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1. Identity statement
Reference TypeJournal Article
Sitemtc-m21c.sid.inpe.br
Holder Codeisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identifier8JMKD3MGP3W34R/3TUEKG5
Repositorysid.inpe.br/mtc-m21c/2019/09.02.17.20   (restricted access)
Last Update2019:09.02.17.20.45 (UTC) simone
Metadata Repositorysid.inpe.br/mtc-m21c/2019/09.02.17.20.45
Metadata Last Update2020:01.06.11.42.18 (UTC) administrator
DOI10.1016/j.precamres.2019.105416
ISSN0301-9268
Citation KeyPadilhaVitoPáduFuck:2019:MaImPa
TitleMagnetotelluric images of Paleoproterozoic accretion and Mesoproterozoic to Neoproterozoic reworking processes in the northern São Francisco Craton, central-eastern Brazil
Year2019
MonthOct.
Access Date2024, May 17
Type of Workjournal article
Secondary TypePRE PI
Number of Files1
Size6693 KiB
2. Context
Author1 Padilha, Antonio Lopes
2 Vitorello, Ícaro
3 Pádua, Marcelo Banik de
4 Fuck, Reinhardt A.
Resume Identifier1 8JMKD3MGP5W/3C9JGJG
2 8JMKD3MGP5W/3C9JHD6
3 8JMKD3MGP5W/3C9JHNR
Group1 DIDGE-CGCEA-INPE-MCTIC-GOV-BR
2 DIDGE-CGCEA-INPE-MCTIC-GOV-BR
3 DIDGE-CGCEA-INPE-MCTIC-GOV-BR
Affiliation1 Instituto Nacional de Pesquisas Espaciais (INPE)
2 Instituto Nacional de Pesquisas Espaciais (INPE)
3 Instituto Nacional de Pesquisas Espaciais (INPE)
4 Universidade de Brasília (UnB)
Author e-Mail Address1 antonio.padilha@inpe.br
2
3 marcelo.banik@inpe.br
JournalPrecambrian Research
Volume333
Pages105416
Secondary MarkA1_INTERDISCIPLINAR A1_GEOCIÊNCIAS A1_CIÊNCIAS_AMBIENTAIS A2_QUÍMICA A2_ENGENHARIAS_II A2_ENGENHARIAS_I A2_CIÊNCIAS_BIOLÓGICAS_I A2_BIODIVERSIDADE B1_MATERIAIS
History (UTC)2019-09-02 17:20:45 :: simone -> administrator ::
2019-09-02 17:20:46 :: administrator -> simone :: 2019
2019-09-02 17:21:07 :: simone -> administrator :: 2019
2019-09-04 14:13:00 :: administrator -> simone :: 2019
2019-12-07 19:49:01 :: simone -> administrator :: 2019
2020-01-06 11:42:18 :: administrator -> simone :: 2019
3. Content and structure
Is the master or a copy?is the master
Content Stagecompleted
Transferable1
Content TypeExternal Contribution
Version Typepublisher
KeywordsNorthern São Francisco Craton
Magnetotellurics
Paleoproterozoic accretion
Mantle refertilization
AbstractBroadband and long period magnetotelluric (MT) data were collected along an east-west oriented, 580-km-longprofile across the northern São Francisco Craton where extensive Proterozoic and Phanerozoic sedimentarycover and lack of deep-probing geophysical surveys have prevented to establish unequivocally the cratoniccharacter of the Archean-Paleoproterozoic lithosphere. Following dimensionality analyses, the MT dataset wasinterpreted using both 2-D and 3-D inversion procedures. The near-surface structure is better resolved in the 2-Dmodel due to itsfiner resolution. A huge upper crustal conductor is found all along the shallow earlyNeoproterozoic Irecê Basin in the central domain of the craton, extending laterally for approximately 150 kmand restricting signal propagation below the basin. Its high conductance is explained by a combination of highporosity and highfluid salinity in the sedimentary package. Another upper crustal conductor is observed on thewest side of the profile, interpreted as fractured metasedimentary rocks of the Rio Preto belt thrusted on top ofthe craton basement during Neoproterozoic marginal collision. The 3-D model explains significantly better themeasured data related to deep structure. Contrary to what is expected for a stable cratonic block, the geoelectricmodel shows pronounced electrical complexity and heterogeneity, an indication that the cratonic lithospherewas multiply reworked in the past by tectonothermal events. Different lithospheric resistive blocks bounded bymajor conductive zones are identified. Constrained by geochemical and isotopic data, these vertical conductiveinterfaces are interpreted as cryptic suture zones due to large-scale amalgamation of continents and micro-continents leading to the assembly of the São Francisco Craton in the Paleoproterozoic. The conductivity en-hancement is more likely explained by emplacement of sulfides along previous suture zones during maficmagmatism. At upper mantle depths, high conductivity observed below most of the profile indicates that me-tasomatism or refertilization processes with incompatible elements caused by the Paleoproterozoic subductingslabs and Mesoproterozoic to Neoproterozoic upwelling of deepfluids and melts reworked this portion of thecraton mantle.
AreaCEA
Arrangementurlib.net > DIDGE > Magnetotelluric images of...
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4. Conditions of access and use
Languageen
Target Filepadilha_magnetotelluric.pdf
User Groupsimone
Reader Groupadministrator
simone
Visibilityshown
Archiving Policydenypublisher denyfinaldraft24
Read Permissiondeny from all and allow from 150.163
Update Permissionnot transferred
5. Allied materials
Next Higher Units8JMKD3MGPCW/3EU29DP
Citing Item Listsid.inpe.br/mtc-m21/2012/07.13.14.50.10 12
sid.inpe.br/bibdigital/2013/10.01.22.11 3
sid.inpe.br/mtc-m21/2012/07.13.14.40.26 2
DisseminationWEBSCI; PORTALCAPES; MGA; COMPENDEX; SCOPUS.
Host Collectionurlib.net/www/2017/11.22.19.04
6. Notes
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