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Sonoro Gold Corp
Symbol SGO
Shares Issued 102,593,593
Close 2021-08-30 C$ 0.305
Market Cap C$ 31,291,046
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Sonoro Gold samples up to 14.3 g/t Au at Cerro Caliche

2021-08-30 09:16 ET - News Release

Mr. Kenneth MacLeod reports

SONORO REPORTS SURFACE SAMPLING EXPOSED MULTIPLE VEIN WINDOWS OVER 750 METER EXTENSION TO BUENA SUERTE AND EL COLORADO ZONES

Sonoro Gold Corp. has released additional assay results from the continuing surface sampling program at the company's Cerro Caliche gold project in Sonora state, Mexico. A total of 275 new samples were assayed, bringing the total for the current sampling program to 1,567 samples over four mineralized corridors as described in the company's news release dated July 20, 2021.

The new results further confirmed material extensions of up to 750 metres over two southern linear structural corridors at the Buena Suerte and El Colorado zones. The sampling results also revealed oxide gold-mineralized windows among the two southern structural corridors. The windows were accessed by recently built road cuts and drill site excavations and future sampling will investigate potential continuation and extensions.

Surface rock samples were collected from several well-defined vein and gold-mineralized structures by channel sampling perpendicular across measured veins and wall rocks with sample lengths ranging from 0.4 metre to 2.0 metres. Assay results from 17 samples returned grades between 2.5 grams per tonne gold and 14.3 grams per tonne gold. There are five high-priority window targets for the coming drilling program as each demonstrated strong stockwork quartz veining and outlined broad zones of gold and silver mineralization.

Analysis of approximately 284 surface samples collected during the current program from the El Colorado/La Ventana and Buena Suerte/San Quintin corridors confirm the southern extensions of the vein trends with numerous parallel sheeted veins and quartz veinlet stockwork. All samples were given equal weighting.

Sample highlights from the El Colorado/La Ventana corridor:

  • Window A, approximately 100 metres by 130 metres along strike, with 39 samples averaging 0.36 gram per tonne gold and 0.6 gram of silver, including one sample grading 8.6 grams per tonne gold;
  • Window B, approximately 300 metres by 280 metres along strike, with 39 samples averaging 0.63 gram per tonne gold and 4.8 grams per tonne silver, including one sample grading 4.9 grams per tonne gold over one metre and another sample grading 3.7 grams per tonne gold over 1.2 metres;
  • Window C, approximately 300 metres by 50 metres oriented northeast perpendicular to the northwest-oriented regional vein trends, with 51 samples averaging 0.76 gram per tonne gold and 1.9 grams per tonne silver.

Sample highlights from the Buena Suerte/San Quintin corridor:

  • Window D, a teardrop-shaped area at the Buena Suerte vein zone extension, covering 350 metres in length by a width ranging from 40 metres to 80 metres, with 61 samples averaging 0.65 gram per tonne gold and 18.5 grams per tonne silver;
  • Window E, approximately 220 metres by 100 metres along strike, with 94 samples averaging 0.28 gram per tonne gold and 1.3 grams per tonne silver, including one sample grading 2.7 grams per tonne gold.

Outside of the targeted windows, sample assays from a vein considered to be the hangingwall of the Cabeza Blanca vein (located between windows B and D), returned 1.2 metres averaging 10.8 grams per tonne gold. This vein is hosted in the rhyolitic intrusive rock and is mostly soil covered. Almost one kilometre to the east of window D, sample assays from a one-metre vein located near the Cuervos vein returned 7.5 grams per tonne gold.

Rock types hosting veining in the southern corridor are mainly a rhyolite subvolcanic unit and a metaquartzite shale unit with lesser biotite granodiorite. Alteration is predominantly silicification associated with quartz veinlets and sericite with gold-silver mineralization cutting these rock types.

The remaining samples were collected from more widespread areas to the northeast and east of the southern extensions (outside of the map area). Samples results from this region are generally encouraging and the eastern La Espanola corridor is another priority target for the company. Mapping and sampling are currently under way at La Espanola to quantify the size of the exposed vein. Four prior drill holes intersected the vein, including previously announced scout hole SCR-068, which was drilled in 2019 and which intercepted 6.179 grams per tonne gold equivalent over 3.05 metres and 1.327 grams per tonne gold equivalent over 9.14 metres.

Stockpiled vein material at the La Espanola mine surface is noteworthy for its distinct multiple bands with greenish quartz, while dikes of rhyolitic composition are common within the ridge that hosts the vein, which cuts both the rhyolitic unit and quartzite.

Mel Herdrick, Sonoro's vice-president of exploration, noted, "With this latest round of mapping/sampling information, new priority drill targets have been identified, increasing management's confidence the next drilling campaign may extend gold mineralization to the south."

Kenneth MacLeod, Sonoro's president and chief executive officer, added, "With the continuing success of the surface sampling program in areas that had not been previously explored, we are confident that mineralization at Cerro Caliche will continue to expand with the reverse circulation drill program scheduled to restart in the fall."

John Darch, Sonoro's chairman, commented: "These newly identified oxide-gold-mineralized windows are essential to our fall drilling campaign to expand mineralization at Cerro Caliche. The presence of strong stockwork quartz veining and broad zones of gold and silver mineralization in all five windows confirm that these will be our high-priority targets. We are particularly encouraged with the number of high-grade samples results as we continue to investigate the potential for near-surface higher-grade mineralization. Confirmation of high-grade mineralization could potentially improve the economics of our proposed open-pit heap leach mining operation in the initial years of mining."

As previously announced, drilling activities on the concession have been paused since April, 2021, to provide the exploration team sufficient time to ensure all data and assistance were available for the completion of a preliminary economic assessment (PEA) anticipated to be completed in the fall. The company has engaged Micon International Ltd. to prepare an updated resource estimation for inclusion in the PEA being prepared by DENM Engineering Ltd.

Quality assurance/quality control measures and analytical procedures

Samples are collected as continuous chip samples by hand into plastic bags; GPS (Global Positioning System) positions and rock descriptions are noted; and the bags are numbered using Bureau Veritas (BV) bar code number books and then sealed and taken to secure storage in Cucurpe village near the project.

Company personnel transport those bagged samples directly to the BV preparation laboratory in Hermosillo, Sonora. At the preparation laboratory samples are logged into the BV system using bar code labels, opened and then reduced in size through crushing, splitting and pulverization. Thirty grams of each pulverized sample are split apart in that laboratory and undergo a fire assay for gold content by reducing the fire assay to a concentrated button of material that is dissolved in acids, and, from the solution, the gold content is determined by atomic absorption. About 200 grams of each sample are sent by BV to its Vancouver, Canada, laboratory, where samples are individually dissolved in aqua regia for multielement ICP analysis, including silver. Quality control standards were inserted in the sample lineup by the BV Vancouver laboratory.

No quality assurance/quality control issues were noted with the results received from the laboratory.

Geologic description

Cerro Caliche is located 45 kilometres east southeast of Magdalena de Kino in the Cucurpe-Sonora megadistrict of Sonora, Mexico. Multiple historic small underground gambusino gold 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 megadistrict include variants of epithermal low-sulphidation veins and related mineralized dikes and associated volcanic domes. Local altered and mineralized felsic dikes cut the mineralized metasedimentary rock units and may be associated with mineralization both in the dikes and metasedimentary rocks.

Qualified person statement

Stephen Kenwood, PGeo, a director of Sonoro, is a qualified person within the context of National Instrument 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 economic gold mineralization in the concessions held by the company.

About Sonoro Gold Corp.

Sonoro Gold is a publicly listed exploration and development company holding the near-development-stage Cerro Caliche project and the exploration-stage San Marcial 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.

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