The Midnight Target

System Type:

Epithermal, high-grade, banded, quartz veining, with widespread breccia, and stockwork zones representing an open-pit target

Strike-Length:

Midnight has an exposed strike length of 650 metres and a width of over 150 metres before being obscured by post mineral gravels in all directions. 

Resource: 

None at this time

Location:

The Midnight target is situated on the Nevada side of the Gold Springs project 2,700 metres west of the South Jumbo resource, and directly west of the Lost World target.

Drilling:

Two holes were drilled at the Midnight target in 2010. These holes targeted the high-grade vein system in the proximity of the historic workings. Both holes were lost prior to target depths as one entered a stope from the historic workings and the other was lost due to poor drilling conditions. Neither hole intersected signficant gold values.

Geophysics:

There is a strong north-south oriented resistivity high anomaly centered on the Midnight target as identified in the airborne ZTEM geophysical survey (see map below).  The anomaly extends past the exposed mineralization and to the north it adjoins a strong northeast trending ZTEM resistivity anomaly along which the Camp Bell target and the Thor resource are located. 

Geology:

Mineralization consists of multiple parallel zones hosting sheeted, calcite-quartz veins, breccia and stockwork development within strong silicification. Areas of exposure display veins up to 2 metres wide with brecciation and stockwork development over widths of up to 150 metres. These parallel zones of veining can be traced for 650 metres along strike expanding over a width of 150 metres before being obscured by post mineral gravels in all directions. Several historical workings are centered on the vein sets and represent some of the deepest workings found on the project, though no historic information is available. GRC sampling of the high-grade vein sets have produced values up to 57.32 g/t gold with 59.4 g/t silver.

Structural Geology:

The Midnight target is bound by two major north-south trending right-lateral faults in a similar structural setting as the South Jumbo resource. These bounding faults are the Horseshoe, on the west, and the Gold Springs, on the east.  Lateral movement along these structures created stepover faulting seen cutting through the area of exposed mineralization. In addition, there are shallow east-dipping veins and fractures that could create mineralized, horizontal pipe-like zones where they intersect the vein sets. This is a similar configuration to the higher-grade features seen at the South Jumbo resource.

Historical Mining:

The Midnight target has several shafts, tunnels and pits located on the dominant veins and stockwork zones. The Midnight historical shaft is estimated to be over 200 metres in depth and exploited one of these high-grade vein systems.

Geochemistry:

Historical mining in the area was focused on quartz-calcite veins up to 2 metres wide that grade up to 57.32 g/t gold with 59.4 g/t silver. Wide areas of brecciation and stockwork vein development are seen in zones of intense silicification. These often produce surface sample results in excess of 0.5 g/t Au and up to 1.42 g/t Au. GRC recently completed a detailed mapping program at Midnight with an associated surface sampling program. Results from this work greater than 0.25 g/t Au (cutoff grade of the existing resources at Gold Springs) are listed below followed by past sampling efforts of the Company.

Table: Recent Rock Chip Sampling Results from Midnight:

Sample ID

Sample Type

Description

Au (g/t)

Ag (g/t)

87268

Discontinuous chip, 1m

Banded quartz-calcite vein in altered andesite

0.56

5.1

87270

Float

Banded/bladed calcite-quartz vein boulder

0.43

2.9

87272

Discontinuous chip, 0.5m

Banded/bladed quartz-calcite vein in altered host andesite.

1.31

12.3

87273

Grab, 20 cm

Silicification and stockwork veining

0.56

4.6

87274

Grab, 15cm

Stockwork quartz veining in strongly altered andesite.

1.42

10.1

87277

Discontinuous chip, 2m

Quartz-sericite altered andesite

0.42

3.9

87283

Discontinuous chip, 1m

Banded and bladed quartz-calcite vein

0.81

7.7

87285

Grab, 10cm

Banded and bladed quartz-calcite vein in altered andesite

2.21

3.3

87286

Dump

Calcite-quartz vein, fault hosted with clay altered margins containing andesite clast

3.94

6.7

87287

Discontinuous chip, 0.5m

Stockwork quartz veining in pervasively silicified andesite

0.36

3.2

225206

Dump

Banded calcite-quartz vein and stockwork veining

0.37

<0.5

225208

Dump

Quartz-calcite vein

0.69

2.9

A cutoff grade of 0.25 g/t Au was used for the samples, which is the cutoff grade for the existing resources at Gold Springs

Table: Previous Rock Chip Sampling Results from Midnight:

 SAMPLE

Sample Type

Description

Au (g/t)

Ag (g/t)

33853

dump

Vuggy, bladed quartz vein

57.32

59.4

33893

outcrop

Quartz vein

0.60

3

33896

float

Quartz veinlets

0.91

2.8

33897

dump

Quartz after calcite vein

0.69

6.1

33898

float

Quartz after calcite vein

0.35

1.2

33899

dump

Gossan with silicification

5.75

25.4

102527

dump

Veins from Midnight dump

1.72

3.5

102530

outcrop

Bladed quartz-calcite vein

0.93

4.3

102531

outcrop

Quartz-calcite vein zone

0.29

3.7

102532

outcrop

Banded quartz vein

0.59

7.1

102533

outcrop

2 metre banded quartz vein

0.75

16

102587

outcrop

2 metre banded quartz vein

0.30

12.1

102589

outcrop

3 metre quartz vein

0.25

8.4

102591

outcrop

2 metre quartz-calcite vein

0.27

6.2

113299

 Trench Channel

2 metre stockwork veining

0.74

2.7

113311

 Trench Channel

2 metre stockwork veining

0.46

10.3

113312

 Trench Channel

2 metre stockwork veining

0.77

9.7

113313

 Trench Channel

2 metre stockwork veining

0.52

5.7

113315

 Trench Channel

2 metre stockwork veining

0.56

6.2

87381

 Trench Channel

2 metre stockwork veining

0.40

1.9

87382

 Trench Channel

2 metre stockwork veining

1.20

6.3

87396

 Trench Channel

2 metre stockwork veining

1.06

16.5

87397

 Trench Channel

2 metre stockwork veining

0.47

7.2

54298

outcrop

Quartz-calcite vein and stockwork zone

1.83

8.3

54299

outcrop chip 2’

Clay altered andesite

0.43

2.4

54300

outcrop chip 2’

Stockwork veining

0.48

0.9

52913

outcrop chip 10’

Stockwork veining

0.70

1

52927

outcrop chip 6’

Stockwork veining

0.49

2.1

52928

outcrop chip 3’

Stockwork veining

0.38

3.3

52929

outcrop chip 18”

Quartz-calcite vein

0.27

1

52930

outcrop chip 4’

Quartz-calcite vein

0.73

5.7

102627

 Trench Channel

Quartz-calcite vein

0.81

2

102630

 Trench Channel

Quartz vein and brecciated andesite

1.15

5.9

102631

 Trench Channel

Quartz-calcite vein

0.99

3.9

102632

 Trench Channel

Quartz vein and brecciated andesite

0.74

1.9

102633

 Trench Channel

Quartz vein

1.05

8.3

40701

 Trench Channel

2 metre andesite breccia and stockwork veins

0.25

0.9

40708

 Trench Channel

2 metre massive quartz vein

1.16

4.9

40709

 Trench Channel

2 metre massive vein and brecciated andesite

0.39

3.7

40710

 Trench Channel

2 metre fractured andesite

0.32

1.1

40711

 Trench Channel

2 metre silicified brecciated with quartz vein

0.52

4.8

40712

 Trench Channel

2 metre massive quartz vein

0.42

2.4

40713

 Trench Channel

2 metre massive quartz vein

0.66

6.7

A cutoff grade of 0.25 g/t Au was used for the samples, which is the cutoff grade for the existing resources at Gold Springs

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