Effect of composition on helium diffusion in fluoroapatites investigated with nuclear reaction analysis

Miro, S.; Studer, F.; Costantini, Jean Marc; Haussy, J.; Trouslard, P.; Grob, Jean‐Jacques

doi:10.1016/j.jnucmat.2006.04.004

Cited by 32 publications

(28 citation statements)

References 13 publications

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“…7 that the closure temperature for the random Cl arrangement depends significantly on the Cl-content. The dependence of He-diffusion coefficients on chemical composition in apatite has been rejected by Wolf et al (1998), but more recent analyses (Miro et al, 2006) seem to support our result. Additionally, Min et al (2003) report He-diffusion coefficients for 3.4-3.6 wt.% Cl-apatite grains (i.e., >50% Cl atom), which have retentive values; the closure temperature estimated for the same grain size and cooling rate as used in this study is around 96°C.…”

Section: Impact On the Closure Temperaturesupporting

confidence: 50%

“…The effect of chemical composition on He diffusion has been scarcely studied so far (Wolf et al, 1998;Miro et al, 2006;Min et al, 2003Min et al, , 2013 but the measurements seem to evidence some differences compared to the standard Durango apatite, especially for marked chemical differences. However, no consensus exists on the impact of chemical composition on He diffusion in apatite (Farley, 2002).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of apatite chemical composition on (U-Th)/He thermochronometry: An atomistic point of view

Djimbi

Gautheron

Roques

et al. 2015

Geochimica et Cosmochimica Acta

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Section: Impact On the Closure Temperaturesupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Impact of apatite chemical composition on (U-Th)/He thermochronometry: An atomistic point of view

Djimbi

Gautheron

Roques

et al. 2015

Geochimica et Cosmochimica Acta

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“…Analyses were performed at the 4 MeV Dynamitron accelerator at the University at Albany. This nuclear reaction has been used to measure 3 He in a variety of minerals and ceramic materials, including apatite (e.g., Miro et al, 2006;Cherniak et al, 2009), zircon (Cherniak et al, 2009), zirconia (Gosset et al, 2002;Costantini et al, 2003;Trocellier et al, 2003a,b), britholite (Costantini et al, 2002;Gosset et al, 2002;Trocellier et al, 2003a;Gosset and Trocellier, 2005), titanite (Cherniak and Watson, 2011), rutile (Cherniak and Watson, 2011), and garnet (Roselieb et al, 2006). The protons produced in the reaction, along with backscattered deuterons and products of various (d,p) and (d,a) reactions induced with light elements contained in the sample, were detected with a solid state surface barrier detector with 1500 lm depletion depth and 100 mm 2 area positioned at 167.5°with respect to the incident beam.…”

Section: Ion Implantation and Diffusion Experimentsmentioning

confidence: 99%

“…Direct profiling to characterize diffusion of implanted 3 He and 4 He in a range of phosphates, oxides and silicates has been undertaken using the techniques of nuclear reaction analysis (NRA) and Elastic Recoil Detection (ERD) (e.g., Ouchani et al, 1998;Costantini et al, 2002;Gosset et al, 2002;Trocellier et al, 2003a,b;Miro et al, 2006Miro et al, , 2007Cherniak et al, 2009;Cherniak and Watson, 2011). These investigations complement the findings from bulk release experiments and provide additional constraints on He diffusion.…”

Section: Introductionmentioning

confidence: 99%

Diffusion of helium in olivine at 1 atm and 2.7 GPa

Cherniak

Watson

2012

Geochimica et Cosmochimica Acta

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“…Analyses were performed at the 4 MeV Dynamitron accelerator at the University at Albany. This nuclear reaction has been used to measure 3 He in a variety of minerals and ceramic materials (e.g., Gosset et al, 2002;Costantini et al, 2003;Trocellier et al, 2003;Miro et al, 2006;Cherniak et al, 2009;Cherniak and Watson, 2011, 2012. The protons produced in the reaction, along with backscattered deuterons and products of various (d,p) and (d,a) reactions induced with light elements contained in the samples, were detected with a solid state surface barrier detector with 1500 lm depletion depth and 100 mm 2 area positioned at 167.5°with respect to the incident beam.…”

mentioning

confidence: 99%

Diffusion of helium in carbonates: Effects of mineral structure and composition

Cherniak

Amidon

Hobbs

et al. 2015

Geochimica et Cosmochimica Acta

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Diffusion of helium has been characterized in four carbonates: calcite, dolomite, magnesite, and aragonite. Cleaved or oriented and polished slabs of carbonate minerals were implanted with 100 keV or 3 MeV 3 He at doses of 5 Â 10 15 3 He/cm 2 and 1 Â 10 16 3 He/cm 2 , respectively, and annealed in 1-atm furnaces. 3 He distributions following diffusion experiments were measured with nuclear reaction analysis using the reaction 3 He(d,p) 4 He.Our results show that He diffusion in calcite is the fastest among the carbonates studied, with diffusivities progressively slower in magnesite, dolomite and aragonite. In the case of the isomorphic trigonal carbonates (calcite, dolomite, magnesite), these observations are broadly consistent with predictions based on lattice characteristics such as unit cell size and inter-atomic apertures, with diffusivities faster in more open carbonate structures. Dolomite is an exception to this trend, suggesting that its unique ordered R3 crystal structure may play a role in slowing helium diffusion. Diffusion is anisotropic in all of the trigonal carbonates, and is typically slowest for diffusion along the c direction, and faster for diffusion normal to c and in directions normal to cleavage surfaces. The patterns of diffusional anisotropy are predicted to first order by the size of limiting inter-atomic apertures along any given crystallographic direction, providing additional support to the concept of modeling crystal lattices as "molecular sieves" with regard to diffusion of helium.When the effects of anisotropy and diffusion domain size are considered, our results are in reasonable agreement with previous results from bulk degassing of natural samples. Modeling of helium diffusive loss shows that calcite and magnesite are unlikely to be retentive of helium on the Earth's surface for typical grain sizes and time/temperature conditions. Dolomite and aragonite may be retentive under cooler conditions, but because helium retention is strongly dependent on diffusion domain size, general predictions are difficult given the structural complexities of natural samples. Our axis-specific diffusion measurements across a range of carbonate compositions, evaluated through direct profiling, offer important constraints for modeling helium mobility in carbonates, and for understanding the influence of the complexities of carbonate structures on He outgassing patterns.

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Effect of composition on helium diffusion in fluoroapatites investigated with nuclear reaction analysis

Cited by 32 publications

References 13 publications

Impact of apatite chemical composition on (U-Th)/He thermochronometry: An atomistic point of view

Impact of apatite chemical composition on (U-Th)/He thermochronometry: An atomistic point of view

Diffusion of helium in olivine at 1 atm and 2.7 GPa

Diffusion of helium in carbonates: Effects of mineral structure and composition

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