Examination of subaerially altered basaltic glass with TEM and EELS

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We have examined the weathered surfaces of 720 year old Hawaiian basalt glasses that were recovered from a subaerial environment with high-resolution transmission electron microscopy (TEM) and energy filtered imaging and electron energy loss spectroscopy (EELS) techniques. Whereas the alteration products (palagonite) were physically detached from the underlying glass in most samples, a gel-like amorphous layer was observed adjacent to the glass in a few samples. To our knowledge, this is the first time a gel layer has been observed on weathered basalt. This is significant because analogous gel layers have been observed on nuclear waste glasses reacted in laboratory ... continued below

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11 p.

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Luo, J.-S. June 17, 1998.

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Description

We have examined the weathered surfaces of 720 year old Hawaiian basalt glasses that were recovered from a subaerial environment with high-resolution transmission electron microscopy (TEM) and energy filtered imaging and electron energy loss spectroscopy (EELS) techniques. Whereas the alteration products (palagonite) were physically detached from the underlying glass in most samples, a gel-like amorphous layer was observed adjacent to the glass in a few samples. To our knowledge, this is the first time a gel layer has been observed on weathered basalt. This is significant because analogous gel layers have been observed on nuclear waste glasses reacted in laboratory tests, and this demonstrates an important similarity in the mechanisms of the weathering of basalt and the corrosion of waste glasses.

Physical Description

11 p.

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INIS; OSTI as DE00010542

Medium: P; Size: 11 pages

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  • 100th Annual Meeting of the American Ceramic Society, Cincinnati, OH (US), 05/03/1998--05/06/1998

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  • Report No.: ANL/CMT/CP-95167
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10542
  • Archival Resource Key: ark:/67531/metadc620972

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  • June 17, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 6, 2017, 7:30 p.m.

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Luo, J.-S. Examination of subaerially altered basaltic glass with TEM and EELS, article, June 17, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc620972/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.