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Table 2 Parametrization of the conceptual 2-D geological models

From: Temperature and pressure corrections applied to rock thermal conductivity: impact on subsurface temperature prognosis and heat-flow determination in geothermal exploration

Unit

Rock type

ρ

λ

H

p correction

T correction

Specific p/T corrections

Min

Max

Min

Max

Scenario A: magmatic/metamorphic section in the upper 7 km of crust

 A

Diorite

3000

2.2

1.2

Crystallinekk

rocksff

For unit A-H:

  

 B

Monzonite

2750

2.1

6.0

grtMI

felsicZH

  

 C

Granite

2630

3.0

4.0

  

 D

Paragns

2750

2.8

2.4

  

 E

Metagranite

2700

2.8

2.3

  

 F

Granite

2600

3.1

4.0

  

 G

Micasch

2700

3.4

2.7

  

 H

Phyllite

2800

2.3

2.8

  

 I

Basalt

2900

3.5

1.2

Mafic grnSP

metamZH

  

Scenario B: sedimentary section in the upper 7 km of crust

 

p correction

T correction

 A

gwke, sch, ls

2620

2.8

2.8

No correction

RocksFF

sedSO

lsZH

rocksFF

sedVS

 B

sst, sltst, mdst

2500

3.3

1.6

sedSO

sedVS

sedSO

 C

Salt

2150

4.9

0.4

sedSO

sedVS

None

saltZH

 D

mdst

2400

1.8

1.8

sedSO

sedVS

rocksFF

sedSO

 E

mdst, sltst

2500

2.6

1.6

sedSO

sedVS

sedSO

 F

ls, mrlst

2350

2.2

1.2

sedSO

lsZH

lsZH

 G

sst, mdst, sltst

2500

2.9

1.0

sedSO

sedVS

sedSO

 H

mrlst, ls

2100

2.2

1.3

sedSO

lsZH

lsZH

 I

cl, slt, sd

1700

2.0

1.0

sedSO

sedVS

sedSO

Basement of 2-D crustal models (identical for scenarios A and B, given from bottom to top)

 1 (7 km)

Mafic grn

3100

2.3

0.2

CrystallineKK

RocksFF

mafic grnSP

metamZH

mafic grnSP

mafic grnSP

 2 (3 km)

Felsic grn, igrn

2800

3.0

1.0

grtMI

felsicZH

felsic grnSP

felsic grnSP

 3 (5 km)

amph

2950

2.5

0.5

mafic grnSP

metamZH

amphSP

amphSP

 4 (5 km)

Dioritic gns

2800

2.2

1.0

grtMI

felsicZH

grtSP

felsicZH

 5 (3 km)

Granodioritic gns

2750

2.6

2.5

grtMI

felsicZH

grtSP

felsicZH

  1. Thermal conductivity (λ, in W m−1K−1), density (ρ, in kg m−3), heat production (H, in µW m−3), and the correction formula applied in the thermal simulations are given. The specific p/T-correction formula apply to scenario B only (see Fig. 7)
  2. amph amphibolite, cl clay, gns gneiss, grn granulite, grt granite, gwke greywacke, igrn intermediate granulite, ls limestone, mdst mudstone, metam metamorphic, mrlst marlstone, sch schist, sed sediments, sd sand, slt silt, sltst siltstone, sst sandstone