Search Results - "Brachfeld, Stefanie"

Role of coal ash morphology and composition in delivery and transport of trace metals in the aquatic environment by Cowan, Ellen A., Wang, Zhen, Brachfeld, Stefanie A., Hageman, Steven J., Seramur, Keith C., Pearson, W. Forest, Wilson, Jessica, Karcher, Randall, Hill, Robert, Vengosh, Avner

“…Fly ash is predominately the inorganic byproduct of coal combustion for electrical power generation. It is composed of aluminosilicates with Fe, Mg, K, and Ca…”
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Evaluating the Role of Titanomagnetite in Bubble Nucleation: Novel Applications of Low Temperature Magnetic Analysis and Textural Characterization of Rhyolite Pumice and Obsidian From Glass Mountain, California by McCartney, Kelly N., Hammer, Julia E., Shea, Thomas, Brachfeld, Stefanie, Giachetti, Thomas

“…Nucleation of H2O vapor bubbles in magma requires surpassing a chemical supersaturation threshold via decompression. The threshold is minimized in the presence…”
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Evaluating the Role of Titanomagnetite in Bubble Nucleation: Rock Magnetic Detection and Characterization of Nanolites and Ultra‐Nanolites in Rhyolite Pumice and Obsidian From Glass Mountain, California by Brachfeld, Stefanie, McCartney, Kelly N., Hammer, Julia E., Shea, Thomas, Giachetti, Thomas

“…We document the presence, composition, and number density (TND) of titanomagnetite nanolites and ultra‐nanolites in aphyric rhyolitic pumice, obsidian, and…”
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Authigenic Ferrimagnetic Iron Sulfide Preservation Due to Nonsteady State Diagenesis: A Perspective From Perseverance Drift, Northwestern Weddell Sea by Brendan T. Reilly, Michael L. McCormick, Stefanie A. Brachfeld, Brian A. Haley

“…Abstract We document magnetic mineral diagenesis with high‐resolution magnetic susceptibility, hysteresis, isothermal remanent magnetization, and other rock…”
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A Geochemical Mechanism for >10 m Apparent Downward Offsets of Magnetic Reversals Inferred From Comparison of Two Scotia Sea Drill Sites by Reilly, Brendan T., Tauxe, Lisa, Brachfeld, Stefanie A., Kenlee, Bridget, Gutjahr, Marcus, Dale, Andrew W., Hernández‐Almeida, Iván, Hemming, Sidney, Bailey, Ian, Zheng, Xufeng, Cheu, Daven, Taglienti, Reece, Weber, Michael E., Raymo, Maureen E., Williams, Trevor

“…We document an apparent downward displacement of the Matuyama‐Brunhes magnetic reversal by ∼20 m at Scotia Sea International Ocean Discovery Program Site U1538…”
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Geochemical fingerprints of glacially eroded bedrock from West Antarctica: Detrital thermochronology, radiogenic isotope systematics and trace element geochemistry in Late Holocene glacial-marine sediments by Simões Pereira, Patric, van de Flierdt, Tina, Hemming, Sidney R., Hammond, Samantha J., Kuhn, Gerhard, Brachfeld, Stefanie, Doherty, Cathleen, Hillenbrand, Claus-Dieter

“…Geochemical provenance studies of glacial-marine sediments provide a powerful approach to describe subglacial geology, sediment transport pathways, and past…”
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Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years by Weber, Michael E., Bailey, Ian, Hemming, Sidney R., Martos, Yasmina M., Reilly, Brendan T., Ronge, Thomas A., Brachfeld, Stefanie, Williams, Trevor, Raymo, Maureen, Belt, Simon T., Smik, Lukas, Vogel, Hendrik, Peck, Victoria L., Armbrecht, Linda, Cage, Alix, Cardillo, Fabricio G., Du, Zhiheng, Fauth, Gerson, Fogwill, Christopher J., Garcia, Marga, Garnsworthy, Marlo, Glüder, Anna, Guitard, Michelle, Gutjahr, Marcus, Hernández-Almeida, Iván, Hoem, Frida S., Hwang, Ji-Hwan, Iizuka, Mutsumi, Kato, Yuji, Kenlee, Bridget, OConnell, Suzanne, Pérez, Lara F., Seki, Osamu, Stevens, Lee, Tauxe, Lisa, Tripathi, Shubham, Warnock, Jonathan, Zheng, Xufeng

“…The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their…”
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Miocene to present oceanographic variability in the Scotia Sea and Antarctic ice sheets dynamics: Insight from revised seismic-stratigraphy following IODP Expedition 382 by Pérez, Lara F., Martos, Yasmina M., García, Marga, Weber, Michael E., Raymo, Maureen E., Williams, Trevor, Bohoyo, Fernando, Armbrecht, Linda, Bailey, Ian, Brachfeld, Stefanie, Glüder, Anna, Guitard, Michelle, Gutjahr, Marcus, Hemming, Sidney, Hernández-Almeida, Iván, Hoem, Frida S., Kato, Yuji, O'Connell, Suzanne, Peck, Victoria L., Reilly, Brendan, Ronge, Thomas A., Tauxe, Lisa, Warnock, Jonathan, Zheng, Xufeng

“…•Core-log-seismic correlation allows to assign ages to the Scotia Sea seismic record.•Major implications are derived on the relation between regional and…”
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The geochemical and mineralogical fingerprint of West Antarctica's weak underbelly: Pine Island and Thwaites glaciers by Simões Pereira, Patric, van de Flierdt, Tina, Hemming, Sidney R., Frederichs, Thomas, Hammond, Samantha J., Brachfeld, Stefanie, Doherty, Cathleen, Kuhn, Gerhard, Smith, James A., Klages, Johann P., Hillenbrand, Claus-Dieter

“…The marine-based West Antarctic Ice Sheet (WAIS) is considered the most unstable part of the Antarctic Ice Sheet, with particular vulnerability in the Amundsen…”
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Characterization of coal ash released in the TVA Kingston spill to facilitate detection of ash in river systems using magnetic methods by Cowan, Ellen A., Gaspari, Daniel P., Brachfeld, Stefanie A., Seramur, Keith C.

“…•Kingston coal ash increases magnetic susceptibility of riverbed sediment.•Fluvial transport both enriches and dilutes the magnetic fraction of coal…”
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Magnetic susceptibility as a proxy for coal ash pollution within riverbed sediments in a watershed with complex geology (southeastern USA) by Cowan, Ellen A., Epperson, Erin E., Seramur, Keith C., Brachfeld, Stefanie A., Hageman, Steven J.

“…A study of near surface sediments from the Dan River (southeastern USA) was conducted to assess the use of magnetic properties as proxies of coal ash after a…”
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Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins by Pierce, Elizabeth L., Williams, Trevor, van de Flierdt, Tina, Hemming, Sidney R., Goldstein, Steven L., Brachfeld, Stefanie A.

“…The Wilkes and Aurora basins are large, low‐lying sub‐glacial basins that may cause areas of weakness in the overlying East Antarctic ice sheet. Previous work…”
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Significance of Secondary Fe-Oxide and Fe-Sulfide Minerals in Upper Peak Ring Suevite from the Chicxulub Impact Structure by Christina M. Verhagen, Ji-In Jung, Sonia M. Tikoo, Axel Wittmann, David A. Kring, Stefanie Brachfeld, Laying Wu, Dale H. Burns, Sean P. S. Gulick

“…The suevite (polymict melt rock-bearing breccia) composing the upper peak ring of the Chicxulub impact crater is extremely heterogeneous, containing a…”
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Multicomponent cubic oxide exsolution in synthetic basalts: Temperature dependence and implications for magnetic properties by Bowles, Julie A., Tatsumi-Petrochilos, Lisa, Hammer, Julia E., Brachfeld, Stefanie A.

“…Although the compositional unmixing of cubic‐structured iron oxides has profound effects on the magnetic properties of rocks that contain them, a basic…”
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New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene by Reilly, Brendan T., Tauxe, Lisa, Brachfeld, Stefanie, Raymo, Maureen, Bailey, Ian, Hemming, Sidney, Weber, Michael E., Williams, Trevor, Garcia, Marga, Guitard, Michelle, Martos, Yasmina M., Pérez, Lara F., Zheng, Xufeng, Armbrecht, Linda, Cardillo, Fabricio G., Du, Zhiheng, Fauth, Gerson, Glueder, Anna, Gutjahr, Marcus, Hernández‐Almeida, Iván, Hoem, Frida S., Hwang, Ji‐Hwan, Iizuka, Mutsumi, Kato, Yuji, Kenlee, Bridget, O’Connell, Suzanne, Peck, Victoria, Ronge, Thomas A., Seki, Osamu, Tripathi, Shubham, Warnock, Jonathan

“…International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Sea’s Iceberg Alley recovered among the most continuous and highest resolution…”
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Paleomagnetic constraints on the Holocene stratigraphy of the Arctic Alaskan margin by Lisé-Pronovost, Agathe, St-Onge, Guillaume, Brachfeld, Stefanie, Barletta, Francesco, Darby, Dennis

“…Two long Holocene piston cores (HLY0501-06JPC and -08JPC; herein after referred to as 6JPC and 8JPC) were raised from high sediment accumulation areas in the…”
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Neogene tectonic and climatic evolution of the Western Ross Sea, Antarctica — Chronology of events from the AND-1B drill hole by Wilson, Gary S., Levy, Richard H., Naish, Tim R., Powell, Ross D., Florindo, Fabio, Ohneiser, Christian, Sagnotti, Leonardo, Winter, Diane M., Cody, Rosemary, Henrys, Stuart, Ross, Jake, Krissek, Larry, Niessen, Frank, Pompillio, Massimo, Scherer, Reed, Alloway, Brent V., Barrett, Peter J., Brachfeld, Stefanie, Browne, Greg, Carter, Lionel, Cowan, Ellen, Crampton, James, DeConto, Robert M., Dunbar, Gavin, Dunbar, Nelia, Dunbar, Robert, von Eynatten, Hilmar, Gebhardt, Catalina, Giorgetti, Giovanna, Graham, Ian, Hannah, Mike, Hansaraj, Dhiresh, Harwood, David M., Hinnov, Linda, Jarrard, Richard D., Joseph, Leah, Kominz, Michelle, Kuhn, Gerhard, Kyle, Philip, Läufer, Andreas, McIntosh, William C., McKay, Robert, Maffioli, Paola, Magens, Diana, Millan, Christina, Monien, Donata, Morin, Roger, Paulsen, Timothy, Persico, Davide, Pollard, David, Raine, J. Ian, Riesselman, Christina, Sandroni, Sonia, Schmitt, Doug, Sjunneskog, Charlotte, Strong, C. Percy, Talarico, Franco, Taviani, Marco, Villa, Giuliana, Vogel, Stefan, Wilch, Tom, Williams, Trevor, Wilson, Terry J., Wise, Sherwood

“…Stratigraphic drilling from the McMurdo Ice Shelf in the 2006/2007 austral summer recovered a 1284.87m sedimentary succession from beneath the sea floor. Key…”
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Rock-magnetic and remanence properties of synthetic Fe-rich basalts: Implications for Mars crustal anomalies by Brachfeld, Stefanie A., Hammer, Julia

“…We characterized the magnetic mineral assemblage and remanence properties of a set of synthetic samples patterned on the meteorite-derived basalt composition A…”
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High-field magnetic susceptibility ( χ HF) as a proxy of biogenic sedimentation along the Antarctic Peninsula by Brachfeld, Stefanie A.

“…High-field mass-normalized magnetic susceptibility ( χ HF) is presented as a proxy for biogenic sedimentation in glacimarine sediment from the western…”
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Glacial morphology and sediment formation in the Mertz Trough, East Antarctica by McMullen, Katherine, Domack, Eugene, Leventer, Amy, Olson, Caroline, Dunbar, Robert, Brachfeld, Stefanie

“…The Nathaniel B. Palmer 01-01 cruise produced a SeaBeam map showing unprecedented detail of the bathymetry in the Mertz Trough of East Antarctica. In addition,…”
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