干旱区生态环境知识资源中心(Arid): Evolution of Jurassic intertrap deposits in the Parnaiba Basin, northern Brazil: The last sediment-lava interaction linked to the CAMP in West Gondwana

Arid

DOI	10.1016/j.palaeo.2021.110370
	Evolution of Jurassic intertrap deposits in the Parnaiba Basin, northern Brazil: The last sediment-lava interaction linked to the CAMP in West Gondwana
	Rodrigues Nogueira, Afonso Cesar; Neri Rabelo, Cleber Eduardo; Goes, Ana Maria; Cardoso, Alexandre Ribeiro; Bandeira, Jose; Rezende, Gabriel Leal; dos Santos, Renan Fernandes; Truckenbrodt, Werner
通讯作者	Nogueira, ACR (corresponding author), Univ Fed Para UFPA, Inst Geociencias, Programa Posgrad Geol & Geoquim PPGG, Rua Augusto Correa S-N, BR-66075110 Belem, Para, Brazil.
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2021
卷号	572
英文摘要	The opening of the Central Atlantic Ocean was accompanied by ascending plume zones that generated large igneous provinces (LIPs), such as the Central Atlantic Magmatic Province (CAMP), with voluminous lava flows and outpourings. One of the best records of the CAMP in the West Gondwana is the Jurassic volcanic-sedimentary succession exposed in the western Parnaiba Basin, northern Brazil. Diagenetic and hydrothermal processes are discussed, focusing on the lava-sediment interaction. The siliciclastic sediments called intertrap deposits record a wet desert system characterized by fluvial-aeolian and shallow lake deposits engulfed by lavas of the CAMP at approximately 200-202 Ma. The facies and petrographic studies, based on a drill core and outcrops, led to the interpretation of the palaeoenvironmental and diagenetic evolution of the intertrap deposits. The intertrap deposits are sandwiched by basalts and may be organized in seven sedimentary facies, grouped into two facies associations: 1) ephemeral braided river deposits (FA1), which consist of medium- to coarse-grained pebbly sandstone with poorly sorted angular to sub-rounded grains (basaltic fragments and quartz) and low-angle cross-bedding, even-parallel stratification, and trough cross-stratification, and 2) pond/shallow lake deposits (FA2) composed of tabular beds of sandstone/siltstone rhythmite and laminated mudstone. The main architectural elements of intertrap deposits are 1) channels on volcanic substrate, 2) sand sheets deposited over pre-existent lava topography, 3) tabular beds with laminated rhythmites, and 4) sand-filled fissures/fractures and clastic dykes. The intensification of magmatic processes due to the disruption of Pangaea promoted the formation of extensive volcanic plains, whereas wet desert settings were developed during the quiescent intervals between lava flow episodes. Fluvial channels with subaqueous dunes and sand sheets were incised into the basaltic substrate. The abandoned fluvial plains were affected by flash floods that promoted mechanical infiltration of clays, forming coatings over grains. The heat flow and hydrothermal activity of volcanic rocks increased the devitrification of glassy clasts, releasing silica and precipitating low-temperature authigenic mineral assemblages. The most common pore-filling process was the massive precipitation of early diagenetic-hydrothermal minerals, including smectite, chalcedony, poikilotopic zeolite, megaquartz, and haematite, which partially obliterated the primary porosity and permeability. These exceptional conditions of cementation triggered by basalt eruptions precluded the modification of a primary framework by late stages (post-Jurassic) burial diagenesis. The intertrap sandstones represent the last lava-sediment interaction related to the CAMP recorded in West Gondwana.
英文关键词	Supercontinent break-up Desert system Hydrothermalism Early diagenesis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000648525800001
WOS关键词	ATLANTIC MAGMATIC PROVINCE ; OXYGEN-ISOTOPE GEOCHEMISTRY ; CONTINENTAL FLOOD BASALTS ; TRIASSIC MASS EXTINCTION ; SOUTH-AFRICA ; QUARTZ CEMENTATION ; RECONCAVO BASIN ; GREENSTONE-BELT ; PARANA BASIN ; SANDSTONES
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351278
作者单位	[Rodrigues Nogueira, Afonso Cesar; Neri Rabelo, Cleber Eduardo; Cardoso, Alexandre Ribeiro; Bandeira, Jose; Rezende, Gabriel Leal; dos Santos, Renan Fernandes; Truckenbrodt, Werner] Univ Fed Para UFPA, Inst Geociencias, Programa Posgrad Geol & Geoquim PPGG, Rua Augusto Correa S-N, BR-66075110 Belem, Para, Brazil; [Rodrigues Nogueira, Afonso Cesar] Res Prod CNPq, Brussels, Belgium; [Goes, Ana Maria] Univ Sao Paulo, Inst Geociencias, Sao Paulo, SP, Brazil
推荐引用方式 GB/T 7714	Rodrigues Nogueira, Afonso Cesar,Neri Rabelo, Cleber Eduardo,Goes, Ana Maria,et al. Evolution of Jurassic intertrap deposits in the Parnaiba Basin, northern Brazil: The last sediment-lava interaction linked to the CAMP in West Gondwana[J],2021,572.
APA	Rodrigues Nogueira, Afonso Cesar.,Neri Rabelo, Cleber Eduardo.,Goes, Ana Maria.,Cardoso, Alexandre Ribeiro.,Bandeira, Jose.,...&Truckenbrodt, Werner.(2021).Evolution of Jurassic intertrap deposits in the Parnaiba Basin, northern Brazil: The last sediment-lava interaction linked to the CAMP in West Gondwana.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,572.
MLA	Rodrigues Nogueira, Afonso Cesar,et al."Evolution of Jurassic intertrap deposits in the Parnaiba Basin, northern Brazil: The last sediment-lava interaction linked to the CAMP in West Gondwana".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 572(2021).