Subgrain boundaries and related microstructural features in EDML (Antarctica) deep ice core
| Cobertura |
LATITUDE: -75.002500 * LONGITUDE: 0.068400 * DATE/TIME START: 2001-01-10T00:00:00 * DATE/TIME END: 2006-01-17T00:00:00 |
|---|---|
| Data(s) |
13/02/2009
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| Resumo |
Subgrain boundaries revealed as shallow sublimation grooves on ice sample surfaces are a direct and easily observable feature of intracrystalline deformation and recrystallization. Statistical data obtained from the EPICA Dronning Maud Land (EDML) deep ice core drilled in East Antarctica cannot detect a depth region of increased subgrain-boundary formation. Grain-boundary morphologies show a strong influence of internal strain energy on the microstructure at all depths. The data do not support the classical view of a change of dominating recrystallization regimes with depth. Three major types of subgrain boundaries, reflecting high mechanical anisotropy, are specified in combination with crystal-orientation analysis. |
| Formato |
application/zip, 2 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.807197 doi:10.1594/PANGAEA.807197 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Weikusat, Ilka; Kipfstuhl, Sepp; Faria, Sérgio H; Azuma, Nobuhiko; Miyamoto, Atsushi (2009): Subgrain boundaries and related microstructural features in EDML (Antarctica) deep ice core. Journal of Glaciology, 55(191), 461-472, doi:10.3189/002214309788816614 |
| Palavras-Chave | #?-Type; containing subgrain-boundary; DEPTH, ice/snow; Depth ice/snow; DFG-Schwerpunktprogramm 1158 - Antarktisforschung; DFG-SPP1158; DML28C01_00; EDML; EDRILL; EPICA; EPICA-Campaigns; EPICA drill; European Project for Ice Coring in Antarctica; Grains; Grain size, mean radius; Kohnen Station; n-Type; p-Type; Radius; sGB dens; sGB type; Subgrain-boundary density; Subgrain-boundary type; z-Type |
| Tipo |
Dataset |
