Dynamics and genesis of calcic accumulations in soils and sediments of the Argentinean Pampa

作     者：Alsu Kuznetsova Olga Khokhlova 

作者机构：Department of Renewable resourcesUniversity of Alberta Edmonton Institute of Physicochemical and Biological Problems of Soil Science RAS Puschino 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2015年第30卷第3期

页      面：179-189页

核心收录：

学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：We sincerely thank Dr. M. Osterrieth for organization of the field trip and providing some samples 

主　　题：Carbonate accumulations Gypsum accumulations Pedogenic rhizoliths Tosca 

摘      要：Micromorphology of calcic accumulations(calcite,whewellite and gypsum) and geochemical indices were considered as indicators of genesis and evolution of pedogenic accumulations in soils and paleosediments of the Argentinean *** groups of separate and independent calcic accumulations were studied using scanning electron microscopy:(i) in situ Argiudolls,reflecting the current soil formation;(ii) in the layers of calcrete(locally named tosca).reflecting the past environments and conditions of these layers *** pedogenic gypsum accumulations in Argiudolls were described and possible ways of their formation were *** analyses of morphology of carbonate accumulations and geochemical indices in different horizons of Argiudolls and layers of tosca showed that the tosca is paleopedocomplex with complicated formation *** of current environment on tosca morphology is absent,so it is possible to use these pedofeatures for paleoreconstructions in further studying.