Search Results - "Eckley, S."

Emplacement of shergottites in the Martian crust inferred from three‐dimensional petrofabric and crystal size distribution analyses by Eckley, S. A., Ketcham, R. A., Liu, Y., Gross, J., McCubbin, F. M.

“…Shergottites are mafic to ultramafic igneous rocks that represent the majority of known Martian meteorites. They are subdivided into gabbroic, poikilitic,…”
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Volatiles, vesicles, and vugs: Unraveling the magmatic and eruptive histories of Steno crater basalts by Wilbur, Z. E., Barnes, J. J., Eckley, S. A., Ong, I. J., Brounce, M., Crow, C. A., Erickson, T., Kent, J. J., Boyce, J. W., Mosenfelder, J. L., Hahn, T., McCubbin, F. M., Zega, T. J.

“…In 1972, Apollo 17 astronauts returned 170.4 kg of lunar material. Within 1 month of their return, a subset of those samples was specially curated with the…”
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Scaling Non-Point-Source Mercury Emissions from Two Active Industrial Gold Mines: Influential Variables and Annual Emission Estimates by Eckley, C. S, Gustin, M, Miller, M. B, Marsik, F

“…Open-pit gold mines encompass thousands of hectares of disturbed materials that are often naturally enriched in mercury (Hg). The objective of this study was…”
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Apollo Next Generation Sample Analysis (ANGSA): an Apollo Participating Scientist Program to Prepare the Lunar Sample Community for Artemis by Shearer, C. K., McCubbin, F. M., Eckley, S., Simon, S. B., Meshik, A., McDonald, F., Schmitt, H. H., Zeigler, R. A., Gross, J., Mitchell, J., Krysher, C., Morris, R. V., Parai, R., Jolliff, B. L., Gillis-Davis, J. J., Joy, K. H., Bell, S. K., Lucey, P. G., Sun, L., Sharp, Z. D., Dukes, C., Sehlke, A., Mosie, A., Allton, J., Amick, C., Simon, J. I., Erickson, T. M., Barnes, J. J., Dyar, M. D., Burgess, K., Petro, N., Moriarty, D., Curran, N. M., Elsila, J. E., Colina-Ruiz, R. A., Kroll, T., Sokaras, D., Ishii, H. A., Bradley, J. P., Sears, D., Cohen, B., Pravdivseva, O., Thompson, M. S., Neal, C. R., Hana, R., Ketcham, R., Welten, K.

“…As a first step in preparing for the return of samples from the Moon by the Artemis Program, NASA initiated the Apollo Next Generation Sample Analysis Program…”
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The influence of dynamic chamber design and operating parameters on calculated surface-to-air mercury fluxes by Eckley, C.S., Gustin, M., Lin, C.-J., Li, X., Miller, M.B.

“…Dynamic Flux Chambers (DFCs) are commonly applied for the measurement of non-point source mercury (Hg) emissions from a wide range of surfaces. A standard…”
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Using mercury stable isotope fractionation to identify the contribution of historical mercury mining sources present in downstream water, sediment and fish by Eckley, Chris S, Eagles-Smith, Collin, Luxton, Todd P, Hoffman, Joel, Janssen, Sarah

“…Ecosystems downstream of mercury (Hg) contaminated sites can be impacted by both localized releases as well as Hg deposited to the watershed from atmospheric…”
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Simulated rain events on an urban roadway to understand the dynamics of mercury mobilization in stormwater runoff by Eckley, Chris S., Branfireun, Brian

“…This research focuses on mercury (Hg) mobilization in stormwater runoff from an urban roadway. The objectives were to determine: how the transport of…”
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Measurement of surface mercury fluxes at active industrial gold mines in Nevada (USA) by Eckley, C.S., Gustin, M., Marsik, F., Miller, M.B.

“…Mercury (Hg) may be naturally associated with the rock units hosting precious and base metal deposits. Active gold mines are known to have point source…”
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Mercury mobilization in urban stormwater runoff by Eckley, Chris S., Branfireun, Brian

“…Urban stormwater runoff has been identified as a leading cause of waterway impairment for many pollutants, but there has been a lack of research that directly…”
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Ambient Mercury Observations near a Coal-Fired Power Plant in a Western U.S. Urban Area by Gratz, Lynne E, Eckley, Chris S, Schwantes, Story J, Mattson, Erick

“…We report on the continuous ambient measurements of total gaseous mercury (TGM) and several ancillary air quality parameters that were collected in Colorado…”
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Challenges and opportunities for managing aquatic mercury pollution in altered landscapes by Hsu-Kim, Heileen, Eckley, Chris S., Achá, Dario, Feng, Xinbin, Gilmour, Cynthia C., Jonsson, Sofi, Mitchell, Carl P. J.

“…The environmental cycling of mercury (Hg) can be affected by natural and anthropogenic perturbations. Of particular concern is how these disruptions increase…”
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Water-level fluctuations influence sediment porewater chemistry and methylmercury production in a flood-control reservoir by Eckley, Chris S., Luxton, Todd P., Goetz, Jennifer, McKernan, John

“…Reservoirs typically have elevated fish mercury (Hg) levels compared to natural lakes and rivers. A unique feature of reservoirs is water-level management…”
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The assessment and remediation of mercury contaminated sites: A review of current approaches by Eckley, Chris S., Gilmour, Cynthia C., Janssen, Sarah, Luxton, Todd P., Randall, Paul M., Whalin, Lindsay, Austin, Carrie

“…Remediation of mercury (Hg) contaminated sites has long relied on traditional approaches, such as removal and containment/capping. Here we review contemporary…”
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Soil–Air Mercury Flux near a Large Industrial Emission Source before and after Closure (Flin Flon, Manitoba, Canada) by Eckley, Chris S, Blanchard, Pierrette, McLennan, Daniel, Mintz, Rachel, Sekela, Mark

“…Prior to its closure, the base-metal smelter in Flin Flon, Manitoba, Canada was one of the North America’s largest mercury (Hg) emission sources. Our project…”
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Methylmercury Production and Degradation under Light and Dark Conditions in the Water Column of the Hells Canyon Reservoirs, USA by Eckley, Chris S., Luxton, Todd P., Knightes, Christopher D., Shah, Vishal

“…Methylmercury (MeHg) is a highly toxic form of mercury that can bioaccumulate in fish tissue. Methylmercury is produced by anaerobic bacteria, many of which…”
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Mercury biogeochemical cycling: A synthesis of recent scientific advances by Gustin, Mae Sexauer, Bank, Michael S., Bishop, Kevin, Bowman, Katlin, Branfireun, Brian, Chételat, John, Eckley, Chris S., Hammerschmidt, Chad R., Lamborg, Carl, Lyman, Seth, Martínez-Cortizas, Antonio, Sommar, Jonas, Tsui, Martin Tsz-Ki, Zhang, Tong

“…The focus of this paper is to briefly discuss the major advances in scientific thinking regarding: a) processes governing the fate and transport of mercury in…”
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Determination of mercury methylation potentials in the water column of lakes across Canada by Eckley, Chris S., Hintelmann, Holger

“…A stable isotope technique was used to trace the formation of methylmercury in lake water incubation assays at in situ conditions in five lakes across Canada…”
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A Critical Time for Mercury Science to Inform Global Policy by Chen, Celia Y, Driscoll, Charles T, Eagles-Smith, Collin A, Eckley, Chris S, Gay, David A, Hsu-Kim, Heileen, Keane, Susan E, Kirk, Jane L, Mason, Robert P, Obrist, Daniel, Selin, Henrik, Selin, Noelle E, Thompson, Marcella R

“…Mercury is a global pollutant released into the biosphere by varied human activities including coal combustion, mining, artisanal gold mining, cement…”
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Evaluating the influence of seasonal stratification on mercury methylation rates in the water column and sediment in a contaminated section of a western U.S.A. reservoir by Millard, Geoffrey, Eckley, Chris S., Luxton, Todd P., Krabbenhoft, David, Goetz, Jennifer, McKernan, John, DeWild, John

“…Mercury methylation frequently occurs at the active oxic/anoxic boundary between the sediment bed and water column of lakes and reservoirs. Previous studies…”
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A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends by Cole, Amanda, Steffen, Alexandra, Eckley, Chris, Narayan, Julie, Pilote, Martin, Tordon, Rob, Graydon, Jennifer, St. Louis, Vincent, Xu, Xiaohong, Branfireun, Brian

“…Atmospheric mercury (Hg) measurements from across Canada were compiled and analysed as part of a national Hg science assessment. Here we update long-term…”
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