CV-3: Extensional Domain

GEOTHERMAL ENERGY

CV-3: Extensional Domain:

An extensional domain play is an area of high thermal gradients provided by an elevated mantle. This elevated mantle is caused by crustal extension and thinning.

Other definitions:Wikipedia Reegle

Moeck-Beardsmore Play Types

This classification scheme was developed by Moeck and Beardsmore, as reported in A New 'Geothermal Play Type' Catalog: Streamlining Exploration Decision Making.

• Convection-Dominated Geothermal Systems
  • Magmatic Geothermal Play Type
    • CV-1a: Extrusive
    • CV-1b: Intrusive
  • Plutonic Geothermal Play Type
    • CV-2a: Recent or Active Volcanism
    • CV-2b: Inactive Volcanism
  • CV-3: Extensional Domain
• Conduction-Dominated Geothermal Systems
  • CD-1: Intracratonic Basin
  • CD-2: Orogenic Belt
  • CD-3: Crystalline Rock - Basement

Badwater Basin in Death Valley, California, U.S.A. This area is below sea level due to crustal extension.

Crustal extension and thinning cause the mantle to become elevated. This elevated mantle results in a higher geothermal gradient within the crust. Meteoric water circulates through deep faults or permeable formations in the crust and becomes heated.

Typical faults formed by extension of the crust (ref: U.S. Geological Survey)

According to Moeck and Beardsmore, extensional domain geothermal plays typically have the following properties:

• Geologic Setting – Metamorphic Core Complexes, Back-arc Extension, Pull-apart Basins, Intracontinental Rifts
• Heat Source/Storage Properties of Reservoir – Thinned Crust+Elevated Heatflow, Recent Extensional Domains
• Dominant Heat Transport Mechanism – Fault Controlled, Hydrothermal Circulation

Examples

Want to add an example to this list? Select a Geothermal Resource Area to edit its "Moeck-Beardsmore Play Type" property using the "Edit with Form" option.

CSV

Geothermal Resource Area	Geothermal Region	Control Structure	Host Rock Age	Host Rock Lithology	Mean Capacity	Mean Reservoir Temp
Alasehir Geothermal Area	Aegean-West Anatolian Extensional Region				48 MW 48,000 kW 48,000,000 W 48,000,000,000 mW 0.048 GW 4.8e-5 TW	434.15 K 161 °C 321.8 °F 781.47 °R
Altheim Geothermal Area	Upper Austrian Molasse Basin		Jurassic	Limestone; Dolomites	1 MW 1,000 kW 1,000,000 W 1,000,000,000 mW 0.001 GW 1.0e-6 TW	373.15 K 100 °C 212 °F 671.67 °R
Bad Blumau Geothermal Area	Styrian Basin			Dolomite	0.25 MW 250 kW 250,000 W 250,000,000 mW 2.5e-4 GW 2.5e-7 TW	383.15 K 110 °C 230 °F 689.67 °R
Beowawe Hot Springs Geothermal Area	Central Nevada Seismic Zone Geothermal Region	Pull-Apart in Strike-Slip Fault Zone	Ordovician	shale; quartzite	17 MW 17,000 kW 17,000,000 W 17,000,000,000 mW 0.017 GW 1.7e-5 TW	483.15 K 210 °C 410 °F 869.67 °R
Blue Mountain Geothermal Area	Northwest Basin and Range Geothermal Region	Fault Intersection Intrusion Margins and Associated Fractures	Triassic	Metasedimentary	49.5 MW 49,500 kW 49,500,000 W 49,500,000,000 mW 0.0495 GW 4.95e-5 TW	470.15 K 197 °C 386.6 °F 846.27 °R
Brady Hot Springs Geothermal Area	Northwest Basin and Range Geothermal Region	Accommodation Zone	Mesozoic	metamorphic rocks	26.1 MW 26,100 kW 26,100,000 W 26,100,000,000 mW 0.0261 GW 2.61e-5 TW	455.15 K 182 °C 359.6 °F 819.27 °R
Bruchsal Geothermal Area	Upper Rhine Valley	Major Normal Fault	Triassic	Sandstone	0.6 MW 600 kW 600,000 W 600,000,000 mW 6.0e-4 GW 6.0e-7 TW	413.15 K 140 °C 284 °F 743.67 °R
Coso Geothermal Area	Walker-Lane Transition Zone	Pull-Apart in Strike-Slip Fault Zone	Mesozoic	granitic	300 MW 300,000 kW 300,000,000 W 300,000,000,000 mW 0.3 GW 3.0e-4 TW	571.15 K 298 °C 568.4 °F 1,028.07 °R
Desert Peak Geothermal Area	Northwest Basin and Range Geothermal Region	Stepover or Relay Ramp in Normal Fault Zones	Mesozoic	greenstone	23 MW 23,000 kW 23,000,000 W 23,000,000,000 mW 0.023 GW 2.3e-5 TW	481.15 K 208 °C 406.4 °F 866.07 °R
Dixie Valley Geothermal Area	Central Nevada Seismic Zone Geothermal Region	Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones	Jurassic	Basalt	62 MW 62,000 kW 62,000,000 W 62,000,000,000 mW 0.062 GW 6.2e-5 TW	504.15 K 231 °C 447.8 °F 907.47 °R
Fernley Geothermal Area	Northwest Basin and Range Geothermal Region				30 MW 30,000 kW 30,000,000 W 30,000,000,000 mW 0.03 GW 3.0e-5 TW	422.15 K 149 °C 300.2 °F 759.87 °R
Germencik Geothermal Area	Aegean-West Anatolian Extensional Region	Fault Intersection		Marble	73.4 MW 73,400 kW 73,400,000 W 73,400,000,000 mW 0.0734 GW 7.34e-5 TW	491.15 K 218 °C 424.4 °F 884.07 °R
Gumuskoy Geothermal Area	Aegean-West Anatolian Extensional Region	Fault Intersection	Paleozic	Marble	13.2 MW 13,200 kW 13,200,000 W 13,200,000,000 mW 0.0132 GW 1.32e-5 TW	413.15 K 140 °C 284 °F 743.67 °R
Hot Sulphur Springs Geothermal Area	Central Nevada Seismic Zone Geothermal Region				18 MW 18,000 kW 18,000,000 W 18,000,000,000 mW 0.018 GW 1.8e-5 TW	445.15 K 172 °C 341.6 °F 801.27 °R
Humboldt House Geothermal Area	Northwest Basin and Range Geothermal Region	Fault Controlled			0.3 MW 300 kW 300,000 W 300,000,000 mW 3.0e-4 GW 3.0e-7 TW	466.15 K 193 °C 379.4 °F 839.07 °R
Iwate Geothermal Area	Northeast Honshu Arc		Miocene; Pre-Tertiary	Dacitic welded tuff; Marine Sediments Tuffs; Shales; Chert; Slate; Granodiorite	103.5 MW 103,500 kW 103,500,000 W 103,500,000,000 mW 0.104 GW 1.035e-4 TW	578.15 K 305 °C 581 °F 1,040.67 °R
Kizildere Geothermal Area	Aegean-West Anatolian Extensional Region	Fault Intersection	Miocene	Limestone	102 MW 102,000 kW 102,000,000 W 102,000,000,000 mW 0.102 GW 1.02e-4 TW	459.15 K 186 °C 366.8 °F 826.47 °R
Klamath Falls Geothermal Area	Cascades Geothermal Region				1.8 MW 1,800 kW 1,800,000 W 1,800,000,000 mW 0.0018 GW 1.8e-6 TW	386.15 K 113 °C 235.4 °F 695.07 °R
Landau Geothermal Area	Upper Rhine Valley	Major Normal Fault			3.6 MW 3,600 kW 3,600,000 W 3,600,000,000 mW 0.0036 GW 3.6e-6 TW	413.15 K 140 °C 284 °F 743.67 °R
Langjiu Geothermal Area	Tibet Geothermal Region	Fault Controlled			1 MW 1,000 kW 1,000,000 W 1,000,000,000 mW 0.001 GW 1.0e-6 TW	377.15 K 104 °C 219.2 °F 678.87 °R
Lightning Dock Geothermal Area	Southern Basin and Range Geothermal Region	Fault Intersection		Paleozoic carbonate rocks and late Tertiary volcanic rocks	4.4 MW 4,400 kW 4,400,000 W 4,400,000,000 mW 0.0044 GW 4.4e-6 TW	443.15 K 170 °C 338 °F 797.67 °R
Mori Geothermal Area	Kuril-Kamchatka Arc	Caldera Rim Margins	Pre-Tertiary	Limestone	50 MW 50,000 kW 50,000,000 W 50,000,000,000 mW 0.05 GW 5.0e-5 TW	513.15 K 240 °C 464 °F 923.67 °R
Nagqu Geothermal Area	Tibet geothermal region				5.8 MW 5,800 kW 5,800,000 W 5,800,000,000 mW 0.0058 GW 5.8e-6 TW	388.15 K 115 °C 239 °F 698.67 °R
Neal Hot Springs Geothermal Area	Snake River Plain	Pull-Apart in Strike-Slip Fault Zone	Miocene	Basalt	33 MW 33,000 kW 33,000,000 W 33,000,000,000 mW 0.033 GW 3.3e-5 TW	429.15 K 156 °C 312.8 °F 772.47 °R
Pamukoren Geothermal Area	Aegean-West Anatolian Extensional Region				45 MW 45,000 kW 45,000,000 W 45,000,000,000 mW 0.045 GW 4.5e-5 TW	448.15 K 175 °C 347 °F 806.67 °R
Raft River Geothermal Area	Northern Basin and Range Geothermal Region	Fault Intersection	1- Archean; 2-Proterozoic	1- quartz monzonite; 2-schist; quartzite	13 MW 13,000 kW 13,000,000 W 13,000,000,000 mW 0.013 GW 1.3e-5 TW	468.15 K 195 °C 383 °F 842.67 °R
Romania Geothermal Area	Europe				0.5 MW 500 kW 500,000 W 500,000,000 mW 5.0e-4 GW 5.0e-7 TW	358.15 K 85 °C 185 °F 644.67 °R
Rye Patch Geothermal Area	Northwest Basin and Range Geothermal Region				12.5 MW 12,500 kW 12,500,000 W 12,500,000,000 mW 0.0125 GW 1.25e-5 TW	486.15 K 213 °C 415.4 °F 875.07 °R
Salavatli Geothermal Area	Aegean-West Anatolian Extensional Region	Major Normal Fault			58 MW 58,000 kW 58,000,000 W 58,000,000,000 mW 0.058 GW 5.8e-5 TW	444.15 K 171 °C 339.8 °F 799.47 °R
Salt Wells Geothermal Area	Northwest Basin and Range Geothermal Region				23.6 MW 23,600 kW 23,600,000 W 23,600,000,000 mW 0.0236 GW 2.36e-5 TW	466.15 K 193 °C 379.4 °F 839.07 °R
San Emidio Desert Geothermal Area	Northwest Basin and Range Geothermal Region				14.22 MW 14,220 kW 14,220,000 W 14,220,000,000 mW 0.0142 GW 1.422e-5 TW	426.15 K 153 °C 307.4 °F 767.07 °R
Soda Lake Geothermal Area	Northwest Basin and Range Geothermal Region		Miocene	pumice tuff	26.1 MW 26,100 kW 26,100,000 W 26,100,000,000 mW 0.0261 GW 2.61e-5 TW	452.15 K 179 °C 354.2 °F 813.87 °R
Steamboat Springs Geothermal Area	Walker-Lane Transition Zone	Fault Intersection	1- Cretaceous; 2- Pliocene-Pleistocene	1- granodiorite; 2- basaltic andesite	147 MW 147,000 kW 147,000,000 W 147,000,000,000 mW 0.147 GW 1.47e-4 TW	483.15 K 210 °C 410 °F 869.67 °R
Stillwater Geothermal Area	Northwest Basin and Range Geothermal Region	Accommodation Zone	Quaternary	sandstone	47.2 MW 47,200 kW 47,200,000 W 47,200,000,000 mW 0.0472 GW 4.72e-5 TW	447.15 K 174 °C 345.2 °F 804.87 °R
Thermo Hot Springs Geothermal Area	Northern Basin and Range Geothermal Region				10.3 MW 10,300 kW 10,300,000 W 10,300,000,000 mW 0.0103 GW 1.03e-5 TW	462.15 K 189 °C 372.2 °F 831.87 °R
Tuzla Geothermal Area	Aegean-West Anatolian Extensional Region	Fault Intersection			8 MW 8,000 kW 8,000,000 W 8,000,000,000 mW 0.008 GW 8.0e-6 TW	405.15 K 132 °C 269.6 °F 729.27 °R
Wabuska Hot Springs Geothermal Area	Walker-Lane Transition Zone Geothermal Region		Quaternary	gravels; sands	2.4 MW 2,400 kW 2,400,000 W 2,400,000,000 mW 0.0024 GW 2.4e-6 TW	403.15 K 130 °C 266 °F 725.67 °R
Wairakei-Poihipi Geothermal Area	Taupo Volcanic Zone	Fault Intersection	Quaternary	Volcaniclastic	352 MW 352,000 kW 352,000,000 W 352,000,000,000 mW 0.352 GW 3.52e-4 TW	483.15 K 210 °C 410 °F 869.67 °R
Wendel Geothermal Area	Walker-Lane Transition Zone Geothermal Region	Displacement Transfer Zone	Mesozoic	Granite, Granodiorite	3.8 MW 3,800 kW 3,800,000 W 3,800,000,000 mW 0.0038 GW 3.8e-6 TW	413.15 K 140 °C 284 °F 743.67 °R
Wild Rose Geothermal Area	Walker-Lane Transition Zone Geothermal Region	Fault Controlled			16 MW 16,000 kW 16,000,000 W 16,000,000,000 mW 0.016 GW 1.6e-5 TW	412.15 K 139 °C 282.2 °F 741.87 °R
Yangbajain Geothermal Area	Himalayan Mountain Range	Fault Intersection			24 MW 24,000 kW 24,000,000 W 24,000,000,000 mW 0.024 GW 2.4e-5 TW	478.15 K 205 °C 401 °F 860.67 °R