کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4712280 1638100 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamics and genesis of calcic accumulations in soils and sediments of the Argentinean Pampa
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Dynamics and genesis of calcic accumulations in soils and sediments of the Argentinean Pampa
چکیده انگلیسی

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 Pampa. Two 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 sedimentation. New pedogenic gypsum accumulations in Argiudolls were described and possible ways of their formation were suggested. Combined 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 history. Influence of current environment on tosca morphology is absent, so it is possible to use these pedofeatures for paleoreconstructions in further studying.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Sediment Research - Volume 30, Issue 3, September 2015, Pages 179–189
نویسندگان
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