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1. Identity statement
Reference TypeJournal Article
Siteplutao.sid.inpe.br
Holder Codeisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
IdentifierJ8LNKAN8RW/3E7UGK5
Repositorydpi.inpe.br/plutao/2013/05.31.17.43.24   (restricted access)
Last Update2013:08.01.18.03.07 (UTC) administrator
Metadata Repositorydpi.inpe.br/plutao/2013/05.31.17.43.25
Metadata Last Update2018:06.04.23.39.06 (UTC) administrator
DOI10.1016/j.gr.2012.05.016
ISSN1342-937X
Labellattes: 0842543237562135 1 PadilhaVitoPádu:2013:EvNeAr
Citation KeyPadilhaVitoPádu:2013:EvNeAr
TitleDeep conductivity structure beneath the northern Brasília belt, central Brazil: Evidence for a Neoproterozoic arc-continent collision
ProjectCNPq (472517/2006-6, 302347/2008-9, 303813/2009-1).
Year2013
Access Date2024, Mar. 28
Type of Workjournal article
Secondary TypePRE PI
Number of Files1
Size1287 KiB
2. Context
Author1 Padilha, Antonio Lopes
2 Vitorello, Icaro
3 Pádua, Marcelo Banik de
Resume Identifier1 8JMKD3MGP5W/3C9JGJG
2 8JMKD3MGP5W/3C9JHD6
3 8JMKD3MGP5W/3C9JHNR
Group1 DGE-CEA-INPE-MCTI-GOV-BR
2 DGE-CEA-INPE-MCTI-GOV-BR
3 DGE-CEA-INPE-MCTI-GOV-BR
Affiliation1 Instituto Nacional de Pesquisas Espaciais (INPE)
2 Instituto Nacional de Pesquisas Espaciais (INPE)
3 Instituto Nacional de Pesquisas Espaciais (INPE)
Author e-Mail Address1 padilha@dge.inpe.br
2 icaro@dge.inpe.br
3 banik@dge.inpe.br
e-Mail Addresspadilha@dge.inpe.br
JournalGondwana Research
Volume23
Number2
Pages748-758
Secondary MarkA1 A1 A1 A2
History (UTC)2013-05-31 17:43:25 :: lattes -> administrator ::
2018-06-04 23:39:06 :: administrator -> marcelo.pazos@inpe.br :: 2013
3. Content and structure
Is the master or a copy?is the master
Content Stagecompleted
Transferable1
Content TypeExternal Contribution
Version Typepublisher
Keywordsmagnetotelluric
arc-continent collision
neoproterozoic
northern Brasilia belt
central Brazil
AbstractThe Brasília belt, in central Brazil, experienced a broad range of tectonic events, including several periods of compressional and extensional deformations during the Proterozoic. Magnetotelluric data were collected at 27 sites along a profile crossing the northern part of the belt. Strike analysis and distortion decomposition indicated that most of the data are two-dimensional (2D) and fit a regional geoelectric strike angle of N20E, parallel to the tectonic grain. 2D conductivity model is constrained by available gravity and seismic refraction data and reveals the cumulative effects of themultiple tectonomagmatic episodes that affected the area in the past on current crustal and upper mantle structure. The results show that the resistive lithospheric root of the São Francisco cratonic plate is restricted to the easternmost part of the profile and does not extend westward beneath the Brasília belt. The external zone of the fold belt, composed of slightly metamorphosed rocks at the surface, presents crustal conductors that can be tentatively interpreted as regions with fossil fluid flows at mid-crust depth beneath a gold mineralization zone and as a very shallow mineralized zone within the metamorphic rocks. The external zone is separated to the west from the Goiás massif by a strong conductivity contrast, indicative of a suture zone along the Rio Maranhão fault system. Crustal conductivity structure under the Niquelândia complex is distinct from what is observed in other parts of the Goiás massif, in agreement with the proposal of the complex being an allochthonous block. In spite of the large tectonothermal events that affected the Goiás magmatic arc there are no significant conductive anomalies at crustal depths in its eastern side. Themost prominent feature detected in the geoelectricmodel is a huge high conductivity anomaly below the entire Goiás massif in the central part of the belt, mainly concentrated at the uppermost mantle but also affecting mid to lower crustal depths. It can be interpreted as associated with thermal events either related toMesoproterozoic and/or Neoproterozoic continental rifting processes or to delamination and detachment processes at the end of the evolution of the belt, in theNeoproterozoic. Effects related to oceanic lithosphere subduction during the collision and accretion of the Goiás massif and Goiás magmatic arc to the western passive margin of the São Francisco cratonic plate in the Neoproterozoic may alternatively explain the anomaly.
AreaCEA
Arrangementurlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Deep conductivity structure...
doc Directory Contentaccess
source Directory Contentthere are no files
agreement Directory Contentthere are no files
4. Conditions of access and use
Languageen
User Grouplattes
marcelo.pazos@inpe.br
Reader Groupadministrator
marcelo.pazos@inpe.br
Visibilityshown
Archiving Policydenypublisher denyfinaldraft24
Read Permissiondeny from all and allow from 150.163
Update Permissionnot transferred
5. Allied materials
Mirror Repositoryiconet.com.br/banon/2006/11.26.21.31
Next Higher Units8JMKD3MGPCW/3EU29DP
DisseminationWEBSCI; PORTALCAPES; SCOPUS.
Host Collectiondpi.inpe.br/plutao@80/2008/08.19.15.01
6. Notes
NotesSupplementary data to this article can be found online at
http://dx.doi.org/10.1016/j.gr.2012.05.016.
Empty Fieldsalternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel format isbn lineage mark month nextedition orcid parameterlist parentrepositories previousedition previouslowerunit progress rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject targetfile tertiarymark tertiarytype url
7. Description control
e-Mail (login)marcelo.pazos@inpe.br
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