Digging Gold

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  • A pellet size of grain of rice can kill an avg. person.
  • One of the largest open-pit mines is the “Super Pit” Mine near the city of Kalgoorlie in Western Australia. On February 15, 2010, the Advanced Land Imager (ALI) on NASA’s Earth Observing-1 (EO-1) satellite captured this true-colour image of Super Pit and part of the neighbouring town of Kalgoorlie
  • Digging Gold

    1. 1. Digging GoldTimothy Kirschbaum Eman Sarsour Rajiv Mahay Doug Waara Tyler Blied
    2. 2. Background• Gold extracted using “Cyanide Heap Leaching” • Enables extraction of gold from low-grade ores• Problems with Cyanide
    3. 3. Clicker Question• Do you think in gold mining process , the benefit exceeds the environmental damage ?1. Yes2. No3. Maybe
    4. 4. Problems• Most Environmentally Destructive Industries• Cyanide Heap-Leaching (Most common technique)• Cyanide is one of the most potent poisons• Storing Cyanide in Reservoirs• Discharging of mining waste directly into waterways
    5. 5. http://eoimages.gsfc.nasa.gov/images/imagerecords/42000/42763/superpit_ali_2010045.jpg
    6. 6. Other ProblemsPOLLUTIONSMELTERING PROCESSACID MAIN DRAINAGE
    7. 7. POLLUTION•Consumptions offuel•Contribution toglobal warming
    8. 8. SmeltersProduces•(ACID RAIN)•Nitrogen•Sulfur•(TOXIC METELS)•Lead•Arsenic•Cadmium
    9. 9. ACID MINEDRAINAGEWhile the aciddrains from themine debris, itgradually picks upother metals , suchasarsenic, mercury, and lead. Whichresults a toxic brewthat can drain rightinto the waterways sierraclubgreatlakes.blogspot.comand groundwater.
    10. 10. Clicker Question• Do you think the United States should put more regulations and restrictions on gold mining ?1. Yes2. No3. I don’t care
    11. 11. Changes in Laws•to ban thecitizens cyanide Montana use of voted heap-leach mining in the state.•Montanaafterof mine in This was a one the largest in the U.S went out of business costing taxpayers 33 million.
    12. 12. What is Being Done• In 2005 Congress called for new laws to require mining companies to post adequate bonds. Which is sort of like insurance, incase they go bankrupt.
    13. 13. Clicker Question• Can we use technology to make gold mining profitable and safe ?1. Yes2. No3. Maybe
    14. 14. Efforts for Future PreventionGovernment Efforts• General Accounting Office• Stricter Environmental Laws (Mostly EU)• Heap-Leaching Banning Ex) Montana, Wisconsin
    15. 15. Efforts for Future PreventionEarthworks• “No Dirty Gold”• Jewelry Retailers Ex) Tiffany & Co., Cartier• Madison Dialogue

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