U/Pb geochronology of fossil fish dentine from Romualdo Formation, Araripe Basin, northeast of Brazil

Barreto, Alcina Magnólia Franca; Bertotti, Anelise Losangela; Sylvester, Paul J.; Prado, Ludmila Alves Cadeira do; Araripe, Rilda Verônica Cardoso de; Oliveira, David Holanda de; Tomé, Maria Emília Travassos Rios; Lemos, Flávia Azevedo Pedrosa; Nascimento, Luis R.L. do; Pereira, Priscilla Albuquerque; Albayrak, Ali Ihsan

doi:10.1016/j.jsames.2022.103774

Cited by 13 publications

(9 citation statements)

References 31 publications

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“…The other Upper Cretaceous vertebrate‐bearing strata in Mongolia are poorly time‐constrained as well as the Nemegt Formation, and therefore, the U–Pb dating in combination with the Y‐screening method on dinosaur teeth (Greene et al, 2018) can be a useful tool for constructing a rigorous temporal and stratigraphical framework. The tremendous fossil record of the Upper Cretaceous Mongolian strata combined with the framework built upon radiometric dating will greatly expand its paleontological importance not only in Asia but also other areas such as North and South America (e.g., Barreto et al, 2022; Greene et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Accurate dating of strata using radiometric dating such as K-Ar and U-Pb techniques is required to achieve this goal. The in-situ U-Pb dating of fossil apatite in teeth is one of those methods and has been recently used to constrain the depositional ages of poorly time-constrained strata (e.g., Barreto et al, 2022;Fassett et al, 2011;Greene et al, 2018;Grün et al, 2008Grün et al, , 2014Sano et al, 2006;Sano & Terada, 1999, 2001. This method utilizes U taken up through a diagenetic fluid when bioapatites are generally transformed from hydroxylapatite to fluorapatite with crystal coarsening and cementing of pore spaces during fossilization (e.g., Herwartz et al, 2011;Kohn, 2008;Samoilov & Smirnova, 2000;Trueman & Tuross, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Apatite U–Pb dating of dinosaur teeth from the Upper Cretaceous Nemegt Formation in the Gobi Desert, Mongolia: Contribution to depositional age constraints

et al. 2023

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The Nemegt Formation in the Gobi Desert, Mongolia, hosts abundant dinosaur and other vertebrate remains, the ages of which are uncertain due to a lack of radioactive dating. In order to more strictly constrain the depositional age of Nemegt Formation, we conducted U–Pb isotope, trace elements, and Y‐screening analyses using laser‐ablation inductively‐coupled plasma‐mass spectrometry (LA‐ICP‐MS) on apatites of five Tarbosaurus bataar teeth collected from the middle Nemegt Formation. As a result, the age of 66.7 ± 2.5 Ma was obtained from one of the samples which is suggested to be least affected by secondary alteration of the U distribution, and this can be interpreted as a lower limit for fossilization of the tooth samples. Combined with the previously suggested relative age of the Nemegt Formation based on faunal occurrences, our data supports the deposition of the middle–upper Nemegt Formation during the Maastrichtian stage. Given that the depositional age of the Nemegt Formation has not been examined by isotope dating directly using fossils and minerals from the formation, this study is the first to report that the depositional ages of the vertebrate‐bearing strata in the Gobi can be discussed by fossil apatite U–Pb dating in combination with the Y‐screening method.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Apatite U–Pb dating of dinosaur teeth from the Upper Cretaceous Nemegt Formation in the Gobi Desert, Mongolia: Contribution to depositional age constraints

et al. 2023

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“…The precise age of the deposits of this group is the subject of considerable debate (e.g. 7,15,18,19,[23][24][25] ). Though typically assigned to the Aptian, several studies place the upper part of this unit (Romualdo Formation) in the Aptian-Albian interval (e.g.…”

Section: Geological Settingmentioning

confidence: 99%

Early Aptian marine incursions in the interior of northeastern Brazil following the Gondwana breakup

Fauth

Kern

Villegas‐Martín

et al. 2023

Sci Rep

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This study reports a set of primeval marine incursions identified in two drill cores, 1PS-06-CE, and 1PS-10-CE, which recovered the Barbalha Formation, Araripe Basin, Brazil. Based on a multi-proxy approach involving stratigraphy, microbiofacies, ichnofossils, and microfossils, three short-lived marine incursions were identified, designated Araripe Marine Incursions (AMI) 1–3. AMI-1 and AMI-2, which occur within the shales of the Batateira Beds (lower part of the Barbalha Formation), were identified by the occurrence of benthonic foraminifera, calcareous nannofossils, dinocysts, and a mass mortality event of non-marine ostracods. AMI-3 was recognized in the upper part of the Barbalha Formation, based on the occurrence of ichnofossils and planktonic foraminifera. The observation of the planktonic foraminifera genus Leupoldina for the first time in the basin indicates early Aptian/early late Aptian age for these deposits, and the first opportunity of correlation with global foraminifera biozonation. Our findings have implications for the breakup of the Gondwana Supercontinent, as these incursions represent the earliest marine-derived flooding events in the inland basins of northeastern Brazil.

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“…praelippa , Hedbergella sigali , Blesfucuiana cf. cumulus ), suggests a late Aptian age for the intermediate portion of the Romualdo Formation (Melo et al., 2020), whereas radiometric dating (U‐Pb date obtained from Cladocyclus gardneri dentine) indicates an early Albian age for its upper interval (Barreto et al., 2022). This implies that the Romualdo Formation was deposited contemporaneously with the occurrence of the OAE‐1b cluster.…”

Section: Introductionmentioning

confidence: 99%

Fossil‐Bearing Concretions of the Araripe Basin Accumulated During Oceanic Anoxic Event 1b

Bom,

Kochhann,

Heimhofer

et al. 2023

Paleoceanog and Paleoclimatol

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Fossils from the Araripe Basin (northeastern Brazil) are known for their remarkable preservation of vertebrates and invertebrates, even including soft tissues. They occur in carbonate concretions within organic carbon‐rich strata assigned to the Romualdo Formation. Here we present integrated stable isotope, elemental and microfossil records from the Sítio Sobradinho outcrop, Araripe Basin, northeastern Brazil. Our results imply that black shales hosting fossil‐bearing carbonate concretions within the lower Romualdo Formation were deposited during Oceanic Anoxic Event (OAE) 1b (Kilian sub‐event). Our high‐resolution multi‐proxy approach allows identifying four phases of environmental evolution. After a pre‐event phase, an early phase (onset of the negative carbon isotope excursion—nCIE) of water column stratification and reduced oxygenation likely preconditioned the system for organic carbon burial and preservation. A second phase (peak nCIE) was characterized by an intensified hydrological cycle and continental runoff, as well as increased influx of terrestrial organic matter. High input of continent‐derived nutrients might have enhanced biological productivity in the epicontinental sea, ultimately leading to increased organic carbon fluxes and burial, as well as carbonate dissolution at the seafloor. All together, these paleoenvironmental conditions resulted in expansion of an oxygen minimum zone (OMZ), favoring taphonomic processes that led to the excellent preservation of diverse macro‐ and microfossils. The nCIE recovery phase was characterized by reduced nutrient supply and organic carbon burial. Organic carbon sequestration in such paleoenvironments likely contributed to the recovery (increase) of stable carbon isotope (δ13C) records in the deep ocean during the Kilian sub‐event of OAE 1b.

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U/Pb geochronology of fossil fish dentine from Romualdo Formation, Araripe Basin, northeast of Brazil

Cited by 13 publications

References 31 publications

Apatite U–Pb dating of dinosaur teeth from the Upper Cretaceous Nemegt Formation in the Gobi Desert, Mongolia: Contribution to depositional age constraints

Apatite U–Pb dating of dinosaur teeth from the Upper Cretaceous Nemegt Formation in the Gobi Desert, Mongolia: Contribution to depositional age constraints

Early Aptian marine incursions in the interior of northeastern Brazil following the Gondwana breakup

Fossil‐Bearing Concretions of the Araripe Basin Accumulated During Oceanic Anoxic Event 1b

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