Influence of vacancy damage on He diffusion in apatite, investigated at atomic to mineralogical scales

Gerin, Chloé; Gautheron, Cécile; Oliviero, E.; Bachelet, C.; Djimbi, Duval Mbongo; Seydoux‐Guillaume, Anne‐Magali; Tassan‐Got, L.; Sarda, Philippe; Roques, Jérôme; Garrido, F.

doi:10.1016/j.gca.2016.10.018

Cited by 71 publications

(69 citation statements)

References 41 publications

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“…A consistent observation is that the younger AHe ages are better reproduced by the model, while the older ages are underpredicted. This is consistent with our current understanding on how radiation damages repair over time and temperature and interact at high densities [ Ketcham et al ., ; Gerin et al ., ]. Despite the discrepancy between the predicted and model AHe ages, the thermal histories produced are those that best fit the observed data, considering the given uncertainty ranges.…”

Section: Resultsmentioning

confidence: 98%

Contrasting Mesozoic evolution across the boundary between on and off craton regions of the South African plateau inferred from apatite fission track and (U‐Th‐Sm)/He thermochronology

et al. 2017

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The timing and mechanisms involved in creating the elevated, low‐relief topography of the South African plateau remain unresolved. Here we constrain the thermal history of the Southwest African plateau since 300 Ma by using apatite fission track (AFT) and (U‐Th‐Sm)/He (AHe) thermochronology. Archean rocks from the center of the Kaapvaal Craton yield AFT ages of 331.0 ± 11.0 and 379.0 ± 23.0 Ma and mean track lengths (MTLs) of 11.9 ± 0.2 and 12.5 ± 0.3 µm. Toward the southwest margin of the craton and in the adjacent Paleozoic mobile belt, AFT ages are significantly younger and range from 58.9 ± 5.9 to 128.7 ± 6.3 Ma and have longer MTLs (>13 µm). The range of sample AHe ages complements the AFT ages, and single‐grain AHe ages for most samples are highly dispersed. Results from joint inverse modeling of these data reveal that the center of the craton has resided at near‐surface temperatures (<60°C) since 300 Ma, whereas the margins of the craton and the off‐craton mobile belt experienced two discrete episodes of cooling during the Cretaceous. An Early Cretaceous cooling episode is ascribed to regional denudation following continental breakup. Late Cretaceous cooling occurs regionally but is locally variable and may be a result of a complex interaction between mantle‐driven uplift and the tectonic setting of the craton margin. Across the entire plateau, samples are predicted to have remained at near‐surface temperatures throughout the Cenozoic, suggesting minimal denudation (<1 km) and relative tectonic stability of the plateau.

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Section: Resultsmentioning

confidence: 98%

Contrasting Mesozoic evolution across the boundary between on and off craton regions of the South African plateau inferred from apatite fission track and (U‐Th‐Sm)/He thermochronology

et al. 2017

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“…These contentions suggest that the possible effect of radiation damage on the AFT ages is unlikely and as such will not be explored further within this work. Single grain AHe ages from basement lithologies display high levels of age dispersion ranging between 4% and 225%. Dispersion of the AHe ages can be attributed to several possible factors; 4 He ejection (Farley, Wolf, & Silver, ), 4 He implantation (Spiegel, Kohn, Belton, Berner, & Gleadow, ), U‐ and Th‐rich mineral inclusions (Fitzgerald, Baldwin, Webb, & O'Sullivan, ; Vermeesch et al., ), zonation (Flowers & Kelley, ), fragmentation (Brown et al., ), grain size (Reiners & Farley, ) and radiation damage (Djimbi et al., ; Flowers et al., ; Gautheron et al., , ; Gerin et al., ; Shuster, Flowers, & Farley, ), all of which can augment the age and increase the level of age dispersion. In roughly half of the samples, AHe age exhibits a weak to moderate positive trend against eU, while only 4 of 28 samples exhibit a weak to moderate positive correlation between AHe age and equivalent radius (Figure and Data S1).…”

Section: Methodsmentioning

confidence: 99%

Evolution of the central West Greenland margin and the Nuussuaq Basin: Localised basin uplift along a stable continental margin proposed from thermochronological data

2018

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The Late Cenozoic is typically considered a time of widespread episodic tectonic uplift along the West Greenland continental margin (36-2 Ma), similar to other margins across the North Atlantic, such as Norway, East Greenland and the UK. The present study re-examines and remodels onshore thermochronological data from central West Greenland and the Cretaceous Nuussuaq Basin, utilising a Bayesian modelling approach and new concepts related to radiation damage within apatite. These new thermal histories indicate that slow-protracted cooling has occurred across the southern extent of the margin during the Mesozoic and Cenozoic, whereas those from within the Nuussuaq Basin display reheating through the Late Cretaceous/Palaeogene and cooling to present. Results suggest that no significant Late Cenozoic uplift has occurred along the southern margin, while cooling in the Nuussuaq Basin is consistent with events outlined in the basin's stratigraphy and implies uplift during volcanism and an isostatic response to the unroofing of the lithosphere has elevated the modern topography. These results imply significant tectonism in the region ceased by~45 Ma, yet have wider implications regarding how low temperature thermochronology data are treated and our understanding of the postrift evolution of passive margins. K E Y W O R D Smodelling, passive margins, stratigraphy, tectonics and sedimentation, thermochronology

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“…This comparison reveals that processes such as the creation of radiation damage‐induced traps significantly alter He diffusion in zircon. In addition, the impact of chemical substitution or single vacancies can be investigated using DFT (Djimbi et al, ; Gerin et al, ; Saadoune & De Leeuw, ). Thus, atomistic calculations of He diffusion in perfect crystal lattices identify parameters that alter diffusion, providing new perspectives when diffusion coefficient measurements are not available or difficult to perform.…”

Section: Advances In Thermochronometry Systematicsmentioning

confidence: 99%

“…Radiation damage impacts He diffusivity in apatite Gautheron et al, 2009;Gerin et al, 2017;Recanati et al, 2017;Shuster et al, 2006;Willett et al, 2017) 10.1029/2018TC005312 Tectonics Hurley, 1952;Reiners, 2005). Provided grains experience the same thermal history, the measured effective U concentration (eU, where eU is calculated as [U] + 0.234 * [Th] + 0.0046 * [Sm]; Gastil et al, 1967) corresponds to relative radiation damage.…”

Section: Radiation Damage and Chemistry Controls On (U-th)/he And Ft mentioning

confidence: 99%

“…In addition, new material science characterization of radiation damage using Raman spectroscopy, transmission electron microscopy, atom microprobe, and/or ion beam techniques (e.g., elastic recoil detection analysis, nuclear reaction analysis, and Rutherford backscattering spectroscopy) can refine our understanding of damage annealing. Complementary laboratory and empirical characterization of crystal damage accumulation and annealing will help improve damage-He diffusivity and FT annealing models (Gerin et al, 2017;Ginster et al, 2019;McDannell et al, 2019;Recanati et al, 2017;Willett et al, 2017).…”

Section: Theory and Systematicsmentioning

confidence: 99%

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Innovations in (U–Th)/He, Fission Track, and Trapped Charge Thermochronometry with Applications to Earthquakes, Weathering, Surface‐Mantle Connections, and the Growth and Decay of Mountains

2019

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A transformative advance in Earth science is the development of low‐temperature thermochronometry to date Earth surface processes or quantify the thermal evolution of rocks through time. Grand challenges and new directions in low‐temperature thermochronometry involve pushing the boundaries of these techniques to decipher thermal histories operative over seconds to hundreds of millions of years, in recent or deep geologic time and from the perspective of atoms to mountain belts. Here we highlight innovation in bedrock and detrital fission track, (U–Th)/He, and trapped charge thermochronometry, as well as thermal history modeling that enable fresh perspectives on Earth science problems. These developments connect low‐temperature thermochronometry tools with new users across Earth science disciplines to enable transdisciplinary research. Method advances include radiation damage and crystal chemistry influences on fission track and (U–Th)/He systematics, atomistic calculations of He diffusion, measurement protocols and numerical modeling routines in trapped charge systematics, development of 4He/3He and new (U–Th)/He thermochronometers, and multimethod approaches. New applications leverage method developments and include quantifying landscape evolution at variable temporal scales, changes to Earth's surface in deep geologic time and connections to mantle processes, the spectrum of fault processes from paleoearthquakes to slow slip and fluid flow, and paleoclimate and past critical zone evolution. These research avenues have societal implications for modern climate change, groundwater flow paths, mineral resource and petroleum systems science, and earthquake hazards.

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Influence of vacancy damage on He diffusion in apatite, investigated at atomic to mineralogical scales

Cited by 71 publications

References 41 publications

Contrasting Mesozoic evolution across the boundary between on and off craton regions of the South African plateau inferred from apatite fission track and (U‐Th‐Sm)/He thermochronology

Contrasting Mesozoic evolution across the boundary between on and off craton regions of the South African plateau inferred from apatite fission track and (U‐Th‐Sm)/He thermochronology

Evolution of the central West Greenland margin and the Nuussuaq Basin: Localised basin uplift along a stable continental margin proposed from thermochronological data

Innovations in (U–Th)/He, Fission Track, and Trapped Charge Thermochronometry with Applications to Earthquakes, Weathering, Surface‐Mantle Connections, and the Growth and Decay of Mountains

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