Please use this identifier to cite or link to this item: https://rigeo.cprm.gov.br/handle/doc/21327
Full metadata record
DC FieldValueLanguage
dc.contributor.authorIZA, Edgar Romeo Herrera de Figueiredo-
dc.contributor.authorHORBE, Adriana Maria Coimbra-
dc.contributor.authorCASTRO, Cassiano Costa e-
dc.contributor.authorHERRERA, Isabel Leonor Iza Echeverria-
dc.date2018-08-18-
dc.date.accessioned2019-10-02T20:11:00Z-
dc.date.available2019-10-02T20:11:00Z-
dc.identifier.citationIZA, Edgar Romeo Herrera de Figueiredo; HORBE, Adriana Maria Coimbra; CASTRO, Cassiano Costa e; HERRERA , Isabel Leonor Iza Echeverria. Integration of geochemical and geophysical data to characterize and map lateritic regolith: an example in the Brazilian Amazon. Geochemistry, Geophysics, Geosystems, [S. l], v. 19, n. 9, p. 2873-3604, 2018. Disponível em: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2017GC007352. Acesso em: 2 out. 2019.pt_BR
dc.identifier.urihttps://rigeo.cprm.gov.br/handle/doc/21327-
dc.description.abstractIn tropical regions like the Amazon, there are extensive lateritic covers that have not been properly mapped, despite their economic-bearing minerals and their importance related to denudation and regolith landscape studies. To consolidate tools for regolith cartography, geochemical and geophysical data (airborne gamma ray spectrometry and magnetometry) were integrated. Regional indexes (including the weathering intensity index, WII; lateritic index, LI; and mafic index, MI) were generated and applied, which allowed for the identification of regolith properties. The WII highlighted areas with high weathering levels located between 149 and 300 m and between 500 and 627 m of altitude that are related to the lower planation surface and upper planation surfaces, respectively. The LI ratified the WII and highlighted areas with high Th/K and U/K ratios, associated with lateritic duricrusts. The correlation between LI and MI showed lateritic duricrusts related to mafic and felsic substrates, especially on altitudes below 300 m, which confirmed the geochemical data. All of these results lead to the reinterpretation of areas previously considered to be sedimentary as residuals associated with oxisols and lateritic duricrusts, and this allows us to propose that the regolith mapping techniques and model generation (weathering intensity and lateritic indexes) have a good level of reliability.pt_BR
dc.language.isoen_USpt_BR
dc.subjectGEOFÍSICApt_BR
dc.subjectGEOQUÍMICApt_BR
dc.subjectRECURSOS MINERAISpt_BR
dc.titleIntegration of geochemical and geophysical data to characterize and map lateritic regolith: an example in the Brazilian Amazonpt_BR
dc.typeArticlept_BR
dc.local[S.l.]pt_BR
dc.description.embargo2019-10-03-
dc.subject.enGEOPHYSICALpt_BR
dc.subject.enGEOCHEMICALpt_BR
dc.subject.enMINERALSpt_BR
Appears in Collections:Artigos de Periódicos

Files in This Item:
File Description SizeFormat 
geochemical_geophysical_amazon.pdfArtigo7,72 MBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.