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

Auteur(s) et Affiliation(s)

JOECKEL, R.M.

Fac. of Geology and Soils, Fac. of Geography, Conservation and Survey Div., School of Natural Resources, Univ. of Nebraska-Lincoln, Lincoln, Etats-Unis

Dep. of Earth and Atmospheric Sciences, Univ. of Nebraska-Lincoln, Lincoln, Etats-Unis

WALLY, K.D.

Waste Management Division, Dep. of Environmental Quality, State of Nebraska, Lincoln, Etats-Unis

ANG CLEMENT, B.J.

Dep. of Biology, Doane College, Nebraska, Crete, Etats-Unis

HANSON, P.R.

Fac. of Geology and Soils, Fac. of Geography, Conservation and Survey Div., School of Natural Resources, Univ. of Nebraska-Lincoln, Lincoln, Etats-Unis

DILLON, J.S.

Dep. of Geoography and Earth Science, Univ. of Nebraska-Kearney, Kearney, Etats-Unis

WILSON, S.K.

Northern Great Plains Inventory and Monitoring, Rapid City, Etats-Unis

Description :
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. This 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.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2011, vol. 85, n°. 3, p. 253-266, nombre de pages : 14, Références bibliographiques : 1 p.

Date :
2011

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais