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Orex Minerals Inc.: Third Drilling Rig Added to the Coneto Gold-Silver Project in Durango, Mexico

VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 25, 2013) - Orex Minerals Inc. (TSX VENTURE:REX) ("Orex") is pleased to announce that a third diamond drilling rig has been added to the Coneto Gold-Silver Project in Durango, Mexico. A technical committee, with representation of Orex and its project partner Fresnillo PLC (FRES.L) ("Fresnillo"), is managing this Phase-II program. In addition, the results of the third batch of assays from the 12,000 metres Phase-II diamond drilling program are now available.

Reconnaissance drilling to date on the Coneto Project has yielded intercepts in six mineralized structures, including Loma Verde, Impulsora, La Bufa, Santo Niño, Sauces and Descubridora, identifying them as targets for delineation drilling.

Hole BCO-17 in the Descubridora vein yielded an intercept of core length of 6.45 metres (true width 4.84 metres) grading gold 0.71 g/t and silver 153 g/t, for a gold-equivalent of 3.49 g/t, or silver-equivalent of 192 g/t.

Hole BCO-28 in the Impulsora vein yielded an intercept of core length of 7.60 metres (true width 4.56 metres) grading gold 2.04 g/t and silver 12.3 g/t, for a gold-equivalent of 2.27 g/t, or silver-equivalent of 125 g/t.

According to Orex's President, Gary Cope, "We are very encouraged by the number of structures being identified in the reconnaissance drilling for additional follow-up. Coneto is indeed a very large mining district, with multiple targets."

Table 1. - Key Vein Intercepts

Vein

From
(m)

To
(m)

Core
Length

True
Width

Au
(g/t)

Ag
(g/t)

Au-Eq
(g/t)

Ag-Eq
(g/t)

VGUA-15

Guadalupana

160.70

169.15

8.45

5.97

0.13

24

0.57

31

Includes

163.45

164.45

1.00

0.71

0.72

119

2.88

157

Unnamed

207.90

211.00

3.10

2.17

0.28

9

0.44

24

Includes

207.90

208.30

0.40

0.30

0.20

61

1.31

72

Includes

210.70

211.00

0.30

0.22

1.27

3

1.32

73

VSAU-16

Descubridora

153.75

170.05

16.30

11.52

0.24

27

0.73

40

Includes

161.15

164.35

3.20

2.26

0.32

74

1.67

92

Includes

161.15

162.45

1.30

0.92

0.40

118

2.55

140

VSAU-17

Descubridora

156.90

163.35

6.45

4.84

0.71

153

3.49

192

Includes

158.45

159.65

1.20

0.90

1.53

631

13.00

715

Includes

158.45

159.15

0.70

0.52

1.81

936

18.83

1,036

VSAU-18A

Sauces

164.85

172.80

7.95

5.68

0.32

64

1.48

82

Includes

164.85

168.70

3.85

2.75

0.44

99

2.26

124

Includes

164.85

165.45

0.60

0.43

0.57

323

6.44

354

BCO-21

Impulsora

283.90

292.95

9.05

6.79

1.52

10

1.71

94

Includes

286.85

292.95

6.10

4.58

2.03

12

2.25

124

Includes

289.50

292.10

2.60

1.95

2.81

15

3.09

170

BCO-23

Impulsora

76.05

87.60

11.55

8.66

0.76

5

0.85

47

Includes

83.15

87.60

4.45

3.34

0.90

6

1.00

55

Includes

86.50

87.60

1.10

0.83

1.09

7

1.22

67

La Isla

256.40

257.65

1.25

0.88

3.70

6

3.81

210

BCO-26

Promontorio

85.20

93.00

7.80

5.85

0.43

11

0.64

35

Includes

91.25

93.00

1.75

1.31

1.27

38

1.96

108

Includes

91.90

92.50

0.60

0.45

1.72

69

2.96

163

Unnamed

268.15

268.75

0.60

0.45

2.15

34

2.77

152

Unnamed

281.05

283.85

2.80

2.10

0.80

34

1.41

77

Includes

282.75

283.85

1.10

0.83

1.20

55

2.20

121

Impulsora

337.70

362.10

24.40

18.30

0.54

5

0.63

35

Includes

351.15

362.10

10.95

8.21

0.81

3

0.86

47

Includes

354.45

356.25

1.80

1.35

1.90

5

1.98

109

BCO-28

Unnamed

120.90

129.20

8.30

4.98

0.42

10

0.61

33

Includes

122.90

126.20

3.30

1.98

0.55

11

0.75

42

Includes

122.90

123.90

1.00

0.60

1.00

18

1.33

73

Impulsora

137.00

144.60

7.60

4.56

2.04

12

2.27

125

Includes

139.35

144.60

5.25

3.15

2.86

13

3.09

170

Includes

139.35

141.80

2.45

1.47

5.07

18

5.39

296

BCO-29

Unnamed

67.70

68.60

0.90

0.64

0.14

73

1.48

81

Unnamed

80.10

92.80

12.70

8.98

0.58

6

0.68

37

Includes

86.10

92.80

6.70

4.74

0.68

5

0.77

42

Includes

86.10

86.85

0.75

0.53

2.48

15

2.75

151

Unnamed

128.10

134.60

6.50

4.60

0.17

25

0.63

34

Includes

128.10

130.95

2.85

2.01

0.18

54

1.16

64

Includes

130.65

130.95

0.30

0.21

0.50

278

5.55

306

Silver-equivalent for the purposes of this news release is defined as silver grade plus 55 times gold grade. Gold-equivalent is defined as gold grade, plus silver divided by 55. The 55:1 ratio is based on the spot prices of silver $28.90/ounce and gold $1596/ounce. Metallurgical recoveries and net smelter returns are assumed to be 100% for the equivalent values. Base metal values are not included in the equivalent values.

Coneto Mining District - Durango, Mexico

The historic Coneto Mining District is situated in the heart of the "Mexican Silver Trend", stretching from Guanajuato in the southeast, through to the states of Zacatecas and Durango. The trend hosts some of the world's largest silver deposits, including Fresnillo, Guanajuato, La Pitarrilla, Real de Angeles, and Zacatecas mining camps.

Orex and Fresnillo hold extensive contiguous mineral concessions in the Coneto Mining District, which collectively total approximately 17,600 hectares and cover an extensive area of known mineralized epithermal quartz veins. The project is located in the Mesa Central, on the eastern flank of the Sierra Madre Occidental Mountains.

Ben Whiting, P.Geo., is a Qualified Person as defined in NI 43-101 and takes responsibility for the technical disclosure contained within this news release. The drill core sampling has been conducted with a rigorous QA/QC program, incorporating analytical standards and blanks into the sample stream. Analyses were performed in the laboratories of ALS Chemex.

The first twelve holes of the current drilling program of Coneto, were reported in news releases on November 7, 2012 and January 7, 2013, following the successful Phase-I drilling program (see news releases: July 6, 2010 and August 9, 2010). A drill hole location map will be available on the Orex Minerals Inc. website at www.orexminerals.com.

ABOUT OREX MINERALS INC.

Orex Minerals Inc. (TSX VENTURE:REX) is a Canadian-based junior exploration company comprised of highly qualified mining professionals. The Company has several current projects: its flagship property, the Barsele Gold Project in Sweden, the Los Crestones Gold-Silver Project in Sinaloa, Mexico, and the Coneto Gold-Silver Project in Durango, Mexico, which is currently under option to Fresnillo PLC.

ON BEHALF OF THE BOARD OF DIRECTORS

Gary Cope, President

This News Release may contain forward-looking statements including but not limited to comments regarding the timing and content of upcoming work programs, geological interpretations, receipt of property titles, potential mineral recovery processes, etc. Forward-looking statements address future events and conditions and therefore involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements and Orex undertakes no obligation to update such statements, except as required by law.