干旱区生态环境知识资源中心(Arid): Paleoenvironmental and paleoclimatic interpretation of the Late Cretaceous Marllia Formation (Brazil) based on paleosol geochemistry

Arid

DOI	10.1016/j.catena.2019.05.003
	Paleoenvironmental and paleoclimatic interpretation of the Late Cretaceous Marllia Formation (Brazil) based on paleosol geochemistry
	Delgado, L.1; Batezelli, A.1; Ladeira, F. S. B.2; Luna, J.1
通讯作者	Delgado, L.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	180 页码:365-382
英文摘要	The Late Cretaceous Marilia Formation located in the central-southern portion of Brazil is characterized by a succession of sandstones, conglomerates, and paleosols. The paleosols constitute more than 60% of this formation, providing significant information about pedogenetic processes as well as paleoenvironmental and paleoclimate implications. The paleosols of the Marilia Formation have been studied principally from a strati graphical, sedimentological and paleopedological point of view; however, there are no studies addressing in detail the geochemical behavior of the paleosols. Therefore, we used a robust geochemical dataset combined with stratigraphical and macromorphological interpretations as well as clay mineralogy to conduct a paleoenvironmental and paleoclimate analysis of the Maxilla Formation in the western portion of the state of Minas Gerais in Brazil. The results indicate that the paleosols of the Marina Formation can be divided into three pedotypes and pedochemical units based on their geochemical variations and are limited at the base and top by pedochemical markers. Moreover, X-ray diffraction identified quartz and calcite as primary minerals associated with montmorillonite, smectite, illite and palygorskite, indicating wet periods combined with dry stages associated principally with dry and arid environments. The paleosol distribution and weathering index allow us to interpret the paleoenvironmental evolution of the Late Cretaceous Marflia Formation, suggesting an increase in humidity from east to west in the study area.
英文关键词	Late Cretaceous Marflia Formation Paleoenvironmental Paleoclimate Paleosols Geochemistry
类型	Article
语种	英语
国家	Brazil
收录类别	SCI-E
WOS记录号	WOS:000472244900034
WOS关键词	MARILIA FORMATION ; EARLY MIOCENE ; EBRO BASIN ; SOILS ; CHEMISTRY ; MINERALOGY ; EVOLUTION ; RECORD ; ROCKS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214848
作者单位	1.Univ Estadual Campinas, Inst Geosci, Dept Geol & Nat Resources, Source To Sink & Paleopedol Res Grp, Campinas, SP, Brazil; 2.Univ Estadual Campinas, Inst Geosci, Dept Geog, Source To Sink & Paleopedol Res Grp, Campinas, SP, Brazil
推荐引用方式 GB/T 7714	Delgado, L.,Batezelli, A.,Ladeira, F. S. B.,et al. Paleoenvironmental and paleoclimatic interpretation of the Late Cretaceous Marllia Formation (Brazil) based on paleosol geochemistry[J],2019,180:365-382.
APA	Delgado, L.,Batezelli, A.,Ladeira, F. S. B.,&Luna, J..(2019).Paleoenvironmental and paleoclimatic interpretation of the Late Cretaceous Marllia Formation (Brazil) based on paleosol geochemistry.CATENA,180,365-382.
MLA	Delgado, L.,et al."Paleoenvironmental and paleoclimatic interpretation of the Late Cretaceous Marllia Formation (Brazil) based on paleosol geochemistry".CATENA 180(2019):365-382.