气候变化领域集成服务门户(CCPortal): Ash-bearing transgressive coastal dune on São 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 São Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka
	Clemmensen L.B.; Holm P.M.
发表日期	2020
ISSN	14373254
起始页码	159
结束页码	170
卷号	109 期号:1
英文摘要	Climbing, transgressive dunes are developed at the relief-controlled narrow desert coast of Praia Grande on São 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 São 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 São 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 São Nicolau 70 km to the SE and the eruption possibly was of VEI ≥ 5. © 2019, Geologische Vereinigung e.V. (GV).
英文关键词	Ash layer; Cape Verde Islands; Explosive volcanic activity; Transgressive dune
语种	英语
scopus关键词	dune; fractionation; igneous geochemistry; Pleistocene; trace element; transgression; volcanic ash; volcanic eruption; Cape Verde [Macaronesia]; Sao Vicente [Cape Verde]
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147736
作者单位	Copenhagen, Denmark
推荐引用方式 GB/T 7714	Clemmensen L.B.,Holm P.M.. Ash-bearing transgressive coastal dune on São Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka[J],2020,109(1).
APA	Clemmensen L.B.,&Holm P.M..(2020).Ash-bearing transgressive coastal dune on São Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka.International Journal of Earth Sciences,109(1).
MLA	Clemmensen L.B.,et al."Ash-bearing transgressive coastal dune on São Vincente (Cape Verde Islands): dune history and evidence of explosive volcanic activity around 35 ka".International Journal of Earth Sciences 109.1(2020).