干旱区生态环境知识资源中心(Arid): Aeolian dunes morphodynamics and wind regime reconstruction in mid-latitudes of the Gondwana during Early Permian, Aracare Formation, Sergipe-Alagoas Basin, Brazil

Arid

DOI	10.1016/j.aeolia.2021.100672
	Aeolian dunes morphodynamics and wind regime reconstruction in mid-latitudes of the Gondwana during Early Permian, Aracare Formation, Sergipe-Alagoas Basin, Brazil
	Jones, Fabio Herbert; dos Santos Scherer, Claiton Marlon; Kifumbi, Carrel
通讯作者	Jones, FH (corresponding author), Univ Fed Rio Grande do Sul, Inst Geociencias, POB 15001, BR-91501970 Porto Alegre, RS, Brazil.
来源期刊	AEOLIAN RESEARCH
ISSN	1875-9637
EISSN	2212-1684
出版年	2021
卷号	50
英文摘要	Aeolian systems play an important role in palaeoclimatic studies, allowing the inference of arid regions in different geological periods, in addition to being the best records for acquiring palaeowind data. Morphodynamic reconstruction of ancient aeolian dunes is extremely important for understanding the local wind regime. This study aims to contribute to the morphodynamic reconstruction of aeolian deposits of the Aracare? Formation in response to Gondwana?s palaeoclimatic variations and to indicate the prevailing wind regime. Permian Aracare? Formation is located in the Sergipe-Alagoas Basin, northeast region of Brazil, and exhibits sand accumulation of successive sets of aeolian cross-strata which are interpreted as dry aeolian system. Aracare? Formation is characterized by smaller cross-bedded sets of barchanoid dunes at the base that are overlaid by larger cross-bedded sets of transverse dunes. Aeolian cross-strata show a repetitive alternation of grainflow and wind-ripple packages, separated by reactivation surfaces indicating seasonal variations in wind direction. Cross-strata mean vectors dip consistently towards ESE when corrected for the palaeogeographic position of the Lower Permian. Cyclic stratification pattern suggests an alternation of westerly transverse winds responsible for dune migration, followed by reverse winds that caused dune reworking and led to the formation of reactivation surfaces and the related deposition of wind-ripple. Sometimes, reverse winds are more intense (storms?), strongly eroding the lee face of the aeolian dunes, generating master reactivation surfaces. The comparison between the wind patterns of Aracare? Formation and Sakmarian climate models showed good correlation with disposition of westerlies wind regime in mid-latitude in Gondwana landmass.
英文关键词	Dune morphology Dry aeolian system Master reactivation surfaces Mid-latitude Gondwana Westerlies
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000647795500001
WOS关键词	CEDAR-MESA SANDSTONE ; PARNAIBA BASIN ; STRATIGRAPHIC EVOLUTION ; FACIES ARCHITECTURE ; INTERDUNE DEPOSITS ; BOUNDING SURFACES ; BARRIER-ISLAND ; COASTAL DUNES ; EOLIAN DUNES ; CLIMATE
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349288
作者单位	[Jones, Fabio Herbert; dos Santos Scherer, Claiton Marlon; Kifumbi, Carrel] Univ Fed Rio Grande do Sul, Inst Geociencias, POB 15001, BR-91501970 Porto Alegre, RS, Brazil
推荐引用方式 GB/T 7714	Jones, Fabio Herbert,dos Santos Scherer, Claiton Marlon,Kifumbi, Carrel. Aeolian dunes morphodynamics and wind regime reconstruction in mid-latitudes of the Gondwana during Early Permian, Aracare Formation, Sergipe-Alagoas Basin, Brazil[J],2021,50.
APA	Jones, Fabio Herbert,dos Santos Scherer, Claiton Marlon,&Kifumbi, Carrel.(2021).Aeolian dunes morphodynamics and wind regime reconstruction in mid-latitudes of the Gondwana during Early Permian, Aracare Formation, Sergipe-Alagoas Basin, Brazil.AEOLIAN RESEARCH,50.
MLA	Jones, Fabio Herbert,et al."Aeolian dunes morphodynamics and wind regime reconstruction in mid-latitudes of the Gondwana during Early Permian, Aracare Formation, Sergipe-Alagoas Basin, Brazil".AEOLIAN RESEARCH 50(2021).