Fig. 10From: Physical property characterization of the Waipapa greywacke: an important geothermal reservoir basement rock in New ZealandGraphs of permeability against confining pressure through a single fracture (samples TTGW_11_3_5 (a) and TTGW_11_3_17 (b)). Red dashed line indicates where permeability becomes stable. Overlapped graphs 10a and 10b are shown as Additional file 2: Figure S2, Additional file 3Back to article page