Clay-Sized Minerals in Permafrost-Affected Soils (Cryosols) From King George Island, Antarctica
Abstract Cryosols from Maritime Antarctica have been less studied than soils from continental areas of Antarctica. In this work X-ray diffraction, difference X-ray diffraction, differential thermal analysis, thermogravimetry, transmission electron microscopy/energy dispersive spectroscopy and select...
Published in: | Clays and Clay Minerals |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2006
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1346/ccmn.2006.0540607 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0009860400033723 |
id |
crcambridgeupr:10.1346/ccmn.2006.0540607 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1346/ccmn.2006.0540607 2024-09-30T14:26:02+00:00 Clay-Sized Minerals in Permafrost-Affected Soils (Cryosols) From King George Island, Antarctica Simas, Felipe N. B. Schaefer, Carlos Ernesto G. R. Melo, Vander F. Guerra, Marcelo B. B. Saunders, Martin Gilkes, Robert J. 2006 http://dx.doi.org/10.1346/ccmn.2006.0540607 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0009860400033723 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Clays and Clay Minerals volume 54, issue 6, page 721-736 ISSN 0009-8604 1552-8367 journal-article 2006 crcambridgeupr https://doi.org/10.1346/ccmn.2006.0540607 2024-09-04T04:02:53Z Abstract Cryosols from Maritime Antarctica have been less studied than soils from continental areas of Antarctica. In this work X-ray diffraction, difference X-ray diffraction, differential thermal analysis, thermogravimetry, transmission electron microscopy/energy dispersive spectroscopy and selective chemical dissolution were used to characterize the clay fraction of basaltic, acid sulfate and ornithogenic Cryosols from ice-free areas of Admiralty Bay, King George Island. Non-crystalline phases are important soil components and reach >75% of the clay fraction for some ornithogenic soils. Randomly interstratified smectite-hydroxy-Al-interlayered smectite is the main clay mineral of basaltic soils. Kaolinite, chlorite and regularly interstratified illite-smectite predominate in acid sulfate soils. Jarosite is also an important component of the clay fraction in these soils. Crystalline Al and Fe phosphates occur in the clay at sites directly affected by penguin activity and the chemical characteristics of these ornithogenic sites are controlled by highly reactive, non-crystalline Al, Si, Fe and P phases. Chemical weathering is an active process in Cryosols in Maritime Antarctica and is enhanced by the presence of sulfides for some parent materials, and faunal activity. Article in Journal/Newspaper Antarc* Antarctica Ice King George Island permafrost Cambridge University Press Admiralty Bay King George Island Clays and Clay Minerals 54 6 721 736 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Cryosols from Maritime Antarctica have been less studied than soils from continental areas of Antarctica. In this work X-ray diffraction, difference X-ray diffraction, differential thermal analysis, thermogravimetry, transmission electron microscopy/energy dispersive spectroscopy and selective chemical dissolution were used to characterize the clay fraction of basaltic, acid sulfate and ornithogenic Cryosols from ice-free areas of Admiralty Bay, King George Island. Non-crystalline phases are important soil components and reach >75% of the clay fraction for some ornithogenic soils. Randomly interstratified smectite-hydroxy-Al-interlayered smectite is the main clay mineral of basaltic soils. Kaolinite, chlorite and regularly interstratified illite-smectite predominate in acid sulfate soils. Jarosite is also an important component of the clay fraction in these soils. Crystalline Al and Fe phosphates occur in the clay at sites directly affected by penguin activity and the chemical characteristics of these ornithogenic sites are controlled by highly reactive, non-crystalline Al, Si, Fe and P phases. Chemical weathering is an active process in Cryosols in Maritime Antarctica and is enhanced by the presence of sulfides for some parent materials, and faunal activity. |
format |
Article in Journal/Newspaper |
author |
Simas, Felipe N. B. Schaefer, Carlos Ernesto G. R. Melo, Vander F. Guerra, Marcelo B. B. Saunders, Martin Gilkes, Robert J. |
spellingShingle |
Simas, Felipe N. B. Schaefer, Carlos Ernesto G. R. Melo, Vander F. Guerra, Marcelo B. B. Saunders, Martin Gilkes, Robert J. Clay-Sized Minerals in Permafrost-Affected Soils (Cryosols) From King George Island, Antarctica |
author_facet |
Simas, Felipe N. B. Schaefer, Carlos Ernesto G. R. Melo, Vander F. Guerra, Marcelo B. B. Saunders, Martin Gilkes, Robert J. |
author_sort |
Simas, Felipe N. B. |
title |
Clay-Sized Minerals in Permafrost-Affected Soils (Cryosols) From King George Island, Antarctica |
title_short |
Clay-Sized Minerals in Permafrost-Affected Soils (Cryosols) From King George Island, Antarctica |
title_full |
Clay-Sized Minerals in Permafrost-Affected Soils (Cryosols) From King George Island, Antarctica |
title_fullStr |
Clay-Sized Minerals in Permafrost-Affected Soils (Cryosols) From King George Island, Antarctica |
title_full_unstemmed |
Clay-Sized Minerals in Permafrost-Affected Soils (Cryosols) From King George Island, Antarctica |
title_sort |
clay-sized minerals in permafrost-affected soils (cryosols) from king george island, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1346/ccmn.2006.0540607 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0009860400033723 |
geographic |
Admiralty Bay King George Island |
geographic_facet |
Admiralty Bay King George Island |
genre |
Antarc* Antarctica Ice King George Island permafrost |
genre_facet |
Antarc* Antarctica Ice King George Island permafrost |
op_source |
Clays and Clay Minerals volume 54, issue 6, page 721-736 ISSN 0009-8604 1552-8367 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1346/ccmn.2006.0540607 |
container_title |
Clays and Clay Minerals |
container_volume |
54 |
container_issue |
6 |
container_start_page |
721 |
op_container_end_page |
736 |
_version_ |
1811646562271494144 |