“List of countries by bentonite production”的意思、由来-开放百科全书

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List of countries by bentonite production

释义

List of producing countries
References
External links

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

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)
{{noflag}}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	India}} India	1,081,000^[1]
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	Macedonia}} Macedonia	20,353
26	Romania}} Romania	20,229
27	Pakistan}} Pakistan	20,000
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}} 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

1. ^http://ibm.nic.in/writereaddata/files/01192015114329IMYB_2013_Vol%20III_Bentonite%202013.pdf

External links

British Geological Survey World Mineral Statistics

2 : Bentonite|Lists of countries by mineral production

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