TR Europe Updated 2026-08-20

Turkey Geothermal Screening

Geothermal screening assessment identifies 12.5% prospective land reaching 185°C by 5.5 km depth in Turkey.

Key Geothermal Metrics

Land Reaching 185°C by 5.5 km Moderate
12.5%

Primary baseline screening criterion

Shallowest Depth to 200°C Shallow
4.4 km

Minimum drill depth for high enthalpy

Peak Temperature at 5 km Depth Commercial EGS
244.6 °C

Maximum modeled temperature

Typical Geothermal Gradient Elevated
43.3 °C/km

Average to 5 km depth (15°C surface)

Grid Connectable Prospective Area Moderate Distance
78.4%

Hot territory within 50 km transmission

Stored Heat In-Place (3–7 km) 1 ZJ = 10²¹ Joules
256.2 ZJ

Thermal volume in place (>80°C baseline)

Depth vs. Temperature Matrix (% Land Area)

Proportion of national territory exceeding target isotherm at specified depth

0.1° Inversion Grid
Isotherm 3.0 km 4.0 km 5.0 km 6.0 km 7.0 km 8.0 km
150°C 2.9% 6.9% 10.6% 13.6% 20% 21%
175°C 3.2% 6.3% 9.3% 12.7% 16.2% 21.2%
200°C 2% 4.6% 7.6% 10.6% 13.5% 14.9%
225°C 1.7% 3% 4.8% 6.9% 9% 10.5%
250°C 0.9% 1.9% 3.3% 5% 5.8% 7%

4-Stage Geothermal Resource & Infrastructure Funnel

Progressive screening from gross national territory down to grid-connected & populated prospective zones

1 Whole country
783 562 km² 100%
2 Reaches 185°C by 5.5 km
97 945 km² 12.5%
3 ...and within 50 km transmission
76 789 km² 9.8%
4 ...and within 100 km town
66 898 km² 8.8%

Geological Setting & Subsurface Parameters

Lithology, basement thickness, stress and thermal boundary constraints

Median Depth to 200°C Isotherm 6.3 km
Best 10th Percentile Depth to 200°C 5.4 km
Median Temperature at 5 km Depth 183 °C
Best 10th Percentile Temp at 5 km 208.9 °C
Median Sediment Thickness 1.6 km
Sediment / Hard-Rock Well Share 36.1%
Territory Under 1 km Sediment Cover 48.4%
Lithostatic Pressure at 5 km Depth 134.8 MPa
Moho Crustal Discontinuity Depth 36.6 km
Thermal Lithosphere Thickness 88.4 km
Curie Temperature Isotherm Depth 24.1 km
Model Temperature Spread Uncertainty (200°C) ±0.7 km

Transmission Grid & Demand Colocation

Infrastructure interconnectivity and urban power demand proximity

High-Voltage Transmission Network Length 22 316 km
Land Area Within 25 km of Grid 66.4%
Land Area Within 50 km of Grid 78.4%
Land Area Within 100 km of Grid 83.4%
Average Proximity to Nearest Substation / Line 9.9 km
Urban Centers (>10,000 Population) 126
Total Urban Population 35.9 M
Prospective Resource Colocated Near Demand (>1M Pop) 24.5%

Target Sensitivity & Deep EGS Upside

Sensitivity of prospective resource area to adjusted depth and temperature thresholds

150°C Baseline at 5.5 km 20% of national territory reaches 150°C at 5.5 km depth
185°C Baseline at 7.5 km 22.5% of national territory reaches 185°C at 7.5 km depth

Global Peer Benchmarking (vs. 278 Assessed Jurisdictions)

Relative ranking distribution of Turkey across 11 standardized geothermal indicators

Turkey Rank Global Peer Spread
Shallowest 200°C depth
4.4 km Middle 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 51th percentile
Peak temp at 5 km
244.6 °C Middle 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 58th percentile
Prospective land area (>185°C at 5.5 km)
12.5% Lower 25%
P0 (Lowest) P50 (Median) P100 (Highest) • 21th percentile
Stored heat in-place (3-7 km)
256.2 ZJ Top 25%
P0 (Lowest) P50 (Median) P100 (Highest) • 75th percentile
Typical geothermal gradient
43.3 °C/km Middle 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 62th percentile
Grid proximity (<50 km)
78.4% Top 25%
P0 (Lowest) P50 (Median) P100 (Highest) • 78th percentile
Thin sediment coverage (<1 km)
48.4% Lower 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 48th percentile
Curie isotherm depth
24.1 km Lower 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 47th percentile
Moho crustal thickness
36.6 km Lower 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 34th percentile
Model temperature uncertainty spread
±1.3 km Middle 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 79th percentile
Urban demand colocation
52.4% Top 25%
P0 (Lowest) P50 (Median) P100 (Highest) • 75th percentile
Asset-Level 3D Simulation Available

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Analytical Geothermal Assessment & Discussion: Turkey

Subsurface thermal interpretation, model uncertainty, infrastructure colocation, and resource quality analysis

Resource Overview

Geothermal assessment for Turkey indicates extensional_basin geological controls governing subsurface heat transport, yielding 12.5% of land area reaching the baseline target of 185°C at 5.5 km depth.

Uncertainty & Model Variance

Thermal inversion across Turkey shows consistent model convergence with constrained standard deviations across deep crustal layers.

Grid & Infrastructure Colocation

National electrical transmission coverage positions approximately 78.4% of prospective geothermal ground within 50 km of existing high-voltage corridors.

Geological & Basement Setting

Subsurface lithology is characterized by extensional basin dynamics with median sediment thickness of 1.6 km and crustal thickness of 36.6 km.

Stored Heat Volume

Accessible thermal energy in place between 3 km and 7 km depth above 80°C totals 256.2 Zettajoules (ZJ).

Peer Comparison

Benchmarked against 237 global assessment jurisdictions, Turkey demonstrates competitive positioning across heat flow, infrastructure, and basement competence indicators.

Target Sensitivity Analysis

Screening at 150°C baseline at 5.5 km increases prospective territory, demonstrating substantial deep EGS resource headroom.

Screening Methodology, Parameters & Limitations

This screening assessment for Turkey is generated from Geothermal Radar Data Pack 2026.1 utilizing global 0.1° hex-grid thermal inversion across 8 706 model cells (land area: 783 562 km²). Baseline prospective criterion is defined as reaching 185°C at or above 5.5 km depth with surface temperature normalized to 15°C.

  • Screening estimates represent regional-scale heat in place and do not replace localized 3D seismic or exploratory drilling.
  • Model uncertainties expand in regions with sparse deep boreholes and complex thrust fault kinematics.
  • Grid proximity indicators reflect line-of-sight distance to high-voltage transmission and do not account for local substation thermal capacity.
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