test_moissonnage_selune
type: Agent

Genesis of a mottled horizon by Fe-depletion within a laterite cover in the Amazon Basin.
type: Distribution
access URL: https://insu.hal.science/hal-00077598
format: HTML
issued: 2026-05-15T07:29:30.100373
modified: 2026-05-15T07:29:30.036190

Genesis of a mottled horizon by Fe-depletion within a laterite cover in the Amazon Basin.
type: Dataset
contact point: Organization
  fn: CCSD
keyword: plinthic-cambisol
keyword: infoeu-reposemanticsarticle
keyword: brazil
keyword: sdustugcsciences-of-the-universe-physicsearth-sciencesgeochemistry
keyword: journal-articles
keyword: scanning-electron-microscopy
keyword: sdemcgenvironmental-sciencesglobal-changes
keyword: iron
keyword: quantitative-chemical-microprobe
keyword: microscopy
landing page: 1631-0713
description: A mottled horizon in a laterite cover (without any duricrust) was studied by microscopy and quantitative chemical microanalysis. Apart from the voids, light red spots consisting of Fe-rich particles (≈2 μm) are set in clayey plasma. Dark red spots consisted of concentrations of Fe-rich particles. These patterns are inherited. On the border of structural or biological voids, where Fe-depletion features are systematic, gray or yellow spots result from dissolution of the Fe-rich particles and impregnation of the plasma by iron, respectively. The present Fe-depletion is the dominant process that explains the mottled differentiation and the absence of lateritic duricrust.
issued: 2026-05-15T07:29:30.073511
language: en
modified: 2026-05-15T07:29:30.073516