Skip to main content
Geothermal Energy

Science – Society – Technology

Fig. 5 | Geothermal Energy

Fig. 5

From: Characterizing the physical properties of rocks from the Paleozoic to Permo-Triassic transition in the Upper Rhine Graben

Fig. 5

Backscatter electron microscope images of select rocks characterised in this study. Black space is porosity. a Sandstone (WPS) from Raon l’Etape. b Dolomite (WPD) from Raon l’Etape. c Sandstone (TAS) from Waldhambach. d Granite (WAG) from Saint Pierre Bois. e Sandstone (WAAG) from Saint Pierre Bois. f Metabasite (TPDG) from Albersweiler. g Breccia (TPSC) from Albersweiler. h Metagranite (TPG) from Albersweiler. i Hydrothermally altered Permian volcanics (TPV) from Albersweiler. pl plagioclase, qz quartz, chl chlorite, dol dolomite, cal calcite, mc microcline, bt biotite, ab albite, ilt illite, hbl hornblende

Back to article page