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Argentina
Martha Mine

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 Location:
40 km NE from Gobernador Gregores, Argentina

  Address:
Paraná 275 Dpto 6
Buenos Aires
Argentina
Phone  ...  Subscription required
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit / Underground
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
  • Shrinkage stoping
  • Longhole stoping
Processing
  • Flotation
Latest NewsPatagonia Gold 2019 Financial Results and Update on Extension to File Q1 2020 Financial Statements and MD&A     June 15, 2020


Owners

 
CompanyInterestOwnership
Patagonia Gold Plc. 100 % Indirect

Deposit Type

  • Breccia pipe / Stockwork


Summary:

Silver and gold mineralization at Martha is hosted in Jurassic-aged felsic volcanic rocks of the Chon Aike Formation of the Bahia Laura volcanic complex (BLVC). Host rocks are relatively shallowly dipping ignimbrites, locally inter-bedded with thin sections of sedimentary strata.

The oldest geological unit in the Martha area is a crystal rich, dacitic ignimbrite, which is overlain by a thin, tuffaceous unit. Further up in the Chon Aike sequence rocks change to crystal rich, rhyolitic ignimbrite followed again by a thin layer of tuffaceous sediments. The upper part of the sequence at Martha is comprised of lithic rich, rhyodacitic ignimbrite related to a caldera-forming, volcanic event.

Most of the historic mineral deposits were hosted in the crystal rich ignimbrites and tuffaceous units although, locally, upper lithic fragment tuffs and ignimbrites can host high-grades of vein-hosted silver and gold. An example of the latter is the mineralization in the Betty deposit at Martha.

Martha mineralization is epithermal, intermediate sulfidation in style, hosted in quartz veins, veinlets and vein breccias cutting the margins of the Jurassic-aged caldera. Vein widths vary significantly on surface from a few centimeters up to several meters. Banded textures are common in the wider veins. Adularia is a common gangue mineral in the quartz veins.


Mining Methods

  • Truck & Shovel / Loader
  • Shrinkage stoping
  • Longhole stoping


Summary:

There are no mining activities underway at Martha at this time. Prior mining methods used were a combination of small surface pits and slot cuts and underground mining.

Underground mining methods consisted of drifting and shrinkage and long-hole stoping. Hunt is planning to evaluate opportunities for new mining involving a combination of similar surface and underground methods.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

There are no metal recovery operations underway at Martha at the present time. The property contains a dormant crushing, grinding and flotation plant – nominally rated at 480 tonnes per day (tpd) – which is being cleaned and repaired as necessary to potential future operations.

Since Hunt is considering evaluating areas within the historic Martha mine area, which provided most of the feed to the Martha mill, the Qualified Person believes there is reasonable expectation of satisfactory metallurgical performance from the new material to be evaluated.


Production:

CommodityUnits20192018
Gold oz  ......  Subscription required  ......  Subscription required
Silver oz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2019
Annual processing capacity  ......  Subscription required
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Reserves at December 31, 2012:

CategoryTonnage CommodityGrade
Indicated 52,000 t Gold 0.58 g/t
Indicated 52,000 t Silver 465 g/t
Inferred 185,000 t Gold 163 g/t
Inferred 185,000 t Silver 0.17 g/t

Financials:

Units2019
Revenue M USD  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required
After-tax Income M USD  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 26, 2020
....................... Subscription required ....................... Subscription required Subscription required Mar 10, 2020
....................... Subscription required ....................... Subscription required Subscription required Mar 26, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2016
Technical Report 2016
Subscription required - Subscription is required.

News:

NewsDate
Patagonia Gold 2019 Financial Results and Update on Extension to File Q1 2020 Financial Statements and MD&A June 15, 2020
Hunt Mining 2018 Production Summary From Martha Project January 16, 2019
HUNT MINING INITIATES PRODUCTION AT THE MARTHA PROJECT January 17, 2017

Aerial view:

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