A grain boundary model of metamorphic reaction
A grain boundary model of metamorphic reaction
复制标题
变质反应的晶界模型
DOI:
10.1007/s00410-024-02100-9
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发表时间:
2024
影响因子:
3.5
通讯作者:
Spear, Frank S.
中科院分区:
文献类型:
--
作者:
Spear, Frank S.
A model is presented whereby metamorphic parageneses are governed by local, nano-scale reactions among adjacent phases along grain boundaries that are driven by local disequilibrium between the solid phases and the grain boundary composition. These reactions modify the grain boundary composition setting up compositional gradients that drive diffusion and change the grain boundary composition elsewhere in the rock, which drive local reactions in these locations. The process may be triggered by the nucleation of a new phase that is out of equilibrium with the existing assemblage and an example is presented based on the transformation of kyanite (Ky) to sillimanite (Sil). Model results reveal that a simple polymorphic transformation (Ky→Sil) can result in local reactions among all phases in the rock and some phases may grow in one locale and be consumed in another. An implication of these results is that interpretation of metamorphic parageneses based on growth or resorption and compositional changes of phases requires careful evaluation of nano-scale processes.
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影响因子:
3.5
作者:
Jay B. Thomas;E. Watson
通讯作者:
E. Watson
影响因子:
3.5
作者:
Gaidies, F.;Pattison, D. R. M.;de Capitani, C.
通讯作者:
de Capitani, C.
影响因子:
2.6
作者:
Castro, Adrian E.;Spear, Frank S.
通讯作者:
Spear, Frank S.
DOI:
10.1073/pnas.0710806105
发表时间:
2008-06
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
作者:
Leslie A. Hayden;E. Watson
通讯作者:
Leslie A. Hayden;E. Watson
影响因子:
3.9
作者:
F. Spear;J. Pyle
通讯作者:
F. Spear;J. Pyle