干旱区生态环境知识资源中心(Arid): Paleoenvironmental changes in southern South American dust sources during the last glacial/interglacial transition: Evidence from clay mineral assemblages of the pampean loess

Arid

DOI	10.1016/j.quaint.2020.12.044
	Paleoenvironmental changes in southern South American dust sources during the last glacial/interglacial transition: Evidence from clay mineral assemblages of the pampean loess
	Romero, Matias; Torre, Gabriela; Gaiero, Diego M.
通讯作者	Romero, M (corresponding author), UNC, CICTERRA CONICET, Av Velez Sarsfield 1699,X5016GCA, Cordoba, Argentina.
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2021
卷号	580 页码:11-21
英文摘要	Paleoclimatic reconstruction is critical for understanding present-day climate and for testing models that are currently used to predict future climatic changes. Different climatic conditions produce different clay minerals that can be recorded in geological archives providing insights into past weathering scenarios. However, in southern South America, scarce information is available from clay mineral assemblages found in aeolian sediments, such as loess deposits. Moreover, there is a lack of studies employing clay minerals for paleoclimatic reconstruction at dust sources and loess deposits. Therefore, this work explores clay mineral composition of modern dust source areas in southern South America and in the pampean loess records to gain insight into paleoenvironmental conditions prevailing during the late Pleistocene-early Holocene in the region. Clay minerals recovered from the loess deposits are of an allochthonous origin, implying their formation at the ?arid diagonal?, then blown away, and deposited downwind in the Pampas without post-depositional changes. Clay mineral assemblages indicate that these minerals and rare earth elements (REE) analyzed in two loess sections of the Pampean Plain helped to reconstruct past climatic scenarios in the dust source areas during the transition from the last glacial to the current interglacial period. Furthermore, our work contributes to the assessment of the strengthening/weakening of the different South American dust sources in light of recent published geochemical and textural evidence.
英文关键词	Late quaternary South America Pampean loess Paleoclimate Clay minerals Rare earth elements (REE)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000632047700002
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367750
作者单位	[Romero, Matias; Torre, Gabriela; Gaiero, Diego M.] Univ Nacl Cordoba UNC, Fac Ciencias Exactas Fis & Nat, Cordoba, Argentina; [Romero, Matias; Torre, Gabriela; Gaiero, Diego M.] Univ Nacl Cordoba UNC, Ctr Invest Ciencias Tierra CICTERRA, Consejo Nacl Invest Cient & Tecnol CONICET, Cordoba, Argentina
推荐引用方式 GB/T 7714	Romero, Matias,Torre, Gabriela,Gaiero, Diego M.. Paleoenvironmental changes in southern South American dust sources during the last glacial/interglacial transition: Evidence from clay mineral assemblages of the pampean loess[J],2021,580:11-21.
APA	Romero, Matias,Torre, Gabriela,&Gaiero, Diego M..(2021).Paleoenvironmental changes in southern South American dust sources during the last glacial/interglacial transition: Evidence from clay mineral assemblages of the pampean loess.QUATERNARY INTERNATIONAL,580,11-21.
MLA	Romero, Matias,et al."Paleoenvironmental changes in southern South American dust sources during the last glacial/interglacial transition: Evidence from clay mineral assemblages of the pampean loess".QUATERNARY INTERNATIONAL 580(2021):11-21.