List of countries by bentonite production

From Wikipedia, the free encyclopedia
Jump to: navigation, search

Bentonite is an absorbent aluminium phyllosilicate generally impure clay consisting mostly of montmorillonite. There are a few types of bentonites and their names depend on the dominant elements, such as potassium, sodium, calcium, and aluminium. As noted in several places in the geologic literature, there are some nomenclatorial problems with the classification of bentonite clays.

Bentonite usually forms from weathering of volcanic ash, most often in the presence of water. However, the term bentonite, as well as a similar clay called tonstein, have been used for clay beds of uncertain origin. For industrial purposes, two main classes of bentonite exist: sodium bentonite and calcium bentonite.

In stratigraphy and tephrochronology, completely devitrified (weathered volcanic glass) ash-fall beds are commonly referred to as K-bentonites when the dominant clay species is illite. Other common clay species, and sometimes dominant, are montmorillinite and kaolinite. Kaolinite dominated clays are commonly referred to as tonsteins and are typically associated with coal.

List of producing countries[edit]

This is a list of countries by bentonite in 2006 mostly based on British Geological Survey accessed in June 2008.

Rank by
sovereign state
Country/Region Bentonite production (tonnes)
 World 14,600,000
1 United States United States 4,620,000
2 China China 3,200,000
3 Greece Greece 1,100,000
4 Turkey Turkey 600,000
5 Russia Russia 500,000
6 Italy Italy 470,000
7 Mexico Mexico 435,273
8 Brazil Brazil 419,214
9 Germany Germany 363,998
10 Argentina Argentina 256,165
11 Czech Republic Czech Republic 220,000
12 Iran Iran 186,323
13 Spain Spain 160,000
14 Cyprus Cyprus 150,620
15 Australia Australia 135,000
16 Bulgaria Bulgaria 134,500
17 Slovakia Slovakia 95,700
18 Poland Poland 93,880
19 South Korea South Korea 61,137
20 Azerbaijan Azerbaijan 40,600
21 South Africa South Africa 32,878
22 Algeria Algeria 27,110
23 Ukraine Ukraine 25,000
24 Bosnia and Herzegovina Bosnia and Herzegovina 24,050
25 Republic of Macedonia Macedonia 20,353
26 Romania Romania 20,229
27 Pakistan Pakistan 120,000
28 Vietnam Vietnam 20,000
29 Denmark Denmark 19,011
30 Croatia Croatia 16,410
31 Uzbekistan Uzbekistan 15,000
32 Peru Peru 14,590
33 Colombia Colombia 8,500
34 Hungary Hungary 6,635
35 Egypt Egypt 6,300
36 Nicaragua Nicaragua 6,300
37 Indonesia Indonesia 5,000
38 Georgia (country) Georgia 4,487
39 Philippines Philippines 3,600
40 New Zealand New Zealand 3,028
41 Thailand Thailand 1,200
42 Burma Burma 800
43 Armenia Armenia 720
44 Mozambique Mozambique 610

References[edit]

External links[edit]