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Very high gold and silver assay values were returned from samples of selected vein material, which were typically grab samples from local informal miners’ stockpiles and mine dumps. This style of sampling is helpful in highlighting the gold and silver potential of some oreshoots. A summary table with some of these results follows below. (Please see Map 1 for reference to the sampling areas.)
---------------------------------------------------------- |SAMPLE #|ZONE |WIDTH |Au (g/t)|Ag (g/t)| |--------------------------------------------------------| |40160 |La Union |Grab - Stockpile|22.8 |1901.0 | |--------------------------------------------------------| |40178 |El Zapotillo|Grab - Mine Dump|10.7 |1581.0 | |--------------------------------------------------------| |40194 |Los Cuervos |Grab - Mine Dump|0.13 |635.0 | |--------------------------------------------------------| |40326 |Los Gallos |0.60 |16.40 |262.0 | |--------------------------------------------------------| |40327 |Los Gallos |0.90 |5.10 |406.0 | |--------------------------------------------------------| |40329 |Los Gallos |Grab - Mine Dump|22.80 |1056.0 | ----------------------------------------------------------
Newly discovered and sampled vein and disseminated mineralization zones were found at the
------------------------------------------------------------------ |SAMPLE # |ZONE |WIDTH (m)|Au |Ag |Cu |Pb |Zn | | | | |(g/t)|(g/t)|(%) |(%) |(%) | |----------------------------------------------------------------| |40263 |El Zapotillo |0.65 |1.97 |3.3 |- -- -- | |----------------------------------------------------------------| |40278 |El Zapotillo |1.10 |0.31 |119.0|- -- -- | |----------------------------------------------------------------| |40308 |El Carrizo |1.50 |0.11 |3.7 |- -- -- | |----------------------------------------------------------------| |40325 |Las Palomas |0.90 |0.54 |93.1 |- -- -- | |----------------------------------------------------------------| |40330 |Las Palomas |0.60 |0.82 |110.2|- -- -- | |----------------------------------------------------------------| |40193 |El Troze |1.80 |0.49 |23.1 |- -- -- | |----------------------------------------------------------------| |40255 |Arroyo El |0.40 |0.25 |246.0|1.05|- -- | | |Jocuixtle | | | | | | | |----------------------------------------------------------------| |40259 |Arroyo El |1.40 |1.20 |88.9 |0.21|- -- | | |Jocuixtle | | | | | | | |----------------------------------------------------------------| |40322 |Arroyo El |Grab - |- |44.4 |- -- -- | | |Jocuixtle |Float | | | | | | |----------------------------------------------------------------| |40284 |Los Cuervos |1.50 |0.11 |208.0|0.33|- -- | |----------------------------------------------------------------| |40288 |Los Cuervos |1.50 |- |38.4 |0.60|0.10|0.78| |----------------------------------------------------------------| |40289 |Los Cuervos |1.00 |- |112.3|1.24|0.13|0.31| |----------------------------------------------------------------| |40203-40205|La Planta |5.30 |- |19.0 |0.60|1.14|2.13| |----------------------------------------------------------------| |40206-40217|La Planta |18.20 |- |17.9 |0.24|0.66|1.42| |----------------------------------------------------------------| |40218-40221|La Planta |6.00 |- |22.6 |0.11|0.58|0.48| |----------------------------------------------------------------| |40222-40226|La Planta |6.60 |- |19.4 |- |0.44|0.40| |----------------------------------------------------------------| |40229-40232|La Planta |5.80 |- |21.8 |0.36|0.90|0.88| |----------------------------------------------------------------| |40236 |Arroyo del Tiro|0.80 |- |22.5 |- -- -- | |----------------------------------------------------------------| |40237 |Arroyo del Tiro|1.50 |- |22.5 |- -- -- | |----------------------------------------------------------------| |40247 |Potrero |1.50 |- |26.3 |- -- -- | | |de Don | | | | | | | | |Teo. | | | | | | | ------------------------------------------------------------------
Most of these new zones are extensions of previously mapped and sampled showings, and help to connect individual zones into much larger targets. A significant discovery this year were wider zones of disseminated base metal-rich mineralization at the La Planta and Los Cuervos Zones. These may provide bulk tonnage targets, with strongly mineralized silver-lead-zinc-copper zones sampled up to 18.2 metres in width at the La Planta. Exposure is often limited, so the true potential of these zones will only be properly tested by drilling.
Fieldwork to date in 2021 has focused on defining the extents of the property-wide Las Cucharas precious metal system, which has been traced over 6 kilometres in strike length. New mineralized zones and splays of the vein system have been discovered and defined in intermediate locations between known showings and past producing small-scale mines. Two new base-metal rich zones have been discovered at the La Planta and the
Terreno geologists believe that the project hosts two distinct styles of mineralization with a continuous transition between them. These are:
1.)Discrete, gold and silver rich low-sulfidation epithermal style quartz veins, which form lenses, oreshoots, breccias, and stockworks controlled by the main NW trending regional structures. Historic underground production areas such as the
La Union Zone represent this style of mineralization. It is important to note that production from these workings was limited more by the level of the water table than by a lack of mineralization.
2.)Base-metal rich polymetallic vein and disseminated lead-zinc-copper-silver zones. This style of mineralization outcrops in the La Planta,
Los Cuervos , La Taverna, and La Raizura Zones. This style of target has the potential for considerably more tonnage, with broadly disseminated lead, zinc, and/or copper sulfides in alteration zone halos around the vein structures. Polymetallic mineralization typically occurs below precious metal-rich zones, lower in the hydrothermal system. A compelling example of this type of deposit is theSan Acacio Project of Defiance Silver Corporation in nearbyZacatecas state. Recent deeper drilling below historically mined areas has discovered significant lead-zinc-silver mineralization.
Over the next few months, Terreno staff will focus on updating the geological and geochemical databases, interpreting results, and planning for a drill program later this year, subject to financing. Terreno management is very pleased with this years’ exploration results and look forward to further advancing the
It is located in the southern extreme of the mid-Tertiary Sierra Madre Occidental (SMO) volcanic belt, which is a prolific mining terrain host to many world-class multi-million ounce gold and silver deposits. Some examples include the
Mr.
Quality Control and Assays
Rock samples were collected using industry standard documentation including sample location, type, width, and description. Samples were delivered to
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Map 1.Concession map of the
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Map 2. Location of
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