Arid
DOI10.1029/2007GC001658
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
ISSN1525-2027
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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