Columbia River Resources Inc. - Ayaco Option Exercised.VANCOUVER, B.C.--(BUSINESS WIRE)--Dec. 13, 1999-- Columbia River Resources Inc. (OTCBB OTCBB See OTC Bulletin Board (OTCBB). : CRVV CRVV Centrum Ronde Van Vlaanderen (Dutch; Belgium) ) is pleased to announce that as of today the Ayaco (Ghana) Ltd., Tanoso Reconnaissance option has been exercised. By issuing 500,000 shares upon signing and by issuing an additional 500,000 shares in one year, Columbia River Resources Inc. will earn a 100% interest in the property subject to a 10% carried interest to the Republic of Ghana and an additional 10% net profits interest to Ayaco Ghana Ltd. Regional studies within the Tanoso Licence have defined a plus 100ppb gold-in-soil anomaly 2.8 km long and up to 300 metres wide. Additional infill geochemistry along 100m spaced lines with soil sampling at 25m has confirmed and enhanced further these results. The depth continuity of the anomaly was verified through the excavation of ten 2 metre square pits into saprolite, which vary from 1.2 to 4.3 metres deep. These pits verify a very deep weathering profile and that the gold is associated with quartz veining with pit wall samples returning up to 8.0 g/t. Trenching is underway to further establish the controls on mineralization Mineralization The process by which the body uses minerals to build bone structure. Mentioned in: Rickets mineralization, n the bioprecipitation of an inorganic substance. . A ground magnetic survey was completed over the detailed grid and a very close spatial relationship is observed between magnetic boundaries and the limits of the soil anomaly. These boundaries appear to be structurally controlled and parallel the Yamfo trend which controls mineralization immediately southwest of Ayaco. Cross-structures are also interpreted from the magnetic survey and these compliment a detailed lineament lin·e·a·ment n. 1. A distinctive shape, contour, or line, especially of the face. 2. A definitive or characteristic feature. analysis of air photos. The Company is planning a reverse circulation drilling programme on this target in early 2000. In addition to the first priority target, detailed structural interpretation demonstrates the persistence of faulting into granite gneisses a further 15km northeast into the property. This is tentatively interpreted as feathering The appearance of jagged edges on moving objects in an interlaced display. Also known as "combing," this artifact is created because the image moves from one video field (odd lines displayed) to the next video field (even lines filled in while odd lines still present). of the major Yamfo structure and is coincident with highly anomalous BLEG (Bulk Leach Extractable Gold) stream geochemistry up to 120ppb gold. Nigerian Review Crews have returned from the field in Nigeria where a number of areas containing pegmatite pegmatite: see granite. pegmatite Almost any wholly crystalline igneous rock that is at least in part very coarse-grained, the major constituents of which include minerals typically found in ordinary igneous rocks (such as granites) and in which bodies and swarms have been visited during regional reconnaissance studies. This includes 25 mining sites and over 35 pegmatite occurrences. In these areas, there are a number of sites, which show considerable promise for significant occurrences of tantalum and related rare earth mineralization. Thick (up to 50 metres) pegmatite bodies, some up to 300 metres in length, have been discovered in central Nigeria at Angwan Mallan. The presence of another mined pegmatite body to the northwest of Angwan Mallan allows the strike length of the pegmatite swarm to be extended for a distance of up to 5 kilometres. Sites in the Tattara area also show considerable promise. Currently, aritisanal mining activities at Tattara, yield 50 kilograms of tantalite/week. In the Kassada area, in addition to previously known pegmatite bodies, several new pegmatite bodies have been visited. Some are strongly mineralized min·er·al·ize v. min·er·al·ized, min·er·al·iz·ing, min·er·al·iz·es v.tr. 1. To convert to a mineral substance; petrify. 2. To transform a metal into a mineral by oxidation. 3. in tantalite tan·ta·lite n. A black to red-brown mineral, (Fe,Mn)(Ta,Nb)2O6, distinguished from columbite by the predominance of tantalum over niobium and used as an ore of both elements. , yielding results of >400 ppm Ta2O5, >2000 ppm Sn and 0.4 to 0.5 wt% rubidium rubidium (r  bĭd`ēəm), metallic chemical element; symbol Rb; at. no. 37; at. wt. 85.4678; m.p. 38.89°C;; b.p. 686°C;; sp. gr. 1.53 at 20°C;; valence +1. . Other promising sites include those located in the areas of Nassarrawa, Garaku, Wamba and Nikke. At many of the sites in these areas, both thin and thick pegmatite bodies, with abundant tantalite, occur in close spatial association with each other. Of particular interest is the Kontagora site in Wamba where the pegmatite swarm is up to several hundreds of metres in length. At all sites, the pegmatites are predominantly albitic al·bite n. A widely distributed white feldspar, NaAlSi3O8, that is one of the common rock-forming plagioclase group. [Latin albus, white; see albho- , with abundant fine- and coarse-grained tantalite. Minerals occurring in association with the tantalite include; spodumene, beryl, tourmaline, lepidolite le·pid·o·lite n. A lilac or pink to gray mineral of the mica group, K(Li,Al)3(Si,Al)4O10(F,OH)2, used as lithium ore and in ceramic production. and muscovite. Potential exists for rare metal mineralization (lithium, rubidium and cesium) at many of the pegmatite occurrences visited. All sites represent very attractive targets for future detailed exploration, and have the potential to become sites of world class deposits of tantalum and other rare metals. Further assay results are pending. For further information on the Yamfo Gold Trend please visit www.moydow.com or www.normandy.com ON BEHALF OF COLUMBIA RIVER RESOURCES INC. Robert Ferguson, President |
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