Provenance of Pliocene and recent sedimentary deposits in western Amazônia, Brazil: Consequences for the paleodrainage of the Solimões-Amazonas River

Horbe, Adriana Maria Coimbra; Motta, Marcelo Batista; Almeida, Carolina Michelin de; Dantas, Elton Luiz; Vieira, Lucieth Cruz

doi:10.1016/j.sedgeo.2013.07.007

Cited by 36 publications

(39 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…and lies unconformably on the Solimões Formation (Campbell et al, 2006). This formation is analogous to the Peruvian Madre de Dios Formation set between the Ucayali peneplanation unconformity, that marks the Quechua II tectonic phase at Miocene, and the Pleistocene-Holocene deposits, both dated by trapped ash deposits in sediments (Campbell et al, 2006;Horbe et al, 2013;Rossetti et al, 2005). Weathering occurred in the different formations throughout the Amazon Basin.…”

Section: Geologymentioning

confidence: 95%

“…The stratigraphic column for Amazon Basin shows unconformities underlying and overlying the Upper Cretaceous Alter do Chão Formation followed by lateritization. This suggests periods of quiescent tectonic conditions and favorable climate resulting in low denudation rates and development of weathering profile (Horbe et al, 2013).…”

Section: Geologymentioning

confidence: 99%

“…The Purus Arch acts as a topographic divide in the Miocene controlling the sedimentation of Solimões Formation and some rivers flow eastwards (Milani and Zalan, 1999). The period when Amazonas River established its current course and onset the Amazonas Fan is still debated but would have occurred at most during Miocene at~11 Ma (Figueiredo et al, 2009;Figueiredo et al, 2007;Heinrich and Zonneveld, 2013;Horbe et al, 2013). An extensive area of central Amazonia is covered by the Içá Formation (9.5-2.5 Ma), which occurs around 100-140 m a.s.l.…”

Section: Geologymentioning

confidence: 99%

See 2 more Smart Citations

Combined dating of goethites and kaolinites from ferruginous duricrusts. Deciphering the Late Neogene erosion history of Central Amazonia

et al. 2018

View full text Add to dashboard Cite

This study focuses on the dating of millimetric pisoliths from ferruginous duricrusts located in central Amazonia (Brazil), by coupling detailed mineralogy and two relevant dating methods: (i) (U-Th)/He analysis of goethites by mass spectrometry; (ii) analysis of radiation-induced defects of kaolinites embedded in duricrusts by electron paramagnetic resonance spectroscopy (EPR). Three samples collected at different elevations in the landscape were selected. The goethite corrected ages range from 1.1-15.2 Ma and consistently increase with elevation. EPR was performed on kaolinites after several cycles of a deferration procedure. Considering extreme geochemical scenarii, the ages of kaolinites are 1.7-7.1 Ma for a closed system and 4.0-16.7 Ma for an open system with 100% Rn loss. Ages of goethites and kaolinites are close, in the limit of the uncertainty of the methods. They show important periods of duricrust formation at Middle Miocene and at Late Miocene/Pliocene. Data allow the estimation of lowering rates between 3 and 8 m/Ma, in agreement with independent data available in the literature for the central Amazonia region or even for erosion of other cratons in the world. The two dating methods can be compared on common duricrust samples. By revealing single or multi-step weathering/erosion episodes related to relictual paleosurfaces, they also bring promising contributions to an advanced knowledge of ancient and complex lateritic geosystems.

show abstract

Section: Geologymentioning

confidence: 95%

Section: Geologymentioning

confidence: 99%

Section: Geologymentioning

confidence: 99%

See 1 more Smart Citation

Combined dating of goethites and kaolinites from ferruginous duricrusts. Deciphering the Late Neogene erosion history of Central Amazonia

et al. 2018

View full text Add to dashboard Cite

show abstract

“…This barrier later became incised by the expanding river system in the Late Miocene, and a connection with the eastern Amazonas was established (e.g., Hoorn et al, 1995). The Iquitos Arch, which is located further to the west of the Solimões basin, was probably incised at a later stage, although estimations of the exact timing also vary here (e.g., Horbe et al, 2013;Roddaz et al, 2005aRoddaz et al, , 2005b due to a lack of precise stratigraphic dating. The resulting increase in erosion and sediment transport from the Andes toward the east resulted in a substantial increase in sediment deposition near the Amazon mouth since either 11.8-10.5 Ma (Figueiredo et al, 2010(Figueiredo et al, , 2009 or 9.5-8.3 Ma (Gorini et al, 2014).…”

Section: Introductionmentioning

confidence: 97%

A 30 Ma history of the Amazon River inferred from terrigenous sediments and organic matter on the Ceará Rise

Soelen

Kim

Santos

et al. 2017

Earth and Planetary Science Letters

Self Cite

View full text Add to dashboard Cite

The history of the Amazon River is a much-discussed subject, and the timing of the development of a transcontinental system in particular is a matter of some controversy, with estimations varying between the Early Miocene and the Pliocene or even the Pleistocene. To shed further light on this, we studied the sediment provenance of an Oligocene to Late Pleistocene marine sedimentary section from the Ceará Rise (ODP Site 925), a topographic high in the central Atlantic Ocean, using major element concentrations and Nd isotopic composition in 85 samples. In addition, the carbon isotopic composition of bulk organic matter and changes in the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) were used to identify periods of increased river outflow. On the basis of these results, we suggest that the history of the development of the Amazon River is characterized by specific steps. During the late Oligocene/Early Miocene (30-18.3 Ma), the terrigenous mass accumulation rates (TARs) were high, and sediment and GDGT compositions suggest that a large river system existed, which at times received weathering products from a younger and probably Andean sediment source. A shift to a younger Andean sediment provenance after 8.7 Ma indicates that the Amazon River became permanently connected with the Andes. Between 18.3 and 4.5 Ma, TARs were generally low, and GDGTs were derived for the most part from in situ production in marine waters. Around 4.5 Ma, the river expanded, probably due to ongoing tectonic activity, and uplift in the Andes increased Andean rock erosion. This led to a strong increase in terrigenous sediment deposition and enhanced organic matter preservation on the Ceará Rise, and the delivery of terrestrial (both soil and riverine) branched GDGTs to the Ceará Rise.

show abstract

“…Neo-tectonic reactivations occurred during this period along the Negro and Amazon Rivers [172][173][174]. Also, studies of Neogene sediments from the Ecuadorian [175] and Amazon [176] Basins, together with the fourfold increase of sedimentation rates in the Amazon Fan 2.4 MYA [126], also indicate that important and complex changes in the Amazon Basin drainage occurred during the Pleistocene. Rossetti et al, [135] estimated a maximum age of 43,000 YA for the Quaternary terrace deposits along the Amazon River.…”

Section: Miocene and Pliocene Amazon Biodiversity Hypotheses For The mentioning

confidence: 99%

Continuous Miocene, Pliocene and Pleistocene Influences on Mitochondrial Diversification of the Capybara (Hydrochoerus Hydrochoeris; Hydrochoeridae, Rodentia): Incapacity to Determine Exclusive Hypotheses on the Origins of the Amazon and Orinoco Diversity for This Species

Ruiz‐García¹,

Luengas-Villamil²,

Pinedo-Castro³

et al. 2016

J Phylogenetics Evol Biol

View full text Add to dashboard Cite

The capybara (Hydrochoerus hydrochoeris) is the largest rodent on the world and it is strongly linked to the river systems of a large fraction of South America and part of Central America (Panama). Thus, it is an interesting species to test hypotheses about the origin of the high biodiversity within the Amazon Basin and in a sizeable fraction of the Neotropics. To test these hypotheses, we sequenced two mitochondrial genes (control region and Cytochrome b) of 78 wild capybaras sampled in Colombia, Peru, Ecuador and Brazil. At least, five different "populations" or ESUs were detected in well delimited geographical areas. However, our results do not support the more recent view that two different species of capybara are present (H. hydrochoeris and H. isthmus), unless chromosomal speciation (stasipatric or parapatric) can be demonstrated between these two groups. A Bayesian tree with the aforementioned two mitochondrial genes, and another Bayesian tree with a subset of 25 capybaras for 10 mitochondrial genes, showed that the initial diversification of the mitochondrial haplotype in capybaras was initiated in the Late Miocene. The trees also showed that the other haplotype diversification processes extended into the Pliocene and Pleistocene. We also detected population expansion events during different moments of the Pleistocene. Although some authors strongly suggest that the Miocene diversification explains the extreme biodiversity in the Amazon Basin and in surroundings areas (for instance, the Paleogeography hypothesis), others consider it the result of available forest refugia (Refuge hypothesis) during the Pleistocene. However, our results suggest that both hypotheses (and others, such as the Riverrefuge, the Recent Lagoon and the Hydrogeological Recent Change hypotheses) could have affected the evolution of the capybara to generate the current mitochondrial diversity. Thus, it is difficult to generalize a unique Amazon biota diversification hypothesis because each species or taxon could be affected by different processes and because the temporal antiquity of each taxon in South America is also different. Many mammalian taxa, and others, migrated into South America during the Great American Biotic Interchange (GABI) and their diversification processes in South America were mainly driven by Pleistocene events as those proposed by the Refuge hypothesis. Older taxa within this continent could have begun their current genetics diversification processes earlier, such as in the case of the capybara.

show abstract

Provenance of Pliocene and recent sedimentary deposits in western Amazônia, Brazil: Consequences for the paleodrainage of the Solimões-Amazonas River

Cited by 36 publications

References 26 publications

Combined dating of goethites and kaolinites from ferruginous duricrusts. Deciphering the Late Neogene erosion history of Central Amazonia

Combined dating of goethites and kaolinites from ferruginous duricrusts. Deciphering the Late Neogene erosion history of Central Amazonia

A 30 Ma history of the Amazon River inferred from terrigenous sediments and organic matter on the Ceará Rise

Continuous Miocene, Pliocene and Pleistocene Influences on Mitochondrial Diversification of the Capybara (Hydrochoerus Hydrochoeris; Hydrochoeridae, Rodentia): Incapacity to Determine Exclusive Hypotheses on the Origins of the Amazon and Orinoco Diversity for This Species

Contact Info

Product

Resources

About