Thermoluminescence and compositional zoning in the mesostasis of a Semarkona group A1 chondrule and new insights into the chondrule-forming process

Matsunami, S.; Ninagawa, K.; Nishimura, S.; Kubono, Noriko; Yamamoto, Isao; Kohata, Masaki; Wada, T.; Yamashita, Y; Lü, Junfu; Sears, D. W. G.; Nishimura, Hiroshi

doi:10.1016/0016-7037(93)90096-f

Cited by 66 publications

(65 citation statements)

References 23 publications

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“…Sears et al, 1996;Hewins et al, 2005;Jones et al, 2005;Alexander et al, 2008;Alexander and Ebel, 2012;, a number of arguments based on chemical (e.g. Matsunami et al, 1993;Nagahara et al, 1999;Libourel et al, 2003;Libourel et al, 2006;Krot et al, 2004), isotopic (e.g. Thiemens, 1996;Clayton, 2004;Chaussidon et al, 2008;Libourel and Chaussidon, 2011) and experimental (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Alexander et al, 2000;Alexander and Wang, 2001;Yu et al, 2003;Lauretta et al, 2006;Alexander et al, 2008;Fedkin et al, 2012), (ii) metal grains in dusty olivines (Nipoor) and metal in type I chondrules (Ni-rich) do not have the same origin and thus could not have been formed simultaneously by an evaporation/reduction process (e.g. Rambaldi and Wasson, 1981;Leroux et al, 2003;Hewins et al, 2005), (iii) chemical gradients of volatiles and moderately volatiles elements in chondrule mesostasis and occurrence of mineralogical zoning in some chondrules argue in favor of condensation rather than evaporation processes (Matsunami et al, 1993;Nagahara et al, 1999;Libourel et al, 2003, Libourel et al, 2006Krot et al, 2004;Alexander et al , 2008;.…”

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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“…Textures-Many of the zoned chondrules selected for our study or noted elsewhere in the literature have classic type I porphyritic textures, as described by Jones and Scott (1989) and Jones (1994), ranging from porphyritic olivine (PO; chondrules 3-3a, plus the one in Matsunami et al, 1993) to porphyritic Olivine-pyroxene (POP; chondrules 7-24, l-2b, 7x-l) to porphyritic pyroxene (PP; chondrules 7-2 and 7-30). Indeed, these chondrules could have been used to draft Fig.…”

Section: Petrology Of Zoned Chondrulesmentioning

confidence: 99%

“…Unlike the previously mentioned evidence of secondary processing at high temperatures, there does not appear to be any straightforward way of explaining Matsunami's zoned chondrule through parent-body processing. An abstract by Nagahara et al (1999) discusses two more zoned Semarkona chondrules, and interprets their compositional gradients as the product of direct condensation of major elements to liquid during crystallization (environment (A)), followed by subsolidus entry ofalkalis and inward diffusion along the same lines outlined by Matsunami et al (1993). Interpretations such as these can help constrain the mechanism of chondrule formation and the environment in which they formed.…”

Section: Introductionmentioning

confidence: 99%

Zoned chondrules in Semarkona: Evidence for high‐ and low‐temperature processing

Grossman

Alexander

Wang

et al. 2002

Meteorit & Planetary Scien

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Abstract-At least 15% of the 10w-FeO chondrules in Semarkona (LL3.0) have mesostases that are concentrically zoned in Na, with enrichments near the outer margins. We have studied zoned chondrules using electron microprobe methods (x-ray mapping plus quantitative analysis), ion microprobe analysis for trace elements and hydrogen isotopes, cathodoluminescence imaging, and transmission electron microscopy in order to determine what these objects can tell us about the environment in which chondrules formed and evolved.Mesostases in these chondrules are strongly zoned in all moderately volatile elements and H (interpreted as water). Calcium is depleted in areas ofvolatile enrichment. Titanium and Cr generally decrease toward the chondrule surfaces, whereas Al and Si may either increase or decrease, generally in opposite directions to one another; Mn follows Na in some chondru1es but not in others; Fe and Mg are unzoned. D/H ratios increase in the water-rich areas of zoned chondrules. Mesostasis shows cathodoluminescence zoning in most zoned chondrules, with the brightest yellow color near the outside. Mesostasis in zoned chondrules appears to be glassy, with no evidence for devitrification.Systematic variations in zoning patterns among pyroxene-and olivine-rich chondrules may indicate that fractionation oflow-and high-Ca pyroxene played some role in Ti, Cr, Mn, Si, AI, and some Ca zoning. But direct condensation ofelements into hot chondrules, secondary melting oflate condensates into the outer portions of chondrules, and subsolidus diffusion of elements into warm chondrules cannot account for the sub-parallel zoning profiles ofmany elements, the presence ofH20, or elemental abundance patterns.Zoning ofmoderately volatile elements and Ca may have been produced by hydration of chondrule glass without devitrification during aqueous alteration on the parent asteroid. This could have induced structural changes in the glass allowing rapid diffusion and exchange of elements between altered glass and surrounding matrix and rim material. Calcium was mainly lost during this process, and other nonvolatile elements may have been mobile as well. Some unzoned, 10w-FeO chondrules appear to have fully altered mesostasis.

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“…Induced thermoluminescence (TL) properties have been uniquely successful in evaluating the nature and metamorphic history of ordinary chondrites, CM chondrites, CV chondrites, and CO chondrites, E chondrites, lunar samples, and basaltic meteorites (Sears et al , 1982(Sears et al , 1991a(Sears et al , 1991b(Sears et al , 1995bSears and Weeks 1983;Guimon et al 1984Guimon et al , 1985Guimon et al , 1995Guimon et al , 1988Keck and Sears 1987;Keck et al 1987;Ninagawa et al 1992;Matsunami et al 1993). Essentially, TL is the light produced by a substance as it is heated and it depends on crystal structure and the presence of defects and impurities (e.g., Mn 2+ in Ca sites in feldspar, or Mn 2+ and Cr 3+ in forsterite or enstatite, cause luminescence, Fe 2+ is a quencher).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Antarctic micrometeorites by thermoluminescence

Sedaghatpour

Sears

2009

Meteorit & Planetary Scien

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Abstract-In order to explore the nature and history of micrometeorites, we have measured the thermoluminescence (TL) properties of four micrometeorites, three cosmic spherules, and one irregular scoriaceous particle, that we found in a survey of 17 micrometeorites. These micrometeorites have TL sensitivities ranging from 0.017 ± 0.002 to 0.087 ± 0.009 (on a scale normalized to 4 mg of the H3.9 chondrite Dhajala). The four micrometeorites have very similar TL peak temperatures and TL peak widths, and these distinguish them from CI, most CM, CV, CO, and ordinary chondrites. However, the TL properties of these micrometeorites closely resemble those of the unusual CM chondrite MacAlpine Hills (MAC) 87300 and terrestrial forsterites. Heating experiments on submillimeter chips of a CM chondrite and a H5 chondrite suggest that these TL properties are have not been significantly affected by atmospheric passage. Thus we suggest that there is no simple linkage between these micrometeorites and the established meteorite classes, and that forsterite is an important component of these micrometeorites, as it is in many primitive solar system materials.

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Thermoluminescence and compositional zoning in the mesostasis of a Semarkona group A1 chondrule and new insights into the chondrule-forming process

Cited by 66 publications

References 23 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

Zoned chondrules in Semarkona: Evidence for high‐ and low‐temperature processing

Characterization of Antarctic micrometeorites by thermoluminescence

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