Mineral magnetic properties of Holocene lake sediments and soils from the Kårsa valley, Lappland, Sweden, and their relevance to palaeoenvironmental reconstruction
Mineral magnetic properties of Holocene lake sediments and soils from the Kårsa valley, Lappland, Sweden, and their relevance to palaeoenvironmental reconstruction
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DOI：
10.1111/j.1365-3121.1993.tb00257.x
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发表时间：
1993-05
期刊：
影响因子：
2.4
通讯作者：
I. Snowball
中科院分区：
文献类型：
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作者：
I. Snowball
对瑞典拉普兰的卡尔萨河谷的湖泊沉积物和土壤进行了一项矿物磁研究，以估计矿物磁技术在阐明冰川波动和土壤发育所记录的气候变化方面的潜力。来自两个湖泊盆地的沉积物岩心从冰川流出流中接收沉积物输入，以及它们各自的集水区，显示出可以根据冰川活动和土壤发育来解释的矿物磁记录。在气候改善时期，磁铁矿的溶解作用引起了高s比。在冰期推进（和更冷、更湿的气候）期间，成矿沉积物供应增加，沉积物中保留了磁铁矿，导致低s比。然后，s比率的变化可以用作代用气候指标。
A mineral magnetic study of lacustrine sediments and soils from the Karsa 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.