Vaaldiam Resources Ltd.: 303 Diamonds Produced From Bulk Sample At Duas Barras.TORONTO -- Vaaldiam Resources Ltd. (TSX TSX Toronto Stock Exchange (TSE before April, 2002) TSX Transfer from Stack Pointer to Index TSX True Space Extension VENTURE:VAA VAA Virgin Atlantic Airways VAA Vaasa, Finland - Vaasa (Airport Code) VAA Voice Activated Assistant VAA Visual Arts Association VAA Viatical Association of America VAA Visual Access Angle ) reports additional results generated during its bulk sampling program on the Duas Barras Duas Barras is a municipality located in the Brazilian state of Rio de Janeiro. Its population was 10,622 (2005) and its area is 375 km².[1] References 1. ^ IBGE - [1] alluvial diamond property in Minas Gerais Minas Gerais (mē`nəs zhərīs`) [Port.,=various mines], state (1996 pop. 16,660,691), 226,707 sq mi (587,171 sq km), E Brazil. The capital is Belo Horizonte. Minas Gerais continues to produce more than half of Brazil's mineral wealth. , Brazil. Processing of 132.6 cubic metres of the target basal alluvial gravel has resulted in the recovery of 129 diamonds with a total combined weight of 30.67 carats, yielding an average recovered grade of 0.23 carats per cubic metre. Diamond grades from individual samples of the basal gravel ranged from 0.11 carats per cubic metre to 0.34 carats per cubic metre. The individual diamonds recovered in the most recent sample vary in size from 0.10 carats to 1.24 carats, with an average stone size of 0.24 carats. These latest results compare favorably to the diamond recoveries generated from the Company's initial sample of the basal gravels, which produced 27 diamonds with a total combined weight of 7.36 carats from 28.7 cubic metres of basal gravel. This initial sample yielded a recovered diamond grade of 0.26 carats per cubic metre, and individual diamonds ranging in size from 0.15 carats to 1.75 carats (Press Release of November 8, 2005). Ken Johnson Ken Johnson can refer to:
n. A crumbly mixture of clays, calcium and magnesium carbonates, and remnants of shells that is sometimes found under desert sands and used as fertilizer for lime-deficient soils. tr.v. Ltda., obtained in 2002 when they reportedly recovered 1,108.34 carats of diamonds from 4,263 cubic metres of gravel, yielding a diamond grade of 0.26 carats per cubic metre. We are now assessing the economics of including the lower-grade transitional gravels in our development plan, which if feasible, would have a significant impact on the gravel resources available on the property." The following table provides a summary of the diamond recovery results for the individual samples of the basal gravels:
---------------------------------------------------------------------
In-situ Recovered Recovered %
Gravel Sample Sample Total In-situ In-situ Recovery
Sample Volume Volume Diamonds Weight Grade Grade Based on
Descrip-(m(3))(tonnes) Recovered (Carats) (ct/- (cpht) Tracer
tion (2) m(3)) Tests
---------------------------------------------------------------------
Basal
Gravel(1) 28.7 51.7 27 7.36 0.26 14.23 92%
---------------------------------------------------------------------
Basal
Gravel 17.7 31.8 13 4.32 0.24 13.57 92%
---------------------------------------------------------------------
Basal
Gravel 11.1 19.9 14 3.04 0.28 15.28 92%
---------------------------------------------------------------------
Basal
Gravel 33.2 59.7 52 11.15 0.34 18.69 96%
---------------------------------------------------------------------
Basal
Gravel 42.0 75.6 23 4.80 0.11 6.35 92%
---------------------------------------------------------------------
Totals 132.6 238.7 129 30.67 0.23 12.85 93%
---------------------------------------------------------------------
1. Diamond results for the initial 28.7 cubic metre sample previously reported on November 8, 2005. 2. Gravels collected from pit floor by pumping. Volumes accurate to +/- 10% due to losses during pumping process. Vaaldiam's bulk sampling program has initially focused on the extraction and testing of a vertical section of alluvial gravel in the central area of the Duas Barras deposit, in an area known as Pit #1. Here the basal gravels form a three metre thick horizon that lies directly on bedrock. The bedrock consists of a fine grained quartzite quartzite, usually metamorphic rock composed of firmly cemented quartz grains. Most often it is white, light gray, yellowish, or light brown, but is sometimes colored blue, green, purple, or black by included minerals. , which in the position of Pit #1 appears to slope away from the Jequitinhonha River The Jequitinhonha River is a river that flows mainly through the Brazilian state of Minas Gerais. Its source lies near Diamantina in the Serra do Espinhaço at an elevation of 1,200 m, after which it flows northward and then east-northeastward across the uplands. , situated approximately 100 metres to the south of the sample location. The basal gravels are comprised of a clast supported gravel horizon comprised largely of well-sorted quartz cobbles cob·ble 1 n. 1. A cobblestone. 2. Geology A rock fragment between 64 and 256 millimeters in diameter, especially one that has been naturally rounded. 3. cobbles See cob coal. tr. and quartzite boulders, within a matrix of quartz-rich sands that host a visible concentration of heavy minerals such as gold, tourmaline tourmaline (t r`məlĭn, –lēn), complex borosilicate mineral with varying amounts of aluminum, iron, magnesium, sodium, lithium, potassium, and sometimes other elements, , ilmenite ilmenite (ĭl`mĕnīt), black mineral, iron titanium oxide, FeTiO3, crystallizing in the hexagonal system. It is sometimes found as tabular hexagonal crystals but occurs more commonly as small grains in igneous and metamorphic , kyanite kyaniteor cyanite or disthene Silicate mineral, one of several phases in the aluminum silicate (Al2SiO5) system. Its colour ranges from gray-green to black or blue, with blue and blue-gray being most common. , topaz, and sapphire. Both diamond and gold grades appear to correlate directly with the occurrence of these heavy minerals in the gravels. Gold-bearing concentrates have been retained for each sample, and will be shipped to an assay laboratory for analysis to determine the gold grades for the basal gravels. The presence of recoverable free gold is expected to have a significant impact on the potential economics of the Duas Barras project. The target basal gravels are overlain o·ver·lain v. Past participle of overlie. by a two to three metre thick sequence of white gravel which is also diamond-bearing. Processing of 551 cubic metres of this upper gravel horizon resulted in the recovery of 174 diamonds with a total weight of 37.20 carats, yielding an average grade of 0.07 carats per cubic metre. Diamond grades for individual samples within this sequence ranged from 0.05 carats per cubic metre to 0.11 carats per cubic metre with an average stone size of 0.21 carats. The following table provides a summary of the diamond recovery results for the samples of the gravel horizon which overlie o·ver·lie tr.v. o·ver·lay , o·ver·lain , o·ver·ly·ing, o·ver·lies 1. To lie over or on. 2. To suffocate (a baby, for example) by accidentally lying on top of it. the basal gravels:
---------------------------------------------------------------------
In-situ Recovered Recovered %
Gravel Sample Sample Total In-situ In-situ Recovery
Sample Volume Volume Diamonds Weight Grade Grade Based on
Descrip-(m(3))(tonnes) Recovered (Carats) (ct/- (cpht) Tracer
tion (2) m(3)) Tests
---------------------------------------------------------------------
Transi-
tional
Gravels 551.6 992.8 174 37.20 0.07 3.75 92%
---------------------------------------------------------------------
Processing of the remaining gravel from Pit #1 is underway and is expected to be completed by the middle of December. A second sample has been extracted from a site situated 800 metres to the west of Pit # 1. Approximately 521 cubic metres of gravel has been extracted from this site, and has been stockpiled at the Company's bulk sample plant. Processing of the alluvial gravels from this location will allow evaluation of diamond grades within the alluvial gravels comprising the western portion of the deposit. If necessary, a third sample site may be excavated 400 metres to the east of Pit #1 prior to the end of this year, to test the diamond grades within the gravels comprising the eastern section of the deposit. The Duas Barras property is one of three properties that Vaaldiam is developing in Brazil. Vaaldiam's 100%-owned Pimenta Bueno Pimenta Bueno is a municipality located in the Brazilian state of Rondônia. Its population was 31,466 (2005) and its area is 6,241 km².[1] References 1. ^ IBGE - [1] property in the state of Rondonia is currently being developed by Rio Tinto Rio Tinto may refer to:
kimberlite or blue ground Dark, heavy, often fragmented igneous rock that may contain diamonds in the rock matrix. pipes through a drilling and mini-bulk sampling program. Vaaldiam also has two drills operating on its 60%-owned Brauna property in the state of Bahia, where four kimberlite pipes are being delineated in advance of a bulk sampling program scheduled to start early next year. Vaaldiam has 65,765,002 shares issued and outstanding. This release has been reviewed by Jose Ricardo Pisani, Vice President, Exploration who is a qualified person under National Instrument 43-101. The TSX Venture Exchange TSX Venture Exchange Originally called the Canadian Venture Exchange (CDNX), this was a result of the merger of the Vancouver and Alberta stock exchanges. The goal of TSX Venture Exchange is to provide venture companies with effective access to capital while protecting investors. does not accept responsibility for the ad equacy or accuracy of this release. Vaaldiam Resources Ltd. (TSX VENTURE:VAA) |
|
||||||||||||||||

r`məlĭn, –lēn)
Printer friendly
Cite/link
Email
Feedback
Reader Opinion