1. Identity statement | |
Reference Type | Journal Article |
Site | plutao.sid.inpe.br |
Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
Identifier | J8LNKAN8RW/3E7UGK5 |
Repository | dpi.inpe.br/plutao/2013/05.31.17.43.24 (restricted access) |
Last Update | 2013:08.01.18.03.07 (UTC) administrator |
Metadata Repository | dpi.inpe.br/plutao/2013/05.31.17.43.25 |
Metadata Last Update | 2018:06.04.23.39.06 (UTC) administrator |
DOI | 10.1016/j.gr.2012.05.016 |
ISSN | 1342-937X |
Label | lattes: 0842543237562135 1 PadilhaVitoPádu:2013:EvNeAr |
Citation Key | PadilhaVitoPádu:2013:EvNeAr |
Title | Deep conductivity structure beneath the northern Brasília belt, central Brazil: Evidence for a Neoproterozoic arc-continent collision |
Project | CNPq (472517/2006-6, 302347/2008-9, 303813/2009-1). |
Year | 2013 |
Access Date | 2024, Mar. 28 |
Type of Work | journal article |
Secondary Type | PRE PI |
Number of Files | 1 |
Size | 1287 KiB |
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2. Context | |
Author | 1 Padilha, Antonio Lopes 2 Vitorello, Icaro 3 Pádua, Marcelo Banik de |
Resume Identifier | 1 8JMKD3MGP5W/3C9JGJG 2 8JMKD3MGP5W/3C9JHD6 3 8JMKD3MGP5W/3C9JHNR |
Group | 1 DGE-CEA-INPE-MCTI-GOV-BR 2 DGE-CEA-INPE-MCTI-GOV-BR 3 DGE-CEA-INPE-MCTI-GOV-BR |
Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Instituto Nacional de Pesquisas Espaciais (INPE) |
Author e-Mail Address | 1 padilha@dge.inpe.br 2 icaro@dge.inpe.br 3 banik@dge.inpe.br |
e-Mail Address | padilha@dge.inpe.br |
Journal | Gondwana Research |
Volume | 23 |
Number | 2 |
Pages | 748-758 |
Secondary Mark | A1 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 |
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3. Content and structure | |
Is the master or a copy? | is the master |
Content Stage | completed |
Transferable | 1 |
Content Type | External Contribution |
Version Type | publisher |
Keywords | magnetotelluric arc-continent collision neoproterozoic northern Brasilia belt central Brazil |
Abstract | The 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. |
Area | CEA |
Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Deep conductivity structure... |
doc Directory Content | access |
source Directory Content | there are no files |
agreement Directory Content | there are no files |
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4. Conditions of access and use | |
Language | en |
User Group | lattes marcelo.pazos@inpe.br |
Reader Group | administrator marcelo.pazos@inpe.br |
Visibility | shown |
Archiving Policy | denypublisher denyfinaldraft24 |
Read Permission | deny from all and allow from 150.163 |
Update Permission | not transferred |
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5. Allied materials | |
Mirror Repository | iconet.com.br/banon/2006/11.26.21.31 |
Next Higher Units | 8JMKD3MGPCW/3EU29DP |
Dissemination | WEBSCI; PORTALCAPES; SCOPUS. |
Host Collection | dpi.inpe.br/plutao@80/2008/08.19.15.01 |
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6. Notes | |
Notes | Supplementary data to this article can be found online at http://dx.doi.org/10.1016/j.gr.2012.05.016. |
Empty Fields | alternatejournal 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 |
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7. Description control | |
e-Mail (login) | marcelo.pazos@inpe.br |
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