How Do Secondary Minerals in Granite Help Distinguish Paleo- from Present-Day Permeable Fracture Zones? Joint Interpretation of SWIR Spectroscopy and Geophysical Logs in the Geothermal Wells of Northern Alsace

<div>(a) Structural map of the top of the granitic basement from the GeOrg geoportal with the well trajectories (green), the thermal anomalies [<a href="/journals/geofluids/2019/8231816/#B3">3</a>], and the Soultz (SsF) and Rittershoffen localizations. (b) Geological cross section through the GPK-1 and GRT-2 wells crossing the URG sedimentary cover and granitic basement; the well trajectory of the GRT-2 well is a NW-SE projection on the cross section, from the last 3D seismic campaign [<a href="/journals/geofluids/2019/8231816/#B72">72</a>].</div>

Geofluids

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Figure 2: How Do Secondary Minerals in Granite Help Distinguish Paleo- from Present-Day Permeable Fracture Zones? Joint Interpretation of SWIR Spectroscopy and Geophysical Logs in the Geothermal Wells of Northern Alsace 

Figure 2 | How Do Secondary Minerals in Granite Help Distinguish Paleo- from Present-Day Permeable Fracture Zones? Joint Interpretation of SWIR Spectroscopy and Geophysical Logs in the Geothermal Wells of Northern Alsace 