Structure of the crust and upper mantle beneath the Parnaíba Basin, Brazil, from wide-angle reflection–refraction data
Posted on 2018-04-04 - 11:06
The Parnaíba Basin is a Phanerozoic intracontinental basin within the South America plate, lying on top of and within Precambrian terranes. The Parnaíba Basin Analysis Program wide-angle reflection–refraction (WARR) lies east–west and is 1150 km long profile crossing the basin and its margins. The WARR results show that the crust and uppermost mantle along the profile consist of the Amazonian Craton and Borborema Province, and the Grajaú and Teresina domains comprising the Parnaíba block hidden below the sedimentary cover of the basin itself. The lithospheric characteristics of the Parnaíba block and their differences from the adjacent Precambrian Amazonian Craton and Borborema Province elucidate some aspects of the present day existence of the sedimentary basin covering it. Important elements include the presence of a high mantle velocity and high-velocity lowermost crustal region, interpreted as linked to the intrusion of mafic material into the crustunderlying the Grajaú domain, and indications that the crust in this area has been intruded since its consolidation
in the Neoproterozoic. It is tentatively proposed that magmatism is related to the inferred thinning of the lower
crust of the Teresina and Borborema segments of the profile, with this, in turn, linked to Cretaceous extensional
tectonics and the opening of the South Atlantic Ocean.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Soares, José E.P.; Stephenson, Randell; Fuck, Reinhardt A.; de Lima, Marcus V.A.G.; de Araújo, Vitto C.M.; Lima, Flávio T.; et al. (2018). Structure of the crust and upper mantle beneath the Parnaíba Basin, Brazil, from wide-angle reflection–refraction data. Geological Society of London. Collection. https://doi.org/10.6084/m9.figshare.c.4058582.v1
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
Read the peer-reviewed publication
AUTHORS (8)
JS
José E.P. Soares
RS
Randell Stephenson
RF
Reinhardt A. Fuck
Md
Marcus V.A.G. de Lima
Vd
Vitto C.M. de Araújo
FL
Flávio T. Lima
FR
Fábio A.S. Rocha
Cd
Cíntia R. da Trindade
CATEGORIES
KEYWORDS
Phanerozoic intracontinental basinBorborema ProvinceCretaceous extensional tectonicsPrecambrian terranesParna íba blockBorborema segments1150 kmSouth America platemantle velocitylithospheric characteristicslowermost crustal regionSouth Atlantic OceanreflectionGraja úWARR results showBorborema Province elucidateTeresina domainswide-angleImportant elementsmafic materialprofileParna íba Basinday existenceAmazonian CratonGraja ú domainGeology