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Table 1 Tabulated heat production and heat flow borehole measurements in SW England, from Wheildon et al. (1981) and Thomas-Betts et al. (1989)

From: The Cornubian geothermal province: heat production and flow in SW England: estimates from boreholes and airborne gamma-ray measurements

Easting (m) Northing (m) Name Code DEP (m
)
HP (μW m−3) HP SD (μW m−3) HF (Lee 1986) (mW m−2) Raw HF (mW m−2) Palaeoclimate correction (mW m−2) Topographic correction (mW m−2) HF REV mW m−2)
167,950 38,460 Grillis farm C-A 100 4.5 0.5 112.9 88.5 25.6 2.8 116.9
169,270 36,630 Polgear beacon C-B 100 3.8 0.9 121.7 108.8 26.3 3.7 138.8
170,830 34,040 Medlyn farm C-C 100 3.4 0.8 113.4    
171,850 31,800 Trevease farm C-D 100 3.8 0.5 111.9 91.5 25.5 2.5 119.5
173,530 30,330 Trerghan Farm C-E 100 4.4 1.2 112.9 94.3 25.9 0.1 120.3
165,700 36,770 Troon T 122 NA NA 122.7 114.7 26.1 −2.8 138.0
173,520 34,560 Rosemanowes A R-A 303 NA NA 105.5 101.6 16.3 −1.7 116.2
173,520 34,600 Rosemanowes D R-D 292 NA NA 106.4 102.3 16.5 −1.4 117.4
173,680 34,620 Longdowns L 182 3.6 NA 111.7 107.7 19.7 −3.0 124.4
166,800 41,050 South Crofty Mine SCM 650 5.3 NA 128.9    
219,070 81,770 Bray Down B-A 100 5.2 1.8 113.4 89.4 26.0 5.9 121.3
218,350 78,200 Blackhill B-B 100 3.1 0.5 119.0 98.0 25.1 3.7 126.8
218,920 74,500 Pinnockshill B-C 100 3.5 0.8 120.7 96.8 24.2 3.6 124.6
219,240 72,470 Browngelly B-D 100 5 0.8 108.4 88.3 25.6 3.4 117.3
218,850 69,860 Gt Hammett Farm B-E 100 4.3 1 118.8 97.0 25.6 3.6 126.2
146,080 34,350 Newmill L-A 100 4.9 0.8 123.8 101.5 26.3 3.8 131.6
140,220 27,260 Bunker’s Hill L-B 100 5.2 0.7 123.9 105.2 26.0 2.0 133.2
137,500 34,500 Geevor Mine   403 6.5 NA 128.6    
205,530 59,450 Tregarden Farm S-A 100 3.5 0.6 125.8 101.5 24.8 2.3 128.6
206,790 57,630 Colcerrow Farm S-B 100 4.8 0.7 126.5 104.9 27.4 5.5 137.8
261,170 91,560 Winter Tor D-A 100 5.7 1.3 107.4 79.8 25.5 11.5 116.8
278,500 85,930 Blackingstone D-B 100 4.9 0.6 105.5 85.6 25.0 3.9 114.5
267,330 79,710 Soussons Wood D-C 100 5 2 132.2    
265,620 75,490 Laughter Tor D-D 100 5.9 1.1 114.2 87.9 26.3 6.5 120.7
256,630 73,340 Foggin Tor D-E 100 4.9 1.1 110.9 85.0 27.3 3.4 115.7
257,330 58,490 Hemerdon H 128 NA NA 107.9    
165,590 43,510 Old Merrose Farm O-1 100 1.9 0.3 84.1    
175,330 25,790 Kestle Wartha O-2 150 1.8 0.4 102.5    
208,860 67,830 Callywith Farm O-3 150 2.2 0.1 106.2    
178,140 60,160 Treago Farm HF-1 295 1.98 0.26 84    
180,390 57,490 Gwinear Farm HF-2 295 1.9 0.21 96    
185,070 50,180 Trevispean Vean HF-3 295 1.58 0.27 95    
187,470 46,940 Tregerrick HF-4 295 1.93 0.17 95    
190,250 39,440 Crugsillick Manor HF-5 295 1.89 0.27 69     
  1. Heat flow estimates, as originally reported by Lee (1986) and Lee et al. (1987), are listed as HF (Lee 1986) and were corrected for recent climate change and topography. The revised heat flow estimates (HF REV) from this study are compiled from a newly calculated Raw HF, a full palaeoclimate correction and a topographic correction from Wheildon et al. (1981). The final eight sites are off-granite locations. Grid coordinates (m) are British National Grid
  2. DEP depth, HP heat production, SD standard deviation, HF heat flow, NA heat production measurements that are not available