Nepheline and sodalite in the matrix of the Ningqiang carbonaceous chondrite: Implications for formation through parent-body processes

Matsumoto, Megumi; Tomeoka, Kazushige; Seto, Yusuke; Miyake, Akira; Sugita, Mitsuhiro

doi:10.1016/j.gca.2013.11.016

Cited by 13 publications

(8 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 ). Ca-Fe pyroxene, wollastonite, andradite, and feldspathoid, analyzed in CV and CO chondrites ( 3 , 13 , 25 – 27 ), all show the same ranges of chemical variations as those observed in the Kudryavy fumarolic rocks. Ca-rich pyroxenes varying from diopside to hedenbergite compositions in Kudryavy incrustations encompass the same range of compositions as the one observed in CV and CO carbonaceous chondrites.…”

Section: Resultsmentioning

confidence: 65%

“…Both settings are characterized by heterogeneous textures of alteration with evidence for metasomatism (secondary phases) generally restricted to distances of a few hundred micrometers. Ca-Fe–rich silicates, Fe oxides, sulfides, Na-Al-Cl–rich feldspathoid phases in both carbonaceous chondrites ( 6 – 8 , 13 , 27 , 29 ), and Kudryavy fumarolic rocks ( 20 , 23 , 30 ) are intimately associated under similar types of texture ( Figs. 1 and 2 ): (i) overgrowth or pseudomorph on preexisting minerals, replacement of glassy or crystallized preexisting phases in matrix, chondrule mesostases, and refractory inclusions or in microlithic groundmass and phenocrysts; (ii) micrometer-sized porous polycrystalline patches dispersed in the fine-grained matrix; (iii) fine veinlets forming imbricated network in the matrix or inclusions; and (iv) larger delineated area (veins or dark inclusions) showing radial or lateral mineralogical zoning.…”

Section: Resultsmentioning

confidence: 98%

“…From textural and mineralogical observations and chemical analyses, Bischoff ( 17 ) found evidence for these secondary phases to have originated from preaccretionary aqueous alteration processes that occurred in small precursor planetesimals before formation of the final parent bodies, an intermediate model between gas-solid interaction in the nebula and processes that occurred in the parent body. The debate was stirred up again on the basis of the thermodynamic modeling of mineral equilibria and the oxygen isotopic composition when it was suggested that secondary phases (i.e., Ca-Fe-rich pyroxenes, andradite, fayalite, phyllosilicates, and magnetite) resulted from low temperatures (<300°C) aqueous fluid-rock interaction in an asteroidal setting ( 3 , 13 ), in which reduced and oxidized CV chondrites witness different physicochemical conditions. This low-temperature model has been challenged recently ( 8 ) by showing that Ca-Fe–rich phases in reduced and oxidized CV have formed at higher temperature (210° to 610°C, and possibly higher) and in similar reduced conditions near the iron-magnetite redox buffer under low aSiO 2 [log(aSiO 2 ) < −1].…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Fumarolic-like activity on carbonaceous chondrite parent body

Ganino

Libourel

2020

Sci. Adv.

View full text Add to dashboard Cite

Comparative planetology studies are key for understanding the main processes driving planetary formation and evolution. None have been yet applied to pristine asteroids formed in the solar protoplanetary disk, mainly because of their comminution during their 4.5-billion-year collisional lifetime. From remarkable textural, mineralogical, chemical, and thermodynamic similarities, we show that the high-temperature Kudryavy volcano fumarolic environment from Kurile Islands is a likely proxy of the Fe-alkali-halogen metasomatism on the CV and CO carbonaceous chondrite parent bodies. Ca-Fe–rich and Na-Al-Cl–rich secondary silicates in CV and CO chondrites are, thus, inferred to be fumarolic-like incrustations that precipitate from hot and reduced hydrothermal vapors after interactions with the wallrocks during buoyancy-driven Darcy flow percolation. These vapors may originate from the progressive heating and devolatilization of a chondritic protolith on their parent body or are remnant of the cooling of residual local nebular gases at the time of their primary planetesimal accretion.

show abstract

Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Fumarolic-like activity on carbonaceous chondrite parent body

Ganino

Libourel

2020

Sci. Adv.

View full text Add to dashboard Cite

show abstract

“…1 and Supplementary Fig. 1 ; refs 3 , 53 ). Referred as evidences for an alkali-halogen metasomatism in CV3 chondrites of still an unknown nature, it is however difficult to evaluate if they crystallized prior to, simultaneously with, or clearly after the Ca-Fe secondary phases, showing the need of a dedicated study on this topic.…”

Section: Resultsmentioning

confidence: 99%

Reduced and unstratified crust in CV chondrite parent body

Ganino

Libourel

2017

Nat Commun

View full text Add to dashboard Cite

Early Solar System planetesimal thermal models predict the heating of the chondritic protolith and the preservation of a chondritic crust on differentiated parent bodies. Petrological and geochemical analyses of chondrites have suggested that secondary alteration phases formed at low temperatures (<300 °C) by fluid-rock interaction where reduced and oxidized Vigarano type Carbonaceous (CV) chondrites witness different physicochemical conditions. From a thermodynamical survey of Ca-Fe-rich secondary phases in CV3 chondrites including silica activity (aSiO2), here we show that the classical distinction between reduced and oxidized chondrites is no longer valid and that their Ca-Fe-rich secondary phases formed in similar reduced conditions near the iron-magnetite redox buffer at low aSiO2 (log(aSiO2) <−1) and moderate temperature (210–610 °C). The various lithologies in CV3 chondrites are inferred to be fragments of an asteroid percolated heterogeneously via porous flow of hydrothermal fluid. Putative ‘onion shell’ structures are not anymore a requirement for the CV parent body crust.

show abstract

“…The brightness and contrast of the images were adjusted, using a software (ImageJ) [27]. The reciprocal lattice was evaluated and the zone axes were finally obtained, using the ReciPro software which can calculate the relation between the orientation of the crystals and 2D diffraction patterns [28,29]. In addition, the schematic drawing of the crystal structures was illustrated by a software (VESTA) [30].…”

Section: Methodsmentioning

confidence: 99%

Growth of SrB4O7 Crystal Fibers along the c-Axis by Micro-Pulling-Down Method

2021

View full text Add to dashboard Cite

SrB4O7 (SBO) receives much attention as solid-state ultraviolet lasers for micro-machining, photochemical synthesis, and laser spectroscopy. For the application of SBO, the SBO crystals require the control of twinning to amplify the conversion light. We also expected that the inhibitation of the SrB2O4 appearance was essential. Here, we show the growth of SBO crystals along the c-axis through the micro-pulling-down method while alternating the application of electric fields (E). Without the application, single crystals were grown. At E ≧ 400 V/cm no needle domains of SrB2O4 inside SBO crystals existed; however, composition planes were formed and twin boundaries did not appear. In contrast, the inversion of surface morphology emerged, and the convex size was especially large at 1000 V/cm. These results demonstrate that convection is generated perpendicular to the growth front by alternating the application of electric fields. This surface morphological change contradicts the conventional concept of growth through the micro-pulling-down method. The distance from seed crystals vs. grain density plot also showed that the density did not decrease with a sufficient slope. Consequently, we concluded that the selection of the c-axis as growth faces is not fruitful to fabricate twins, and the selection of the growth condition, under which geometrical selection strongly affects, is the key.

show abstract

Nepheline and sodalite in the matrix of the Ningqiang carbonaceous chondrite: Implications for formation through parent-body processes

Cited by 13 publications

References 40 publications

Fumarolic-like activity on carbonaceous chondrite parent body

Fumarolic-like activity on carbonaceous chondrite parent body

Reduced and unstratified crust in CV chondrite parent body

Growth of SrB4O7 Crystal Fibers along the c-Axis by Micro-Pulling-Down Method

Contact Info

Product

Resources

About