| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m21b.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34P/3PFBKML | |||
| Repository | sid.inpe.br/mtc-m21b/2017/08.18.18.39 (restricted access) | |||
| Last Update | 2017:08.18.18.39.34 (UTC) simone | |||
| Metadata Repository | sid.inpe.br/mtc-m21b/2017/08.18.18.39.34 | |||
| Metadata Last Update | 2018:06.04.02.27.45 (UTC) administrator | |||
| DOI | 10.1016/j.geomorph.2017.07.026 | |||
| ISSN | 0169-555X | |||
| Citation Key | RossettiVaGrCoTaYe:2017:ImLaHo | |||
| Title | The imprint of Late Holocene tectonic reactivation on a megafan landscape in the northern Amazonian wetlands  | |||
| Year | 2017 | |||
| Month | Oct. | |||
| Access Date | 2024, Apr. 29 | |||
| Type of Work | journal article | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 4234 KiB | |||
| 2. Context | ||||
| Author | 1 Rossetti, Dilce de Fátima 2 Valeriano, Márcio de Morisson 3 Gribel, R. 4 Cohen, M. C. L. 5 Tatumi, Sonia H. 6 Yeed, M. | |||
| Resume Identifier | 1 8JMKD3MGP5W/3C9JGTQ 2 8JMKD3MGP5W/3C9JHPL | |||
| Group | 1 DIDSR-CGOBT-INPE-MCTIC-GOV-BR 2 DIDSR-CGOBT-INPE-MCTIC-GOV-BR | |||
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Instituto Nacional de Pesquisas da Amazônia (INPA) 4 Universidade Federal do Pará (UFPA) 5 Universidade Federal de São Paulo (UNIFESP) 6 Universidade Federal de São Paulo (UNIFESP) | |||
| Author e-Mail Address | 1 dilce.rossetti@inpe.br 2 marcio.valeriano@inpe.br | |||
| Journal | Geomorphology | |||
| Volume | 295 | |||
| Pages | 406-418 | |||
| Secondary Mark | A1_INTERDISCIPLINAR A1_GEOGRAFIA A1_GEOCIÊNCIAS A1_ENGENHARIAS_I A1_CIÊNCIAS_AGRÁRIAS_I A2_ENGENHARIAS_III A2_BIODIVERSIDADE B1_CIÊNCIAS_BIOLÓGICAS_I B1_ANTROPOLOGIA_/_ARQUEOLOGIA B2_ASTRONOMIA_/_FÍSICA | |||
| History (UTC) | 2017-08-18 18:39:34 :: simone -> administrator :: 2017-08-18 18:39:35 :: administrator -> simone :: 2017 2017-08-18 18:40:19 :: simone -> administrator :: 2017 2018-01-09 11:46:57 :: administrator -> simone :: 2017 2018-01-09 17:40:06 :: simone -> administrator :: 2017 2018-06-04 02:27:45 :: administrator -> simone :: 2017 | |||
| 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 | Megafan paleolandorm Northern Amazonia Neotectonics Late Holocene | |||
| Abstract | The modern Amazonian ecosystem outcomes from the complex interplay of different factors performed over the geological history, with tectonics being long speculated as perhaps a fundamental one. Nevertheless, areas where tectonic activity can be fully characterized are still scarce in view of the large dimension of this region. In this work, we investigate the signature of neotectonics in one megafan paleolandform that typifies a large sector of the Negro-Branco basin in northern Amazonia. The approach joined regional morphostructural descriptions of the Viruá megafan surface and the acquisition of topographic, sedimentological, and chronological data focusing on the central sector of the megafan. The results revealed an abundance of rivers that form dendritic, subdendritic, and trellis patterns. These rivers also have numerous straight segments, orthogonal junctions, and orthogonal shifts in courses. Structural lineaments, defined by straight channels and also straight lake margins, are aligned along the NW-SE and NE-SW directions that are coincidental with the main regional structural pattern in Amazonia. This study also led to recognize two large areas of lower topography in the south-central part of the megafan that consist of rectangular depressions parallel to the morphostructural lineaments. A sedimentological survey indicated that cores extracted external to the largest depression have only distributary channel and overbank sand sheet megafan deposits. Optically stimulated luminescence (OSL) ages ranged from 17.5 ± 2.0 to 46.9 ± 3.4 ky and radiocarbon ages ranged from 5.95.7 to 20.119.6 cal ky BP. In contrast, cores extracted within the depression consisted of fluvial deposits younger than 2.11.9 cal ky BP that increased in thickness toward the central part of the depression. We propose that the studied megafan was affected by tectonic reactivation until at least a couple thousand years ago. Tectonics would have produced subsiding areas more prone to flooding than adjacent terrains, which constituted sites for renewed deposition of fluvial sediments reworked from the megafan surface following its abandonment. A comparison of our data with those from other Amazonian areas with similar records of late Holocene tectonics suggests a landscape imprinted by faulting, probably of strike-slip motion. This finding increases the record of neotectonic activity in the Amazonian wetlands and may be useful in studies aiming at discussing the origin and extension of late Holocene deformation in the South American intraplate. In addition, we present a megafan with an unusual development in a cratonic region under the combined effect of climate and tectonics. | |||
| Area | SRE | |||
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > The imprint of... | |||
| 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 | rossetti_imprint.pdf | |||
| User Group | simone | |||
| Reader Group | administrator 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/3ER446E | |||
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.54.54 1 sid.inpe.br/mtc-m21/2012/07.13.14.44.37 1 | |||
| Dissemination | WEBSCI; PORTALCAPES; COMPENDEX; SCOPUS. | |||
| Host Collection | sid.inpe.br/mtc-m21b/2013/09.26.14.25.20 | |||
| 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 rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarymark tertiarytype url | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||