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United States
Middle Tennessee Complex

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 Location:
2 km N from Gordonsville, Tennessee, United States

  Address:
(P.O. Box 188)120 Zinc Mine Circle
Gordonsville
Tennessee, United States
38563
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Fax+1 615 683 6568
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
Mining Method
  • Longhole stoping
  • Room-and-pillar
Processing
  • Filter press plant
  • Dewatering
  • Flotation
  • Dense media separation
Mine Life20 years (as of Jan 1, 2021)
Middle Tennessee is comprised of two underground zinc mines; Gordonsville and Cumberland, and a processing plant located at the Gordonsville mine site.

In July 2019, Nyrstar’s operating business became majority owned by Trafigura. Production numbers have not been publicly available since then.


Owners

Source:
CompanyInterestOwnership
Trafigura Group Pte Ltd. 100 % Indirect
On 31 July 2019, Trafigura Group Pte Ltd. (“Trafigura”), a market leader in the global commodities industry, become the majority owner of the operating business of Nyrstar, a global multi-metals business.

Deposit Type

  • Mississippi Valley Type


Summary:

Middle Tennessee Mines is comprised of three operating mines: Gordonsville, Elmwood, and Cumberland and one project, Stonewall, which are located approximately 80 kilometres east of Nashville, Tennessee. Zinc mineralisation occurs in Mississippi Valley Type (‘MVT’) deposits as open-space fillings of breccias and fractures within limestones and dolomites. In MTM, the zinc mineralisation contains recoverable amounts of germanium and gallium.


Mining Methods

  • Longhole stoping
  • Room-and-pillar


Summary:

The main mining method: Room-and-pillar.
MTN has successfully implemented longhole stoping as an additional mining method in three operations.


Crushing and Grinding


Processing

  • Filter press plant
  • Dewatering
  • Flotation
  • Dense media separation

Flow Sheet: Subscription required

Summary:

The Middle Tennessee zinc mine complex has a history of close association with Nyrstar’s Clarksville smelter, which was originally constructed to treat zinc concentrate from the mines. Ore mined at the three mines is processed into zinc concentrate at the Gordonsville zinc mine complex.

Along with zinc concentrate, Middle Tennessee delivers recoverable amounts of germanium and gallium as by-products to the Clarksville smelter.

The main operations associated with the process plant are:
Primary Crushing
Secondary Crushing
Heavy Media Separator
Rod/Ball Mill
Flotation
Thickener/Filter
Tailings.

Recoveries & Grades:

CommodityParameter2018201720152014
Zinc Recovery Rate, % 94.392.898.195.5
Zinc Head Grade, % 2.973.113.253.19

Production:

CommodityProductUnits20182017201520142013
Zinc Metal in concentrate kt 3922474750
Zinc Concentrate kt 6034747479
Subscription required - Subscription is required.

Operational Metrics:

Metrics20182017201520142013
Tonnes milled 1,389 kt of ore769 kt of ore1,482 kt of ore1,555 kt of ore1,648 kt of ore

Reserves at December 31, 2018:
A cut-off grade of 2.0% Zn has been applied in the estimation of Mineral Resources for all mines

CategoryTonnage CommodityGrade
Proven 0.16 Mt Zinc 4.5 %
Probable 2.19 Mt Zinc 3.3 %
Proven & Probable 2.35 Mt Zinc 3.4 %
Measured 0.18 Mt Zinc 4.7 %
Indicated 3.67 Mt Zinc 3.4 %
Measured & Indicated 3.86 Mt Zinc 3.5 %
Inferred 16.01 Mt Zinc 3.5 %

Operating Costs:

Units20182017
Direct operating costs ($/t milled) USD 6560


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 13, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2020
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
Annual Report 2018
Fact Sheet 2018
Press Release 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Fact Sheet 2017
Year-end Mineral Reserves 2017
Year-end Mineral Reserves 2016
Annual Report 2015
Year-end Mineral Reserves 2015
Annual Report 2014
Year-end Mineral Reserves 2014
Corporate Presentation 2010
Other 1993
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