Geothermal Energy

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Table 1 Permeability properties of fracture zones detected in the Muschelkalk and Buntsandstein formations

From: How do permeable fractures in the Triassic sediments of Northern Alsace characterize the top of hydrothermal convective cells? Evidence from Soultz geothermal boreholes (France)

	GPK-2	GPK-3	GPK-4
Muschelkalk
Z1	Permeable	Permeable
Z2	Permeable	Permeable	Permeable
Z3	Sealed	Sealed
Buntsandstein
Z4		Sealed	Partly sealed
Z5	Sealed
Z6	Sealed	Sealed	Sealed
Z7	Sealed		Permeable
Z8	Sealed	Sealed	Sealed
Z9	Permeable	Permeable	Partly sealed

In the geothermal boreholes GPK-2, GPK-3, and GPK-4

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