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Table 1 Arsenic concentrations of rocks and sediments

From: Arsenic cycling in the Earth’s crust and hydrosphere: interaction between naturally occurring arsenic and human activities

Rock type

Average As concentration (mg/kg)

Range of concentration (mg/kg)

Igneous rock

 Basalt

2.3

0.18–113

 Andesite

2.7

0.5–5.8

 Granite

1.3

0.2–15

Metamorphic rock

 Slate

18

0.5–143

Sedimentary rock, sediments

 Shale/submarine shale

3–15

< 490

 Marine sedimentsa

14

0~580

 Sandstone

4.1

0.6–120

 Limestone/dolomite

2.6

0.1–20.1

 Evaporite

3.5

0.1–10

 Ferrigenous sedimentary rocks

 

1–2900

 River and lake sediments

5

< 1–13,000

 Soli

 

0.4–100

 Peaty soil

13

2–36

 Coal

 

0.3–35,00

  1. Edited data from Boyle and Jonasson (1973) and Smedley and Kinniburgh (2002)
  2. aCoastal area of Japan Islands, AIST https://gbank.gsj.jp/geochemmap/ocean/data/ganyuryo/ocean-noudo.csv