A new approach for electron microprobe zircon fission track thermochronology

Dias, Airton Natanael Coelho; Chemale, Farid; Soares, Carlos José; Guedes, S.

doi:10.1016/j.chemgeo.2017.04.014

Cited by 11 publications

(3 citation statements)

References 35 publications

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“…For absolute methods of determining neutron fluence (Soares et al, ), the efficiency should be constant when counting tracks in unknown age samples. The fast‐growing areas of FTD using the Laser Ablation Inductively Couple Plasma Mass Spectrometer (LA‐ICP‐MS, [Hadler et al, ; Hasebe, Barbarand, Jarvis, Carter, & Hurford, ; Soares et al, ; Soares, Mertz‐Kraus, Guedes, Stockli, & Zack, ]) or the electron microprobe (Dias, Chemale, Soares, & Guedes, ; Gombosi, Garver, & Baldwin, ) have the same efficiency issues, and could also benefit from automatic counting.…”

Section: Discussionmentioning

confidence: 99%

Segmentation of nearly isotropic overlapped tracks in photomicrographs using successive erosions as watershed markers

Siqueira

Nakasuga

Guedes

et al. 2019

Microscopy Res & Technique

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Introduction Procedures for measuring and counting tracks are time‐consuming and involve practical problems. The precision of automatic counting methods is not satisfactory yet; the major challenges are distinguishing tracks and material defects, identifying small tracks and defects of similar size, and detecting overlapping tracks. Materials and Methods Here, we address the overlapping tracks issue using the algorithm Watershed Using Successive Erosions as Markers (WUSEM), which combines the watershed transform, morphological erosions and labeling to separate regions in photomicrographs. We tested this method in two data sets of diallyl phthalate (DAP) photomicrographs and compared the results when counting manually and using the classic watershed and H‐watershed transforms. Results The mean automatic/manual efficiency counting ratio when using WUSEM in the test data sets is 0.97 ± 0.11. Conclusion WUSEM shows reliable results when used in photomicrographs presenting almost isotropic objects. Also, diameter and eccentricity criteria may be used to increase the reliability of this method.

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Section: Discussionmentioning

confidence: 99%

Segmentation of nearly isotropic overlapped tracks in photomicrographs using successive erosions as watershed markers

Siqueira

Nakasuga

Guedes

et al. 2019

Microscopy Res & Technique

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“…For FT analyses, the samples were irradiated in the nuclear reactor of IPEN/CNEN in São Paulo State, Brazil. Methodological information can be found in Dias et al (, , ) and Dias (2012).…”

Section: Methodsmentioning

confidence: 99%

“…The time of the adequate etching can be different for each sample (Garver, 2003). The zircon FT ages were obtained from the Methodological information can be found in Dias et al (2011Dias et al ( , 2010Dias et al ( , 2017 and Dias (2012).…”

Section: Methodsmentioning

confidence: 99%

Fission track and U–Pb double dating of detrital zircon applied to the intracratonic Mesozoic Bauru Basin, Brazil

et al. 2017

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Coupled fission‐track and U–Pb analyses of detrital zircons are presented. A Cretaceous intracratonic basin formed between 93 to 60 Ma, the Bauru Basin, is investigated to distinguish its provenance and information about the main orogenetic events of the South American Platform. The results of U–Pb zircon dating suggest that Rhyacian (Transamazonian Cycle, 2.3–2.05 Ga), Statherian (1.8–1 Ga), Sunsás (1.2–0.9 Ga), Tonian (Early Brasiliano, 1 to 0.85 Ga) and Brasiliano (0.65 to 0.50 Ga) terranes and units are the main source areas. The fission‐track data provide important evidence of cooling during the Early Brasiliano and Brasiliano periods and yields 2 main Paleozoic age populations, one between 500 and 360 Ma and the other between 345 and 230 Ma. These populations were interpreted as resulting from different tectonic events along the western margin of the South American Platform that affected the platform's internal composition by uplift and exhumation.

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Fission Track Cooling Ages in the Brazilian Central Plateau Linked to Orogenies and Continental Break-Up

Martins-Ferreira

Dias

Chemale

et al. 2022

Advances in Geophysics, Tectonics and Petroleum Geosciences

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A new approach for electron microprobe zircon fission track thermochronology

Cited by 11 publications

References 35 publications

Segmentation of nearly isotropic overlapped tracks in photomicrographs using successive erosions as watershed markers

Segmentation of nearly isotropic overlapped tracks in photomicrographs using successive erosions as watershed markers

Fission track and U–Pb double dating of detrital zircon applied to the intracratonic Mesozoic Bauru Basin, Brazil

Fission Track Cooling Ages in the Brazilian Central Plateau Linked to Orogenies and Continental Break-Up

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