RESISTIVITAS BATUAN DAN MINERAL (1)

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RESISTIVITAS BATUAN DAN MINERAL

Tabel 1. Resistivitas Batuan Beku dan Metamorf (Telford, dkk., 1976)

Rock Type Resistivity Range (Ωm)

Granite

Granite Porphyry Feldspar Porphyry Albite

Syenite Diorit

Diorit Porphyry Porphyryte

Carbonatized Porphyry Quartz Porphyry Quartz Diorite Porphyry (Various) Dacite

Andesite

Diabase Porphyry Diabase (various) Lavas

Gabbro Basalt

Olivine Norite Peridotite Hornfels

Schists (calcareous and mica) Tuffs

Graphite Schist Slates (various) Gneiss (various) Marble

Skarn

Quarzites (various)

3 x 102_{- 10}6

4.5 x 103_{(wet) – 1.3 x 10}6_(dry)

4 x 103_(wet)

3 x 102_{(wet) – 3.3 x 10}3_(dry)

102_{- 10}6

104_{- 10}5

1.9 x 103_{(wet) – 2.8 x 10}4_(dry)

10 – 5 x 104_{(wet) – 3.3 x 10}3_(dry)

2.5 x 103_{(wet) – 6 x 10}4_(dry)

3 x 102_{– 9 x 10}5

2 x 104_{– 2 x 10}6_{(wet) – 1.8 x 10}5_(dry)

60 - 104

2 x 104_(wet)

4.5 x 104_{(wet) – 1.7 x 10}5_(dry)

103_{(wet) - 1.7 x 10}5_(dry)

20 – 5 x 107

102_{– 5 x 10}4

103_{- 10}6

10 – 1.3 x 107_(dry)

103_{– 6 x 10}4_(wet)

3 x 103_{(wet) – 6.5 x 10}3_(dry)

8 x 103_{(wet) – 6 x 10}7_(dry)

20 - 104

2 x 103_{(wet) - 10}5_(dry)

10 - 102

6 x 102_{– 4 x 10}7

6.8 x 104_{(wet) – 3 x 10}6_(dry)

102_{– 2.5 x 10}8_(dry)

2.5 x 102_{(wet) – 2.5 x 10}8_(dry)

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Tabel 2. Resistivitas Batuan Sedimen (Telford, dkk., 1976)

Rock Type Resistivity Range (Ωm)

Consolidated Shales Argillites

Conglomerates Sandstones Limestones Dolomite

Unconsolidated Wet Clay Marls

Clays

Alluvium and Sands Oil Sands

20 – 2 x 103

10 – 8 x 102

2 x 103_{- 10}4

1 – 6.4 x 108

50 - 107

3.5 x 102_{– 5 x 10}3

20 3 – 70 1 – 100 10 – 800 4 - 800

Tabel 3. Resistivitas logam dan Unsur (Telford, dkk., 1976)

Logam/Unsur Resistivity (Ωm)

Range Average

Antimony Arsenic Bismuth Copper Gold Graphite Iron Lead Mercury Molybdenum Nickel Platinum Silver Sulphur Tellurium Tin Uranium Zinc

5 x 10-7_{– 10}

107_{- 10}16

10-4_{– 2 x 10}-3

4.5 x 10-7

2.2 x 10-7

1.2 x 10-6

1.7 x 10-8

2.4 x 10-8

10-3

10-7

2.2 x 10-7

9.6 x 10-7

5.7 x 10-8

7.8 x 10-8

10-7

1.6 x 10-8

1014

10-3

1.1 x 10-7

3 x 10-7

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Tabel 4. Resistivitas Mineral (Telford, dkk., 1976)

Mineral Resistivity (Ωm)

Range Average

Argentite Bismuthinite Covellite

Tabel 5. Harga Resistivitas Spesifik Batuan (Suyono, 1978)

Material Resistivitas (Ωm)

Air Pemasukan Airtanah Silt – Lempung Pasir

Pasir dan kerikil Batu Lumpur Batu pasir Konglomerat Tufa

Kelompok Andesit Kelompok Granit Kelompok Chert, Slate