Geofluids / 2020 / Article / Fig 7

Research Article

Tectonic Record of Deformation in Intraplate Domains: Case Study of Far-Field Deformation in the Grands Causses Area, France

Figure 7

Petrography of the fault-related calcites (slickenfibre calcite). (a) Sketch of the slickenfibre calcite growth over time. Modified from Fagereng et al. [83]. The orientation of σ1 is associated with the set of figures (a–d). (b) Petrography of CA18J04-3 sample. This calcite sample comes from a strike-slip fault (site 11, Figure 2) and could not be dated. Its texture is both fibrous—with a medium and uniform degree of luminescence—and granular—with the presence of growth zonations and a relatively high degree of luminescence. The inclusion bands indicate the syntectonic nature of the sample. (c) Petrography of CA18J06-1 sample (reverse fault-related calcite, Table 2). Under cathodoluminescence, calcite is uniform with a medium degree of luminescence. The presence of inclusion bands, inclusion trails, and elongated grains indicate the syntectonic nature of the sample. (d) Petrography of CA18J05-1 sample (reverse fault-related calcite, Table 2). Its texture is granular with the presence of inclusion trails, and the degree of luminescence is relatively low and uniform.
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