A new generation Griggs apparatus with active acoustic monitoring
A new generation Griggs apparatus with active acoustic monitoring
复制标题
具有主动声学监测功能的新一代 Griggs 装置
DOI:
10.1016/j.tecto.2021.229032
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发表时间:
2021
期刊:
影响因子:
2.9
通讯作者:
Schubnel, Alexandre
中科院分区:
文献类型:
--
作者:
Moarefvand, Arefeh;Gasc, Julien;Fauconnier, Julien;Baïsset, Marie;Burdette, Eric;Labrousse, Loïc;Schubnel, Alexandre
High pressure and temperature experiments are necessary to understand geological processes at deep earth conditions. Here, we present a new generationGriggs-type apparatus, designed to perform deformation experiments at P-T conditions of the lower crust and upper mantle, i.e. up to 5 GPa and 1000 °C. We first detail the experimental design, set-up and procedure, as well as the calibration protocol of the apparatus. The main innovation of this new set-up is the development of an active acoustic monitoring pulse-transmission technique, which enables us to monitor the evolution of P-wave elastic velocities, at 5 MHz, contemporaneously with deformation. This may provide information on the evolution of the microstructure, in particular when mineralogical (metamorphic) reactions are taking place. For instance, P-wave velocity variations across the α → β quartz transition are recorded for the first time within aGriggsapparatus, at 0.5 and 0.8 GPa. This new set-up opens up important perspectives for the study of the complex couplings that may take place between mineral reactions and deformation under in lithospheric stress and temperature conditions.
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期刊:
Journal of Visualized Experiments
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