We present integrated structural, petrological, mineralogical and geochemical investigations conducted on an exhumed hydrothermal system identified in Terre-de-Haut Island (Guadeloupe archipelago). This work demonstrates, for the first time, the occurrence of ductile shear zones, marked by the development of spaced schistosity planes generated by pressure-solution processes. We unravel first that the development of spaced schistosity is coeval with high-temperature hydrothermalism (approximately 350 °C) and second that this hydrothermal alteration occurred at a depth of less than 2 km. We highlight, at shallow crustal depths, the record of both vertical and lateral fluid pathways in the studied volcanic arc. Finally, combining this new dataset with the large number of published surface data obtained in the active geothermal system of Bouillante, we propose a conceptual scheme for the studied fossil reservoir to document the roots of magmatic arc-related active geothermal systems and to introduce new perspectives for deep geothermal exploration.

我们介绍了对在 Terre-de-Haut 岛（瓜德罗普群岛）确定的挖掘热液系统进行的综合结构、岩石学、矿物学和地球化学调查。这项工作首次证明了韧性剪切带的出现，其标志是压力溶解过程产生的间隔片理面的发展。我们首先阐明，间隔片理的发展与高温热液作用（约 350 °C）同时发生，其次，这种热液蚀变发生在不到 2 公里的深度。我们强调，在浅地壳深度，研究的火山弧中垂直和横向流体路径的记录。最后，将此新数据集与在 Bouillante 活动地热系统中获得的大量已发布地表数据相结合，