Abstract The dune sequences of Fuerteventura mainly consist of biogenic carbonate sands which originate from the shallow marine shelf. By onshore winds those carbonate sands migrate landwards, building up sequences of different dune generations with intercalated reddish silty layers. Former studies discussed the formation of dune generations on Fuerteventura against climatic shifts, sea level changes or changing wind directions, and the more researchers just focused on the volcanism of that island but the influence of volcanism on the formation of dune archives has never been discussed. According to this, the absence of sand deposits is not always climatically controlled nor by sea level changes nor by changing wind direction. The distribution and dating (sharding and OSL dating) of deposits on northern Fuerteventura indicate that the palaeo dune fields close to the western coast were cut off from sand supply gradually, caused by different periods of volcanism. For northern Fuerteventura three main periods can be differentiated: I. Period: around 180–170 ka, II. Period: around 135 ka and III. Period: not later than 50 ka. In that course, we investigated a palaeo dune field close to the eastern coast to illustrate exemplarily the impact of volcanic activity on dune field formation and its morphology. Additionally, we aimed to extend the chrono-stratigraphic correlation of dune sequences (according to Roettig et al., 2017). Now, the correlation across the island is spanning from the western to the eastern coastline and dates back to 450 ka. In terms of luminescence dating, the layers dominated by carbonate sands show only small amount of datable minerals, whereas the material of reddish silty layers are dominated by the imprint of Saharan dust and therefore contain increased content of quartz and feldspar. In contrast to material dominated by carbonate sands the dating performed on palaeosurface material seem to reveal uniformly younger IRSL ages.

中文翻译：

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加那利沙丘档案的详细年代地层记录 - 沙子供应和火山活动的相互作用

摘要 富埃特文图拉沙丘层序主要由源自浅海陆架的生物碳酸盐砂组成。通过陆上风，这些碳酸盐砂向陆上迁移，形成不同沙丘世代的序列，夹杂着红色粉质层。以前的研究讨论了富埃特文图拉岛沙丘世代的形成与气候变化、海平面变化或风向变化的关系，更多的研究人员只关注该岛的火山作用，但从未讨论过火山作用对沙丘档案形成的影响。据此，没有沙子沉积物并不总是受气候、海平面变化或风向变化的控制。富埃特文图拉岛北部沉积物的分布和测年（分片和OSL测年）表明，由于不同时期的火山作用，靠近西海岸的古沙丘区逐渐切断了砂供应。对于富埃特文图拉岛北部，可以区分三个主要时期：I. 时期：大约 180-170 ka，II。时期：大约 135 ka 和 III。时间：不迟于50 ka。在该课程中，我们调查了靠近东海岸的古沙丘区，以举例说明火山活动对沙丘区形成及其形态的影响。此外，我们旨在扩展沙丘序列的年代地层相关性（根据 Roettig 等人，2017 年）。现在，整个岛屿的相关性从西部到东部海岸线跨越，可以追溯到 450 ka。在发光测年方面，以碳酸盐岩砂为主的地层仅显示少量可测矿物，而红色粉砂质层的物质以撒哈拉尘埃印记为主，因此石英和长石含量增加。与以碳酸盐砂为主的物质相反，在古地表物质上进行的测年似乎显示出均匀年轻的 IRSL 年龄。