Search Results - "Robert R. Seal"

Mineralogy and the release of trace elements from slag from the Hegeler Zinc smelter, Illinois (USA) by Piatak, Nadine M., Seal, Robert R.

“…Slag from the former Hegeler Zn-smelting facility in Illinois (USA) is mainly composed of spinifex Ca-rich plagioclase, fine-grained dendritic or…”
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Mineralogy and environmental geochemistry of historical iron slag, Hopewell Furnace National Historic Site, Pennsylvania, USA by Piatak, Nadine M., Seal, Robert R.

“…► Historical iron slag is chemically dominated by Al2O3, Cao, MgO, and SiO2. ► Some samples are enriched in elements such as As, Cd, Cu, and Mn. ► Mineralogy…”
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Magnesium and calcium sulfate stabilities and the water budget of Mars by Chou, I-Ming, Seal II, Robert R.

“…Magnesium sulfate probably plays a dominant role in the water cycle of Mars away from the polar ice caps through hydration and dehydration reactions. This…”
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Assessing the concentration, speciation, and toxicity of dissolved metals during mixing of acid-mine drainage and ambient river water downstream of the Elizabeth Copper Mine, Vermont, USA by Balistrieri, Laurie S., Seal, Robert R., Piatak, Nadine M., Paul, Barbara

“…The authors determine the composition of a river that is impacted by acid-mine drainage, evaluate dominant physical and geochemical processes controlling the…”
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Characteristics and environmental aspects of slag: A review by Piatak, Nadine M., Parsons, Michael B., Seal, Robert R.

“…•Summarize mineralogy and geochemistry of ferrous and non-ferrous slags.•Discuss potential environmental issues related to weathering of slag dumps.•Outline…”
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Geochemical Characterization of Iron and Steel Slag and Its Potential to Remove Phosphate and Neutralize Acid by Nadine M. Piatak, Robert R. Seal, Darryl A. Hoppe, Carlin J. Green, Paul M. Buszka

“…Iron and steel slags from legacy and modern operations in the Chicago-Gary area of Illinois and Indiana, USA, are predominantly composed of Ca (10−44 wt. %…”
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Copper Speciation in Variably Toxic Sediments at the Ely Copper Mine, Vermont, United States by Kimball, Bryn E, Foster, Andrea L, Seal, Robert R, Piatak, Nadine M, Webb, Samuel M, Hammarstrom, Jane M

“…At the Ely Copper Mine Superfund site, Cu concentrations exceed background values in both streamwater (160–1200 times) and sediments (15–79 times). Previously,…”
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Mineralogical and geochemical controls on the release of trace elements from slag produced by base- and precious-metal smelting at abandoned mine sites by Piatak, Nadine M, Seal, Robert R, Hammarstrom, Jane M

“…Slag collected from smelter sites associated with historic base-metal mines contains elevated concentrations of trace elements such as Cu, Zn and Pb…”
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A novel non-destructive workflow for examining germanium and co-substituents in ZnS by Hayes, Sarah M., McAleer, Ryan J., Piatak, Nadine M., White, Sarah Jane O., Seal, Robert R.

“…A suite of complementary techniques was used to examine germanium (Ge), a byproduct critical element, and co-substituent trace elements in ZnS and mine wastes…”
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Geochemical and isotopic (Nd–Pb–Sr–O) variations bearing on the genesis of volcanic rocks from Vesuvius, Italy by Ayuso, Robert A, De Vivo, Benedetto, Rolandi, Giuseppe, Seal, Robert R, Paone, Angelo

“…Alkaline volcanism produced by Monte Somma–Vesuvius volcano includes explosive plinian and subplinian activity in addition to effusive lava flows. Pumice,…”
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Geoenvironmental Model for Roll-Type Uranium Deposits in the Texas Gulf Coast by Katherine Walton-Day, Johanna Blake, Robert R. Seal, Tanya J. Gallegos, Jean Dupree, Kent D. Becher

“…Geoenvironmental models were formulated by the U.S. Geological Survey in the 1990s to describe potential environmental effects of extracting different types of…”
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Developing protocols for geochemical baseline studies: An example from the Coles Hill uranium deposit, Virginia, USA by Levitan, Denise M., Schreiber, Madeline E., Seal, Robert R., Bodnar, Robert J., Aylor, Joseph G.

“…•We outline protocols for baseline geochemical surveys of stream sediments and water.•Regression on order statistics was used to handle non-detect data.•U…”
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Lead isotope evidence for metal dispersal at the Callahan Cu–Zn–Pb mine: Goose Pond tidal estuary, Maine, USA by Ayuso, Robert A., Foley, Nora K., Seal, Robert R., Bove, Marianna, Civitillo, Diego, Cosenza, Antonio, Grezzi, Giuseppe

“…The abandoned massive sulfide Callahan mine, coastal Maine, is unique because the open pit operation was sited in a drained marine estuary. About 5million tons…”
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Germanium redistribution during weathering of Zn mine wastes: Implications for environmental mobility and recovery of a critical mineral by White, Sarah Jane O., Piatak, Nadine M., McAleer, Ryan J., Hayes, Sarah M., Seal, Robert R., Schaider, Laurel A., Shine, James P.

“…Germanium (Ge) is a metal used in emerging energy technologies, communications, and defense, and has been deemed critical by the United States due to its…”
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Eutrophication and carbon sources in Chesapeake Bay over the last 2700 yr: human impacts in context by Bratton, John F., Colman, Steven M., Seal, Robert R.

“…To compare natural variability and trends in a developed estuary with human-influenced patterns, stable isotope ratios (δ 13C and δ 15N) were measured in…”
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Environmental geochemistry of a Kuroko-type massive sulfide deposit at the abandoned Valzinco mine, Virginia, USA by Seal, Robert R., Hammarstrom, Jane M., Johnson, Adam N., Piatak, Nadine M., Wandless, Gregory A.

“…The abandoned Valzinco mine, which worked a steeply dipping Kuroko-type massive sulfide deposit in the Virginia Au–pyrite belt, contributed significant…”
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Sulfur and lead isotope geochemistry of hypogene mineralization at the Barite Hill Gold Deposit, Carolina Slate Belt, southeastern United States: a window into and through regional metamorphism by Seal, Robert R, Ayuso, Robert A, Foley, Nora K, Clark, Sandra HB

“…The Barite Hill gold deposit, at the southwestern end of the Carolina slate belt in the southeastern United States, is one of four gold deposits in the region…”
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Sulfide oxidation: Insights from experimental, theoretical, stable isotope, and predictive studies in the field and laboratory by Seal, Robert R., Shanks, Wayne C.

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Determination of epsomite-hexahydrite equilibria by the humidity-buffer technique at 0.1 MPa with implications for phase equilibria in the system MgSO4-H2O by Chou, I-Ming, Seal, 2nd, Robert R

“…Epsomite (MgSO(4).7H(2)O) and hexahydrite (MgSO(4).6H(2)O) are common minerals found in marine evaporite deposits, in saline lakes as precipitates, in…”
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Birth of the modern Chesapeake Bay estuary between 7.4 and 8.2 ka and implications for global sea-level rise by Bratton, John F., Colman, Steven M., Thieler, E. Robert, Seal, Robert R.

“…Two major pulses of sea-level rise are thought to have taken place since the last glacial maximum - meltwater pulses (mwp) 1A (12 cal ka) and 1B (9.5 cal ka)…”
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