干旱区生态环境知识资源中心(Arid): Ash-bearing transgressive coastal dune on Sao Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka

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DOI	10.1007/s00531-019-01795-7
	Ash-bearing transgressive coastal dune on Sao Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka
	Clemmensen, Lars B.; Holm, Paul Martin
来源期刊	INTERNATIONAL JOURNAL OF EARTH SCIENCES
ISSN	1437-3254
EISSN	1437-3262
出版年	2020
卷号	109 期号:1 页码:159-170
英文摘要	Climbing, transgressive dunes are developed at the relief-controlled narrow desert coast of Praia Grande on Sao Vicente (Cape Verde Islands) and this paper describes one of these spectacular coastal dunes. The dune was initiated during a low sea level in the Late Pleistocene; the dune migrated landwards presumably during the influence of persistent northeasterly trade winds and it reached the present coast of the island some time before 35 ka, when it was covered with volcanic ash. Volcanic activity in the Cape Verde archipelago is presently limited to the island of Fogo or is submarine. However, Late Pleistocene eruptions have been identified on many of the islands, but few eruptions younger than 100 ka have been absolutely dated. The revelation of a 35 ka pyroclastic deposit on Sao Vicente is evidence for the continued activity in the northern part of the archipelago. The Praia Grande ash is not readily reconciled with the young Strombolian or effusive Sao Vicente volcanism, which is also geochemically different. The geochemical composition of the fractionation corrected Praia Grande ash is compared to a large database for volcanic rocks of the northern part of the Cape Verde archipelago. Major and trace elements as well as incompatible element ratios in combination allow identification of the likely source for the Praia Grande ash as the Monte Gordo volcano at the island Sao Nicolau 70 km to the SE and the eruption possibly was of VEI >= 5.
英文关键词	Transgressive dune Ash layer Explosive volcanic activity Cape Verde Islands
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000500183200001
WOS关键词	LATE PLEISTOCENE ; SANTO-ANTAO ; EVOLUTION ; ERUPTION ; MALLORCA ; RECORD ; FIELD ; FALL ; AGE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
EI主题词	2019-12-02
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311531
推荐引用方式 GB/T 7714	Clemmensen, Lars B.,Holm, Paul Martin. Ash-bearing transgressive coastal dune on Sao Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka[J],2020,109(1):159-170.
APA	Clemmensen, Lars B.,&Holm, Paul Martin.(2020).Ash-bearing transgressive coastal dune on Sao Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka.INTERNATIONAL JOURNAL OF EARTH SCIENCES,109(1),159-170.
MLA	Clemmensen, Lars B.,et al."Ash-bearing transgressive coastal dune on Sao Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka".INTERNATIONAL JOURNAL OF EARTH SCIENCES 109.1(2020):159-170.