Virginia Vein Zone expanding....!Mirasol owns 100% of this project....
Mirasol Confirms Silver Results from the Ely, Margarita, and Naty Veins,Virginia Vein Zone, Argentina
VANCOUVER, Jun 7, 2010 (Canada NewsWire via COMTEX) -- MirasolResources Ltd. (MRZ). New zones of high grade silver mineralization at the Ely,Margarita and Naty veins which flank the silver-rich Julia vein have beenidentified at the 100% Mirasol owned Virginia Vein Zone, Santa Cruz province,Argentina (see news releases of March 4 and April 13, 2010). Preliminary resultsfrom an extensive ground magnetic and gradient array IP geophysical survey atthe Virginia Vein Zone have identified soil covered extensions of outcroppinghigh grade silver veins. Current results increase the total length ofwell-mineralized veins and potential drill targets at the zone.
This press release presents new results from channel samplingof the Ely, Margarita and Naty veins (Figure 1), including saw-cut rock chipsampling comprising 86 channel samples forming 41 composite channel samplelines. The Ely Vein averaged 331 grams per tonne ("g/t") silver over an averagewidth of 1.39 metres from 20 composite channel lines, with best results of 2.3metres at 1,430 g/t silver and 0.83 metres at 2,097 g/t silver. At the Margaritaand Naty veins, sampling of outcrop and subcrop blocks returned an average 555g/t and 298 g/t silver, from 5 and 16 composite channel lines, respectively.
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.............Table 1. Summary of New Channel Samples forthe Ely,
...........................Margarita andNaty Veins
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..................................................Cumulative
.....................Channel ......Individual ..........Length ...StrikeLength
..................Composites .........Samples .........Sampled .....ofChannels
....Vein .............(number) ........(number) .............(m) .............(m)
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....Ely ...................20 ..............59 ...........22.53 ...........1,190
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....Margarita ..............5 ...............9............5.62 ..............70
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....Naty ..................16 ..............18 ............8.50 .............100
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....Totals ................41 ..............86 ...........36.65 ...........1,360
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In detail, the Ely vein (Figure 2, central panel) comprises anorth-northeast trending vein structure that in some sections becomes twoparallel veins. Channel samples were collected at 20 locations along strikewhere outcrop permitted. The length weighted average ("LWA") grade for allchannel composites is 1.39 metres at 331 g/t silver (Table 2), taken over astrike length of 1,190 metres of the vein's 2000 metre exposed trend. The wallrock to the vein is generally not visible, such that stated widths reflectminimum true widths.
Silver grades at Ely are variable, but sampling indicates thathighest grades occur in two distinct segments of the vein. The northern segmentcrops out discontinuously over a strike length of 130 metres where channelcomposites grade up to 2,097 g/t silver over 0.83 metres width. Supporting highgrades are found in rock chip samples to the south of this channel, and in afloat block north of it that contains 2,350 g/t silver (Figure 3, left panel).
Mirasol recently completed in-house Gradient Array IP (inducedpolarization) geophysical surveys which produced a strong chargeability anomalyof up to 10 milliseconds, coincident with the vein. North of the channelsampling and float block, the vein structure passes under soil, however IPindicates a similar anomaly located less than 100 metres north of the floatblock. Systematic mechanical trenching or drilling is required to test thistarget.
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...........Table 2. ElyVein Channel Composites - Compiled Results
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...................................Gaps as
..............Sampled ..Unsampled ......% of ...Total
....Channel ....Length .......Gaps .....Total ..Length .......Silver ........Lead
.....ID .........(m)(1) .....(m)(2)...Length ...(m)(3) ...(g/t)(4)(5) ...(%)(4)(6)
....-------------------------------------------------------------------------
....EL-40328 .....0.81.......0.02 ........2%....0.83 ........2,097........0.27
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....EL-40292a ....1.33.......0.00 ..............1.33 ...........47........0.17
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....EL-40292b(7) 0.56 .......0.00 .......27% ....0.56 ...........20 ........0.08
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....EL-40237 .....2.22.......0.00 ..............2.22 ..........318........0.25
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....EL-40146(7) ..1.70.......2.17 .......56%....3.87 ..........184........0.10
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....EL-39904 .....0.80.......0.00 ..............0.80 ..........129........0.46
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....EL-39860 .....1.57.......0.16 ........9%....1.73 ..........133........0.47
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....EL-39620 .....0.74.......0.05 ........6%....0.79 ...........89........0.04
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....EL-39553(7) ..1.14.......0.34 .......23%....1.48 ...........12........0.37
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....EL-39523a ....0.28.......0.00 ..............0.28 ...........83........0.03
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....EL-39523b(7) 2.50 .......0.91 .......27% ....3.41 ...........27 ........0.27
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....EL-39496a(7) 0.58 .......0.49 .......46% ....1.07 ..........146 ........0.07
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....EL-39496b(7) 2.25 .......0.57 .......20% ....2.82 ...........11 ........0.40
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....EL-39482a ....2.21.......0.10 ........4%....2.31 ........1,430........1.21
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....EL-39482b(7) 1.10 .......0.41 .......27% ....1.51 ...........10 ........0.49
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....EL-39449 .....1.20.......0.00 ..............1.20 ..........596........0.36
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....EL-39190 .....0.40.......0.00 ..............0.40 ..........114........0.37
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....EL-39184a ....0.35.......0.08 .......19%....0.43 ..........136........0.08
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....EL-39184b ....0.34.......0.00 ..............0.34 ..........258........1.32
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....EL-39184c ....0.45.......0.00 ..............0.45 ...........26........0.24
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....Length Weighted Average Channels equal ....1.39 ..........331 ........0.39
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....Notes: All analyses done by ALS ChemexLaboratory.
....1. ..Sampled length is the actual true width that was sampled.
....2. ..Unsampledgaps are the cumulative length of any gaps in outcrop which
........were unable to be sampled. See Technical Appendixof March 4, 2010
........press release fordetails.
....3. ..Total length is the sum of the actual sampled outcropplus any gaps
........which could not be sampled.
....4. ..The lengthweighted silver, gold and lead averages are based on the
........sampled width not the total length and all valuesare uncut (i.e. no
........grade capping has beenapplied).
....5. ..Silver results are by Ag-GRA21, a fire-assay collectionmethod with
........gravimetric finish.
....6. ..Lead results to 10,000ppm (1%) are by ME-ICP41 with over values
........greater than 1% by Pb-OG46.
....7. ..Channels so marked havesampling gaps greater than 20% of their total
........length. See Technical Appendix of March 4, 2010press release.
....8. ..Gold assayed by Au-AA24, a fire-assay collection methodwith atomic
........absorption spectroscopyfinish. Gold values for the channel
........composites range from less than 0.05 g/t to amaximum of 0.07 g/t
........and hence are nottabulated.
....
In the southern part of the Ely Vein, a 50 metre long segmentreturned channel samples reaching 1,430 g/t silver over 2.31 metres minimum truewidth (Figure 3 right panel). Two parallel vein branches show increased silvervalues towards the south end of the exposed structure. Gradient IP resultsindicate the vein corresponds to a chargeability anomaly of up to 12milliseconds, which increases in strength to the south into an area that islargely soil-covered. Prospecting of the extension of the vein structure overthe IP anomaly encountered mineralized float blocks of vein material and assaysare pending. The strongest chargeability anomaly corresponds to 250 metres ofmostly covered strike length located between the channel samples discussedabove, and sparse float blocks (between channels EL-39449 with 1.2 metres of 596g/t Ag, and EL-39190), and is considered highly prospective.
The Margarita Vein (Figure 2, right panel) averaged 555 g/tsilver over 1.38 metres based on 5 composite channel lines (channel compositeMA-38639 was previously released). Grades at Margarita are quite variablereflecting several texturally distinct vein phases including crustiform bandedand breccia vein types, both containing moderate to high silver grades, and atectonic breccia containing lower grades (channel composite MA-38663\ Ag). Inmany respects, the Margarita Vein visually resembles the Julia Vein (newsreleases of March 4 and Apr. 13, 2010) over its 200 metre exposure.
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.........Table 3. Margarita Vein Channel Samples - CompiledResults
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...................................Gaps as
..............Sampled ..Unsampled ......% of ...Total
....Channel ....Length .......Gaps .....Total ..Length .......Silver ........Lead
.....ID .........(m)(1) .....(m)(2)...Length ...(m)(3) ...(g/t)(4)(5) ...(%)(4)(6)
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....MA-38680(7) ..0.82.......0.52 .......39%....1.34 ..........249........0.41
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....MA-38674 .....0.79.......0.00 ..............0.79 ..........136........0.39
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....MA-38663(7) ..1.90.......0.67 .......26%....2.57 ...........13........0.04
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....MA-38639* ...1.50.......0.00 ..............1.50 ........1,479........0.62
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....MA-38623 .....0.61.......0.08 .......12%....0.69 ..........926........0.13
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....Length Weighted Average Channels equal ....1.38 ..........555 ........1.27
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....Notes as per Table 2.
....* Previously released
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The Naty Vein (Figure 2 left panel) is poorly exposed andchannel sampling of outcrop was not possible. Instead, individual blocks oflocally-derived, subcrop were channel sampled to determine the typical grades ofthe vein, but no assumptions were made concerning the vein's width. The blockssampled represent a 100 metre sector of the vein's known 560 metre strike lengthas defined by mapping and rock chip sampling. Channel sampled blocks returnedgrades from 91 to 557 g/t silver and averaged 298 g/t silver. Float and subcropexposed both north and south of the channel sampled vein sector indicatepotential for high silver grades in covered extensions of the Naty Vein. Alarge, isolated, transported block of vein material assaying 3,250 g/t silverwas located 210 metres northwest of the last exposures of the Naty Vein, wheresubcrop and blocks returned chip samples grading 717 and 796 g/t silver.
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...........Table 4. Naty Vein Channel Samples - Subcrop andBlocks
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.....................................Sampled
......................................Length..........Silver ............Lead
....ChannelID .........................(m)(1) ......(g/t)(4)(5) ......(%)(4)(6)
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....NA-39874 ............................0.31 .............104 ............0.23
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....NA-39866 (2 samples) ................0.34 .............339 ............0.35
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....NA-39865 ............................0.50 .............401 ............0.41
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....NA-39859 ............................0.36 .............304 ............0.50
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....NA-39854 ............................0.42 .............281 ............0.34
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....NA-39851 ............................0.53 .............371 ............0.19
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....NA-39846 ............................0.18 .............290 ............1.58
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....NA-39830 ............................0.77 .............260 ............1.52
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....NA-39821 ............................0.85 .............258 ............0.75
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....NA-39820 ............................0.86 .............386 ............1.06
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....NA-39808 ............................0.50 .............320 ............1.60
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....NA-39805 ............................0.50 ..............91 ............0.39
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....NA-39788a (2 samples) ...............0.37 .............557 ............0.74
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....NA-39788b ...........................0.64 .............388 ............0.55
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....NA-39788c ...........................0.59 .............116 ............0.58
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....NA-39788d ...........................0.78 .............298 ............0.82
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....Length Weighted Average ..............................298 ............0.75
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....Notes are per Table 2.
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Ongoing mapping and sampling at the Virginia Vein Zonecontinues to reveal new veining in outcrop and subcrop, with assays pending from120 samples from additional newly discovered veins. Extensive high densityground magnetic and gradient array geophysical surveys are in progress.Preliminary results of the gradient array survey show a significant degree ofcorrelation between outcropping veins and chargeable anomalies, and clearlyindicate extensions of high grade silver structures under shallow soil cover.
"Exploration at the Virginia Vein Zone has confirmed highgrade nature and extensions of silver-rich structures surrounding the JuliaVein, and we believe the results significantly expand the exploration potential.The application of systematic sampling combined with high quality geophysicaldata has increased the number of prospective drill targets at the Virginia VeinZone. The property continues to present new opportunities and we look forward toreceiving additional exploration results," stated Mary Little, Mirasol'sPresident and CEO.