Mineral magnetic properties of Holocene lake sediments and soils from the Kårsa valley, Lappland, Sweden, and their relevance to palaeoenvironmental reconstruction | Zendy

Snowball Ian | Zendy

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Mineral magnetic properties of Holocene lake sediments and soils from the Kårsa valley, Lappland, Sweden, and their relevance to palaeoenvironmental reconstruction

Author(s) -

Snowball Ian

Publication year - 1993

Publication title -

terra nova

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.353

H-Index - 89

eISSN - 1365-3121

pISSN - 0954-4879

DOI - 10.1111/j.1365-3121.1993.tb00257.x

Subject(s) - geology , glacial period , sediment , glacier , holocene , soil water , geochemistry , physical geography , hydrology (agriculture) , geomorphology , soil science , oceanography , geotechnical engineering , geography

A mineral magnetic study of lacustrine sediments and soils from the Kårsa valley in Lappland, Sweden was undertaken to estimate the potential of mineral magnetic techniques in elucidating the variability of climate, recorded by glacier fluctuations and soil development. Sediment cores from two lake basins receiving sediment input from a glacial outflow stream, and their respective catchments, show a mineral magnetic record that can be interpreted in terms of glacial activity and soil development. Dissolution of magnetite is indicated during periods of climatic amelioration and causes a high S‐ratio. During periods of glacial advance (and colder, wetter climate) the minerogenic sediment supply is increased and magnetite is preserved in the sediment, resulting in a low S‐ratio. Variations in the S‐ratio can then be used as a proxy‐climate indicator.

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