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Goldstrike Mine

Logan B

Sofia S

Hailee B

Mine Info:

Mine

Information

  • Name: Goldstrike Mine

- largest gold mine in North America

  • Place: Eureka County, Nevada
  • Owned: by Barrick Gold

- world's largest gold mining company

  • Produces: gold & silver
  • It has: open-pit & underground mines
  • Area: 6870 acres

History:

History:

  • Gold: found in 1962
  • Gold: first mined in 1975
  • Small mining setup: in 1978
  • Barrick gained ownership: in 1986
  • Mining: began in 1987

Environmental Regulations:

Environmental Regulations

  • Dealing w/ Waste Products:

- Tailings Disposal: 2 engineered facilities

- Largest Gold Deposit: Betze-Post in Carlin Trend

(open-pit zone w/ 5 generations of formed pyrite mineralisation)

Agencies:

- Nevada Division of Environmental Protection

- Nevada Division of Water Resources

- Bureau of Land Management/U.S. Forest

- (BMRR) Bureau of Servie Mining Regulation & Reclamation

-- 3 Branches:

Regulation & Closure: Water Pollution Control Permit

Reclamation: Reclamation Permit (construction of mining activity)

- Nevada Bureau of Air Pollution Control:

Regulations:

Policies/Permits:

- Water Pollution Control Permit

- Reclamation Permit

- Air Pollution Control

- Underground Injection Control

- Jurisdictional Dam Permit

- Nevada Mercury Control Program (if there's potential to emit mercury)

Issues:

Issues:

  • Company signed agreement w/ Nevada & US Environmental Protection Agency (EPA):

- pay penalty: release of hazardous waste (releases of mercury)

- payed $600,000

--Newmont: $395,000

-- Goldstrike: $196,000

- Goldstrike: doesn't admit to any offense

Extraction Process:

  • Truck & Shovel / Loader
  • Drift & Fill
  • Longhole stopping
  • Transverse stoping
  • Longitudinal stoping
  • Cemented Brick

Extraction Process

Chemicals Used / Reactions:

  • Sulfuric Acid (reagent)
  • Calcining
  • Agitated tank (VAT) Leaching
  • Pressure Oxidation
  • Resin in Leach (CIL)
  • Carbon adsorption-desorption-recovery (ADR)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
  • Thiosulfate (reagent)
  • Roasting

Chemicals Used:

  • Results: in ion-solutions

Potential Environmental Impacts:

Potential Environmental Impacts

  • Air Quality:

- Mercury particles: relased into the air & travel up to neighbouring states

  • Groundwater:

- Water: pumped from the mine & aquifers, can be infused with mercury

  • Water:

- Mercury: relased into water due to groundwater & air pollution

  • Soil Chemistry & Contamination:

- Mercury in soil: can lead to issues for surrounding areas, polluting soil

  • Aquatic Enviroments:

- Polluted waters: distroy vital enviroments & slow down flow of streams

  • Aquatic Life:

- Mercury: gets into the water - gets ingested by fish - can be ingested by humans & other animals

  • Plant & Animals Species:

- Soil: affected by mercury - causes issues for plants & forest (killing them & weakening soil)

- Animals: ingest any mercury in water/air - have high risk of dying

Let's Fix it:

Let's

Fix it!

  • A way to help prevent the enviroment from the impacts would be:

- find safer, cleaner ways dispose of groundwater from the mines

- find a new method of mining so mercury isn't used as much as it is

Works Cited:

Works Cited:

  • https://en.wikipedia.org/wiki/Goldstrike_minehttps://
  • https://www.barrick.com/English/operations/nevada-gold-mines/default.aspx
  • https://miningdataonline.com/property/372/Goldstrike-Operation.aspx
  • https://earthobservatory.nasa.gov/images/90827/going-for-gold-in-nevada#:~:text=One%20of%20the%20key%20issues%20facing%20mines%20is,water%20table%20below%20the%20level%20of%20the%20pit.
  • https://pubmed.ncbi.nlm.nih.gov/24943890/#:~:text=From%20artisanal%20gold%20mining%2C%20mercury%20is%20released%20to,and%20tailings%20%288%2C900%20%CE%BCg%20kg%20%28-1%29%29%2C%20as%20expected.
  • https://www.hcn.org/issues/15/457
  • https://www.brilliantearth.com/gold-mining-environment://earthworks.org/releases/epa_cites_gold_mines_as_largest_source_of_toxic_mercury_air_emissions_in_ne/
  • https://miningdataonline.com/property/372/Goldstrike-Operation.aspx
  • https://westernmininghistory.com/mine-detail/10173988/
  • https://www.sec.gov/Archives/edgar/data/756894/000119312512137672/d325652dex991.htm
  • https://ndep.nv.gov/land/mining
  • https://www.nvbar.org/wp-content/uploads/NevLawyer_April_2013_Environmental_Regulation.pdf
  • https://cyanidecode.org/wp-content/uploads/2021/04/GoldstrikeSummAuditForm07.pdf
  • https://www.mining-technology.com/projects/betze-post-gold-mine-nevada/
  • https://www.miningnewsfeed.com/reports/Goldstrike_Technical_Report_03222019.pdf
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