Relict olivine grains, chondrule recycling, and implications for the chemical, thermal, and mechanical processing of nebular materials

Ruzicka, A.; Floss, C.; Hutson, M. L.

doi:10.1016/j.gca.2008.08.017

Cited by 54 publications

(108 citation statements)

References 66 publications

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“…Finally, it is worth noting that if Fe enters the molten mesostasis from the gas phase (i.e., a solubility process) or from ferroan rims, this will dilute the other siderophile elements (SE metal = Ni, Co, Cr, P) dissolved in the melt from the Fe-Ni metal blebs by disturbing the Fe/SE metal ratio. This dilution effect may explain in turn the lower Ni and Co contents measured in the bulk composition of type II chondrules compared with their type I equivalents while keeping the Co/Ni ratio closed to chondritic (Grossman and Wasson, 1985;Ruzicka et al, 2008 and (Jones, 1990(Jones, , 1994Rubin, 2003, Ruzicka et al, 2012; and our experimental data point towards a relatively short duration, for the formation of type IIA chondrules. The heating time required to form ferroan olivines from magnesian ones by oxidation of Fe metal, and by extension to form type IIA chondrules from type IA chondrules or their fragments, can be quantified as follows.…”

Section: Implications On Conditions Of Chondrule Formationmentioning

confidence: 49%

“…18). The same observation can be made in chondrules since relict forsterites in type II chondrules are almost ubiquitous in most of the chondrite groups (Rambaldi, 1981;Miyamoto, et al 1986;Steele, 1986;Jones, 1990;Wasson and Rubin, 2003;Ruzicka et al, 2007Ruzicka et al, , 2008 (Jones and Scott, 1989;Taylor and Cirlin, 1986), from 0.131 to 0.28 in LL3.1 Bishunpur, from 0.10 to 0.18 in LL3.2 Krymka, from 0.019 to 0.09 in LL3.4 Chainpur (Taylor and Cirlin, 1986;Lofgren and Le, 1998), or of carbonaceous chondrites from 0.06 to 0.26 (Taylor and Cirlin, 1986). In contrast, K D values in type IIA chondrules mainly scatter between ≈ 0.2 to ≈ 0.5 at around near equilibrium values or higher up to ≈ 0.9 (Taylor and Cirlin, 1986;Jones, 1990;Symes and Lofgren, 1999).…”

Section: Kinetic Considerationsmentioning

confidence: 55%

“…Sears et al, 1996;Jones et al, 2005;Ruzicka et al, 2008 and. Large heterogeneities among type I and type II chondrules of ordinary chondrites, particularly in terms of their olivine compositions ( Fig.…”

Section: Introductionmentioning

confidence: 98%

“…The origin of chondrules precursors is also a key question. Did current chondrule precursors form from condensate dusts and/or liquid condensates from the nebula gas, from the recycling of previous generations of chondrules or chondrule-like materials, or from disrupted planetesimals (see reviews in Wood, 1996;Zanda, 2004;Lauretta et al, 2006;Jones et al, 2005;Hewins et al, 2005;Libourel and Krot, 2007;Ruzicka et al, 2008;Ruzicka, 2012)? The other central question of whether the heating mechanism was an astrophysical process or a planetary process is still a matter of debate, though heating by nebular shock (e.g., Desch and Connolly 2002;Ciesla, 2005;5 Morris and Desch, 2010;Desh et al, 2012;Morris et al, 2012) is currently one of the most favored mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies Schrader et al, 2008;Ruzicka et al, 2008) have shown that type II chondrules could have been derived from type I chondrules by oxidation. We have conducted a set of experiments aimed at heating type I chondrule proxies under oxidizing conditions to test whether this pathway is feasible.…”

Section: Introductionmentioning

confidence: 99%

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Relationships between type I and type II chondrules: Implications on chondrule formation processes

Villeneuve

Libourel

Soulié

2015

Geochimica et Cosmochimica Acta

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Please cite this article as: Villeneuve, J., Libourel, G., Soulié, C., Relationships between type I and type II chondrules: Implications on chondrule formation processes, Geochimica et Cosmochimica Acta (2015), doi: http://dx.doi.org/ 10.1016/j.gca. 2015.03.033 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Implications On Conditions Of Chondrule Formationmentioning

confidence: 49%

Section: Kinetic Considerationsmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Villeneuve

Libourel

Soulié

2015

Geochimica et Cosmochimica Acta

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Comparison and calibration of nonheating paleointensity methods: A case study using dusty olivine

Lappe

Feinberg

Muxworthy

et al. 2013

Geochem Geophys Geosyst

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[1] We present a comparative study of nonheating paleointensity methods, with the aim of determining the optimum method for obtaining paleointensities from ''dusty olivine'' in chondritic meteorites. The REM method, whereby thermoremanent magnetization (TRM) is normalized by saturation isothermal remanent magnetization (SIRM), is shown to ''over normalize'' TRM in dusty olivine due to the transformation of stable single-vortex (SV) states to metastable single-domain (SD) states in a saturating field. The problem of over normalization is reduced in the REMc and REM' methods, which more effectively isolate the high-coercivity stable SD component of remanence. A calibration factor of f ¼ 1600 (1000 < f < 2900) is derived for the REM' method. Anhysteric remanent magnetization (ARM) is shown to be a near perfect analogue of TRM in the stable SD component of dusty olivine. ARM normalization of the high-coercivity (100-150 mT) remanence with a calibration factor f ARM ¼ 0.91 (0.7 < f ARM < 1.2) yields paleofield estimates within 6 30% of the actual field values for SD dominated samples. A Preisach method for simulating TRM acquisition using information extracted from first-order reversal curve (FORC) diagrams is shown to work well for SD dominated samples, but fails when there is a large proportion of SV remanence carriers. The failure occurs because (1) SV states are not properly incorporated into the Preisach distribution of remanence carriers, and (2) the acquisition of TRM by SV states is not properly modeled by the underlying SD thermal relaxation theory.

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Chondrule Properties and Formation Conditions

Marrocchi,

Jones,

Russell

et al. 2024

Space Sci Rev

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Chondrules are iconic sub-millimeter spheroids representing the most abundant high-temperature dust formed during the evolution of the circumsolar disk. Chondrules have been the subject of a great deal of research, but no consensus has yet emerged as to their formation conditions. In particular, the question of whether chondrules are of nebular or planetary origin remains largely debated. Building upon decades of chondrule investigation and recent headways in combining petrographic observations and O−Ti−Cr isotopic compositions, we here propose a comprehensive vision of chondrule formation. This holistic approach points toward a nebular origin of both NC and CC chondrules, with repetitive high-temperature recycling processes controlling the petrographic and isotopic diversities shown by chondrules. Chondrule precursors correspond to mixing between (i) early-formed refractory inclusions ± NC-like dust and (ii) previous generation of chondrules ± CI-like material. Chondrule formation took place under open conditions with gas-melt interactions with multi-species gas (H2O, Mg, SiO) playing a key role for establishing their characteristics. Petrographic and isotopic systematics do not support disk-wide transport of chondrules but point toward local formation of chondrules within their respective accretion reservoirs. Altogether, this shows that several generations of genetically-related chondrules (i.e., deriving from each other) co-exist in chondrites. In addition to supporting the nebular brand of chondrule-forming scenarios, this argues for repetitive and extremely localized heating events for producing chondrules.

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Relict olivine grains, chondrule recycling, and implications for the chemical, thermal, and mechanical processing of nebular materials

Cited by 54 publications

References 66 publications

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Comparison and calibration of nonheating paleointensity methods: A case study using dusty olivine

Chondrule Properties and Formation Conditions

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