Effect of oxygen partial pressure on the dislocation recovery in olivine: a new constraint on creep mechanisms期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Effect of oxygen partial pressure on the dislocation recovery in olivine: a new constraint on creep mechanisms

Authors:	Shun-ichiro Karato Hiroki Sato

Institution:	Research School of Earth Sciences, The Australian National University, Canberra 2600 Australia;Ocean Research Institute, University of Tokyo, Minamidai, Nakano, Tokyo 164 Japan

Abstract:	The dislocation annihilation rate in experimentally deformed olivine single crystals was measured as a function of oxygen partial pressure (P_O₂). It was shown that the dislocation annihilation rate decreased with increasing P_O₂. This result is inconsistent with the reported P_O₂ dependence of creep rate ( $～ P_{O_{2}}^{+16}$ ) in single olivine crystals, thus indicating that the creep in single olivine crystals is not rate-controlled by recovery, under the experimentally investigated conditions.

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