Figure 7.
The image presents two scanning electron microscope images of mineral structures. The top image, labeled as (a), displays various mineral features at a magnification of three thousand times, with annotations identifying 'Rosette', 'ASG', and multiple instances of 'Quartz'. Each label is marked in red, helping to distinguish different structures within the micrograph. A scale bar indicating ten micrometres is included. The bottom image, labeled as (b), illustrates a mineral vein at a lower magnification of one thousand times, highlighting the 'ASR gel vein', also labeled in red. A scale bar indicating thirty micrometres is provided for reference. Both images showcase complex mineral formations under high-resolution imaging.Transformation of ASG into rosette crystals within a crack in granite mylonite (Hirono et al., 2016): (a) ASG is initially formed from crypto/microcrystalline quartz, then transitions to rosette crystals with interstitial pores; (b) a vein in which rosette crystals have formed only in limited regions is also shown