Types of Occurrence of Nontronite and Nontronite-like Minerals in Soils

dc.contributor.author Sherman, G.D.
dc.contributor.author Ikawa, Haruyoshi
dc.contributor.author Uehara, Goro
dc.contributor.author Okazaki, Ernest
dc.date.accessioned 2009-02-12T07:05:18Z
dc.date.available 2009-02-12T07:05:18Z
dc.date.issued 1962-01
dc.description.abstract Nontronite, the iron-rich dioctahedral mineral of the montmorillonite group, is rarely found in soils. A number of montmorillonite clays having a high content of iron oxide have been found in subsoils. These occurrences are located at Toowoomba, Queensland, Australia; Waipata, South Island, New Zealand; Molumolu, Fiji; and at a number of sites in the Hawaiian Islands. These clays occur as relatively pure mineral aggregates and therefore are well segregated from their matrix. The type of occurrence provided material of homogeneous chemical and mineral compositions. The iron oxide content of these clays ranged from 9 to 32 per cent and indicates a wide range of iron substitution in the octahedral position. These clays occur under a wide range of climatic conditions, as evidenced by rainfall variation of 13 to 120 inches per year. Likewise, they occur in both early and late stages of weathering and, because of that, they occur in different mineral associations of primary minerals, other 2: 1 clays, kaolin, iron oxides, and bauxite.
dc.identifier.citation Sherman GD, Ikawa H, Uehara G, Okazaki E. 1962. Types of occurrence of nontronite and nontronite-like minerals in soils. Pac Sci 16(1): 57-62.
dc.identifier.issn 0030-8870
dc.identifier.uri http://hdl.handle.net/10125/5977
dc.language.iso en-US
dc.publisher University of Hawai'i Press
dc.title Types of Occurrence of Nontronite and Nontronite-like Minerals in Soils
dc.type Article
dc.type.dcmi Text
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