| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/44CK955 | |||
| Repository | sid.inpe.br/mtc-m21c/2021/03.22.15.50 (restricted access) | |||
| Last Update | 2021:03.22.15.50.56 (UTC) administrator | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2021/03.22.15.50.56 | |||
| Metadata Last Update | 2022:04.03.22.28.23 (UTC) administrator | |||
| DOI | 10.1016/j.margeo.2021.106454 | |||
| ISSN | 0025-3227 | |||
| Citation Key | SousaVVHCMASAS:2021:ChSePr | |||
| Title | Changes in sedimentary provenance and climate off the coast of Northeast Brazil since the Last Interglacial  | |||
| Year | 2021 | |||
| Month | May | |||
| Access Date | 2024, May 08 | |||
| Type of Work | journal article | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 4889 KiB | |||
| 2. Context | ||||
| Author | 1 Sousa, Thiago A. de 2 Venancio, Igor Martins 3 Valeriano, Cláudio de Morisson 4 Heilbron, Monica 5 Carneiro, Maria T. Weitzel Dias 6 Mane, Miguel Angelo 7 Almeida, Júlio C. Horta de 8 Smoak, Joseph M. 9 Albuquerque, Ana Luiza S. 10 Silva Filho, Emmanoel Vieira | |||
| Group | 1 2 MET-MET-DIPGR-INPE-MCTI-GOV-BR | |||
| Affiliation | 1 Universidade Federal Fluminense (UFF) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Universidade do Estado do Rio de Janeiro (UERJ) 4 Universidade do Estado do Rio de Janeiro (UERJ) 5 Universidade Federal do Espírito Santo (UFES) 6 Universidade do Estado do Rio de Janeiro (UERJ) 7 Universidade do Estado do Rio de Janeiro (UERJ) 8 University of South Florida 9 Universidade Federal Fluminense (UFF) 10 Universidade Federal Fluminense (UFF) | |||
| Author e-Mail Address | 1 tasousa.geo@gmail.com 2 igor.venancio@inpe.br | |||
| Journal | Marine Geology | |||
| Volume | 435 | |||
| Pages | e106454 | |||
| Secondary Mark | A1_GEOCIÊNCIAS A1_ENGENHARIAS_III A2_PLANEJAMENTO_URBANO_E_REGIONAL_/_DEMOGRAFIA A2_INTERDISCIPLINAR A2_CIÊNCIAS_AGRÁRIAS_I A2_BIODIVERSIDADE B1_QUÍMICA B1_FARMÁCIA B1_CIÊNCIAS_BIOLÓGICAS_I B1_BIOTECNOLOGIA B2_ENSINO | |||
| History (UTC) | 2021-03-22 15:50:56 :: simone -> administrator :: 2021-03-22 15:50:58 :: administrator -> simone :: 2021 2021-03-22 15:52:20 :: simone -> administrator :: 2021 2022-04-03 22:28:23 :: administrator -> simone :: 2021 | |||
| 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 | Rare Earth Elements Radiogenic isotopes Marine sediments Glacial/interglacial climate Northeast Brazil | |||
| Abstract | Neodymium (Nd) and strontium (Sr) isotopic signatures in marine sediments reflect the geology of the associated drainage basin from which those sediments are supplied. These signatures are significantly affected by relief, weathering, transport, and deposition of sedimentary contributions from the respective sources. This work makes available new data of SrNd isotope ratios and Rare Earth Element (REE) concentrations, which provides a record of the sedimentary provenance of marine sediment supplied to the continental slope off the coast of northeastern Brazil since the last 130 thousand years. Our results indicate the main source of sediments to this site was the Parnaíba sedimentary basin. Furthermore, the fluctuations in Fe/K, Al/Si ratios, and Sr values are explained by geochemical processes operating within the region, which likely reflects changes in the hydrological regime and relative sea-level, and intensity of weathering in continental rocks in glacial-interglacial timescales. We suggest that low values of 87Sr/86Sr ratios during glacial are a result of dry conditions. Also, minor fluctuations within the last glacial period may be a consequence of displacements of the Intertropical Convergence Zone (ITCZ). Such displacements cause changes in rainfall and consequently variations in chemical weathering which affect Sr isotopic fractionation. During past humid intervals, the low Nd (non-radiogenic) signal observed could be explained as a process of penetration of rainwater into the deepest non-radiogenic sediment and subsequent replacement of the isotopic signal in the environment in glacial-interglacial timescales. | |||
| Area | MET | |||
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > MET > Changes in sedimentary... | |||
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção a partir de 2021 > CGCT > Changes in sedimentary... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| Language | en | |||
| Target File | sousa_changes.pdf | |||
| User Group | simone | |||
| Visibility | shown | |||
| Archiving Policy | denypublisher denyfinaldraft24 | |||
| Read Permission | deny from all and allow from 150.163 | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/3F35TRS 8JMKD3MGPCW/46KUATE | |||
| Dissemination | WEBSCI; PORTALCAPES. | |||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn label lineage mark mirrorrepository nextedition notes number orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup resumeid rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarymark tertiarytype url | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||