Table 3 Petrographic features of the tested sandstones by thin-section analysis
Sample | Composition | Texture | ||||
|---|---|---|---|---|---|---|
Primary minerals | Lithic fragments | Interstitial materials | Microstructure | Grain size range (Min–max, μm) | Shape | |
YG | Quartz, K-feldspar, mica | Siliceous rock, rhyolite, metamorphic argillaceous rock | Clay matrix, calcareous cement | Grain supported, Pore-filling cementation | 90–2000 | From sub-rounded to sub-angular |
DZ | Quartz, K-feldspar, plagioclase, mica | Siliceous rock, siltite, micrite, argillaceous rock, rhyolite | 20–350 | Sub-angular | ||
LS | Quartz, K-feldspar, plagioclase, mica | Siliceous rock, argillaceous rock, siltite, micrite, sericite slate | 16–710 | From sub-rounded to sub-angular | ||