Forms and Origin of Alumina in the A2 Horizon of the Tropical Podzols of Tahiti (French Polynesia)

Jamet, Rémi; Toutain, F.; Guillet, B.; Rambaud, Dominique

doi:10.1016/s0166-2481(08)70333-7

Cited by 2 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the most extremely weathered soils contain very little silica, and TiO2 increases to 8-18%, probably associated with the magnetite (Tercinier 1974). Various authors (Latham 1980(Latham -81,1983Jamet 1986;Jamet & Trichet 1987a;Jamet et al 1990), re-surveying what was known about soil development on volcanic ash in Pacific islands, showed that if the rainfall was >2000 mm/yr, clay formation was prevented because silica was almost completely leached away. An environment rich in Ca and Mg also prevented clay formation.…”

Section: G91017 Received 17 July 1992; Accepted 22 December 1992mentioning

confidence: 99%

The elemental content of Niue Island soils as an indicator of their origin

Whitehead

Hunt

Leslie

et al. 1993

New Zealand Journal of Geology and Geophysics

View full text Add to dashboard Cite

The major and trace element contents of 241 Niue Island lateritic soils were determined, mainly by X-ray fluorescence, to deduce soil origins. The analyses showed very low SiO 2 content, and a high content of Mg, P, V, Cr, Sr, Y, Hg, and α-counts, compared with other laterites worldwide. The distribution patterns are consistent with derivation by weathering from calcite and dolomite rather than from deposited volcanic ash. Weathering is a particularly novel explanation for the origin of the relatively high content of P in these soils. The soils contain a negative Ce anomaly, consistent with an origin from seawater or coral, but not volcanic ash. If recent results showing in situ formation of magnetite in soils are applicable, the soil mineralogy is wholly consistent with an origin from calcite/dolomite. An origin from calcite is also consistent with the relative lack of volcanic ash on the seabed nearby, and very low deposition of aeolian dust. The radioactivity content is consistent neither with calcite/dolomite weathering, nor volcanic ash origin, but may have originated, like a few of the stable elements, from rising hydrothermal solutions.

show abstract

Section: G91017 Received 17 July 1992; Accepted 22 December 1992mentioning

confidence: 99%