Iron oxide precipitate in seepage of groundwater from a landslide slip zone

Guodong Zheng, Yuhua Lang, M. Miyahara, T. Nozaki, T. Haruaki

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Orange precipitate was collected at the mouth of groundwater drainage tubes from the Kumanashi Landslide slip zone in Toyama prefecture, Northwest Japan. Data from XRF, X-ray diffraction, and Mössbauer spectroscopy determined the precipitate as hydrous ferric oxide (HFO) bearing multi-elements such as phosphorous, silica, calcium, etc. The occurrence of HFO may indicate an oxidation of ferrous iron in the percolated groundwater from the slip zone. Moreover, the precipitate iron should be mobilized with groundwater circulation from the slip zone, whose reducing condition was determined by the iron speciation on the same type of landslide profiles within the study area in previous studies. The HFO precipitate may be considered as a secondary reliable indicator to locate the seepage of a slip zone on surface, especially for a landslide newly investigated under wet-warm climate.

Original languageEnglish
Pages (from-to)1455-1464
Number of pages10
JournalEnvironmental Geology
Issue number8
Publication statusPublished - 2007 Feb
Externally publishedYes


  • Hydrous ferric oxide
  • Japan
  • Kumanashi Landslide
  • Redox condition
  • Slip zone

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology
  • Pollution
  • Soil Science


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