Weathering processes and Quaternary origin of an alpine blockfield in Arctic Sweden
The weathering and origin of an autochthonous blockfield in the northern Swedish mountains were investigated through an examination of fine matrix and clasts from two pits excavated across ridge‐top sorted circles; one on a summit, the other in a saddle. At the summit, fine matrix chemical weatherin...
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crwiley:10.1111/j.1502-3885.2008.00061.x 2024-09-09T19:25:55+00:00 Weathering processes and Quaternary origin of an alpine blockfield in Arctic Sweden GOODFELLOW, BRADLEY W. FREDIN, OLA DERRON, MARC‐HENRI STROEVEN, ARJEN P. 2009 http://dx.doi.org/10.1111/j.1502-3885.2008.00061.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2008.00061.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2008.00061.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 38, issue 2, page 379-398 ISSN 0300-9483 1502-3885 journal-article 2009 crwiley https://doi.org/10.1111/j.1502-3885.2008.00061.x 2024-08-01T04:23:36Z The weathering and origin of an autochthonous blockfield in the northern Swedish mountains were investigated through an examination of fine matrix and clasts from two pits excavated across ridge‐top sorted circles; one on a summit, the other in a saddle. At the summit, fine matrix chemical weathering is limited to the production of poorly crystallized Al‐ and Fe‐oxyhydroxides, whereas some additional vermiculitization and gibbsite crystallization occurs in the saddle. In both locations, volumes of clay‐sized matrix are low, mass balance calculations indicate only minor elemental losses and no chemically etched grains are visible under a scanning electron microscope (SEM). In addition, soil horizons are absent and chemical weathering intensity is uniformly low across both excavated sorted circles. Minor clast chemical weathering consists of Fe oxidation, which dominates in the matrix‐rich circle centres, and some rind development, which increases in frequency in the clast‐rich rings. The dominance of physical weathering processes and the presence of only minor chemical weathering, in both fine matrix and clasts, indicate that the blockfield is not a Neogene weathering remnant. Rather, the blockfield has a Quaternary origin, developing during interglacials, interstadials and the Holocene, primarily through subsurface weathering processes. Article in Journal/Newspaper Arctic Wiley Online Library Arctic Boreas 38 2 379 398 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
The weathering and origin of an autochthonous blockfield in the northern Swedish mountains were investigated through an examination of fine matrix and clasts from two pits excavated across ridge‐top sorted circles; one on a summit, the other in a saddle. At the summit, fine matrix chemical weathering is limited to the production of poorly crystallized Al‐ and Fe‐oxyhydroxides, whereas some additional vermiculitization and gibbsite crystallization occurs in the saddle. In both locations, volumes of clay‐sized matrix are low, mass balance calculations indicate only minor elemental losses and no chemically etched grains are visible under a scanning electron microscope (SEM). In addition, soil horizons are absent and chemical weathering intensity is uniformly low across both excavated sorted circles. Minor clast chemical weathering consists of Fe oxidation, which dominates in the matrix‐rich circle centres, and some rind development, which increases in frequency in the clast‐rich rings. The dominance of physical weathering processes and the presence of only minor chemical weathering, in both fine matrix and clasts, indicate that the blockfield is not a Neogene weathering remnant. Rather, the blockfield has a Quaternary origin, developing during interglacials, interstadials and the Holocene, primarily through subsurface weathering processes. |
format |
Article in Journal/Newspaper |
author |
GOODFELLOW, BRADLEY W. FREDIN, OLA DERRON, MARC‐HENRI STROEVEN, ARJEN P. |
spellingShingle |
GOODFELLOW, BRADLEY W. FREDIN, OLA DERRON, MARC‐HENRI STROEVEN, ARJEN P. Weathering processes and Quaternary origin of an alpine blockfield in Arctic Sweden |
author_facet |
GOODFELLOW, BRADLEY W. FREDIN, OLA DERRON, MARC‐HENRI STROEVEN, ARJEN P. |
author_sort |
GOODFELLOW, BRADLEY W. |
title |
Weathering processes and Quaternary origin of an alpine blockfield in Arctic Sweden |
title_short |
Weathering processes and Quaternary origin of an alpine blockfield in Arctic Sweden |
title_full |
Weathering processes and Quaternary origin of an alpine blockfield in Arctic Sweden |
title_fullStr |
Weathering processes and Quaternary origin of an alpine blockfield in Arctic Sweden |
title_full_unstemmed |
Weathering processes and Quaternary origin of an alpine blockfield in Arctic Sweden |
title_sort |
weathering processes and quaternary origin of an alpine blockfield in arctic sweden |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1502-3885.2008.00061.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2008.00061.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2008.00061.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Boreas volume 38, issue 2, page 379-398 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.2008.00061.x |
container_title |
Boreas |
container_volume |
38 |
container_issue |
2 |
container_start_page |
379 |
op_container_end_page |
398 |
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1809895619073933312 |