Amalia Project- Mexico

  • Amalia Project

    The Amalia Project is located 25 km SW of the historic Guadalupe y Calvo mining district in Chihuahua (Figure 1). Radius geologists discovered high grade epithermal silver-gold mineralization in several veins, vein breccias, and disseminated zones over 3.5 km of strike length and a 750 m vertical interval following the trace of a large regional fault zone. Radius initially acquired the 380 hectare core license and subsequently staked an additional regional license covering multiple target areas (Figure 2) that totals 10,250 hectares. In July 2018 Radius entered into an agreement with Pan American Silver Corp. ("Pan American") to drill and explore the project.

    Mining Property

    The 10,250 hectare property includes the Amalia, California and El Cuervo major vein systems (Figure 2).  Within these major vein systems are multiple targets, outlined in Figure 3, all of which are included in Radius's consolidated concessions that extend for more than 10 km of strike length of the regional fault.

    Structures:

    • Amalia Vein, 3 km length with high grade Au-Ag, includes drill defined San Pedro high grade zone (Figure 4, 5, 6)

    • California Vein, 2 km length with high grade Au-Ag on surface and in drilling (Figure 7)
    • El Cuervo Vein, 1 km length with anomalous Ag-Au, pending drill results (Figure 8).

    Geology and Mineralization:

    The main targets at Amalia are located along a large regional scale NW trending fault system, which separates the upper rhyolite volcanics from the lower andesite volcanics. Radius has identified outcropping mineralization over 3.5 km along this structural break. The principal target at San Pedro, outcrops as a 500m x 70m zone of intense epithermal multiphase silicification, and brecciation with stockwork veining occurring at the contact between the upper rhyolite and lower andesite volcanic sequence. Figure 9 showcases multiphase silicification events in drill core from San Pedro. See Figures 10 and 11 for 1m core samples with electrum mineralization within the quartz sulphide stockwork zone. 

    Summary of Drilling

    45 drill holes totalling 14,402m has been completed at the Amalia project. 10,588m in 31 drillholes has been completed on the Amalia vein system, and 3,814m in 14 drillholes completed in the California vein system. The drilling initially focused on the San Pedro target and has identified a coherent shoot of high grade gold-silver mineralization commencing at surface and continuously defined 450m down dip.


    Table of Intercepts – Amalia Vein System

    DRILLHOLE FROM (m) TO (m) INTERVAL (m) EST. TRUE WIDTH Ag (g/t) Au (g/t)

    AMDD18-001

    44.35

    56.35

    12.00

    9.5

    44

    0.10

    AMDD18-002

    no significant mineralized intercepts

    AMDD18-003

    107.44

    137.44

    30.00

    24

    65

    0.30

    AMDD18-004

    no significant mineralized intercepts

    AMDD18-005

    no significant mineralized intercepts

    AMDD18-006

    no significant mineralized intercepts

    AMDD18-007

    129.10

    133.10

    4.00

    3

    229

    0.29

    AMDD18-008

    98.65

    99.65

    1.00

    0.8

    521

    2.28

    And

    126.65

    131.65

    5.00

    4

    571

    1.14

    AMDD18-009

    140.35

    174.35

    34.00

    29.44

    406

    6.13

    Including

    144.35

    170.35

    26.00

    22

    517

    7.80

    Including

    165.35

    170.35

    5.00

    4

    1378

    14.71

    AMDD19-010

    210.70

    254.70

    44.00

    34

    309

    12.39

    AMDD19-011

    170.50

    176.50

    6.00

    4

    24

    1.05

    Including

    173.50

    175.00

    1.50

    1.06

    31

    2.52

    AMDD19-012

    176.90

    181.90

    5.00

    4

    647

    0.09

    AMDD19-013

    no significant mineralized intercepts

    AMDD19-014

    235.70

    263.70

    28.00

    24

    126

    2.30

    Including

    256.70

    259.70

    3.00

    2.6

    761

    9.85

    AMDD19-015

    213.70

    317.70

    104.00

    74.8

    55

    3.10

    Including

    216.70

    297.70

    81.00

    65

    61

    3.75

    Including

    234.70

    255.70

    21.00

    17

    65

    7.91

    AMDD19-016

    251.20

    371.20

    120.00

    78

    21

    1.53

    Including

    252.45

    318.25

    65.80

    43

    23

    2.36

    Including

    293.20

    316.40

    23.20

    15

    41

    4.61

    AMDD19-017

    316.55

    322.10

    5.55

    4.19

    -

    0.88

    AMDD19-018

    268.15

    269.45

    1.30

    0.75

    2320

    12.50

    And

    332.45

    346.10

    13.65

    7.83

    22

    1.39

    AMDD19-019

    336.70

    344.10

    7.40

    6.34

    22

    0.49

    AMDD20-020

    no significant mineralized intercepts

    AMDD20-021

    no significant mineralized intercepts

    AMDD20-022

    313.05

    336.15

    23.10

    14.50

    321

    6.80

    Including

    319.40

    325.65

    6.25

    4.18

    813

    18.34

    AMDD21-023

    520.85

    530.40

    9.55

    6.50

    151

    0.59

    AMDD21-024

    no significant mineralized intercepts

    AMDD21-025

    150.85

    151.70

    0.85

    0.60

    475

    1.48

    And

    170.85

    178.45

    7.60

    5.00

    70

    1.73

    And

    239.75

    249.40

    9.65

    7.28

    57

    0.36

    And

    274.25

    277.85

    3.60

    2.72

    55

    0.32

    And

    285.85

    293.90

    8.05

    5.50

    99

    0.93

    AMDD21-026

    165.50

    166.65

    1.15

    0.80

    151

    3.32

    And

    239.75

    243.40

    3.65

    2.37

    70

    1.81

    And

    283.40

    284.45

    1.05

    0.70

    53

    4.59

    And

    320.70

    323.70

    3.00

    2.00

    8

    3.17

    And

    347.00

    347.95

    0.95

    0.62

    65

    0.57

    And

    352.90

    353.40

    0.50

    0.33

    115

    0.25

    AMDD21-027

    no significant mineralized intercepts

    AMDD21-028

    no significant mineralized intercepts

    AMDD21-029

    no significant mineralized intercepts

    AMDD21-030

    no significant mineralized intercepts

    AMDD21-031

    133.75

    147.00

    13.25

    13.25

    117

    0.90

    The most recent program targeted the California vein system defining wide Au-Ag mineralization across 1km of strike length. The initial shallow drilling has intersected multiphase breccias and stockwork veins with significant widths up to 50m and high grades with individual samples up to 4210 g/t Ag and 33.1 g/t Au. See Figure 12 for a drill core photo of Ag-Au mineralization from the California vein. Some results from drilling at California are still pending. See Figures 15 to 20 for cross sections of the drilling at California vein system with results.


    Table of Intercepts – California Vein System

    DRILLHOLE FROM (m) TO (m) INTERVAL (m) EST. TRUE WIDTH Ag (g/t) Au (g/t)

    AMDD21-032

    38.10

    44.30

    6.20

    5.62

    93

    0.43

    And

    62.70

    90.00

    27.30

    24.74

    90

    0.26

    Including

    78.00

    80.35

    2.35

    2.13

    220

    0.61

    Including

    86.00

    88.60

    2.60

    2.36

    263

    1.37

    AMDD21-033

    148.60

    199.00

    50.40

    23.66

    50

    0.05

    Including

    178.80

    194.25

    15.45

    7.25

    68

    0.07

    Including

    188.20

    192.40

    4.20

    1.97

    113

    0.12

    AMDD21-034

    145.70

    149.65

    3.95

    3.58

    487

    2.15

    Including

    146.80

    149.65

    2.85

    2.58

    658

    2.96

    Including

    148.00

    148.50

    0.50

    0.45

    2810

    15.15

    AMDD21-035

    212.65

    229.80

    17.15

    10.32

    35

    0.07

    And

    243.10

    243.50

    0.40

    0.24

    482

    3.36

    AMDD21-036

    108.60

    110.35

    1.75

    1.59

    578

    0.27

    Including

    109.90

    110.35

    0.45

    0.41

    1930

    0.71

    AMDD21-037

    177.95

    180.40

    2.45

    1.30

    37

    0.18

    Including

    177.95

    178.55

    0.60

    0.32

    54

    0.53

    AMDD21-038

    151.00

    162.20

    11.20

    9.06

    379

    1.26

    Including

    156.20

    157.00

    0.80

    0.65

    4244

    16.96

    Including

    156.20

    156.55

    0.35

    0.28

    4210

    33.10

    AMDD21-039

    308.20

    335.10

    26.90

    20.30

    353

    2.59

    Including

    308.20

    331.90

    23.70

    17.89

    394

    2.93

    Including

    314.45

    321.95

    7.50

    5.66

    976

    7.38

    Including

    317.85

    321.95

    4.10

    3.09

    1520

    12.61

    AMDD21-040

    385.35

    396.50

    11.15

    6.55

    99

    0.64

    Including

    385.35

    393.55

    8.20

    4.82

    120

    0.78

    Including

    388.45

    391.10

    2.65

    1.56

    210

    1.12

    Including

    389.60

    391.10

    1.50

    0.88

    249

    1.28

    AMDD21-041

    144.00

    145.25

    1.25

    1.13

    36

    0.03

    AMDD21-042

    216.95

    218.50

    1.55

    0.89

    24

    0.003

    AMDD21-043

    102.25

    115.00

    12.75

    9.48

    259

    0.54

    Including

    108.05

    114.05

    6.00

    4.46

    483

    1.06

    Including

    108.05

    111.25

    3.20

    2.38

    705

    1.92

    AMDD21-044

    273.00

    312.65

    39.65

    29.47

    204

    0.35

    Including

    283.00

    312.65

    29.65

    22.03

    256

    0.44

    Including

    287.50

    306.55

    19.05

    14.16

    346

    0.63

    Including

    301.00

    306.55

    5.55

    4.12

    770

    1.69

    Including

    304.00

    305.65

    1.65

    1.23

    1446

    5.11

    Including

    305.00

    305.65

    0.65

    0.48

    2470

    11.90

    AMDD21-045

    333.75

    421.00

    87.25

    50.04

    60

    0.05

    Including

    339.50

    350.45

    10.95

    6.28

    104

    0.09

    Including

    359.50

    362.60

    3.10

    1.78

    165

    0.08

    Including

    413.90

    417.20

    3.30

    1.89

    187

    0.29

    The current drill program is focused on the sub-parallel El Cuervo structure where stockwork veining and breccias up to 40m wide have been defined semi-continuously for 1.5km and surface rock chip samples returned up to 637 g/t Ag and 2.24 g/t Au. (Figure 13).

     

    Exploration Targets

    Palmillas Target

    The Palmillas target is a small historic working 1.5km along the Amalia Fault from the San Pedro zone. At Palmillas, Radius took a 4m section that assayed 9.5 g/t Au and 73 g/t Ag, and a 10.5m section that assayed 1.54 g/t Au and 58 g/t Ag. Mineralization is hosted within fault-controlled quartz vein breccias similar in style to San Pedro (Figure 14).

    Within the 10,250 hectare Amalia Property are multiple prospects including Palmillas, Dulces, Guadalupe and Durazno, which have been prospected and are developing as future drilling targets.

    Oro Viejo, La Caverna, California SE, El Pando

    Untested vein breccia targets along the California vein system, with gold grades from below detection to 27 g/t

    Quality Assurance and Quality Control

    Pan American Silver has been the operator on Amalia since Q3 of 2019; all their surface samples and drill core have been analyzed at an ISO/IEC accredited ALS Geochemistry laboratory.

    Previous rock samples are acquired by Radius Gold's geologists and trained sampling teams under the supervision of the geologists. Majority of the rock samples consist of chip channels ranging from 0.5 to 3m. These samples are forwarded to an ALS Geochemistry laboratory for analysis of Au, Ag and other elements using ALS codes Au-ICP21 and ME-ICP61. Au-ICP21 is a fire assay method with an ICP-AES finish for Au. ME-ICP21 is a 33 multi-element (includes Ag) analysis that uses a four acid-digestion with an ICP-AES finish. For over-limits of Au or Ag, analysis using a fire assay method with gravimetric finish is automatically conducted. Quality control samples (blankets, standards etc.) are included with the field samples at regular intervals. The QA samples' results are monitored to ensure the returned results are within the acceptable range.

  • Amalia

    San Pedro

    California

  • AMDD18-009

    AMDD19-010

    AMDD19-014

    AMDD19-015

  • February 23, 2021

    Bruce Smith Reviews the Amalia Project