Use of UV-curable acrylates gels as mounting media for palynological samples

Noetinger, Sol; Pujana, Roberto R.; Burrieza, Alfredo; Burrieza, Hernán Pablo

doi:10.22179/revmacn.19.482

Cited by 38 publications

(14 citation statements)

References 6 publications

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“…The organic residue was concentrated using standard methods with hydrochloric and hydrofluoric acids and sieved with a 20 µm filter. As mounting media of the palynological slides (at least five of each sample), it was followed the proposal of Noetinger et al (2017).…”

Section: Methodsmentioning

confidence: 99%

New Record of the Lueckisporites/Weylandites Biozone (Permian) in the Paganzo Basin, Argentina: Stratigraphic Significance

et al. 2022

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We present the first palynological assemblages collected from the fine-grained variegated beds that overlie the De La Cuesta Formation at Puerta de Las Angosturas, Sierra de Narváez, (Catamarca Province), Argentina. Five samples from two different stratigraphic levels provided spores, non-taeniate, taeniate, and sulcate pollen grains referred to the Lueckisporites/Weylandites (LW) Biozone. The palynofloras are equivalent to those previously reported for the Los Jumes area and, therefore, the variegated sequences that overlie the De La Cuesta Formation at both flanks of the Sierra de Narváez are entirely equivalent, not only lithologically but also in fossiliferous content and age. These assemblages are analogous to those recently described in the Valle Hermoso area (La Rioja Province) and isotopically dated at 278.84 ± 0.22 Ma (Kungurian) and can be used as a key stratigraphic horizon to link the initial phases of the Permian volcanism along the southwestern margin of Gondwana and the sedimentation in the retroarc basins. The recognition of diagnostic taxa of the LW Biozone confirms earlier correlations with the Striatites Biozone of the Chacoparaná Basin and the Lv Biozone from Brazil. The different ages recently reported for the succession herein analyzed in Sierra de Narváez and La Veteada Formation suggest that these units should not be correlated. Moreover, while the strata overlying the De La Cuesta Formation records the Permian post-orogenic sedimentation in the Paganzo Basin, the La Veteada Formation accounts for the transition to the rifting conditions that characterized the Triassic basins of northwestern Argentina.

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Section: Methodsmentioning

confidence: 99%

New Record of the Lueckisporites/Weylandites Biozone (Permian) in the Paganzo Basin, Argentina: Stratigraphic Significance

et al. 2022

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“…The sedimentary OM analysis was performed using a Rock-Eval 6 pyrolysis (Vinci Technology), available at the University of Lausanne, Switzerland, described in [59,60]. About 50-60 mg of sample powder was analyzed for each paleosols horizon and lacustrine deposit.…”

Section: Methodsmentioning

confidence: 99%

“…The method is based on the stepwise pyrolysis and combustion of OM, releasing CO and CO 2 gases monitored by a flame ionization detector (FID) for pyrolysis and an infrared detector (IR) for combustion under an artificial air supply (N 2 O 2 20/80). TOC content, Hydrogen Index (HI) and Oxygen Index (OI) were calculated by integrating the amounts of hydrocarbon compounds (HC), CO, and CO 2 produced during thermal cracking of OM and oxidative decomposition of carbonate, between defined temperature limits [59,60]. Although 69 bulk samples of the MAF were analyzed, two of them were dismissed because TOC values were extremely high (29.77 and 27.38%, respectively).…”

Section: Methodsmentioning

confidence: 99%

Carbon Isotopic Signature and Organic Matter Composition of Cenomanian High-Latitude Paleosols of Southern Patagonia

et al. 2021

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The Cenomanian Mata Amarilla Formation (MAF) in southern Patagonia (⁓55° S paleolatitude, Austral-Magallanes Basin, Argentina) is composed mainly of stacked fluvial deposits with intercalated paleosols, which document Cenomanian environments at high-paleolatitudes in the Southern Hemisphere. We performed a multiproxy study of the paleosols and sediments of the MAF in order to (1) understand the composition of the soil- and sediment-derived organic matter (OM), (2) apply carbon isotope stratigraphy as a tool to correlate patterns obtained from the MAF with existing marine and non-marine δ13Corg records worldwide, and (3) investigate the relationship between variations in spore-pollen assemblages of the MAF and the climatic conditions prevailing in the Cenomanian Southern Hemisphere. An integrated dataset was generated, including total organic carbon content, Rock-Eval pyrolysis data,stable isotope (δ13Corg) composition, and palynological data, combined with published paleosol-derived mean annual temperatures and mean annual precipitations. The results indicated that the OM preserved in the MAF paleosols allowed its use as a chemostratigraphic tool. The MAF δ13Corg curve showed the rather stable pattern characteristic for the Early to Late Cenomanian interval. The absence of the major positive carbon isotope excursion associated with oceanic anoxic event 2 provided an upper limit for the stratigraphic range of the MAF. The palynological data suggested the development of fern prairies during warmer and moister periods at the expense of the background gymnosperm-dominated forests. Overall, the multiproxy record provided new insights into the long-term environmental conditions during the Cenomanian in the high latitudes of the Southern Hemisphere.

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“…The spores were obtained mechanically removing sori with a dissection needle. For its observation with optic microscope, the material was mounted on a slide using Noetinger et al (2017) methodology. For observation under Scanning Electron Microscopy (SEM), the materials were mounted on an aluminum peg using adhesive film and coated with gold-palladium.…”

Section: Preparation Of Samples and Observationmentioning

confidence: 99%

Eupolypod ferns with dryopteroid/thelypteroid traits from Arroyo Chacay (Huitrera Formation, Eocene), Río Negro Province, Argentina

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et al. 2021

Review of Palaeobotany and Palynology

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Use of UV-curable acrylates gels as mounting media for palynological samples

Cited by 38 publications

References 6 publications

New Record of the Lueckisporites/Weylandites Biozone (Permian) in the Paganzo Basin, Argentina: Stratigraphic Significance

New Record of the Lueckisporites/Weylandites Biozone (Permian) in the Paganzo Basin, Argentina: Stratigraphic Significance

Carbon Isotopic Signature and Organic Matter Composition of Cenomanian High-Latitude Paleosols of Southern Patagonia

Eupolypod ferns with dryopteroid/thelypteroid traits from Arroyo Chacay (Huitrera Formation, Eocene), Río Negro Province, Argentina

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