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Avrupa Minerals, through its wholly-owned subsidiary, MAEPA Lda., holds 6 exploration licenses in Portugal, spread from the north to the south in the country. Total area under control by Avrupa is approximately 3,821 square kilometers.
The Covas license, located about 100 kilometers north of Porto, Portugal's second largest city, covers known and previously mined tungsten mineralization. The Covas project is now included in a JV with, and funded by, Blackheath Resources Inc. Three phases of drilling have been completed on the project, culminating in the Q1 2015 announcement by Blackheath that they had completed an independent, NI 43-101 – compliant resource estimate for the Covas Tungsten Project, which consists of seven separate deposits in close proximity.Covas is now estimated to contain:
- 449,800 MTUs WO3 indicated mineral resource based on 1,081,000 tonnes at an average grade of 0.42% WO3
- 767,100 MTUs WO3 inferred mineral resource based on 2,211,000 tonnes at an average grade of 0.35% WO3
Blackheath commented further, concerning the resource:
- Substantial increase in MTUs over previous historical estimates
- Shallow depth -- Over 80% of the resource is located within 60 meters of surface
- Mineralization remains open in multiple directions, including high-grade potential areas that will be tested during the next drill campaign focusing on resource growth and grade increase
- Higher grade resource using a 0.25% WO3 cut-off
- 375,200 MTUs WO3 indicated based on 686,000 tonnes at an average grade of 0.55% WO3, and
- 584,900 MTUs WO3 inferred based on 1,281,000 tonnes at an average grade of 0.46% WO3.
Avrupa holds four licenses (Alvalade, Marateca, Mertola, and Santa Margarida do Sado) in the Portuguese portion of the Iberian Pyrite Belt (IPB). The IPB is historically one of the world's largest and most prolific copper-zinc-iron massive sulfide belts. Three of the Company's IPB licenses are located to the northwest of, and along trend from the giant Neves Corvo copper-zinc-tin massive sulfide deposit, presently being mined by Lundin Mining. The fourth license is located east of Neves Corvo, along a parallel mineral belt that hosts the past-producing São Domingos Mine. Avrupa completed a four-hole scout drilling project in 2010-11 on the Marateca license. Two of the holes intercepted silver-rich stockwork mineralization at the Serrinha location. Two massive sulfide targets at São Martinho and Volta were not reached due to difficult drilling conditions. There are at least eight more target areas are present in the Marateca license area.
The Company acquired the Santa Margarida do Sado and Mertola licenses in 2014. Santa Margarida covers potential northward extensions of mineralization from the historic Canal Caveira Mine, located on the Alvalade JV license, immediately adjacent to the south. All four VMS target belts in Portugal -- Neves Corvo, Aljustrel, São Domingos, and Santa Margarida de Serra -- pass through the Santa Margarida license, suggesting strong exploration potential over a large area. Already, based on historic exploration, the Company has recognized several general drill target areas within the license.
The second license, Mertola, is located east of Neves Corvo, and covers the eastern portion, in Portugal, of the São Domingos VMS target belt. The past-producing São Domingos Mine is located close to the east end of the license, and is central to an area of good copper- and zinc-bearing massive sulfide targets. There are numerous known prospects on the license, and core from over 35 holes of historic drilling is available for re-logging and re-sampling.
The Alvalade license (formerly three separate licenses, Alvalade, Canal Caveira, and Ferreira do Alentejo amalgamated into a single license) is the basis of a joint venture project with Antofagasta Minerals. Avrupa presently operates the JV, and has just completed a fifth phase of exploratory drilling. In total, during the period 2012 to 2014, Avrupa drilled 43 holes for a total of over 17,000 meters. In February 2014, the Company announced a significant massive sulfide drill intercept in the Sesmarias target area, located approximately seven kilometers south of the historic Lousal Mine, under 100 meters of weakly consolidated sedimentary cover. Follow-up drilling in the Sesmarias West target area has identified a 1,800-meter strike length of potentially mineralized black shale rock units. In addition, holes in the Monte da Bela Vista, Furadouro, Santa Margarida da Serra, and Faleiros target areas intercepted visible copper mineralization and require further follow-up drilling. Five of these holes contained intervals of greater than 0.3% copper over intervals from 1 to 22 meters in width. The drill targeting was designed to both explore for massive sulfide deposits and to assist in revising and updating the model for geological and structural control of potential mineralization. Avrupa and AMSA geologists and consultants have successfully devised a new working model for drill targeting in the northern regions of the Pyrite Belt, thus opening up large new areas for possible massive sulfide mineralization within the JV area. Recent, improved understanding of the tectono-structural model of the Sesmarias mineralization led the Company to attempt a single, deep drill hole in the Sesmarias East conceptual target zone in Q4 2014. Results indicated potential for massive sulfide mineralization in a basin setting similar to that of Sesmarias. Earlier in 2014, several holes drilled into the Pombal basin area, located about 15 kilometers south of Sesmarias, encountered weak base metal mineralization and potential VMS-style alteration in the same part of the stratigraphic section as at Sesmarias. Further exploration into the Pombal basin target area is warranted.