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Morphology and Mineralogy of Consolidated Iron Corrosion Products From Historic Shipwrecks in the Gulf of Mexico

Author(s): Brenda J. Little ; Tammie L. Gerke ; Jason S. Lee ; Richard I. Ray

Year: 2015

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Summary

Consolidated iron corrosion products (rusticles, tubercles and flakes) were collected from historic shipwrecks in the Gulf of Mexico before (2004) and after (2014) the Deepwater Horizon oil spill (2010). In all cases the iron corrosion products were stratified. Goethite and lepidocrocite were identified by powder X-ray diffraction in samples before and after the spill. The internal structure of samples collected before the spill has been examined in detail with environmental scanning electron microscopy (ESEM) and transmission electron microscopy (TEM). TEM and ESEM images of core regions indicate iron encrusted stalks indicative of iron-oxidizing bacteria and demonstrate the association of bacteria (conclusion based on shapes and sizes) with iron minerals. Examination of samples collected before and after the spill in impacted and control areas is ongoing.


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Cite this Record

Morphology and Mineralogy of Consolidated Iron Corrosion Products From Historic Shipwrecks in the Gulf of Mexico. Brenda J. Little, Tammie L. Gerke, Jason S. Lee, Richard I. Ray. Presented at Society for Historical Archaeology, Seattle, Washington. 2015 ( tDAR id: 433806)


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Spatial Coverage

min long: -129.199; min lat: 24.495 ; max long: -66.973; max lat: 49.359 ;

Record Identifiers

PaperId(s): 96

Arizona State University The Andrew W. Mellon Foundation National Science Foundation National Endowment for the Humanities Society for American Archaeology Archaeological Institute of America