Antigorite–olivine aggregates were synthesized to serve as representative lithologies of subduction zones, which often suffered serpentinization due to the hydration of the mantle wedge. The electrical conductivities (EC) of antigorite–olivine aggregates with different antigorite proportions before and after dehydration at 2.0 GPa were measured. An increase in electrical conductivity prior to antigorite dehydration was due to Fe and Mg interdiffusion with an activation enthalpy of 130–200 kJ/mol. The electrical conductivity of the aggregates increased to 0.1 S/m due to antigorite dehydration. The electrical conductivity of 0.1 S/m derived from the laboratory experiments is consistent with geophysical observations. Combined cube model and modified Archie's law model with previous studies, the volume fractions of aqueous fluids in the mantle wedge of cold and hot subduction zones were estimated.

中文翻译：

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高温高压下叶蛇纹石-橄榄石聚集体的电导率：对地幔楔中含水量的影响

叶蛇纹石-橄榄石聚集体被合成作为俯冲带的代表性岩性，由于地幔楔的水合作用，俯冲带经常遭受蛇纹石化。测量了不同叶蛇纹石比例的叶蛇纹石-橄榄石聚集体在 2.0 GPa 脱水前后的电导率（EC）。叶蛇纹石脱水前电导率的增加是由于 Fe 和 Mg 的相互扩散，活化焓为 130-200 kJ/mol。由于叶蛇纹石脱水，聚集体的电导率增加至 0.1 S/m。实验室实验得出的电导率为0.1 S/m，与地球物理观测结果一致。结合立方模型和修正阿奇定律模型与前人研究相结合，估算了冷热俯冲带地幔楔中水流体的体积分数。