Mr. Kenneth MacLeod reports
SONORO DRILLS 45.72 METRES OF 0.972 GRAMS PER TONNE IN NEW ZONE AT CERRO CALICHE
Assay results from an additional 20 reverse circulation (RC) drill holes at Sonoro Gold Corp.'s Cerro Caliche project in Sonora state, Mexico, include several of the best gold grade intercepts recorded to date on the property. The company expects that these results will contribute to establishing a significant addition to Cerro Caliche's existing 201,000-ounce AuEq (gold equivalent) inferred resource (1) estimate.
This group of drill holes has successfully enlarged the northwest and southeast extensions of the higher-grade mineralization at the now 450-metre-long
Buena Suerte
zone, which remains open along strike to the northwest and southeast, in addition to extending the strike length of the premier Japoneses mineralized body. The Japoneses increase, which occurred at the northerly Buena Vista and El Boludito extensions and the southerly extension at Cuervos, now demonstrate a continuous strike length
of 1.3
kilometres. As in each of the previous 107 drill holes, all 20 of the current group of drill holes encountered reportable mineralization. Assay highlights include the following key intercepts.
At Buena Suerte, SCR-109 successfully tested for a potential northwestern extension along strike and intercepted 45.72 metres averaging 0.97 gram per tonne Au, from 3.05 metres to 48.77 metres, including 15.24
metres averaging 2.1 g/t Au. Hole SCR-124
tested for the Buena Suerte zone's extension along strike to the
southeast and intercepted 6.09 metres averaging 3.99 g/t Au, beginning at 71.63 metres, including 3.04 metres averaging 7.80 g/t Au. SCR-127, which is located near the middle of the zone, intercepted 10.67 metres averaging 0.96 g/t, including 1.52 metres averaging 2.81 g/t Au.
Drilling at the Buena Vista zone confirms that it represents the uninterrupted northwesterly extension component of the Japoneses zone and it remains open along strike to the northwest. Multiple intercepts demonstrate mineralization to over 80-metre depth with deeper potential:
- SCR-110 intercepted 12.19
metres averaging 0.94 g/t Au, including 6.1 metres averaging 1.47 g/t Au;
-
SCR-112 intercepted 27.43 metres averaging 0.48 g/t Au;
-
SCR 118 intercepted 19.81 metres averaging 0.57 g/t Au, including 1.53 metres averaging 2.34 g/t Au.
At the northernmost extension of the Japoneses zone, hole SCR-111 at El
Boludito intercepted 1.52
metres averaging 2.26 g/t Au and 34.5 g/t Ag. While most intercepts recorded low silver grades, the higher silver grade at SCR-111 reflected the intercept's higher vertical level in the epithermal vein zoning. The Cuervos zone at the southern extension of Japoneses continues to report strong mineralization, with SCR-122 intercepting 3.05 metres averaging 1.12 g/t Au.
All drill holes are inclined 45 degrees crossing the intervals near perpendicular to the vein's plane of mineralization. Interval true lengths are near the reported interval length but may be slightly less due to variations in vein zone dips. A cut-off of 0.15 g/t Au was used for reporting intervals and, for consistency, is in the same format as in all previous news reports.
BUENA SUERTE ZONE -- ASSAY RESULTS
Cerro Caliche project, hole composites with cut-off of 0.15 Au g/t
Hole Target From To Interval Au Ag AuEq
(metres) g/t g/t g/t
SCR-109 Buena Suerte 3.05 48.77 45.72 0.972 4.0 1.029
includes 7.62 22.86 15.24 2.101 9.7 2.239
and 53.34 54.86 1.52 2.68 0.7 2.69
and 167.64 169.16 1.52 1.335 0.1 1.336
and 175.26 178.31 3.05 0.253 0.3 0.25
SCR-124 Buena Suerte 7.62 10.67 3.05 0.500 31.0 0.936
and 16.76 21.34 4.58 0.285 0.3 0.290
and 39.62 42.67 3.05 0.298 1.0 0.318
and 62.48 65.53 3.05 0.826 0.9 0.840
and 71.63 77.72 6.09 3.987 9.0 4.118
includes 76.2 77.72 1.52 7.803 15.0 8.015
SCR-125 Buena Suerte 4.57 7.62 3.05 0.366 9.0 0.497
SCR-126 Buena Suerte 15.24 25.91 10.67 0.243 0.7 0.254
and 36.58 45.72 9.14 0.446 12.0 0.613
and 57.91 64.28 4.57 0.231 3.0 0.277
SCR-127 Buena Suerte 41.15 51.82 10.67 0.958 13.0 1.14
includes 44.2 45.72 1.52 2.811 30.0 3.242
and 59.44 62.48 3.04 0.360 2.0 0.392
The Buena Suerte zone is independent of other zones, occurring 150 to 200 metres west of the Japoneses mineralized body. Most of this zone has thin soil cover, especially over the north slope trace of vein extension. The Buena Suerte zone is now confirmed to have more than 450 metres of strike length that is up to 30 metres wide with 80 metres of depth. Host rocks are shattered and veined quartzite with local intrusive rhyolite and minor andesite dikes. Further drilling in this zone has been designed to extend the mineralized zone both to the north and south.
JAPONESES ZONE -- ASSAY RESULTS (INCLUDES BUENA VISTA, EL BOLUDITO AND CUERVOS)
Cerro Caliche project, hole composites with cut-off of 0.15 Au g/t
Hole Target From To Interval A u Ag AuEq
(metres) g/t g/t g/t
SCR-108 Japoneses 64.01 67.06 3.05 0.202 1.9 0.229
and 109.73 114.3 4.57 0.25 2.2 0.282
and 121.92 129.54 7.62 0.307 0.4 0.312
and 156.97 164.59 7.62 0.404 0.2 0.407
SCR-110 Buena Vista 19.81 24.38 4.57 0.254 0.6 0.263
and 47.24 60.96 13.72 0.304 0.5 0.322
and 102.11 114.3 12.19 0.941 3.2 0.987
includes 103.63 109.73 6.1 1.47 2.5 1.505
and 131.06 165.54 4.58 0.568 0.4 0.574
SCR-111 El Boludito 51.82 53.34 1.52 2.26 34.5 2.753
SCR-112 Buena Vista 13.72 16.76 3.04 0.321 0.5 0.329
and 22.86 25.91 3.05 0.362 0.4 0.367
and 30.48 39.62 9.14 0.216 0.5 0.224
and 42.67 70.1 27.43 0.484 0.7 0.494
and 77.72 80.77 3.05 0.221 0.3 0.224
SCR-113 Japoneses 4.57 7.62 3.05 0.261 0.4 0.267
and 21.34 24.38 3.04 0.293 0.3 0.298
and 56.39 60.96 4.57 0.393 0.4 0.399
SCR-114 Japoneses 30.48 47.24 16.76 0.333 6.5 0.426
and 70.1 73.15 3.05 0.433 1.2 0.450
and 80.77 88.39 7.62 0.373 0.7 0.383
SCR-115 Buena Vista 0 4.57 4.57 0.539 6.0 0.624
and 16.76 24.38 7.62 0.276 7.0 0.379
and 32.00 44.20 12.2 0.22 3.6 0.272
and 54.86 60.96 6.1 0.219 5.4 0.296
and 73.15 82.3 9.15 0.543 2.3 0.577
SCR-116 Buena Vista 15.24 19.81 4.57 0.210 7.5 0.317
and 27.43 32.00 4.57 0.433 12.0 0.599
and 38.10 41.15 3.05 0.446 1.3 0.464
SCR-117 Buena Vista 30.48 35.05 4.57 1.033 6.0 1.119
includes 33.53 35.05 1.52 2.64 6.0 2.727
and 44.2 53.34 9.14 0.318 3.0 0.359
and 56.39 70.1 13.71 0.364 0.4 0.369
SCR-118 Buena Vista 0 13.72 13.72 0.267 6.0 0.346
and 18.29 27.43 9.14 0.230 7.0 0.326
and 45.72 48.77 3.05 0.187 5.0 0.251
and 50.29 70.1 19.81 0.566 5.0 0.631
includes 62.48 64.01 1.53 2.34 17.0 2.589
SCR-119 Cuervos 12.19 18.29 6.1 0.664 6.0 0.753
and 65.53 73.15 7.62 0.354 1.0 0.37
SCR-120 Cuervos 18.29 22.86 4.57 0.307 3.0 0.345
SCR-121 Cuervos 30.48 36.58 6.1 0.461 7.0 0.565
SCR-122 Cuervos 9.14 12.19 3.05 0.349 0.4 0.355
and 48.77 51.82 3.05 1.117 4.0 1.167
SCR-123 Cuervos 25.91 41.15 15.24 0.447 3.0 0.486
The drill holes are part of the program to define limits of gold mineralization within the Japoneses mineralized material zone that includes the Japoneses mine zone, the Cuervos mine zone, Boludito zone and Buena Vista zone. The geology in these zones is mainly mineralized structures crossing Mesozoic age quartzite with many fracture zones. This entire mineralized zone is a series of northwest-trending veins, shears and shatter bands in quartzite with shales in its central and southern parts. The northern extension of the Japoneses zone gold mineralization passes into andesite and vein associated rhyolitic dikes where both rock units host gold mineralization.
In total, 44 RC holes have been drilled this year to date, of which 32 have been reported, including the current group of holes. An additional 20 to 25 RC holes are expected to be completed by this coming mid-December and the company expects that the results of all the drill holes to that date will be incorporated into a new National Instrument 43-101 technical report for publication in the new year.
Melvin Herdrick, Sonoro's vice-president, exploration, stated: "The evident success of the new RC drilling along with the parallel new exploratory core drilling that is oriented toward high-grade targeting will be combined into a planned
updated
resource estimate
in early 2021. We anticipate that news in December will also include results from core drilling at El Colorado, where the potential for shoot definition exists, in addition to other more exploratory findings from satellite zones."
Kenneth MacLeod, Sonoro's president and chief executive officer, added: "The latest assay results from Buena Suerte provide compelling evidence that it has become one of the prime targets for developing a new, higher grade mineralized zone at Cerro Caliche.
We are confident that the current results will contribute to a material increase of the
current
inferred resource estimate at Cerro Caliche."
John Darch, Sonoro's chairman, further added: "The apparent increase in gold grades and substantial intercept widths adds to our
confidence
regarding both the viability of our planned 8,000-ton-per-day mining operation which is targeted to commence production next December, 2021, and our longer term goal of materially increasing the size of the
mineralized
body
and
proposed
mine by continuing to successfully explore and develop the property."
The current exploration work is part of the company's conceptual fast-track development schedule for the Cerro Caliche project with the aspirational goal of commencing gold production by the end of 2021. Key milestones, whose achievement is essential for the successful realization of this goal, include the satisfactory completion of metallurgical testing, securing the required environmental permitting, receiving a favourable preliminary economic assessment (PEA) and obtaining the necessary project financing. On Nov. 18, 2021, the company announced that it had retained McClelland Laboratories Inc. of Sparks, Nev., to conduct independent metallurgical testing. These tests are a fundamental component of the PEA which in turn is expected to be completed by April, 2021. Earlier this year, after a period of extensive analysis of the Cerro Caliche project data, a major China-based engineering, procurement and construction (EPC) company executed a memorandum of understanding with Sonoro making it the third EPC company to formally pursue discussions with the company regarding the proposed mine's financing and development.
Quality assurance/quality control (QA/QC) measures and analytical procedures
Drill samples are collected with an airstream cyclone and passed into a splitter that divides each sample into quarters. The quartered samples are then bagged and sealed with identification. The sample group has blanks, standards and duplicates inserted into the sample stream.
ALS-Chemex collects the samples and transports them directly to the preparation laboratory in Hermosillo, Sonora. At the laboratory, part of each sample is reduced through crushing, splitting and pulverization from which 200 grams are sent to the ALS-Chemex assay laboratory in Vancouver. Thirty grams undergo fire assay for gold with the resulting concentrated button of material produced dissolved in acids and the gold content determined by atomic absorption. Another quantity of the sample is dissolved in four acids for an ICP multielement analysis.
To improve upon assay turnaround times, the company has contracted with the Hermosillo office of Bureau Veritas Laboratories to also provide assays in a timely fashion. Accordingly, the samples are now being collected by Bureau Veritas for direct transport to the preparation and assaying laboratory in Hermosillo, Sonora. At the laboratory, part of each sample is reduced through crushing, splitting and pulverization. About 200 grams are sent by BV to its Vancouver, B.C., laboratory and dissolved in aqua regia for multielement ICP analysis including silver. Thirty grams undergo fire assay in Hermosillo for gold by reducing the fire assay to a concentrated button of material that is dissolved in acids and the gold content determined by atomic absorption. No QA/QC issues were noted with the results received from either laboratory.
Geologic description
Cerro Caliche is located 45 kilometres east-southeast of Magdalena de Kino in the Cucurpe-Sonora Mega-district of Sonora, Mexico. Multiple historic underground mines were developed in the concession including Cabeza Blanca, Los Cuervos, Japoneses, Las Abejas, Boluditos, El Colorado, Veta de Oro and Espanola. Mineralization types of the Cucurpe-Sonora Mega-district include variants of epithermal low sulphidation veins and related mineralized dikes and associated volcanic domes. Local altered felsic dikes cut the mineralized meta-sedimentary rock units and may be associated with mineralization both in the dikes and meta-sedimentary rocks.
Host rocks include Jurassic-Cretaceous meta-sedimentary rock units including argillite, shale, quartzite, limestone, quartz pebble conglomerate and andesite. Younger intrusive rock consisting of medium coarse-grained granodiorite-granite is present in the westerly parts of the concessions near the historic Cabeza Blanca mine. It is apparent that veining cuts and pervasively alters the intrusive stock. Rhyolite occurs in irregular bodies distributed in higher elevations in the northerly part of the concession, including the Rincon area, where it occurs as flows, sills, dikes and rhyolite domes. Part of the rhyolite is mineralized and appears to be related to epithermal gold mineralization throughout the property.
Qualified person statement
Stephen Kenwood, PGeo, a director of Sonoro, is a qualified person within the context of National Instrument 43-101 (NI 43-101) and has read and approved this news release. Readers are cautioned that the presence of mineralization on historic mines adjacent to or on Cerro Caliche is not necessarily indicative of gold mineralization in the concessions held by the company.
About Sonoro Gold Corp.
Sonoro Gold is a publicly listed exploration and development company with a portfolio of exploration-stage precious metal properties in Sonora state, Mexico. The company has highly experienced operational and management teams with proven records for the discovery and development of natural resource deposits.
(1) NI 43-101 technical report on the Cerro Caliche property, July 26, 2019, D. Strickland, R.C. Sim, prepared for Sonoro Metals; comprising an inferred resource of 201,000 AuEq ounces at a grade of 0.55 g/t AuEq (0.495 g/t Au and 4.3 g/t Ag).
We seek Safe Harbor.
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