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Mirasol Summarizes Virginia Silver Project Drill Results on Four Deposits from the 2010-11 Drilling and Plans 2011-12 Work

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VANCOUVER, BC, September 7, 2011. Mirasol Resources Ltd. (TSX-V: MRZ, Frankfurt: M8R) announces the final results from the 2010-2011 diamond drilling campaigns at the 100%-owned Virginia Silver Project, Santa Cruz Province, Argentina. Drilling on the Julia and Naty veins has outlined four mineral deposits with potentially economic silver grades. Results from the final fourteen re-drilled holes are presented here and include significant silver intersections with excellent core recovery, among them hole VG-6A containing 24.27 metres of 326 grams per tonne (g/t) silver with 96 percent core recovery, including 5.48 metres of 1,038 g/t silver with 98 percent recovery from the Julia North deposit. At Julia Central, VG-50A contains 28.25 metres of 220 g/t silver with 98 percent recovery including 18.11 metres of 303 g/t silver with 96% recovery. In addition, recent scout holes at Naty Extension, Ely South and Martina (Figure 1 and news release of July 18, 2011) are examples of zones that are a high priority for follow-up drilling in a planned 2011-2012 campaign.

Drilling in 2010 and 2011 systematically tested 1,780 metres of strike length of the 9,600 metres of veining outlined to date at the Virginia Silver District, in 115 holes totaling 9,266 metres. Drilling has defined four silver deposits at Julia North, Julia Central, Julia South and Naty Vein (Figure 2, Figure 3, Figure 4, and Figure 5) with potentially economic silver grades and widths, at a nominal drill spacing of 50 by 50 metres or closer.

All four silver deposits are mineralized from surface, and are highly oxidized to the lower limit of drilling, which is as much as 105 metres deep vertically (Table 1). The silver deposits are characterized by a high-grade, central zone of mineralization with intersections typically in the range of 1.5 to 5.3 metres true width containing hundreds to a few thousand of grams per tonne g/t silver. This central zone is surrounded by a broad halo of greater than 30 g/t silver (Figure 6). The true widths of the full mineralized zone at a cutoff of 30 g/t silver are frequently between 10 and 20 metres, and reach as much as 60 metres wide, with grades typically in the range of 50 to 200 g/t silver. The four mineralized bodies remain open at depth and along strike in many areas.

Table 1. Virginia Vein Zone – Summary of Mineral Deposits Outlined by Drilling 2010-11

Deposit

Drilled Strike Length (metres)

Vertical Extent Tested (metres)

True Widths at 30 g/t silver cut-off (min. to max.)
(metres)

Approx. average true width – all intercepts (metres)

Comments

Julia North

575

105

2.8 to 62.1

19

open at depth

Julia Central

580

100

1.2 to 45.4

8

open at depth

Julia South

200

55

2.7 to 9.7

5

open at depth, south and north

Naty Vein

425

100

0.6 to 60.1

16

open to northwest

Recently announced high-grade, silver intersections (news release July 18, 2011) from scout holes on previously untested segments of the Ely, Naty Extension and Martina veins (Figure 1) highlight the scope for further discovery of new silver deposits in the still sparsely-drilled Virginia Silver District.

A total of 21 holes were re-drilled in the Julia North, Julia Central and Naty Vein to improve core recovery, thereby increasing confidence in the reliability of drill intersections (news release of June 9, 2011). The final fourteen re-drilled holes are presented in Appendix A. The twin holes were drilled with their collars sited approximately one metre behind the original hole and inclined three degrees steeper, in order to intercept the same geological structures as nearly as possible. Recoveries were greatly improved in all re-drilled holes and now range from 84 to 100 percent. Mirasol believes that the quality and reliability of the drill database was substantially improved as a result of re-drilling the selected holes.

The long sections presented in Figures 2 to 5 have been prepared using assays and intercepts from re-drilled holes, excluding the original holes which were replaced by re-drilling, thus utilizing the most reliable information available. Both longitudinal sections and cross sections (Figure 6) clearly demonstrate the discovery of four deposits containing widths and grades of potential economic interest.

Salient intercepts from the re-drilled holes include holes VG-5A containing 33.38 metres of 149 g/t silver, including 19.93 metres of 201 g/t silver which includes 3.16 metres of 934 g/t silver; hole VG-6A containing 24.27 metres at 326 g/t silver including 5.48 metres at 1,038 g/t silver, and hole VG-15A containing 34.31 metres of 202 g/t silver, including 2.78 metres of 1,336 g/t silver, all estimated true width intercepts from the Julia North deposit. In addition, Julia Central hole VG-50A returned 28.25 metres of 220 g/t silver including 18.11 metres of 303 g/t silver, while hole VG-41A from the Naty Vein returned 46.82 metres containing 123 g/t silver, including 6.26 metres at 532 g/t silver (Appendix A).

Independent engineering estimates of silver resources will be required to accurately determine the quantity and grade of silver mineralization. Independent metallurgical test work is projected to commence in late 2011 to begin to determine the mineralogical characteristics of the oxidized deposits, and a process for recovering silver, a necessary step in determining economics for development of the Virginia Project. Mirasol believes the current drill density and improved recoveries of the 21 re-drilled holes will support future resource estimations. The geometry, surficial location, and deeply oxidized character of the mineralization, suggests potential for future development by bulk-mineable methods.

Mirasol’s management team is pleased with the drill results from the Virginia Silver District that has rapidly moved from a new prospecting discovery to the definition of four silver deposits with one season of drilling. As the southern hemisphere spring season approaches, Mirasol is planning a drill program to focus on testing for new mineralized silver deposits adjacent to drill intersections at the Ely, Naty Extension and Martina veins in this expanding silver district. Mirasol Resources has made available a complete data set of drill locations and intersections on its website at www.mirasolresources.com.

Paul G. Lhotka, P. Geol., Principal Geologist for Mirasol, is the Qualified Person under NI 43-101 who has approved the technical content of this news release.

For further information, contact:
Mary L. Little
President and CEO

Tel:(604) 602-9989; Fax:(604) 609-9946

Email: contact@mirasolresources.com
Website: www.mirasolresources.com

Quality Assurance/Quality Control:
Exploration at Mirasol’s Projects is supervised by Stephen C. Nano, Vice President of Exploration; Timothy Heenan, Exploration Manager; and Paul Lhotka, Principal Geologist who is the Qualified Person under NI 43-101. All technical information for the Company’s projects is obtained and reported under a formal quality assurance and quality control (QA/QC) program. Drill core, rock chip and stream sediment samples are collected under the supervision of Company geologists in accordance with standard industry practice. Samples are dispatched via commercial transport to an ISO 9001:2000-accredited laboratory in Mendoza, Argentina for analysis. Results are routinely examined by an independent geochemist to ensure laboratory performance meets required standards.

Assay results from diamond drill core or RC drill samples may be higher, lower or similar to results obtained from surface samples.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Appendix A. Virginia Vein Zone Twin Hole Results with Comparison to Original Drill Hole

Hole

From (m)

To (m)

Core Length (m)

True Width (m)1

Silver (g/t) 2,3

Silver grade x true width
(g/t * m)

Core
Recovery (%)4

VG-005A6

23.00

59.00

36.00

33.38

149

4,970

96

including

23.00

44.50

21.50

19.93

210

4,183

95

including

28.40

31.81

3.41

3.16

934

2,952

91

VG-005

20.47

42.00

21.53

19.67

262

5,152

81

including

26.90

29.85

2.95

2.69

1,436

3,870

54

VG-006A

13.00

39.00

26.00

24.27

326

7,901

96

including

18.65

24.52

5.87

5.48

1,038

5,687

98

VG-006

9.00

42.00

33.00

31.20

375

11,715

69

including

17.00

23.00

6.00

5.67

1,403

7,959

75

VG-007A6

8.45

43.00

34.55

30.22

207

6,248

95

including

8.45

30.35

21.90

19.15

299

5,735

94

including

19.50

22.70

3.20

2.80

1,703

4,766

99

VG-007

5.00

27.00

22.00

19.60

369

7,237

63

including

12.00

19.30

7.30

6.50

937

6,098

40

VG-015A

15.00

52.00

37.00

34.31

202

6,923

98

including

32.00

35.00

3.00

2.78

1,336

3,716

99

VG-015

12.00

48.00

36.00

33.83

239

8,089

61

including

31.00

36.00

5.00

4.70

1,215

5,708

41

VG-025A

52.50

76.00

23.50

19.01

240

4,560

93

including

63.50

67.47

3.97

3.21

1,080

3,467

95

VG-025A7

52.50

79.50

27.00

22.9

217

4,975

93

VG-025

55.25

78.00

22.75

18.86

249

4,689

65

including

62.00

66.70

4.70

3.90

872

3,399

56

VG-027A

67.00

88.65

21.65

16.09

193

3,111

88

including

73.40

85.40

12.00

8.92

315

2,808

81

including

78.00

82.30

4.30

3.20

524

1,675

73

VG-027

67.00

83.50

16.50

12.64

528

6,668

71

including

70.00

81.90

11.90

9.12

716

6,531

75

including

75.00

78.00

3.00

2.30

1,761

4,046

90

VG-028A

60.00

76.16

16.16

12.20

237

2,891

96

including

66.45

71.63

5.18

3.91

639

2,498

97

VG-028

56.00

85.00

29.00

22.54

291

6,549

83

including

63.10

69.60

6.50

5.05

1,152

5,821

64

VG-029A

26.00

43.60

17.60

13.48

130

1,759

97

including

35.20

39.65

4.45

3.41

362

1,233

96

VG-029

31.50

49.50

18.00

14.18

184

2,609

70

including

32.00

36.20

4.20

3.31

555

1,837

29

VG-038A

88.00

114.00

26.00

19.62

181

3,544

96

including

99.50

102.85

3.35

2.53

973

2,459

94

VG-038

94.50

112.00

17.50

13.60

382

5,195

71

including

97.05

100.50

3.45

2.68

1,649

4,420

65

VG-041A

47.50

98.00

50.50

46.82

123

5,739

100

including

71.40

78.15

6.75

6.26

532

3,327

99

VG-041

46.00

93.50

47.50

44.64

142

6,343

88

including

65.70

74.35

8.65

8.13

510

4,145

85

VG-042A

21.52

56.00

34.48

30.72

123

3,781

97

including

32.00

42.30

10.30

9.18

228

2,093

96

VG-042

16.90

51.00

34.10

30.91

178

5,495

66

including

27.50

40.30

12.80

11.60

295

3,425

51

VG-050A

37.69

71.00

33.31

28.25

220

6,216

98

including

37.69

59.05

21.36

18.11

303

5,483

96

VG-050

35.00

68.60

33.60

29.10

251

7,310

70

Including

35.00

58.40

23.40

20.26

339

6,863

60

VG-051A7

36.35

54.40

18.05

15.31

86

1,324

91

Including

38.10

44.65

6.55

5.67

156

887

84

VG-051

34.10

51.55

17.45

15.11

197

2,982

52

Including

35.00

47.00

12.00

10.39

248

2,573

49

VG-056B7

39.50

57.80

18.30

15.52

189

2,932

98

VG-056A

36.40

46.25

9.85

8.53

578

4,932

73

including

36.40

39.00

2.60

2.25

1,309

2,948

57

Notes: All analyses done by ALS Laboratory Group.

  1. True widths have been estimated using cross sections of the mineralized intercepts with the geology of the drill hole and surface information and adjacent holes and cross sections.
  2. Silver grades have not been capped and are thus “uncut”.
  3. Intercepts are calculated at a 30 g/t silver cutoff with no value given to gold or lead. “Included” intercepts are selected so as to show higher grade intervals.
  4. Core recovery is the length weighted average of the intercept quoted.
  5. Twin holes are designated by the letter “A” except for hole VG-056 where the “B” hole is the twin and the “A” the original hole (Hole VG-056 was not completed and therefore VG-056A was the original hole). Original hole results in italics.
  6. Twin hole was extended beyond the original hole and intersected additional mineralization, included in this intercept, which was not tested by the original hole.
  7. Twin hole was stopped after passing the zone of poor recovery in the original hole without crossing the full width of >30 g/t silver zone. The results here are the actual results as drilled, comparing the equivalent part of the original with the twin hole. For the purpose of the long section we have combined the end of the original hole, with good recovery, to the intercept of the twin hole to best model the full width of the mineralized zone. Hence, intercepts presented here are not equal to those in the data table for the construction of the long sections, as this table is for comparative purposes, and the long section table of intercepts for visualization purposes.

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