Beach sand deposits on the coast of southern Norway as a natural experimental setup to test hypotheses on soil development and luminescence dating
挪威南部海岸的海滩沙沉积物作为测试土壤发育和发光测年假设的自然实验装置
基本信息
- 批准号:163699138
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2010
- 资助国家:德国
- 起止时间:2009-12-31 至 2014-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Beach sand deposits are widespread in the area around Sandefjord, at the western coast of the Oslofjord, southern Norway. The age of the deposits continuously increases with elevation, as the area has been subject to steady glacio-isostatic uplift throughout the Holocene. Existing local sea level curves provide age control related to elevation. Thus, the area offers excellent conditions to test hypotheses on soil formation and OSL dating. A chronosequence covering the last 10 000 years will be established. A preliminary study showed that soil formation leads to Podzols within 4300 - 6600 years. Micromorphological analyses suggest that clay illuviation takes place before and below podzolisation. It is hypothesised that clay translocation goes on contemporarily with podzolisation, but at greater soil depth, where the chemical conditions are suitable. This hypothesis will be proved by more detailed micromorphological investigation and chemical analyses. The factors controlling soil forming processes and their rates, will be determined by analyzing elemental composition, primary minerals and clay mineralogy. Preliminary OSL dating tests suggest that the beach sand deposits are OSL dateable despite the high latitude. This hypothesis will be checked by comparing OSL datings to ages derived from the 14C-based sea level curves.
海滩沙子沉积广泛分布在挪威南部奥斯洛峡湾西海岸桑德霍德周围地区。沉积物的年龄随着海拔的升高而不断增加,因为该地区在整个全新世都经历了稳定的冰川均衡隆升。现有的当地海平面曲线提供了与海拔相关的年龄控制。因此,该地区为检验土壤形成和OSL测年假说提供了极好的条件。将建立一个涵盖过去10000年的时间序列。一项初步研究表明,土壤的形成导致了4300-6600年的泥炭。微形态分析表明,粘土幻化发生在泥灰化之前和之下。据推测,粘土的迁移与泥灰化同时进行,但在更深的土壤中进行,那里的化学条件合适。这一假说将通过更详细的微形态调查和化学分析来证实。控制土壤形成过程及其速率的因素将通过分析元素组成、主要矿物和粘土矿物学来确定。初步的OSL测年测试表明,尽管地处高纬度,海滩沙子沉积物仍可进行OSL测年。这一假设将通过将OSL日期与基于14C的海平面曲线得出的年龄进行比较来验证。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professorin Dr. Daniela Sauer其他文献
Professorin Dr. Daniela Sauer的其他文献
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{{ truncateString('Professorin Dr. Daniela Sauer', 18)}}的其他基金
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