• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
United States
SEMO Operation

This page is not tailored to
devices with screen width under 750 px.
 Location:
9 km S from Viburnum, Missouri, United States

  Address:
P.O. Box 500
Viburnum
Missouri, United States
65566
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in United States
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Financials
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageProduction
Mine TypeUnderground
Commodities
  • Lead
  • Copper
  • Zinc
Mining Method
  • Room-and-pillar
Processing
  • Flotation
SEMO mining operation consists of Casteel, Buick, Brushy Creek, Fletcher, Sweetwater and No. 29 Mines.


Owners

 
CompanyInterestOwnership
The Doe Run Resources Corp. 100 % Direct

Deposit Type

  • Mississippi Valley Type


Summary:

Missouri has three world-class lead/zinc subdistricts (Old Lead Belt, Mine La Motte-Fredericktown, and Viburnum Trend) and several minor subdistricts that are in a region referred to as the Southeast Missouri Lead District. Arsenic, cadmium, cobalt, copper, lead, nickel, and zinc are the primary trace elements associated with the sulfide minerals of the Mississippi Valley Type ore deposits present in the district.

The MVT deposits of the Southeast Missouri Lead District are metal-sulfide deposits that are hosted in Paleozoic dolostone, limestone, and to a lesser extent sandstone. The primary metal-sulfide minerals of these deposits are pyrite–marcasite (FeS2), galena (PbS), and sphalerite (ZnS). In localized areas, mixed-metal sulfide minerals also occur in minor amounts. These include copper sulfide minerals such as bornite (Cu5FeS4), chalcopyrite (CuFeS2), and enargite (Cu3AsS4); nickel sulfide minerals such as millerite (NiS) and vaesite (NiS2); and iron sulfide minerals such as arsenopyrite (FeAsS) (Rakovan, 2007).


Mining Methods

  • Room-and-pillar


Summary:

SEMO’s mining operations take place up to 1,250 feet underground. The mines extract more than 20,000 tons of lead-bearing ore every day.

Millions of dollars worth of equipment operates underground, including hydraulic drills, trucks, loaders, charging rigs and scalers – all of which are disassembled to transport down the shaft and reassembled underground.

SEMO uses the room-and-pillar mining method, in which rock pillars (up to 35 feet wide and 120 feet tall) support the ground above.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

Primary recovery of lead, zinc, and copper bearing ores takes place after the mineral-containing ore has been crushed and hoisted by shaft to the surface Mill facilities. The ore is then ground to thesize of beach sand with a rod and ball mill.

There, the ground ore is fed into flotation tanks where tiny air bubbles are introduced. Added to the mixture are chemicals known as a reagents, which bonds to the tiny lead and copper minerals particles and lifts them to the surface where a bubbly froth forms. The froth is skimmed for final separation of the lead and copper minerals. Any remaining materials, such as zinc minerals and dolomite, sink to the bottom of the tank. The zinc minerals are separated from the dolomite in a similar fashion.

The wet minerals are concentrated in large tanks called thickeners. The concentrates are then dried with large vacuum filters that remove the majority of the moisture. Three different concentrates are produced, lead, zinc, and cop ........

CommodityParameter
Lead Concentrate Grade, %
Subscription required - Subscription is required.

Production:

CommodityUnits2017 *2016 *2015 *2014 *
Lead kt 227 *227227227
All production numbers are expressed as concentrate. * Average annual production reported in 2014

Operational Metrics:

Metrics2014
Daily ore mining rate 20,000 tons

Reserves at :


Financials:

Units201820172016
Capital expenditures M USD 46.9  21.4   24.2  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 28, 2021
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Press Release 2018
Project Description 2014
Press Release 2012
Press Release 2012
Other 2003
Subscription required - Subscription is required.

Aerial view:

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2020 MDO Data Online Inc.