Mining Intelligence and News

Santa Gertrudis Project

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Mine TypeOpen Pit
 Archived Information
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotSanta Gertrudis is an advanced exploration stage Project. Agnico Eagle acquired its 100% interest in the Santa Gertrudis gold property in November 2017 and does not recognize the results of PEA 2014.

The Santa Gertrudis property was the site of an historic heap leach operation that produced approximately 565,000 ounces of gold at a grade of 2.1 g/t gold from 1991 to 2000. Substantial surface infrastructure is already in place on the property including pre-stripped pits, haul roads, water sources and buildings.

The Company is currently evaluating a potential production scenario at Santa Gertrudis that utilizes a heap leach for lower-grade mineralization and a small mill facility to process higher-grade ore. The Company believes that the Santa Gertrudis project has the potential to be a similar size operation to La India.

In 2023 on the Santa Gertrudis were exploration activities.


Agnico Eagle Mines Ltd. 100 % Indirect
In November 2017, the Agnico Eagle acquired its 100% interest in the Santa Gertrudis property.



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Deposit type

  • Carlin-type
  • Stratabound
  • Replacement


Historic production for the Santa Teresa mining district was principally from sedimentary-rockhosted gold deposits that have been characterized by some authorities as “Carlin-type” in character.

Northern Sonora has three northwest-trending mineralization corridors, which each have distinctive regional geological features. Santa Gertrudis covers a potential strike length of 25 km of the favourable Cretaceous-age intra-caldera sedimentary belt.

Three corridors with favourable geological formations have been identified on the property, with a potential strike length of 18 km. Within the corridors there are nine mineralized zones with multiple deposits; the mineralized deposits form trends that are hosted mainly by units within the sedimentary Morita, Mural and Cintura formations. Limited drilling has been completed between the deposits.

There appear to be three types of gold-silver mineralization (oxide, transitional and sulphide) at Santa Gertrudis. There is stratabound replacement mineralization in calcareous siltstone or on the margins of limestone. In addition, the Company's prospecting has identified high-grade mineralization along northeast-striking fractures that crosscut the stratigraphy and that appear to be important mineralization conduits.

Amelia is one of three deposits that comprise the Trinidad Trend and is the site of a previously operating open-pit gold mine. High-grade gold mineralization can be found in multiple parallel structures that commonly correspond to lithological contacts. The Amelia deposit strikes east-west for a length of approximately 900 metres and dips steeply to the north. Most of the open pit (oxide) material lies between surface and 140 metres depth, while the underground mineral resource below the open-pit mineral resource has been extended to a depth of approximately 700 metres.

The Espiritu Santo zone, discovered in 2019 at a location 500 metres east-southeast of Amelia, includes high-grade gold and silver mineralized structures at shallow depth.



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Mining Methods


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Crushers and Mills


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CommodityUnitsAvg. AnnualLOM
Gold oz 56,000671,300
All production numbers are expressed as metal in doré.

Production Costs

Cash costs Gold USD 622 / oz *  USD
Total cash costs Gold USD 629 / oz *  USD
All-in sustaining costs (AISC) Gold USD 699 / oz *  USD
Assumed price Gold USD 1,250 / oz *  USD
* According to 2014 study / presentation.

Operating Costs

OP mining costs ($/t mined) USD 1.54 *  USD
OP mining costs ($/t milled) USD  ....  Subscribe
Processing costs ($/t milled) USD  ....  Subscribe
G&A ($/t milled) USD  ....  Subscribe
Total operating costs ($/t milled) USD  ....  Subscribe
* According to 2014 study.

Project Costs

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscribe
Sustaining CapEx $M USD  ......  Subscribe
Total CapEx $M USD  ......  Subscribe
OP OpEx $M USD  ......  Subscribe
Processing OpEx $M USD 105
G&A costs $M USD 21
Total OpEx $M USD  ......  Subscribe
Total Taxes $M USD  ......  Subscribe
Gross revenue (LOM) $M USD  ......  Subscribe
Pre-tax Cash Flow (LOM) $M USD  ......  Subscribe
After-tax Cash Flow (LOM) $M USD  ......  Subscribe
Pre-tax NPV @ 0% $M USD  ......  Subscribe
Pre-tax NPV @ 5% $M USD  ......  Subscribe
Pre-tax NPV @ 7% $M USD  ......  Subscribe
After-tax NPV @ 0% $M USD  ......  Subscribe
After-tax NPV @ 5% $M USD  ......  Subscribe
After-tax NPV @ 7% $M USD  ......  Subscribe
Pre-tax IRR, %  ......  Subscribe
After-tax IRR, %  ......  Subscribe
After-tax payback period, years  ......  Subscribe

Heavy Mobile Equipment

Fleet data has not been reported.


Mine Management

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ........... Subscription required ........... Subscription required Subscription required Apr 20, 2024
....................... Subscription required ....................... Subscription required Subscription required Apr 16, 2024


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