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Guatemala
Marlin Mine

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 Location:
24 km W from Huehuetenango, Guatemala

  Regional Office:
5 Avenida 5-55 Zona 14 Torre I Nivel 6 Of. 601
Guatemala City
Guatemala, Guatemala
01014
Phone  ...  Subscription required
Fax011/502-2329-2610
EmailEmail
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Filings & News

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Overview

StatusClosing / Closed
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Mechanized Cut & Fill
  • Longhole stoping
Processing
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Counter current decantation (CCD)
  • Merrill–Crowe
  • Cyanide (reagent)
Mine Life2017
The Company's closure of the Marlin mine at the end of May, 2017.


Owners

Source:
CompanyInterestOwnership
Newmont Corp. 100 % Indirect
Montana Exploradora de Guatemala, S.A. (operator) 100 % Direct

Deposit Type

  • Vein / narrow vein


Summary:

The deposit is classic low-sulfidation, quartz-calcite-adularia veins and stockwork host gold-silver mineralization in association with late-stage andesite dike swarms. The deposit is along a west-northwest striking normal fault on the eastern flank of the volcanic complex.


Mining Methods

  • Mechanized Cut & Fill
  • Longhole stoping


Summary:

Marlin has been in production since late 2005, operating as both an open pit and underground mine. Open pit operations ceased in early 2012 as the final, higher-grade portion of the open pit was mined, and the mine is now an underground operation only.

Underground operations employ mechanized cut-and-fill and long hole stoping mining, with underground loading equipment feeding haul trucks that transport the ore to the surface via ramps. Production from underground operations is now roughly 3,200 ore tonnes per day.


Crushing and Grinding


Processing

  • Gravity separation
  • Agitated tank (VAT) leaching
  • Counter current decantation (CCD)
  • Merrill–Crowe
  • Cyanide (reagent)

Source: Subscription required

Summary:

Ore is processed in a conventional crushing, grinding and milling circuit. Marlin also has a tailing storage facility, a waste rock storage area and various ancillary installations. Since 2012, a Filter Plant was commissioned to dry the tailings from the mill. The dry tailings are being used to backfill the pit.

Marlin’s cyanide circuit consists of a gravity concentrator and intensive cyanidation reactor, grinding thickener, pregnant solution storage tank, cyanide mixing tank, cyanide storage tank, process water storage tank, six leach tanks, five CCD tanks, cyanide recovery thickener and interconnection pipes. The ground ore is processed in tanks by an agitated leach in a cyanide solution. The resulting product is passed through a CCD system. Gold and silver are recovered from solution by a zinc precipitation/Merrill-Crowe system.

Recoveries & Grades:

CommodityParameter201620152014
Gold Recovery Rate, % 979797
Gold Head Grade, g/t 3.654.123.11
Silver Recovery Rate, % 969593
Silver Head Grade, g/t 184185126

Production:

CommodityUnits2016201520142013
Gold koz 115169186202
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Equivalent koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics2016201520142013
Tonnes milled 1,006 kt1,310 kt1,933,900 t1,941,900 t
Daily processing capacity 6,000 t
Daily milling rate 5,300 t5,320 t

Reserves at June 30, 2016:

CategoryTonnage CommodityGradeContained Metal
Proven 0.42 Mt Gold 4.08 g/t 0.05 M oz
Proven 0.42 Mt Silver 206.45 g/t 2.76 M oz
Probable 0.09 Mt Gold 4.18 g/t 0.01 M oz
Probable 0.09 Mt Silver 119.03 g/t 0.34 M oz
Proven & Probable 0.5 Mt Gold 4.1 g/t 0.07 M oz
Proven & Probable 0.5 Mt Silver 191.04 g/t 3.1 M oz
Measured 0.27 Mt Gold 4.51 g/t 0.04 M oz
Measured 0.27 Mt Silver 193.95 g/t 1.66 M oz
Indicated 0.2 Mt Gold 4.6 g/t 0.03 M oz
Indicated 0.2 Mt Silver 193.74 g/t 1.23 M oz
Measured & Indicated 0.46 Mt Gold 4.55 g/t 0.07 M oz
Measured & Indicated 0.46 Mt Silver 193.86 g/t 2.89 M oz
Inferred 0.04 Mt Gold 6.68 g/t 0.01 M oz
Inferred 0.04 Mt Silver 333.44 g/t 0.39 M oz

Commodity Production Costs:

CommodityUnits201620152014
Total cash costs Gold USD 977 / oz 611 / oz
Total cash costs Gold USD 803 / oz† 336 / oz†
All-in sustaining costs (AISC) Gold USD 986 / oz† 868 / oz† 862 / oz†
† Net of By-Product.

Operating Costs:

Units201620152014
UG mining costs ($/t mined) USD 109.1262.274
OP mining costs ($/t mined) USD
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20162015
Capital expenditures M USD 2   64  
Revenue M USD 242   312  
Operating Income M USD -124   -407  


Heavy Mobile Equipment:

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Corporate Filings & Presentations:

DocumentYear
Annual Report 2017
Annual Report 2016
Year-end Mineral Reserves 2016
Annual Report 2014
Year-end Mineral Reserves 2014
Project Description 2009
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Aerial view:

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