干旱区生态环境知识资源中心(Arid): Permian mixed carbonate-siliciclastic lagoon coastal system in West-Central Gondwana

Arid

DOI	10.1016/j.sedgeo.2020.105829
	Permian mixed carbonate-siliciclastic lagoon coastal system in West-Central Gondwana
	Silva, Rafael Oliveira; Praca Leite, Mariangela Garcia; Rudnitzki, Isaac; Souza-Lima, Wagner
通讯作者	Silva, RO (corresponding author), Univ Fed Ouro Preto, Dept Geol, Rua Paulo Magalhaes Gomes 122, BR-35400000 Ouro Preto, MG, Brazil.
来源期刊	SEDIMENTARY GEOLOGY
ISSN	0037-0738
EISSN	1879-0968
出版年	2021
卷号	414
英文摘要	Although in recent years mixed carbonate-siliciclastic platforms have been increasingly recognized in the Permian of Western Gondwana, there is no detailed description of these mixed systems in West-Central Gondwana. This study focuses on the Permian of the Sergipe-Alagoas Basin (NE Brazil), with the aim of filling this knowledge gap. Based on sedimentological data and microfacies analysis, six facies associations (FA) were identified: FA1 is an eolian-fluvial system, composed of stratified sandstones, FA2 and FA3 represent a mixed tidal flat-lagoon system composed of microbialites, pelitic/micritic sediments and intraclastic packstones, FA4 represents shoreface wave deposits composed of laminated sandstones and silicified grainstones, and FA5 and FA6 are interpreted as a barrier-tidal inlet system, composed of oolitic/intraclastic grainstones, subtidal microbialites, and mixed rudstones. Facies associations reflect the paleoenvironmental conditions of a coastal environment, with dunes and small rivers adjacent to a mixed carbonate-siliciclastic ramp. This is defined as a lagoon system associated with tidal flats protected from the high-energy region by carbonate shoals and microbial constructions. These deposits represent the eastern portion of a shallow epicontinental sea that covered lowlands in West-Central Gondwana within the arid-semiarid belt, whose climate characteristics are reflected in eolian deposits, desiccation structures, mixed carbonate-siliciclastic facies, and fossil records. The main diagenetic feature observed in petrographic analyses was an early diagenetic silicification. Although the absence of spiculites and shelf configuration did not allow a correlation with the Permian glass ramp model, similarities were observed with Eocene glass ramps of Australia, and a relationship with the Permian Chert Event is suggested. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Permian Mixed siliciclastic-carbonate Central Gondwana Silicification
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000654038300004
WOS关键词	RESOLUTION SEQUENCE STRATIGRAPHY ; PARNAIBA BASIN ; AEOLIAN DUNE ; PALEOENVIRONMENTAL CHANGES ; DEPOSITIONAL-ENVIRONMENTS ; INTERDUNE DEPOSITS ; ITARARE GROUP ; PARANA BASIN ; MARINE ; SEDIMENTATION
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/2XILL650/368942
作者单位	[Silva, Rafael Oliveira; Praca Leite, Mariangela Garcia; Rudnitzki, Isaac] Univ Fed Ouro Preto, Dept Geol, Rua Paulo Magalhaes Gomes 122, BR-35400000 Ouro Preto, MG, Brazil; [Silva, Rafael Oliveira; Souza-Lima, Wagner] Fundacao Paleontol Phoenix, Rua Geraldo Menezes de Carvalho 218, BR-49050360 Aracaju, Sergipe, Brazil
推荐引用方式 GB/T 7714	Silva, Rafael Oliveira,Praca Leite, Mariangela Garcia,Rudnitzki, Isaac,et al. Permian mixed carbonate-siliciclastic lagoon coastal system in West-Central Gondwana[J],2021,414.
APA	Silva, Rafael Oliveira,Praca Leite, Mariangela Garcia,Rudnitzki, Isaac,&Souza-Lima, Wagner.(2021).Permian mixed carbonate-siliciclastic lagoon coastal system in West-Central Gondwana.SEDIMENTARY GEOLOGY,414.
MLA	Silva, Rafael Oliveira,et al."Permian mixed carbonate-siliciclastic lagoon coastal system in West-Central Gondwana".SEDIMENTARY GEOLOGY 414(2021).