Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2007GC001658 |
Dating Saharan dust deposits on Lanzarote (Canary Islands) by luminescence dating techniques and their implication for palaeoclimate reconstruction of NW Africa | |
von Suchodoletz, H.; Fuchs, M.; Zoeller, L. | |
通讯作者 | von Suchodoletz, H. |
来源期刊 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
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ISSN | 1525-2027 |
出版年 | 2008 |
卷号 | 9 |
英文摘要 | [1] Lava flow dammed valleys (Vegas) on Lanzarote (Canary Islands) represent unique sediment traps, filled with autochthonous volcanic material and allochthonous Saharan dust. These sediments and the intercalated palaeosoil sediments document past environmental change of the last glacial-interglacial cycles, both on Lanzarote and in NW Africa. A reliable chronology must be established to use these sediment archives for palaeoclimate reconstructions. Owing to the lack of organic material and the limiting time range of the (14)C-dating method, luminescence dating is the most promising method for these sediments. However, the fluvio-eolian character of these sediments is a major problem for luminescence dating, because these sediments are prone to insufficient resetting of the parent luminescence signal (bleaching) prior to sedimentation. To check for the best age estimates, we compare the bleaching behavior of (1) different grain sizes ( coarse-versus fine-grain quartz OSL) and (2) different minerals (fine-grain feldspar IRSL versus fine-grain quartz OSL). The results show that owing to its bleaching characteristics, quartz is the preferable mineral for luminescence dating. On the basis of the fine- and coarse-grain quartz OSL age estimates, a chronostratigraphy up to 100 ka could be established. Beyond this age limit for OSL quartz, the chronostratigraphy could be extended up to 180 ka by correlating the vega sediments with dated marine sediment archives. |
英文关键词 | luminescence dating Saharan dust Canary Islands insufficient bleaching land/sea correlation human occupation |
类型 | Article |
语种 | 英语 |
国家 | Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000253231200001 |
WOS关键词 | FLUVIAL QUARTZ ; LATE PLEISTOCENE ; SMALL ALIQUOTS ; SEDIMENTS ; SINGLE ; SPAIN ; DESERT ; RECORD ; MARGIN ; LOESS |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/157378 |
作者单位 | Univ Bayreuth, Dept Geomorphol, D-95440 Bayreuth, Germany |
推荐引用方式 GB/T 7714 | von Suchodoletz, H.,Fuchs, M.,Zoeller, L.. Dating Saharan dust deposits on Lanzarote (Canary Islands) by luminescence dating techniques and their implication for palaeoclimate reconstruction of NW Africa[J],2008,9. |
APA | von Suchodoletz, H.,Fuchs, M.,&Zoeller, L..(2008).Dating Saharan dust deposits on Lanzarote (Canary Islands) by luminescence dating techniques and their implication for palaeoclimate reconstruction of NW Africa.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,9. |
MLA | von Suchodoletz, H.,et al."Dating Saharan dust deposits on Lanzarote (Canary Islands) by luminescence dating techniques and their implication for palaeoclimate reconstruction of NW Africa".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 9(2008). |
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