Sonoro GOLD Announces Initial 10,000 Meters Drilling Results from Ongoing Campaign at Cerro Caliche
SONORO GOLD ANNOUNCES INITIAL 10,000 METERS DRILLING RESULTS
FROM ONGOING CAMPAIGN AT CERRO CALICHE
VANCOUVER, Canada, September 1, 2026 – Sonoro Gold Corp. (TSXV: SGO | OTCQB:
SMOFF | FRA: 23SP) (“Sonoro” or the “Company”) is pleased to announce assay results from
the initial 10,000 meters completed as part of an ongoing 50,000-meter drilling campaign at the
Company’s flagship Cerro Caliche gold project in Sonora, Mexico. The objective of the program
is to potentially increase the size, grade and classification of the project’s mineral resource as well
as confirm structural continuity of the northwest-trending mineralized corridors.
A total of 46 reverse circulation drill holes were completed at the central -western region of the
property where the Company proposes to develop an open -pit, heap leach mining operation as
outlined in the technical report titled “Updated Mineral Resource Estimate and Preliminary
Economic Assessment on the Cerro Caliche Gold Project,” dated December 4, 2025 (the “PEA”).
Highlights:
• SCR-340
o 18.29m @ 3.392 g/t Au, 44.3 g/t Ag including:
o 9.14m @ 6.438 g/t Au, 85.8 g/t Ag
• SCR-347
o 13.71m @ 0.704 g/t Au including:
o 1.53m @ 4.439 g/t Au
• SCR-348
o 9.14m @ 3.076 g/t Au, 26.1 g/t Ag including:
o 6.09m @ 4.531 g/t Au, 37.5 g/t Ag
• SCR-349
o 18.29m @ 1.674 g/t Au, 30.4 g/t Ag including:
o 6.10m @ 4.568 g/t Au, 84.6 g/t Ag
• SCR-356
o 15.24m @ 0.648 g/t Au including:
o 3.04m @ 1.299 g/t Au
• SCR-363
o 10.66m @ 0.935 g/t Au including:
o 4.57m @ 1.6 g/t Au
Infill drilling confirms geological continuity and expansion of known mineralized zones while step-
out drilling confirms both lateral and depth extensions of the mineralized corridors. Infill drilling at
the already significant mineralized vein zone of Buena Suerte also confirmed mineralization in
areas previously designated as waste . Targeted drilling at El Quince, the intermediate area
between the central and western mineralized corridors, identified the area as a new and
potentially significant mineralized zone with several higher-grade intervals.
“We have made significant progress to date with the new drilling campaign,” commented Kenneth
MacLeod, President and CEO of Sonoro Gold . “Newly constructed and upgraded access roads
along with extensive geological mapping and surface sampling have optimized drilling targets and
the results have identified a new potentially significant mineralized zone and confirmed extensions
of the mineralized corridors both laterally and at depth . Confirming geological continuity of gold
mineralization between mineralized zones is also significant as it may support connecting the
current pit shells as described in the PEA. This new drilling data will help optimize our geological
model and redefine new drilling targets as we continue with the campaign.”
The map below illustrates the location of the drill holes.
Figure 1: Map of Drilling Location
The map below illustrates the updated mineralization at Cerro Caliche
Figure 2: Map of mineralized zones at Cerro Caliche
El Quince Zone
Target drilling at El Quince returned multiple intercepts of high -grade mineralization confirming
this previously undrilled area as a potentially significant zone within the Cerro Caliche mineralized
system. Due to steep topography, access to the area had been limited in prior exploration
programs.
Extensive geological mapping, surface rock sampling and review of historical mine workings
identified similar geological, structural and mineralized characteristics to those already identified
at Cerro Caliche. With the construction of access roads by the Company , previously defined
geological targets were drilled and assayed, confirming mineralization at El Quince to be
associated with the project’s northwest-trending structures and corridors.
Drill holes SCR-348 and SCR-349 both intersected higher grades of gold with high silver content,
implying the zone was possibly downfaulted from a higher elevation. SCR-348 returned 9.14m @
3.076 g/t Au and 26.10 g/t Ag, including 6.09m @ 4.531 g/t Au and 37.5 g/t Ag and SCR -349
returned 18.29m @ 1.674 g/t Au and 30.40 g/t Ag, including 6.10m @ 4.568 g/t Au and 84.60 g/t
Ag.
A total of 15 drill holes were completed at El Quince with i ntercepts confirm ing significant
mineralization that may increase both the size and grade of the project’s overall resource.
Drill holes SCR-333, SCR-334 and SCR-338 appear to have all intersected the Cabeza Blanca
vein at depth as assay results demonstrated similar widespread lower grade gold mineralization.
SCR-333 intercepted 6.10m @ 0.892 g/t Au, SCR-334 intercepted 6.09m @ 0.578 g/t Au and
SCR-338 intercepted 10.66m @ 0.488 g/t Au.
Drill holes SCR-337 and SCR-354 intersected mineralized intervals of 9.15m @ 0.633 g/t Au and
24.38m @ 0.368 g/t Au in the footwall of the northeasterly trending post mineral faul t at San
Quintin, representing lateral extensions of the mineralization.
Figure 3: Cross Section of El Colorado, El Quince- Buena Suerte, Japoneses Mineralized Corridors
Buena Suerte Mineralized Zone
Buena Suerte is a significant mineralized vein zone on the property and targeted drilling at El
Quince confirms the new ly identified mineralized zone con tinues northward and merges into
Buena Suerte.
Step-out drilling in the footwall of the northeasterly trending post-mineral fault noted above at San
Quintin also confirmed lateral extensions of Buena Suerte with drill holes SCR-355, SCR-356 and
SCR-357 intercepting 3.05m @ 1.163 g/t Au, 15.24m @ 0.648 g/t Au and 9.14m @ 0.521 g/t Au
respectively.
Detailed geological mapping and surface sampling of areas at Buena Suerte previously
designated for waste rock storage facilities as outline d in the PEA , demonstrated evidence of
mineralization, including stockworks, parallel quartz veinlets and hydrothermal breccias.
These zones will no longer be considered for waste rock storage as an alternative site has been
identified.
Nine t argeted infill drill holes were completed within this area previously modelled as waste
confirming mineralization and the expansion of the Buena Suerte defined mineraliz ed zone.
Notable returns including drill holes:
• SCR-328: 6.10m @ 0.546 g/t Au; including 3.05m @ 1.008 g/t Au
• SCR-362: 9.15m @ 0.607 g/t Au; including 1.52m @2.35 g/t Au
• SCR-363: 10.66m @ 0.935m g/t Au; including 4.57m @ 1.6 g/t Au and
7.62m @ 0.496 g/t Au including 1.52m @ 1.338 g/t Au
Figure 4: Cross Section of Guadalupe-Cabeza Blanca, Buena Suerte, Japoneses Mineralized Corridors
Cabeza Blanca, Guadalupe and El Colorado Mineralized Zones
Targeted drilling within and surrounding the mineral resource at Cabeza Blanca, Guadalupe and
El Colorado investigated the potential continuity between the zones. Results confirm continuous
gold mineralization between the zones , expanding known mineralization and potentially
connecting the proposed pit shells within the mine plan as outlined in the PEA.
Several drill holes returned higher grade intercepts including SCR-340 which intercepted 18.29m
@ 3.39 g/t Au including 9.14m @ 6.43 g/t Au and 10.67m @ 1.23 g/t Au including 1.52m @ 7.12
g/t Au as well as drill hole SCR-358 which intercepted 7.62m @ 0.63 g/t Au including 1.52m @
2.11 g/t Au.
Results also confirm mineralization extending laterally and at depth with several zones remaining
open with the potential to expand the mineralized corridors.
The following table provides selected drill results with interval grading of 1.0 g/t Au or greater.
Cerro Caliche Project, Holes Composites with Cut-off 0.13 g/t Au
Hole Target From To Interval Au Ag
Meters g/t g/t
SCR-328 BUENA SUERTE
53.44 59.44 6.10 0.546 0.20
includes 53.44 56.39 3.05 1.008 0.30
SCR-330 BUENA SUERTE 128.02 132.59 4.57 2.547 1.00
SCR-331 BUENA SUERTE
7.62 12.19 4.57 0.501 0.80
includes 7.62 9.14 1.52 1.167 0.90
SCR-333
EL QUINCE –
CABEZA BLANCA -
GUADALUPE
272.80 278.89 6.09 0.535 0.60
includes 272.80 274.32 1.52 1.001 1.20
and 312.42 318.52 6.10 0.892 2.60
includes 315.47 316.99 3.05 1.359 1.10
SCR-334
EL QUINCE - CABEZA
BLANCA -
GUADALUPE
188.98 195.67 6.09 0.578 0.50
includes 188.98 192.02 3.04 1.043 1.00
and 390.14 391.67 1.53 1.299 0.90
SCR-337 EL QUINCE
6.10 7.62 1.52 0.472 2.10
and 22.86 25.91 3.05 1.304 0.50
and 73.15 82.30 9.15 0.633 1.10
includes 74.68 76.20 1.52 1.874 2.10
SCR-338
EL QUINCE –
CABEZA BLANCA -
GUADALUPE
211.84 222.50 10.66 0.488 1.10
includes 217.93 219.46 1.53 1.019 0.70
SCR-340 CABEZA BLANCA -
GUADALUPE
1.52 19.81 18.29 3.392 44.30
includes 3.05 12.19 9.14 6.438 85.80
and 47.24 57.91 10.67 1.232 0.90
includes 51.82 53.34 1.52 7.125 4.00
and 76.20 79.25 3.05 0.721 0.80
includes 76.20 77.72 1.52 1.102 0.90
and 124.97 131.06 6.09 0.745 0.80
includes 128.02 129.54 1.52 2.178 0.90
SCR-345 EL QUINCE
60.96 67.06 6.10 0.484 0.70
includes 60.96 62.48 1.52 1.243 0.70
SCR-346 EL QUINCE
7.62 21.34 13.72 0.276 0.40
includes 12.19 13.72 1.53 1.055 1.10
Cerro Caliche Project, Holes Composites with Cut-off 0.13 g/t Au
Hole Target From To Interval Au Ag
Meters g/t g/t
and 35.05 36.58 1.53 2.101 1.60
and 141.73 164.59 22.86 0.369 0.80
includes 152.40 153.92 1.52 1.393 1.20
SCR-347 EL QUINCE
71.63 85.34 13.71 0.704 4.00
includes 77.72 79.25 1.53 4.439 15.10
SCR-348 EL QUINCE
27.43 32.00 4.57 2.225 50.70
and 56.39 65.53 9.14 3.076 26.10
includes 56.39 62.48 6.09 4.531 37.50
and 188.98 190.50 1.52 5.978 1.80
SCR-349 EL QUINCE
12.19 16.76 4.57 0.538 9.60
includes 13.72 15.24 1.52 1.067 19.80
and 22.86 30.48 7.62 1.199 36.20
includes 24.38 27.43 3.05 2.398 76.70
and 54.86 73.15 18.29 1.674 30.40
includes 62.48 68.58 6.10 4.568 84.60
SCR-350 EL QUINCE
161.54 167.64 6.10 0.914 0.30
includes 163.07 164.59 1.52 1.836 0.15
includes 166.12 167.64 1.52 1.446 0.80
SCR-351 EL QUINCE
35.05 39.62 4.57 0.455 1.10
includes 36.58 38.10 1.52 1.027 0.90
and 59.44 60.96 1.52 3.091 11.20
SCR-352 EL QUINCE 144.78 146.30 1.52 2.327 7.30
SCR-353 EL QUINCE
38.10 44.20 6.10 1.443 0.20
includes 41.15 44.20 3.05 2.399 0.20
SCR-354 EL QUINCE –
SAN QUINTIN
51.82 76.20 24.38 0.368 1.40
includes 60.96 62.48 1.52 1.355 1.50
SCR-355 BUENA SUERTE -
SAN QUINTIN
193.55 196.60 3.05 1.163 0.20
includes 193.55 195.07 1.52 1.941 0.15
SCR-356 BUENA SUERTE -
SAN QUINTIN
9.14 24.38 15.24 0.648 0.80
includes 13.72 16.76 3.04 1.299 0.60
includes 21.34 22.86 1.52 1.078 1.20
SCR-357 BUENA SUERTE -
SAN QUINTIN
7.62 16.76 9.14 0.521 0.70
includes 7.62 9.14 1.52 1.882 1.90
SCR-358 GUADALUPE
0.00 3.05 3.05 1.098 0.90
includes 1.52 3.05 1.53 1.754 1.10
and 74.68 82.30 7.62 0.626 0.80
includes 76.20 77.72 1.52 2.105 0.15
and 129.54 131.06 1.52 1.015 0.15
Cerro Caliche Project, Holes Composites with Cut-off 0.13 g/t Au
Hole Target From To Interval Au Ag
Meters g/t g/t
SCR-359 CABEZA BLANCA -
GUADALUPE
35.05 41.15 6.10 0.374 0.20
includes 35.05 36.58 1.53 1.104 0.15
and 76.20 89.92 13.72 0.372 0.60
includes 77.72 79.25 1.52 1.047 0.15
SCR-362 BUENA SUERTE
74.68 80.77 6.09 0.525 0.90
includes 74.68 76.20 1.52 1.347 0.60
and 115.80 125.00 9.15 0.607 5.40
includes 117.40 118.90 1.52 2.350 21.60
SCR-363 BUENA SUERTE
6.10 16.76 10.66 0.935 6.20
includes 6.10 10.67 4.57 1.600 13.50
and 33.53 41.15 7.62 0.496 0.30
includes 36.58 38.10 1.52 1.338 0.40
SCR-365 BUENA SUERTE
9.14 27.43 18.29 0.381 1.40
includes 19.81 21.34 1.53 1.298 1.40
and 97.54 105.16 7.62 0.485 0.60
includes 97.54 99.06 1.52 1.758 2.00
and 118.87 128.02 9.15 0.365 2.60
includes 118.87 120.40 1.53 1.102 3.10
SCR-370 BUENA SUERTE
91.44 94.49 3.05 2.084 26.20
includes 92.96 94.49 1.53 4.004 47.60
SCR-371 GUADALUPE
0.00 15.24 15.24 0.358 1.70
includes 10.67 12.19 1.52 1.172 1.50
SCR-373 GUADALUPE and 131.06 132.59 1.53 1.007 1.10
The reported gold and silver grades are analytical results taken directly from assay certificates
issued by Bureau Veritas and are reported uncut. The drill results presented herein are exploration
results and do not constitute an updated mineral resource estimate. The results will be
incorporated into the geological model and evaluated as part of a future mineral resource estimate
update prepared in accordance with NI 43-101.
Mineralized intervals were composited using a nominal reporting cut-off grade of 0.13 g/t Au. This
reporting criterion is used solely to present the continuity of the intercepted mineralization and
does not represent a new mineral resource estimate or an assessment of economic viability.
True widths are estimated to represent approximately 60% to 90% of the reported drilled interval
lengths. Drill holes were completed at inclinations ranging from –45° to –70° and were oriented
to intersect the mineralized structures as close to perpendicular as practicable. With the exception
of the Guadalupe and El Colorado zones, the mineralized structures generally have steep dips
approaching vertical.