干旱区生态环境知识资源中心(Arid): The antiquity of the Sahara Desert: New evidence from the mineralogy and geochemistry of Pliocene paleosols on the Canary Islands, Spain

Arid

DOI	10.1016/j.palaeo.2019.109245
	The antiquity of the Sahara Desert: New evidence from the mineralogy and geochemistry of Pliocene paleosols on the Canary Islands, Spain
	Muhs, Daniel R.1; Meco, Joaquin 2; Budahn, James R.1; Skipp, Gary L.1; Betancort, Juan F.2; Lomoschitz, Alejandro 3
通讯作者	Muhs, Daniel R.
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2019
卷号	533
英文摘要	The Sahara is the largest warm desert in the world, but its age has been controversial, with estimates ranging from Miocene to Holocene. Mineralogical and geochemical data show that paleosols of Pliocene to mid Pleistocene age on Fuerteventura and Gran Canaria in the Canary Islands have developed in part from inputs of dust from Africa. These paleosols contain quartz and mica, minerals that are abundant in African dust but are rare in the basaltic rocks that dominate the Canary Islands. Trace elements with minimal mobility, Sc, Cr, Hf, Th, and Ta as well as the rare earth elements, show that paleosols have compositions that are intermediate between those of local rocks and African-derived dust. Thus, results reported here and in a recently published study by others indicate that 9 paleosols record delivery of African dust to the Canary Islands between similar to 4.8-2.8 Ma, similar to 3.0-2.9 Ma, similar to 2.3-1.46 Ma, and similar to 0.4 Ma. A long-term paleosol record of African dust input agrees with deepsea records off the coast of western Africa that imply increased dust fluxes to the eastern Atlantic Ocean at similar to 4.6 Ma. It is concluded that the Sahara Desert has been in existence as an arid-region dust source, at least intermittently, for much of the Pliocene and continuing into the Pleistocene.
英文关键词	Paleoclimate Aridity African dust Clay minerals Trace elements
类型	Article
语种	英语
国家	USA ; Spain
开放获取类型	Green Published, Bronze
收录类别	SCI-E
WOS记录号	WOS:000487174100017
WOS关键词	RARE-EARTH-ELEMENTS ; SEA-LEVEL HISTORY ; GRAN-CANARIA ; NORTH-ATLANTIC ; CONTACT AUREOLE ; PARTICLE-SIZE ; DUST ; FUERTEVENTURA ; CLIMATE ; EVOLUTION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
EI主题词	2019-11-01
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310711
作者单位	1.US Geol Survey, Fed Ctr, MS 980,Box 25046, Denver, CO 80225 USA; 2.Univ Las Palmas Gran Canaria, Dept Biol, Las Palmas Gran Canaria 35017, Canary Islands, Spain; 3.Univ Las Palmas Gran Canaria, Inst Oceanog & Cambio Global, CSIC, Unidad Asociada IDi,IOCAG, Las Palmas Gran Canaria 35017, Canary Islands, Spain
推荐引用方式 GB/T 7714	Muhs, Daniel R.,Meco, Joaquin,Budahn, James R.,et al. The antiquity of the Sahara Desert: New evidence from the mineralogy and geochemistry of Pliocene paleosols on the Canary Islands, Spain[J]. United States Geological Survey,2019,533.
APA	Muhs, Daniel R.,Meco, Joaquin,Budahn, James R.,Skipp, Gary L.,Betancort, Juan F.,&Lomoschitz, Alejandro.(2019).The antiquity of the Sahara Desert: New evidence from the mineralogy and geochemistry of Pliocene paleosols on the Canary Islands, Spain.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,533.
MLA	Muhs, Daniel R.,et al."The antiquity of the Sahara Desert: New evidence from the mineralogy and geochemistry of Pliocene paleosols on the Canary Islands, Spain".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 533(2019).