Beach sand deposits on the coast of southern Norway as a natural experimental setup to test hypotheses on soil development and luminescence dating

海滩沙沉积物广泛分布于挪威南部奥斯陆峡湾西海岸的桑德峡湾周围地区。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一直受到稳定的冰川均衡隆起的影响。现有的当地海平面曲线提供了与高程相关的年龄控制。因此，该地区提供了极好的条件来测试土壤形成和光释光测年的假设。将建立一个涵盖过去10000年的时间序列。一项初步研究表明，土壤的形成在4300 - 6600年内导致了灰壤。微形态学分析表明，粘土illuminatism发生之前和以下灰化。据推测，粘土易位与灰化同时进行，但在更大的土壤深度，那里的化学条件是合适的。这一假设将通过更详细的微形态调查和化学分析来证明。控制土壤形成过程及其速率的因素将通过分析元素组成、原生矿物和粘土矿物学来确定。初步的光释光测年试验表明，尽管纬度较高，但海滩砂沉积物仍具有光释光测年能力。这一假设将通过比较光释光测年的年龄来自14 C为基础的海平面曲线进行检查。

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.