The dregs of weathering: Secrets of kaolin and iron oxides in tropical soils
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منابع مشابه
کانی شناسی سطحی خاکهای سولفاته اسیدی ساحلی، در ناحیه شهری پینجارا، جنوب غربی استرالیا
Acid sulfate soils in Western Australia commonly occur in coastal regions. One of the greatest threats to coastal environment is the disturbance of acid sulfate soils due to urban development which can lead to widespread acidification of lands and streams and subsequent economic losses onsite or in adjacent areas. Surface sampling from different landforms of the study area and analytical result...
متن کاملMossbauer Spectra of Soil Kaolins from South-western Australia
-Six well-characterized soil kaolins from widely separated sites in south-western Australia and four reference kaolins were studied by 57Fe M6ssbauer spectroscopy at room temperature after removal of non-structurally-bound iron with dithionite-citrate-bicarbonate solution. The soil kaolins and one of the reference kaolins were also studied at temperatures near 16 K. The soil kaolins were remark...
متن کاملIron Removal from Kaolins by Bacterial Leaching
Weathering of rocks generated large volumes of kaolin clays, quartz sands and micas, as well as other minerals, especially iron and titanium oxides. Kaolin is an economically important raw material often used in wide variety of ceramic applications, from high quality tableware and sanitaryware to electrical porcelain, tiles and glasses. There are some less common uses including glass fibre, whi...
متن کاملThe Buwambo kaolin deposit in central Uganda: Mineralogical and chemical composition
Kaolin from the Buwambo deposit, located about 27 km north of Kampala (Uganda), has been analyzed for its mineralogical and chemical composition. The kaolin is derived from granite of the basement, which is exposed due to deeply weathered Buganda-Toro cover rocks. Kaolinite is the dominant mineral, with quartz and muscovite/illite as accessory minerals. Chemical data show that the kaolin is com...
متن کاملنقش کانیشناسی در مناطق متأثر از تراوشهای طبیعی شور اسیدی، جنوب غربی استرالیا
The study of morphological and mineralogical changes within a natural acid saline seep affected landscape revealed that seasonal differences in surface mineralogy, reflecting the operation of sulfidization and oxidative sulfide weathering processes. During the wet season, the surface and near surface of the waterlogged seep and marsh areas is dominated by black sulfidic materials (pyrite) and m...
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تاریخ انتشار 2008