Acid rock drainage (ARD) and disposal of tailings that result from mining activities impact coastal areas in many countries. The dispersion of metals from mine sites that are both proximal and distal to the shoreline can be examined using a pathways approach in which physical and chemical processes guide metal transport in the continuum from sources (sulfide minerals) to bioreceptors (marine biota). Large amounts of metals can be physically transported to the coastal environment by intentional or accidental release of sulfide-bearing mine tailings. Oxidation of sulfide minerals results in elevated dissolved metal concentrations in surface waters on land (producing ARD) and in pore waters of submarine tailings. Changes in pH, adsorption by insoluble secondary minerals (e.g., Fe oxyhydroxides), and precipitation of soluble salts (e.g., sulfates) affect dissolved metal fluxes. Evidence for bioaccumulation includes anomalous metal concentrations in bivalves and reef corals, and overlapping Pb isotope ratios for sulfides, shellfish, and seaweed in contaminated environments. Although bioavailability and potential toxicity are, to a large extent, functions of metal speciation, specific uptake pathways, such as adsorption from solution and ingestion of particles, also play important roles. Recent emphasis on broader ecological impacts has led to complementary methodologies involving laboratory toxicity tests and field studies of species richness and diversity.

Koski, R.A. 2012. Metal dispersion resulting from mining activities in coastal environments: A pathways approach. Oceanography 25(2):170–183, https://doi.org/10.5670/oceanog.2012.53.

Achterberg, E.P., V.M.C. Herzl, C.B. Braungardt, and G.E. Millward. 2003. Metal behaviour in an estuary polluted by acid mine drainage: The role of particulate matter. Environmental Pollution 121:283–292, https://doi.org/10.1016/S0269-7491(02)00216-6.

Andrade, S., J. Moffett, and J.A. Correa. 2006. Distribution of dissolved species and suspended particulate copper in an intertidal ecosystem affected by copper mine tailings in Northern Chile. Marine Chemistry 101:203–211, https://doi.org/10.1016/j.marchem.2006.03.002.

Ayuso, R.A., and N.K. Foley. 2009. Metal and isotope dispersion in an abandoned heavy metal mine: Callahan, Maine, USA. Geochimica et Cosmochimica Acta 73:A65.

Balistrieri, L.S., A.L. Foster, L.P. Gough, F. Gray, J.J. Rytuba, and L.L. Stillings. 2007. Understanding Metal Pathways in Mineralized Ecosystems. US Geological Survey Circular 1317, 12 pp, http://pubs.usgs.gov/circ/2007/1317.

Balistrieri, L.S., and J.W. Murray. 1982. The adsorption of Cu, Pb, Zn, and Cd on goethite from major ion seawater. Geochimica et Cosmochimica Acta 46:1,253–1,265, https://doi.org/10.1016/0016-7037(82)90010-2.

Bea, S.A., C. Ayora, J. Carrera, M. Saaltink, and B. Dold. 2010. Geochemical and environmental controls on the genesis of soluble efflorescent salts in coastal mine tailings deposits: A discussion based on reactive transport modeling. Journal of Contaminant Hydrology 111:65–82, https://doi.org/10.1016/j.jconhyd.2009.12.005.

Blowes, D.W., C.J. Ptacek, and J. Jurjovec. 2003. Mill tailings: Hydrogeology and geochemistry. Pp. 95–116 in Environmental Aspects of Mine Wastes. J.L. Jambor, D.W. Blowes, A.I.M. Ritchie, eds, Short Course Series, vol. 31, Mineralogical Association of Canada, Ottawa.

Bryan, G.W., and W.J. Langston. 1992. Bioavailability, accumulation and effects of heavy metals in sediments with special reference to United Kingdom estuaries: A review. Environmental Pollution 76:89–131, https://doi.org/10.1016/0269-7491(92)90099-V.

Burd, B.B. 2002. Evaluation of mine tailings effects on a benthic marine infaunal community over 29 years. Marine Environmental Research 53:481–519, https://doi.org/10.1016/S0141-1136(02)00092-2.

Cánovas, C.R., C.G. Hubbard, M. Olías, J.M. Nieto, S. Black, and M.L. Coleman. 2008. Hydrochemical variations and contaminant load in the Río Tinto (Spain) during flood events. Journal of Hydrology 350:25–40, https://doi.org/10.1016/j.jhydrol.2007.11.022.

Carr, R.S., M. Nipper, and G.S. Plumlee. 2003. Survey of marine contamination from mining-related activities on Marinduque Island, Philippines: Porewater toxicity and chemistry. Aquatic Ecosystem Health and Management 6:369–379, https://doi.org/10.1080/714044166.

Castilla, J.C. 1983. Environmental impact in sandy beaches of copper mine tailings at Chañaral, Chile. Marine Pollution Bulletin 14:459–464, https://doi.org/10.1016/0025-326X(83)90046-2.

Cesar, A., A. Marín, L. Marín-Guirao, and R. Vita. 2004. Amphipod and sea urchin tests to assess the toxicity of Mediterranean sediments: The case of Portmán Bay. Scientia Marina 68:205–213, https://doi.org/10.3989/scimar.2004.68s1205.

Cesar, A., A. Marín, L. Marín-Guirao, R. Vita, J. Lloret, and T.A. Del Valls. 2009. Integrative ecotoxicological assessment of sediment in Portmán Bay (southeast Spain). Ecotoxicology and Environmental Safety 72:1,832–1,841, https://doi.org/10.1016/j.ecoenv.2008.12.001.

Cotté-Krief, M-H., C. Guieu, A.J. Thomas, and J.-M. Martin. 2000. Sources of Cd, Cu, Ni and Zn in Portuguese coastal waters. Marine Chemistry 71:199–214, https://doi.org/10.1016/S0304-4203(00)00049-9.

Coumans, C., and MACEC (Marinduque Council for Environmental Concerns). 2002. The Successful Struggle Against STD in Marinduque. Submarine Tailings Disposal Toolkit, Philippines Case Studies - Marinduqe and Mindinoro. Available online at: http://www.miningwatch.ca/submarine-tailings-disposal-toolkit (accessed March 5, 2011).

David, C.P. 2002. Heavy metal concentrations in marine sediments impacted by a mine-tailings spill, Marinduque Island, Philippines. Environmental Geology 42:955–965, https://doi.org/10.1007/s00254-002-0601-4.

David, C.P. 2003. Heavy metal concentrations in growth bands of corals: A record of mine tailings input through time (Marinduque Island, Philippines). Marine Pollution Bulletin 46:187–196, https://doi.org/10.1016/S0025-326X(02)00315-6.

Davis, R.A. Jr., A.T. Welty, J. Borrego, J.A. Morales, J.G. Pendon, and J.G. Ryan. 2000. Rio Tinto estuary (Spain): 5000 years of pollution. Environmental Geology 39:1,107–1,116, https://doi.org/10.1007/s002549900096.

DeForest, D.K., K.V. Brix, and W.J. Adams. 2007. Assessing metal bioaccumulation in aquatic environments: The inverse relationship between bioaccumulation factors, trophic transfer factors and exposure concentration. Aquatic Toxicology 84:236–246, https://doi.org/10.1016/j.aquatox.2007.02.022.

Dold, B. 2006. Element flows associated with marine shore mine tailings deposits. Environmental Science & Technology 40:752–758, https://doi.org/10.1021/es051475z.

Eggleton, J., and K.V. Thomas. 2004. A review of factors affecting the release and bioavailability of contaminants during sediment disturbance events. Environment International 30:973–980, https://doi.org/10.1016/j.envint.2004.03.001.

Elbaz-Poulichet, F., C. Braungardt, E. Achterberg, N. Morley, D. Cossa, J.-M. Beckers, P. Nomérange, A. Cruzado, and M. Leblanc. 2001a. Metal biogeochemistry in the Tinto-Odiel rivers (Southern Spain) and in the Gulf of Cadiz: A synthesis of the results of TOROS project. Continental Shelf Research 21:1,961–1,973, https://doi.org/10.1016/S0278-4343(01)00037-1.

Elbaz-Poulichet, F., N.H. Morley, J.-M. Beckers, and P. Nomerange. 2001b. Metal fluxes through the Strait of Gibraltar: The influence of the Tinto and Odiel rivers (SW Spain). Marine Chemistry 73:193–213, https://doi.org/10.1016/S0304-4203(00)00106-7.

Elberling, B., K.L. Knudsen, P.H. Kristensen, and G. Asmund. 2003. Applying foraminiferal stratigraphy as a biomarker for heavy metal contamination and mining impact in a fiord in West Greenland. Marine Environmental Research 55:235–256, https://doi.org/10.1016/S0141-1136(02)00219-2.

Ellis, D. 2008. The role of deep submarine tailing placement (STP) in the mitigation of marine pollution for coastal and island mines. Pp. 23–51 in Marine Pollution: New Research. T.N. Hofer, ed, Nova Science Publishers, Hauppauge, NY.

Ellis, D., G. Poling, and C. Pelletier. 1994. Case Studies of Submarine Tailings Disposal: Volume II—Worldwide Case Histories and Screening Criteria. US Bureau of Mines Open File Report OFR 37-94, 140 pp, http://wwwdggs.dnr.state.ak.us/pubs/id/21397.

Fallon, S.J., J.C. White, and M.T. McCulloch. 2002. Porites corals as recorders of mining and environmental impacts: Misima Island, Papua New Guinea. Geochimica et Cosmochimica Acta 66:183–187, https://doi.org/10.1016/S0016-7037(01)00715-3.

Fariña, J.M., and J.C. Castilla. 2001. Temporal variation in the diversity and cover of sessile species in rocky intertidal communities affected by copper mine tailings in northern Chile. Marine Pollution Bulletin 42:554–568, https://doi.org/10.1016/S0025-326X(00)00201-0.

Featherstone, A.M., and B.V. O’Grady. 1997. Removal of dissolved copper and iron at the freshwater-saltwater interface of an acid mine stream. Marine Pollution Bulletin 34:332–337, https://doi.org/10.1016/S0025-326X(96)00089-6.

Gould, W.D., and A. Kapoor. 2003. The microbiology of acid mine drainage. Pp. 203–226 in Environmental Aspects of Mine Wastes. J.L. Jambor, D.W. Blowes, and A.I.M.

Ritchie, eds, Short Course Series, vol. 31, Mineralogical Association of Canada, Ottawa.

Griscom, S.B., and N.S. Fisher. 2004. Bioavailability of sediment-bound metals to marine bivalve molluscs: An overview. Estuaries 27:826–838, https://doi.org/10.1007/BF02912044.

Grout, J.A., and C.D. Levings. 2001. Effects of acid mine drainage from an abandoned copper mine, Britannia Mines, Howe Sound, British Columbia, Canada, on transplanted blue mussels (Mytilus edulis). Marine Environmental Research 51:265–288, https://doi.org/10.1016/S0141-1136(00)00104-5.

Hudson-Edwards, K.A., M.G. Macklin, H.E. Jamieson, P.A. Brewer, T.J. Coulthard, A.J. Howard, and J.N. Turner. 2003. The impact of tailings dam spills and clean-up operations on sediment and water quality in river systems: The Rios Agrio-Guadiamar, Aznalcóllar, Spain. Applied Geochemistry 18:221–239, https://doi.org/10.1016/S0883-2927(02)00122-1.

Jambor, J.L. 1994. Mineralogy of sulfide-rich tailings and their alteration products. Pp. 59–102 in Environmental Aspects of Mine Wastes. J.L. Jambor, D.W. Blowes, and A.I.M. Ritchie, eds, Short Course Series, vol. 31, Mineralogical Association of Canada, Ottawa.

Johnson, C.A. 1986. The regulation of trace element concentrations in river and estuarine waters contaminated with acid mine drainage: The adsorption of Cu and Zn on amorphous Fe oxyhydroxides. Geochimica et Cosmochimica Acta 50:2,433–2,438, https://doi.org/10.1016/0016-7037(86)90026-8.

Komárek, M., V. Ettler, V. Chrastny, and M. Mihaljevic. 2008. Lead isotopes in environmental sciences: A review. Environment International 34:562–577, https://doi.org/10.1016/j.envint.2007.10.005.

Koski, R.A., L. Munk, A.L. Foster, W.C. Shanks III, and L.L. Stillings. 2008. Sulfide oxidation and distribution of metals near abandoned copper mines in coastal environments, Prince William Sound, Alaska, USA. Applied Geochemistry 23:227–254, https://doi.org/10.1016/j.apgeochem.2007.10.007.

Langston, W.J., and S.K. Spence. 1995. Biological factors involved in metal concentrations observed in aquatic organisms. Pp. 407–478 in Metal Speciation and Bioavailability in Aquatic Systems. A. Tessier and D.R. Turner, eds, John Wiley & Sons, Chichester, England.

Leblanc, M., J.A. Morales, J. Borrego, and F. Elbaz-Poulichet. 2000. 4,500-year-old mining pollution in southwestern Spain: Long-term implications for modern mining pollution. Economic Geology 95:655–662, https://doi.org/10.2113/gsecongeo.95.3.655.

Lee, B.-G., S.B. Griscom, J.-S. Lee, H.J. Choi, C.-H. Koh, S.N. Luoma, and N.S. Fisher. 2000. Influences of dietary uptake and reactive sulfides on metal bioavailability from aquatic sediments. Science 287:282–284, https://doi.org/10.1126/science.287.5451.282.

Lee, M.R., and J.A. Correa. 2005. Effects of copper mine tailings disposal on littoral meiofaunal assemblages in the Atacama region of northern Chile. Marine Environmental Research 59:1–18, https://doi.org/10.1016/j.marenvres.2004.01.002.

Lee, M.R., J.A. Correa, and R. Seed. 2006. A sediment quality triad assessment of the impact of copper mine tailings disposal on the littoral sedimentary environment in the Atacama region of northern Chile. Marine Pollution Bulletin 52:1,389–1,395, https://doi.org/10.1016/j.marpolbul.2006.03.019.

Leistel, J.M., E. Marcoux, D. Thiéblemont, C. Quesada, A. Sánchez, G.R. Almodóvar, E. Pascual, and R. Sáez. 1998. The volcanic-hosted massive sulphide deposits of the Iberian Pyrite Belt. Mineralium Deposita 33:2–30, https://doi.org/10.1007/s001260050130.

Marsden, A.D., and R.E. DeWreede. 2000. Marine macroalgal community structure, metal content and reproductive function near an acid mine drainage outflow. Environmental Pollution 110:431–440, https://doi.org/10.1016/S0269-7491(99)00321-8.

Martínez-Sánchez, M.J., M.C. Navarro, C. Pérez-Sirvent, J. Marimón, J. Vidal, M.L. García-Lorenzo, and J. Bech. 2008. Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean). Journal of Geochemical Exploration 96:171–182, https://doi.org/10.1016/j.gexplo.2007.04.006.

Mateos, J.C.R. 2001. The case of the Aznalcóllar mine and its impacts on coastal activities in southern Spain. Ocean & Coastal Management 44:105–118, https://doi.org/10.1016/S0964-5691(00)00081-8.

McGeer, J.C., K.V. Brix, J.M. Skeaff, D.K. DeForest, S.I. Brigham, W.J. Adams, and A. Green. 2003. Inverse relationship between bioconcentration factor and exposure concentration for metals: Implications for hazard assessment of metals in the aquatic environment. Environmental Toxicology and Chemistry 22:1,017–1,037, https://doi.org/10.1002/etc.5620220509.

Medina, M., S. Andrade, S. Faugeron, N. Lagos, D. Mella, and J.A. Correa. 2005. Biodiversity of rocky intertidal benthic communities associated with copper mine tailing discharges in northern Chile. Marine Pollution Bulletin 50:369–409, https://doi.org/10.1016/j.marpolbul.2004.11.022.

Mills, A.L. 1999. The role of bacteria in environmental geochemistry. Pp. 125–132 in The Environmental Geochemistry of Mineral Deposits. G.S. Plumlee and M.J. Logsdon, eds, Reviews in Economic Geology, vol. 6A, Society of Economic Geologists, Littleton, CO.

National Oceanic and Atmospheric Administration, Center for Coastal Monitoring and Assessment, Mussel Watch Contaminant Monitoring. 2011. Available online at: http://ccma.nos.noaa.gov/about/coast/nsandt/musselwatch.aspx (accessed March 17, 2011).

Neary, D.G., and P. Garcia-Chevesich. 2008. Hydrology and erosion impacts of mining derived coastal sand dunes, Chañaral Bay, Chile. Hydrology and Water Resources in Arizona and the Southwest 38:47–52. Available online at: http://www.treesearch.fs.fed.us/pubs/30858 (accessed February 17, 2012).

Nordstrom, D.K., and C.N. Alpers. 1999. Geochemistry of acid mine waters. Pp. 133–160 in The Environmental Geochemistry of Mineral Deposits. G.S. Plumlee and M.J.

Logsdon, eds, Reviews in Economic Geology, vol. 6A, Society of Economic Geologists, Littleton, CO.

Olías, M., C.R. Cánovas, J.M. Nieto, and A.M. Sarmiento. 2006. Evaluation of the dissolved contaminant load transported by the Tinto and Odiel rivers (South West Spain). Applied Geochemistry. 21:1,733–1,749, https://doi.org/10.1016/j.apgeochem.2006.05.009.

Plant, J., D. Smith, B. Smith, and L. Williams. 2001. Environmental geochemistry at the global scale. Applied Geochemistry 16:1,291–1,308, https://doi.org/10.1016/S0883-2927(01)00036-1.

Plumlee, G.S. 1999. The environmental geology of mineral deposits. Pp. 71–116 in The Environmental Geochemistry of Mineral Deposits. G.S. Plumlee and M.J. Logsdon, eds, Reviews in Economic Geology, vol. 6A, Society of Economic Geologists, Littleton, CO.

Plumlee, G.S., R.A. Morton, T.P. Boyle, J.H. Medlin, and J.A. Centeno. 2000. An Overview of Mining-Related Environmental and Human Health Issues, Marinduque Island, Philippines: Observations from a Joint US Geological Survey-Armed Forces Institute of Pathology Reconnaissance Field Evaluation, May 12–19, 2000. Open-file Report 00-397, US Geological Survey, Denver, CO, 46 pp. Available online at: http://pubs.usgs.gov/of/2000/ofr-00-0397 (accessed February 17, 2012).

Rainbow, P.S., S. Kriefman, B.D. Smith, and S.N. Luoma. 2011. Have the bioavailabilities of trace metals to a suite of biomonitors changed over three decades in SW England estuaries historically affected by mining? Science of the Total Environment 409:1,589–1,602, https://doi.org/10.1016/j.scitotenv.2011.01.012.

Reeder, R.J., M.A.A. Schoonen, and A. Lanzirotti. 2006. Metal Speciation and its role in bioaccessibility and bioavailability. Reviews in Mineralogy & Geochemistry 64:59–113, https://doi.org/10.2138/rmg.2006.64.3.

Reeder, S. 2007. Global geochemical baselines. Episodes 30:69–72.

Salminen, R., and T. Tarvainen. 1997. The problem of defining geochemical baselines. A case study of selected elements and geological materials in Finland. Journal of Geochemical Exploration 60:91–98, https://doi.org/10.1016/S0375-6742(97)00028-9.

Singer, P.C., and W. Stumm. 1970. Acidic mine drainage: The rate-determining step. Science 167:1,121–1,123, https://doi.org/10.1126/science.167.3921.1121.

Smith, K.S. 1999. Metal sorption on mineral surfaces: An overview with examples relating to mineral deposits. Pp. 161–182 in The Environmental Geochemistry of Mineral Deposits. G.S. Plumlee and M.J. Logsdon, eds, Reviews in Economic Geology, vol. 6A, Society of Economic Geologists, Littleton, CO.

Søndergaard, J., G. Asmund, P. Johansen, and B. Elberling. 2010. Pb isotopes as tracers of mining-related Pb in lichens, seaweed and mussels near a former Pb-Zn mine in West Greenland. Environmental Pollution 158:1,319–1,326, https://doi.org/10.1016/j.envpol.2010.01.006.

Stauber, J.L., S. Andrade, M. Ramirez, M. Adams, and J.A. Correa. 2005. Copper bioavailability in a coastal environment of northern Chile: Comparison of bioassay and analytical speciation approaches. Marine Pollution Bulletin 50:1,363–1,372, https://doi.org/10.1016/j.marpolbul.2005.05.008.

Tessier, A., and D.R. Turner, eds. 1995. Metal Speciation and Bioavailability in Aquatic Systems. John Wiley & Sons, Chichester, England, 679 pp.

Thorne, L.T., and G. Nickless. 1981. The relation between heavy metals and particle size fractions within the Severn estuary (U.K.) inter-tidal sediments. Science of the Total Environment 19:207–213, https://doi.org/10.1016/0048-9697(81)90017-6.

US Environmental Protection Agency. 2009. National recommended water quality criteria. Available online at: http://www.epa.gov/ost/criteria/wqctable (accessed March 17, 2011).

US Food and Drug Administration. 1993. Guidance Document for Lead in Shellfish. US Department of Health and Human Services, Public Health Service, Washington, DC, 45 pp.

van Geen, A., J.F. Adkins, E.A. Boyle, C.H. Nelson, and A. Palanques. 1997. A 120-yr record of widespread contamination from mining of the Iberian pyrite belt. Geology 25:291–294, https://doi.org/10.1130/0091-7613(1997)025<0291:AYROWC>2.3.CO;2.

van Geen, A., E.A. Boyle, and P. Rosener. 1988. Entrainment of trace metal-enriched Atlantic-shelf water in the inflow to the Mediterranean Sea. Nature 331:423–426, https://doi.org/10.1038/331423a0.

Wang, W.-X., and N.S. Fisher. 1999. Delineating metal accumulation pathways for marine invertebrates. Science of the Total Environment 237/238:459–472, https://doi.org/10.1016/S0048-9697(99)00158-8.

Wisskirchen, C., and B. Dold. 2006. The marine shore porphyry copper mine tailings deposit at Chañaral, northern Chile. Pp. 2,480–2,489 in 7th International Conference on Acid Rock Drainage. R.I. Barnhiesel, ed, American Society of Mining and Reclamation, Lexington, KY.

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