Browsing by Subject "Weathering"

Browsing by Subject "Weathering"

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  • Clays and Clay Minerals, Vol. 54, No. 1, 87-100, 2006. 
    Caillaud, J.; Proust, D.; Righi, D. (The Clay Minerals SocietyThe Clay Minerals Society, 2006)
    Under closed geochemical conditions, the weathering of a serpentinite rock composed of serpentine (70-85%) and magnesian chlorite (10-15%) associated with magnetite and chromite leads to the complete replacement of serpentine ...
  • Clays and Clay Minerals, Vol. 54, No. 3, 351-362, 2006. 
    Proust, D.; Caillaud, J.; Fontaine, C. (The Clay Minerals SocietyThe Clay Minerals Society, 2006)
    The early stages of amphibole weathering result in the crystallization of several clay mineral species: tri- and dioctahedral smectites, interstratified dioctahedral kaolinite-smectite (K-S), and halloysite. Each clay ...
  • Clays and Clay Minerals, Vol. 54, No. 6, 703–720, 2006. 
    Zanelli, R.; Egli, M.; Mirabella, A.; Abdelmoula, M.; Plotze, M.; Notzli, M. (The Clay Minerals SocietyThe Clay Minerals Society, 2006-11)
    Many soils in southern Switzerland have a black color, contain a large amount of soil organic matter (SOM) and seem to have some andic properties although they did not develop on volcanic parent material. We investigated ...
  • Clays and Clay Minerals, Vol. 55, No. 6, 565–571, 2007. 
    Cho, Yunchul; Komarneni, Sridhar (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    The weathering stages of K-depleted biotite, K-depleted phlogopite, and natural biotite were investigated using hydrothermalt reatment with AlCl3 solution at 200ºC for 12 to 72 h. Although there were some differences in ...
  • Clays and Clay Minerals, Vol. 56, No. 1, 112–127, 2008. 
    Velbel, Michael A.; Barker, William W. (The Clay Minerals SocietyThe Clay Minerals Society, 2008)
    Air-dried and high-pressure frozen/freeze-etched samples of clinopyroxene and smectite in a saprolitized clinopyroxenite from Koua Bocca, Ivory Coast, West Africa, were compared to characterize textures developed during ...
  • Clays and Clay Minerals, Vol. 57, No. 5, 602–615, 2009. 
    Hong, Hanlie; Li, Zhaohui (The Clay Minerals Society, 2009)
    In spite of many studies of laterite origins in various parts of the world, the origin of laterite in the middle to lower reaches of the Yangtze River is still a topic of debate, thus leaving doubts about the prevailing ...
  • Clays and Clay Minerals, Vol. 58, No. 2, 220–237, 2010. 
    Churchman, Gordon Jock; Pontifex, Ian Russell; Mcclure, Stuart Gerrand (The Clay Minerals SocietyThe Clay Minerals Society, 2010)
    The occurrenceof halloysite and/or kaolinitein clay-rich, vein-likezone s in saprolites in Hong Kong has provided theopportunit y to examinetheconditions determining theformation of onekaolin mineral or the other and also ...
  • Clays and Clay Minerals, Vol. 58, No. 6, 772–782, 2010. 
    Baker, Leslie L.; Strawn, Daniel G.; Vaughan, Karen L.; Mcdaniel, Paul A (The Clay Minerals SocietyThe Clay Minerals Society, 2010)
    The characterization of poorly crystalline minerals formed by weathering is difficult using conventional techniques. The objective of this study was to use cutting-edge spectroscopic techniques to characterize secondary ...
  • Clays and Clay Minerals, Vol. 58, No. 6, 783–791, 2010. 
    Murphy, David M. K.; Gilkes, Robert J. (The Clay Minerals SocietyThe Clay Minerals Society, 2010)
    Differentiating clay minerals that formed in a supergene environment during deep chemical weathering from those that formed during hydrothermal alteration at higher temperatures associated with a mineralizing event is ...
  • Clays and Clay Minerals, Vol. 60, No. 1, 76–88, 2012. 
    Pestitschek, Brigitte; Gier, Susanne; Essa, Mahmoud; Kurzweil, Hans (The Clay Minerals SocietyThe Clay Minerals Society, 2012)
    Recognizing weathering effects is significant for any work carried out on glauconites at the surface. The mineralogy and chemistry of glauconite grains exposed to weathering in a hot arid climate for a maximum of 42 y were ...