ABSTRACT The aeolian deposits of Sweden have received modest attention, despite their usefulness as a palaeoenvironmental archive. Here we present sedimentological information and optically stimulated luminescence (OSL) ages from inland sand dunes in the lowlands of south-central Sweden. Three main lithofacies, each with two subfacies, were identified in the deposits: massive sand, laminated sand and cross-bedded sand. Massive sand was most common and present at all sites, and is largely due to secondary bioturbation when found close to the surface. Other prevalent depositional processes are wind-ripple migration and grain flow. Secondary features include animal burrows and tracks, root traces, infiltration structures and soil profiles. The luminescence ages plot in two different groups, centred in the early and late Holocene, respectively. The primary dune-forming phase occurred in the early Holocene, after local deglaciation and uplift above sea/lake level. However, at some sites, OSL ages suggest a prolonged phase of sand drift, or repeated reworking, long after deglaciation due to locally beneficial conditions. The late Holocene was dominated by reactivation events and sheet sand deposition, which led to the formation of an aeolian mantle.

中文翻译：

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瑞典约塔兰和韦姆兰北部的晚冰期和全新世沙漂移：沉积物和年龄

摘要瑞典的风成沉积物虽然作为古环境档案有用，但受到了适度的关注。在这里，我们展示了瑞典中南部低地内陆沙丘的沉积学信息和光激发光 (OSL) 年龄。在沉积物中确定了三个主要岩相，每个岩相都有两个亚相：块状砂岩、层状砂岩和交错层状砂岩。大块沙是最常见的，并且存在于所有地点，主要是由于靠近地表时的二次生物扰动。其他流行的沉积过程是风纹迁移和颗粒流。次要特征包括动物洞穴和足迹、根系痕迹、渗透结构和土壤剖面。发光年龄分为两组，分别以全新世早期和晚期为中心。原始沙丘形成阶段发生在全新世早期，在局部冰川消融和海平面/湖平面抬升之后。然而，在某些地点，OSL 年龄表明，由于当地有利条件，在冰川消退后很长一段时间内，沙子漂移或重复返工的阶段延长。全新世晚期主要是再活化事件和片状砂沉积，导致风成地幔的形成。