Secondary minerals from extrapedogenic per latus acidic weathering environments at geomorphic edges, Eastern Nebraska, USA

R. M. Joeckel, K. D. Wally, B. J.Ang Clement, P. R. Hanson, J. S. Dillon, S. K. Wilson

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Acidic weathering of the sulfidic Upper Cretaceous Carlile and Pierre Shales in Nebraska has led to the precipitation of the Al sulfate-hydroxide minerals aluminite, alunite, "basaluminite"/felsöbányaite (e.g.,), the aluminum hydroxides gibbsite and bayerite, and the rare Al phosphate hydroxide vashegyite. Kaolinite has also been produced as a result of this acidic weathering. These minerals do not appear as neoformed constituents in any extant soils in the region, and their existence underscores the ability of pyrite oxidation to produce major changes in mineralogy on a Holocene to Recent time scale. Jarosite, hydronium jarosite, gypsum, halotrichite, and melanterite also appear as secondary minerals in the weathered shales. Acidic weathering and the formation of new minerals is extrapedogenic because it occurs well below the limit of modern soil sola. These processes also occur at the edges of major landscape elements and can be considered to have a strong lateral component processes, making them ". per latus" processes in our usage.

Original languageEnglish (US)
Pages (from-to)253-266
Number of pages14
JournalCatena
Volume85
Issue number3
DOIs
StatePublished - Jun 1 2011

Fingerprint

secondary mineral
hydroxide
jarosite
weathering
bayerite
alunite
gibbsite
new mineral
mineral
gypsum
kaolinite
pyrite
mineralogy
soil
aluminum
phosphate
Holocene
sulfate
Cretaceous
timescale

Keywords

  • "Basaluminite"/felsöbányaite
  • Aluminite
  • Alunite
  • Gibbsite
  • Pyrite oxidation
  • Vashegyite

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Secondary minerals from extrapedogenic per latus acidic weathering environments at geomorphic edges, Eastern Nebraska, USA. / Joeckel, R. M.; Wally, K. D.; Clement, B. J.Ang; Hanson, P. R.; Dillon, J. S.; Wilson, S. K.

In: Catena, Vol. 85, No. 3, 01.06.2011, p. 253-266.

Research output: Contribution to journalArticle

Joeckel, R. M. ; Wally, K. D. ; Clement, B. J.Ang ; Hanson, P. R. ; Dillon, J. S. ; Wilson, S. K. / Secondary minerals from extrapedogenic per latus acidic weathering environments at geomorphic edges, Eastern Nebraska, USA. In: Catena. 2011 ; Vol. 85, No. 3. pp. 253-266.
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