%0 Conference Proceedings
%9 ACTI : Communications avec actes dans un congrès international
%A Hidalgo, C.
%A Quantin, Paul
%A Elsass, F.
%T Caracterización mineralógica de los tepetates tipo fragipán del valle de México
%S Suelos volcanicos endurecidos
%C Quito (ECU) ; Quito (ECU) ; Quito (ECU) ; Quito
%D 1997
%E Zebrowski, Claude
%E Quantin, Paul
%E Trujillo, G.
%E Villamar, M.D.
%L fdi:010012913
%G SPA
%I UE ; ORSTOM ; PUCE ; UCE
%K SOL ; INDURATION ; CENDRE VOLCANIQUE ; PYROCLASTITE ; HORIZON ; MINERALOGIE ; METHODE D'ANALYSE
%K TEPETATE
%K MEXIQUE
%P 65-72
%U https://www.documentation.ird.fr/hor/fdi:010012913
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/divers2/010012913.pdf
%W Horizon (IRD)
%X The tepetates of Mexico Highlands are indurated horizons with fragipan pr0perties. Tepetates appear among pyroclastic deposits (T1, T2, T3). A soil profile located near Texcoco, Mexico, including tepetate layers was studied. Mineralogical and microscopical features of this profile were studied using a series of methods. This report the main results of the study. Tepetates were characterized by several features: first, the nature of their parent material; second, a close matrix microstructure and third, their colloidal fraction. The latter is conformed mainly by laminated 1:1 to 2:1 mixed layer minerals made of flaky layers. These features can explain the fragipan properties of tepetates and most of their mechanical behaviour. (Résumé d'auteur).
%B Suelos Volcanicos Endurecidos
%8 1996/12/9-14
%$ 068PROSOL