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Geoenvironmental Impacts of Mercury and Arsenic

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Deliverables:

Sierra Nevada Foothills Arsenic and Mercury

• presentation of mercury and methylmercury in mine drainages in low sulfide gold deposits of the Sierra Nevada foothills, CA, at 5Th International Conference Mercury as a Global Pollutant (Ashley, R.A.)
• submit paper on mercury and methylmercury in mine drainages in low sulfide gold deposits, Sierra Nevada foothills, CA, for 5Th International Conference Mercury as a Global Pollutant (Ashley, R.A.)

CA Coast Range Mercury Mineral Belt

• presentation of mercury and methylmercury in mine drainages in the CA mercury mineral belt, USA, at 5Th International Conference Mercury as a Global Pollutant (Rytuba, J. J.)
• Rytuba, J.J., submit paper on mercury and methylmercury in mine drainages in the CA mercury mineral belt, for 5Th International Conference Mercury as a Global Pollutant (Rytuba, J. J.)
• presentation of characterization and speciation of mercury-bearing mine wastes using X-ray absorption spectroscopy (XAS) at 5Th International Conference Mercury as a Global Pollutant (Kim, C. S., Brown, G. E., Jr., and Rytuba, J. J.)
• submit paper on characterization and speciation of mercury-bearing mine wastes using X-ray absorption spectroscopy (XAS) at 5Th International Conference Mercury as a Global Pollutant (Kim, C. S., Brown, G. E., Jr., and Rytuba, J. J.)
• publish proceedings of the fourth annual mercury discussion group, CA: USGS Open-File Rept. (Rytuba, J. J., Kim, C., VanVelsor, K,)
• presentation on speciation and bioavailability of mercury in mercury mine wastes at GSA 100th Cordilleran Section symposium on environmental effects of mercury in northern CA (Rytuba, J. J., Kim, C.)
• prepare field trip guide to mercury deposits of the Knoxville and Sulphur Creek districts for GSA 100th Cordilleran Section Meeting, Berkeley, CA (Rytuba, J. J. Enderlin, D., and Krause, R.)

Arsenic in the Fortymile Mining District, AK

• Publication emphasizing As transport mechanisms, processes, and pathways (R. Wanty and B. Wang).
• Publication on the use of our data in assisting the land management risk assessment process (B. Gamble, E. Bailey, and L. Gough).

Environmental impacts of mercury in the southwest AK mineral belt

• Characterization of the environmental effects of abandoned mercury mines in southwestern Alaska, USA [abs.]: 5th International Conference on Mercury as a Global Pollutant, Rio de Janeiro, Brazil, May 23-27, 1999 (Gray, J.E., Theodorakos, P.M., and Bailey, E.A)
• Mercury biogeochemistry in soils near abandoned mercury mines in southwestern Alaska, USA [abs]: 5th International Conference on Mercury as a Global Pollutant, Rio de Janeiro, Brazil, May 23-27, 1999. (Bailey, E.A., Hines, M.E., and Gray, J.E.)
• Distribution, variability, speciation, and environmental effects of mercury downstream from abandoned mercury mines in southwestern Alaska, USA: Water, Air, and Soil Pollution, Proceedings volume of the 5th International Conference on Mercury as a Global Pollutant, Rio de Janeiro, Brazil, May 23-27, 1999. (Gray, J.E., Theodorakos, P.M., and Bailey, E.A.)
• The biogeochemistry of mercury in soils near inactive mercury mines in southwest Alaska, USA: Water, Air, and Soil Pollution, Proceedings volume of the 5th International Conference on Mercury as a Global Pollutant, Rio de Janeiro, Brazil, May 23-27, 1999. (Bailey, E.A., Hines, M.E., and Gray, J.E.)

Arsenic in surface and ground waters, Fairbanks, Alaska

• Publication on Pb isotopes in natural waters in Fairbanks in the 1998 AK Accomplishments volume (L. Farmer and R. Goldfarb)

Imaging spectroscopy CA Coast Range Mercury Mineral Belt

• Publication of preliminary map of the Cache Creek Basin mercury sources and contamination effects from AVIRIS data-USGS-O-File (King)
• Publication of preliminary map of the Knoxville-Mayacamas Hg sources: effects on drainage basins from AVIRIS data USGS-O-File (King)

USGS Mercury research publication

• USGS Prof. Paper summarizing ongoing USGS mercury research.

Sources and cycling of Hg in Lakes and Reservoirs of the Western USA

• USGS Open-file Report of Hg speciation data (Gray)
• Oral presentation of results at a national or international conference (Gray)

Imaging Spectroscopy of Mine Waste in the Mother Load District

• Spectral mineral maps of selected areas. Preliminary thematic maps of pH and metal mobility (Swayze)

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