling in 2008 delineated several areas of anomalous Cu, Mo, and Ag for follow up investigations. (1)
Recent Geophysics
A 14-line kilometre induced polarization geophysical survey was completed over the Cuatro Hermanos mineralized system in January 2008, by contractor Zonge Geosciences. One east-west Line was run across the Main and West Zones. Three north-south lines were run across the West Zone, Main Zone, and Cerro San Felipe ridge between the West and Main Zones. Preliminary results indicate that a large part of Cerro San Felipe is underlain by IP chargeability anomalies. These results are consistent with the extensive limonite-rich oxidized capping that indicates disseminated sulphides are widespread across Cerro San Felipe and the Cuatro Hermanos sulphide system. (1)
About Prime Meridian Resources
Prime Meridian Resources is focused on the exploration and development to production of copper and silver projects in Mexico.
Contact:
Prime Meridian Resources Corp.
Brian Leeners
CEO & Director
E: brianleeners@gmail.com
T: +1 604-862-4184
SONORAN DESERT COPPER CORPORATION 
