Environmental influences on the occurrences of sepiolite and palygorskite: a brief review
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Abstract
Sepiolite is a hydrous magnesium silicate formed by precipitation of near-surface brackish or saline waters, under semi-arid climatic conditions. Four major influences on the distribution of sepiolite are source materials, climate, physical parameters and associated phase relations. Two major pathways governing the occurrence of sepiolite and palygorskite are direct precipitation from solution, and the transformation of precursor phases by dissolution–precipitation. Sepiolite is most commonly found as a result of the former process, whereas palygorskite is often characterized as a product of the latter. Thus, sepiolite typically occurs in lacustrine, often saline, strata, while palygorskite is commonly found in conjunction with soils, alluvium, or most abundantly, calcretes. Here, we review briefly some examples of sepiolite deposits in Spain, Turkey, Argentina, USA, and the African countries of Kenya, Morocco, Tunisia, Senegal, Somalia and South Africa.
Suggested Citation
Jones, B.F., Conko, K.M., 2011, Environmental influences on the occurrences of sepiolite and palygorskite: a brief review, chap. of Developments in Clay Science, v. 3, p. 69-83, https://doi.org/10.1016/B978-0-444-53607-5.00003-7.
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | Environmental influences on the occurrences of sepiolite and palygorskite: a brief review |
| ISBN | 9780444536075 |
| DOI | 10.1016/B978-0-444-53607-5.00003-7 |
| Volume | 3 |
| Year Published | 2011 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | National Research Program |
| Description | 15 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Other Government Series |
| Larger Work Title | Developments in Clay Science |
| First page | 69 |
| Last page | 83 |