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Exploration

Magna fielded a team of geologists to San Judas December 2019, making significant progress based on mapping and sampling both on surface and in old underground works. Drone technology was used to capture high definition images from key areas, alterations, and structural features to aid in data interpretation. To date, the presence of gold mineralization has been identified and confirmed at these targets.

Santa Lucia and La Paloma are parallel gold bearing structures approximately 500 meters apart with strong hematitic alteration between the structures.  Santa Lucia is a bulk mining target consisting of a series of shallow historical mines (trenches and shafts) distributed along a line of over 900 m in length, with a 135-degree azimuth. Most of the historical mines are developed in quartz veins and veinlets hosted in a granoblastic granite showing argillic alteration within a sheared fringe. Mapping has identified parallel structures on historical mines in sheared granite with quartz veinlets, oxides, and boxworks of the original sulfides (pyrite, galena, etc.). Immediately north of Santa Lucia is the Las Palomas area, where historical mines were developed on six parallel structures in granoblastic granite, dipping 45 – 50 degrees, 150-degree azimuth, sub-parallel to the Santa Lucia trend. Historical mines tend to be of low angle, at depth with high angle fracturing of gray quartz cutting the main structures and foliation in the granite. The best gold values at Las Palomas site are 26.40 g/t Au producing adjacent samples of 14.60 g/t Au, 5.54 g/t Au, 7.30 g/t Au.  These samples are strongly oxidized with stockwork veining containing boxworks from sulfides and strong hematite alteration. Assay results of samples over 0.1 ppm Au are shown in the Table 1.

 

Table 1 - Gold assay results from rock chip sampling along San Judas Shear zone

ID Sample Target Type of Sample True Width (m) Au g/t Ag g/t Cu g/t Pb g/t Zn g/t
10145 Las Palomas Chips Channel 0.8 26.40 7.70 31 4,803 95
10146 Las Palomas Chips Channel 1.0 14.60 4.80 59 2,164 81
10219 San Martín Chips Channel 1.0 13.70 0.40 49 22 77
10354 Las Palomas Chips Channel 0.5 12.90 2.10 700 982 950
10078 San Martín Chips Channel 2.0 9.20 1.40 45 5 37
10148 Las Palomas Chips Channel 0.8 7.30 9.60 23 1,865 80
10222 San Martín Chips Channel 1.0 7.12 3.30 35 39 24
10201 San Martín Chips Channel 0.2 6.70 1.50 22 469 30
10205 San Martín Chips Channel 1.0 6.23 1.40 46 786 303
10128 Las Palomas Chips Channel 1.0 6.14 6.90 76 1,694 582
10147 Las Palomas Chips Channel 1.0 5.54 2.90 55 3,490 358
10079 San Martín Chips Channel 2.0 5.16 0.70 130 10 47
10213 San Martín Chips Channel 0.6 4.51 4.70 407 3,285 133
10144 Las Palomas Chips Channel 0.5 4.43 2.20 116 1,389 111
10251 Las Palomas Chips Channel 0.4 4.16 4.20 16 2,256 84
10179 San Martin Chips Channel 1.9 4.09 0.50 241 20 59
10142 Las Palomas Chips Channel 0.7 4.08 1.10 52 447 40
10173 San Martin Chips Channel 0.7 3.37 0.40 202 201 223
10220 San Martín Chips Channel 2.0 3.13 0.70 81 44 31
10196 San Martin Chips Channel 2.0 2.84 2.30 46 290 262
10149 Las Palomas Chips Channel 1.5 2.83 0.50 27 829 48
10232 San Martín Chips Channel 1.0 2.70 0.40 168 152 20
10211 San Martín Chips Channel 1.0 2.59 2.70 81 1,452 200
10359 Las Palomas Chips Channel 0.3 2.49 0.70 8 13 34
10218 San Martín Chips Channel 1.0 2.44 0.50 26 16 16
10136 Las Palomas Chips Channel 0.5 2.41 2.10 33 729 17
1913 Las Palomas Dump N/A 2.20 0.90 51 323 390
10356 Las Palomas Chips Channel 0.9 2.01 43.30 164 9,215 3,518
10238 San Martin Chips Channel 0.8 1.71 0.15 15 25 65
10171 San Martin Chips Channel 2.0 1.65 0.15 49 17 77
10187 San Martin Chips Channel 2.0 1.61 3.30 36 247 734
10193 San Martin Chips Channel 2.0 1.59 0.30 28 78 205
10203 San Martín Chips Channel 1.0 1.56 1.40 191 2,464 1,509
10127 Las Palomas Chips Channel 1.0 1.48 0.80 52 254 73
10120 Las Palomas Chips Channel 0.5 1.34 4.30 45 1,389 964
10076 San Martín Chips Channel 2.0 1.27 0.15 31 10 21
10132 Las Palomas Chips Channel 1.1 1.22 6.10 184 3,899 48
10191 San Martin Chips Channel 2.0 1.21 0.80 23 153 307
10192 San Martin Chips Channel 2.0 1.12 2.00 45 151 323
10202 San Martín Chips Channel 1.0 0.93 4.40 95 3,714 2,053
10093 San Martín Chips Channel 2.0 0.81 1.20 68 169 27
10134 Las Palomas Chips Channel 1.5 0.75 7.70 101 3,673 112
10140 Las Palomas Chips Channel 0.5 0.73 1.30 536 888 16
10100 San Martín Chips Channel 1.5 0.64 0.15 38 11 55
10074 San Martín Chips Channel 2.0 0.62 0.15 96 10 18
10091 San Martín Chips Channel 2.0 0.60 0.80 101 72 67
10180 San Martin Chips Channel 2.0 0.59 0.80 133 5 43
10184 San Martin Chips Channel 0.4 0.58 0.15 123 22 42
10353 Las Palomas Chips Channel 0.5 0.57 2.30 177 1,824 47
10174 San Martin Chips Channel 1.3 0.57 0.15 87 73 124
10098 San Martín Chips Channel 2.0 0.50 0.15 51 13 42
1909 San Martín Dump N/A 0.48 0.15 2 14 39
10182 San Martin Chips Channel 0.7 0.44 0.15 98 7 59
10183 San Martin Chips Channel 2.0 0.42 0.15 85 10 68
10221 San Martín Chips Channel 2.0 0.41 0.40 52 77 14
10225 San Martín Chips Channel 0.9 0.40 0.15 53 26 25
10138 Las Palomas Chips Channel 0.8 0.40 1.10 47 190 51
10092 San Martín Chips Channel 2.0 0.39 1.00 50 110 32
10264 Las Palomas Chips Channel 1.0 0.35 0.90 69 44 75
10172 San Martin Chips Channel 1.6 0.31 0.15 45 25 87
10089 San Martín Chips Channel 2.0 0.28 1.40 95 372 74
10175 San Martin Chips Channel 1.8 0.28 0.15 106 40 155
10361 Las Palomas Chips Channel 0.3 0.27 0.40 3 10 29
10164 San Martin Chips Channel 2.0 0.26 0.15 39 62 46
10217 San Martin Chips Channel 2.0 0.24 0.15 119 87 55
10162 San Martin Chips Channel 2.0 0.22 0.60 47 31 30
10206 San Martín Chips Channel 0.9 0.19 0.80 37 709 260
10137 Las Palomas Chips Channel 1.5 0.16 0.50 159 36 22
10226 San Martín Chips Channel 0.6 0.16 0.15 11 15 75
 

San Martin hosts gold in oxidized granite and gneiss pervasive hematite and limonite alterations.  Mineralization is quartz stockwork along foliation and cross cutting quartz veinlets.  San Martin has a series of historical mines positioned 155- and 180-degrees azimuth, dipping strongly to the West and East in lengths that vary from 150 to 200 meters, over an area of 1,250 m in length and 750 meters in width.  Several historical workings and areas of strong hematite alteration were sampled, and assay results are shown in Table 1.  The key take-away of the sampling and geological work to date in the San Martin area is the fact that the historical high-grade small mines are aligned with North-South trending structures with lower grade hematite stockwork in low-angle veining structures in the host rock, opening the possibility of finding high volume bulk deposits.

San Martin Sur lies at the southeastern end of the structural trend formed by the veins system-shear zone of Santa Lucia, Las Palomas and San Martin. Similarly to those, this area is characterized by the existence of shallow historical mining works developed by small prospectors in the past along quartz veins, stockworks filling fractures, fissures and local shears developed along the foliation. The host rock is a biotite-sericite-chlorite gneiss with strong oxidation and with quartz-pegmatite-muscovite, andesitic and gabbro dikes emplaced along pre-existing shear zones and faults. Boudinage areas with varying quartz and pegmatite vein thicknesses are common.  Gold values are associated to two structural systems: 1) One conformed of quartz veins, stockworks, breccias and sulphide boxworks, quartz veins (galena, pyrite, sphalerite), occasionally disseminated fine pyrite, the system is substantially parallel to the foliation of the host rock with azimuths of 75 ° to 100 ° with dips from 22 ° to 55 ° to both, SW and NE and; 2) Another system conformed of veins and quartz veinlets with iron oxides that are mainly 355 ° to 30 ° azimuth high-angle dips that become vertical, primarily hematite and jarosite. Many of the historical works found in this area were developed along this system.  Interpretation results from assays indicate a mineralized structural trend along the Santa Lucia, Las Palomas and San Martin mineral zones, extending up to 4.5 km long and over 1km wide

A total of 72 rock chip samples were taken from the San Martin Sur area; 33 of which returned values above 0.10 g/t. (see Table 3).

Table 2 - Assay result over 0.1 ppm Au on the San Martin Sur target

ID Sample Target Type of Sample True Width (m) Au g/t Ag g/t Cu g/t Pb g/t Zn g/t
10539 Smartin Sur Chip Sample 0.3 34.30 6.00 42 187 35
10554 Smartin Sur Chip Sample 0.2 16.70 1.30 155 4 41
10513 Smartin Sur Chip Sample 0.2 12.50 54.80 62 1,707 138
10538 Smartin Sur Chip Sample 1.2 5.94 0.30 34 30 39
10552 Smartin Sur Chip Sample 0.6 4.97 0.20 77 28 81
10522 Smartin Sur Chip Sample 1.0 3.87 0.50 30 247 80
10515 Smartin Sur Chip Sample 0.6 3.43 6.10 19 322 73
10512 Smartin Sur Chip Sample 1.2 3.27 16.50 56 326 153
10529 Smartin Sur Chip Sample 0.4 3.15 1.00 36 102 39
10446 Smartin Sur Dump 1.0 2.91 14.80 35 263 59
10525 Smartin Sur Chip Sample 1.0 2.34 2.80 67 158 27
10441 Smartin Sur Chip Sample 0.2 2.25 21.30 30 215 115
10562 Smartin Sur Chip Sample 0.6 2.09 1.00 39 519 554
10561 Smartin Sur Chip Sample 0.5 2.00 0.30 63 16 39
10564 Smartin Sur Chip Sample 0.5 1.34 0.20 14 49 55
10537 Smartin Sur Chip Sample 0.2 1.22 0.60 73 31 44
10533 Smartin Sur Chip Sample 0.5 0.81 2.00 51 470 44
10516 Smartin Sur Chip Sample 0.3 0.74 1.50 35 38 49
10553 Smartin Sur Chip Sample 1.5 0.71 0.80 47 69 57
10536 Smartin Sur Chip Sample 1.3 0.69 0.80 67 180 30
10545 Smartin Sur Chip Sample 1.0 0.62 0.40 67 650 116
10557 Smartin Sur Chip Sample 0.9 0.44 3.30 18 24 48
10514 Smartin Sur Chip Sample 0.6 0.41 2.20 79 127 195
10534 Smartin Sur Chip Sample 0.4 0.39 0.40 85 69 52
10546 Smartin Sur Chip Sample 0.5 0.31 2.10 17 151 39
10556 Smartin Sur Chip Sample 0.6 0.21 5.20 19 37 60
10508 Smartin Sur Chip Sample 0.9 0.21 1.70 8 28 45
10505 Smartin Sur Chip Sample 0.7 0.19 0.50 55 8 27
10506 Smartin Sur Chip Sample 1.1 0.13 1.40 47 11 131
10548 Smartin Sur Chip Sample 1.0 0.13 0.20 33 59 163
10563 Smartin Sur Chip Sample 1.2 0.13 2.10 47 251 52
10547 Smartin Sur Chip Sample 1.0 0.13 1.70 43 225 131
10551 Smartin Sur Chip Sample 0.8 0.10 0.90 34 12 95
 

Represo Seco is a high grade sheeted and brecciated vein system with three generations of quartz; white, crystalline quartz and chalcedony-drusy, filling open spaces in granite two meters thick with a strike length of 65 meters at the Represo Seco site and is open ended.  Rock chip samples indicate a strong possibility of stacked gold structures along faults in the granite host.  Magna collected a trench sample that ran 7 g/t Au at Represo Seco.  Mapping and sampling are ongoing to the southwest to the property boundary with outcrops containing stockwork with hematite, jarosite, limonite, sericite alteration, clays, chlorite, bands of crackled jasperoid silica, and fine-grained magnetite disseminated in fractures. The host rock is granite. See table 4).

Table 3 – Assay results over 0.1 ppm Au from Represo Seco target

ID Sample Target Type of Sample True Width (m) Au g/t Ag g/t Cu g/t Pb g/t Zn g/t
1911 Represo Seco Chips Channel 0.5 7.41 2.80 153 226 142
10323 Represo Seco Chips Channel 1.2 6.03 2.40 235 970 76
10322 Represo Seco Chips Channel 1.0 5.08 1.70 209 576 65
1912 Represo Seco Grab sample N/A 3.25 5.10 190 2,417 398
10321 Represo Seco Chips Channel 1.2 2.10 0.70 179 1,312 26
10064 Represo Seco Chips Channel 1.0 1.85 5.50 540 2,799 128
10065 Represo Seco Chips Channel 1.0 1.52 4.20 177 1,538 107
10066 Represo Seco Chips Channel 1.0 0.98 54.90 1,203 8,102 60
10068 Represo Seco Chips Channel 1.5 0.71 10.60 1,255 5,299 79
10315 Represo Seco Chips Channel 0.6 0.43 0.90 82 106 24
10307 Represo Seco Chips Channel 2.0 0.33 0.15 20 14 49
10067 Represo Seco Chips Channel 1.3 0.33 3.10 97 785 77
10320 Represo Seco Chips Channel 0.6 0.21 0.80 157 1,102 64
10069 Represo Seco Chips Channel 1.2 0.19 2.40 259 1,983 61
10062 Represo Seco Chips Channel 1.0 0.13 3.30 76 1,428 99
 

Pepitas is located South of the San Francisco ranch and in between the Cueva de Leon and Represo Seco targets. There is evidence of prior extraction of material with gold nuggets. Although the area is covered by alluvial, there are silicified beds of intrusive and quartz veinlets with gold values at the bedrock. These resemble those from Represo Seco as high grade sheeted and brecciated vein-veinlet systems of low angle, exposed by just a few centimeters. During reconnaissance work along a shallow creek at the north of the Pepitas exposure, there was discovery of another exposure similar to that of Pepitas. Sampling on the structure returned gold values of 2.691 ppm, 0.773, 0.549, 0,111 ppm Au defining and area of high priority of 700 x 500 m. In total for this area, Magna geologists collected 65 rock chip samples from which 16 returned gold values above 0.1 ppm (see Table 5).

Table 4 – Assay results over 0.1 ppm Au from Pepitas target

ID Sample Target Type of Sample True Width (m) Au g/t Ag g/t Cu g/t Pb g/t
10428 Pepitas Chip Channel 0.6 2.69 1.20 18 865
10344 Pepitas Chip Channel 0.3 1.08 0.40 29 107
10416 Pepitas Chip Channel 1.3 0.90 0.70 50 28
10423 Pepitas Chip Channel 1.3 0.77 0.50 100 70
10405 Pepitas Chip Channel 1.0 0.65 0.30 25 15
10427 Pepitas Chip Channel 0.7 0.55 27.60 9 690
10417 Pepitas Chip Channel 1.5 0.54 0.15 33 109
10345 Pepitas Chip Channel 1.3 0.42 0.40 40 57
10419 Pepitas Chip Channel 2.0 0.20 0.15 2 13
10401 Pepitas Chip Channel 0.7 0.20 0.40 28 18
10408 Pepitas Chip Channel 1.0 0.18 0.15 8 25
10346 Pepitas Chip Channel 1.8 0.16 0.15 41 40
10429 Pepitas Chip Channel 0.9 0.15 0.15 27 15
10349 Pepitas Chip Channel 1.3 0.15 0.15 10 6
10426 Pepitas Chip Channel 0.8 0.11 0.60 10 58
10422 Pepitas Chip Channel 1.1 0.10 0.15 2 2
 

Cueva del León hosts argillic altered intrusive felsic rocks that strike from Nto S and dip 45° generally to the west. Initial assays have been in the 1.3 - 3 g/t range.  Located in the south-central portion of the property, it is an area with gold mineralization that extends east to west. The most notable evidence is a series of historical mines occurring along a line of about 100-120 meters. The most important of which is Cueva del Leon, developed along a fault vein of quartz and quartz-hematite stockwork hosted in gneiss. Mineralization projects westward along the valley under the alluvial cover and towards Represo Seco and Pepitas targets, then parallel to the regional mineral structures within the San Judas Shear Zone in the northern part of the property. The next step in the plan is to extend the exploration (mapping and sampling) in both directions of Cueva del Leon structure, perpendicular to the general azimuth of the structure exposed in the adit. The purpose is to determine whether there is continuation of the structure observed to both northeast and southwest. 16 out of a total of 72 samples collected at the La Cueva del Leon area returned gold values above 0.1 ppm (see Table 6).

Table 5 – Assay results over 0.1 ppm Au from Cueva del Leon target

ID Sample Target Type of Sample True Width (m) Au g/t Ag g/t Cu g/t Pb g/t Zn g/t
1901 Cueva de León Chips Channel 1.1 4.99 23.10 641 14,500 67
1903 Cueva de León Chips Channel 1.0 4.28 4.50 149 2,409 84
1908 Cueva de León Chips Channel 1.2 2.03 6.50 294 4,233 40
1902 Cueva de León Chips Channel 1.5 1.90 23.90 318 6,982 54
1905 Cueva de León Chips Channel 1.0 1.80 3.80 96 1,094 53
1907 Cueva de León Chips Channel 1.2 1.01 6.40 195 2,393 27
10038 Cueva de León Chips Channel 1.0 0.99 9.10 50 4,238 79
10040 Cueva de León Chips Channel 1.0 0.83 2.40 29 329 66
10005 Cueva de León Chips Channel 2.0 0.73 5.50 88 3,804 37
10003 Cueva de León Chips Channel 2.0 0.62 4.30 88 704 53
1906 Cueva de León Chips Channel 1.1 0.59 5.00 113 1,734 34
10004 Cueva de León Chips Channel 2.0 0.44 5.50 36 1,587 19
10021 Cueva de León Chips Channel 1.0 0.20 13.00 236 3,439 12
10053 Cueva de León Chips Channel 2.0 0.17 0.15 21 5 118
10039 Cueva de León Chips Channel 1.0 0.15 1.70 49 1,503 91
10049 Cueva de León Chips Channel 1.0 0.11 1.30 31 630 55
1904 Cueva de León Chips Channel 1.0 0.10 4.00 93 910 40
 

Las Auras: Geological reconnaissance and rock chip sampling was carried out in the area known as Las Auras, an isolated historical tunnel carved by small prospectors that extends a few meters over a vein-fault with an azimuth of 345 ° - 70 ° dip, cutting the foliation; the host rock is a gneiss and mineralization is associated with quartz veins and veinlets as well as breccias filling fissures in the gneiss. Ten samples were collected, and results are shown in table 7

Table 6 - Assay results from Las Auras target

ID Sample Target Type of Sample True Width (m) Au g/t Ag g/t Cu g/t Pb g/t Zn g/t
10374 Las Auras Chip Channel 1.2 15.15 7.00 274 5,525 564
10368 Las Auras Chip Channel 0.6 1.23 2.80 367 1,379 3,090
10369 Las Auras Chip Channel 0.5 1.23 2.70 176 1,095 688
10373 Las Auras Chip Channel 0.7 0.63 2.30 373 1,104 5,052
10371 Las Auras Chip Channel 1.0 0.36 1.30 72 407 575
10366 Las Auras Chip Channel 0.5 0.15 2.00 129 483 830
10372 Las Auras Chip Channel 1.0 0.13 0.60 40 282 787
 

Geology and Chip Rock and Soil Sampling Map with Assay Results in 7 mineral targets within the

San Judas Property

A composite map of rock chip/soil sampling and geology indicate the San Judas Shear Zone along  the veins systems of Santa Lucia, Las Palomas, San Martin and San Martin Sur along the NE end of the property; crossing the Sierrita Prieta Hills entirely from NW to SE. On both SE and NW ends, the shear disappears below the alluvial cover. On the SE end, remnants of trenches and small pit exist from were gold was extracted; at the NW end, a preliminary soil sampling line returned high gold values in the projection within the valley of the shear zone. The exploration program for 2020 includes additional soil sampling on the horizon C of the alluvial cover. On the first attempt, samples were collected from the bottom of holes that were 50-60 cm deep.

On the Pepitas and Represo Seco, the soil sampling was replicated W to E and N to S; 1,000 m in length, with samples 100 m apart. 

Rock Chip and Soil Sampling Map with Assay Results on 7 mineral targets within the

San Judas Property

Rock chip and soil sampling map with assay results along Santa Lucia-Las Palomas and San Martin vein and veinlets systems

High definition true color air drone images from rock chip and soil sampling assay results. Infrared imaging section is at Las Palomas, enhancing the hematite halos on the veinlets system.

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