干旱区生态环境知识资源中心(Arid): Calcretes and travertines from the Palaeocene Itaborai Basin as evidence of the early evolution of the Southeastern Brazil Continental Rift

Arid

DOI	10.1111/sed.12788
	Calcretes and travertines from the Palaeocene Itaborai Basin as evidence of the early evolution of the Southeastern Brazil Continental Rift
	Adler, Paula Braga; De Ros, Luiz Fernando; Mansur, Katia Leite; Ferrari, Andre Luiz; Fernandes, Luiz Alberto; Sial, Alcides Nobrega
通讯作者	Adler, PB
来源期刊	SEDIMENTOLOGY
ISSN	0037-0746
EISSN	1365-3091
出版年	2021
卷号	68 期号:1 页码:477-511
英文摘要	The Itaborai Basin, located in Rio de Janeiro state, is the smallest segment of the Southeastern Brazil Continental Rift, and the first to open, during the Palaeocene. Numerous studies focused on its fossiliferous content, but few systematically approached its depositional and diagenetic processes and products. A detailed description of the basal sedimentary deposits that remained after nearly fifty years of exploitation for cement production allowed an interpretation of the initial tectono-sedimentary conditions responsible for the formation of the Basin. The macroscopic and petrographic description of outcrops and well core samples of the calcretes and travertines that correspond to the initial basin infill was integrated with stable isotope geochemistry. The calcretes were separated into different facies (powdery, nodular, massive, platy, laminated and brecciated), and classified according to morphogenetic stages. Their main microscopic features include nodules, contraction cracks, vadose pisoliths, rhizocretions, infiltrated clays, corroded grains, expanded micas and clay aggregates with bimasepic-plasmic microfabric. The travertines exhibit diverse forms of abiotic calcite crystal aggregates (plumose, lamellar to prismatic-radial, spherulitic) and a minor proportion of microbial microcrystalline precipitates (bacterial shrubs). Tectonically active periods, characterized by intense fault movements associated with humid climate, promoted hydrothermal activity, formation of travertines and modification of the alluvial deposits and calcrete facies by ascending fluids. During periods of tectonic stability under arid to semi-arid climate, the exposed alluvial and hydrothermal deposits were influenced by pedogenetic processes. Sulphide-rich carbonate hydrothermal breccias occur in the main fault zone at the southern border. The characterization of extremely active pedogenetic and hydrothermal processes during opening and early evolution of the Itaborai Basin is essential to the understanding of the initial evolution of the Southeastern Brazil Continental Rift. Additionally, some isotopic and petrographic similarities of the Itaborai carbonates with the vast South Atlantic Aptian Pre-Salt lacustrine deposits may offer an interesting contribution to the understanding of that important petroleum province.
英文关键词	Diagenesis hydrothermal process morphological types pedogenetic calcrete phreatic calcrete travertine
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000579252000001
WOS关键词	MAMMOTH-HOT-SPRINGS ; YELLOWSTONE-NATIONAL-PARK ; LACUSTRINE CARBONATE RESERVOIRS ; NORTHERN CAMPOS BASIN ; RAPOLANO-TERME ; SAO-JOSE ; HYDROTHERMAL ERUPTIONS ; ISOTOPIC COMPOSITION ; LATE PLEISTOCENE ; SANTOS BASIN
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327918
作者单位	[Adler, Paula Braga; Mansur, Katia Leite] Univ Fed Rio de Janeiro, Geosci Inst, Ave Athos da Silveira Ramos 274, BR-21941916 Rio De Janeiro, RJ, Brazil; [De Ros, Luiz Fernando] Univ Fed Rio Grande do Sul, Geosci Inst, Ave Bento Goncalves 9500, BR-91509900 Porto Alegre, RS, Brazil; [Ferrari, Andre Luiz] Fluminense Fed Univ, Dept Geol & Geophys, Ave Litoranea S-No, BR-24210340 Rio De Janeiro, RJ, Brazil; [Fernandes, Luiz Alberto] Univ Fed Parana, Dept Geol, Jardim Americas 19001, BR-81531990 Curitiba, Parana, Brazil; [Sial, Alcides Nobrega] Univ Fed Pernambuco, Dept Geol, Ave Prof Moraes Rego 1235, BR-7852 Recife, PE, Brazil
推荐引用方式 GB/T 7714	Adler, Paula Braga,De Ros, Luiz Fernando,Mansur, Katia Leite,et al. Calcretes and travertines from the Palaeocene Itaborai Basin as evidence of the early evolution of the Southeastern Brazil Continental Rift[J],2021,68(1):477-511.
APA	Adler, Paula Braga,De Ros, Luiz Fernando,Mansur, Katia Leite,Ferrari, Andre Luiz,Fernandes, Luiz Alberto,&Sial, Alcides Nobrega.(2021).Calcretes and travertines from the Palaeocene Itaborai Basin as evidence of the early evolution of the Southeastern Brazil Continental Rift.SEDIMENTOLOGY,68(1),477-511.
MLA	Adler, Paula Braga,et al."Calcretes and travertines from the Palaeocene Itaborai Basin as evidence of the early evolution of the Southeastern Brazil Continental Rift".SEDIMENTOLOGY 68.1(2021):477-511.