Serpentine nanotubes in the Mighei CM chondrite

Thomas J. Zega; Laurence Garvie; István Dódony; P R Buseck

doi:10.1016/j.epsl.2004.04.005

Serpentine nanotubes in the Mighei CM chondrite

Thomas J. Zega, Laurence Garvie, István Dódony, P R Buseck

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

We report the discovery of serpentine nanotubes in the Mighei CM chondrite. High-resolution transmission electron microscope (HRTEM) images show that the nanotubes are multiwalled, containing from 3 to 11 layers with periodicities of 0.68±0.08 nm. Some nanotubes appear capped. Their lengths and inner diameters range from 20 to 230 nm and 2 to 9 nm, respectively, with internal volumes of 200-11,300 nm³. Chemical analyses made using electron energy-loss spectroscopy (EELS) give Mg_1.7Fe _0.5²⁺Fe_0.7³⁺[Si_1.5 Fe_0.5³⁺O₅]H_1.8([ ]_1.0O_2.4S_0.6)_∑=4, with H determined by difference. The S-bearing and Fe-rich composition of these nanotubes is distinct from previously reported meteoritic and terrestrial materials, and we believe them to be a new variety of serpentine. These intriguing structures likely formed during aqueous-alteration events early in the history of the solar system and potentially served as containers of primordial fluids.

Original language	English (US)
Pages (from-to)	141-146
Number of pages	6
Journal	Earth and Planetary Science Letters
Volume	223
Issue number	1-2
DOIs	https://doi.org/10.1016/j.epsl.2004.04.005
State	Published - Jun 30 2004

Keywords

Aqueous alteration
CM chondrites
EELS
Fine-grained rims
Matrix
Nanotubes
Serpentine
TEM

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science

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10.1016/j.epsl.2004.04.005

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title = "Serpentine nanotubes in the Mighei CM chondrite",

abstract = "We report the discovery of serpentine nanotubes in the Mighei CM chondrite. High-resolution transmission electron microscope (HRTEM) images show that the nanotubes are multiwalled, containing from 3 to 11 layers with periodicities of 0.68±0.08 nm. Some nanotubes appear capped. Their lengths and inner diameters range from 20 to 230 nm and 2 to 9 nm, respectively, with internal volumes of 200-11,300 nm3. Chemical analyses made using electron energy-loss spectroscopy (EELS) give Mg1.7Fe 0.52+Fe0.73+[Si1.5 Fe0.53+O5]H1.8([ ]1.0O2.4S0.6)∑=4, with H determined by difference. The S-bearing and Fe-rich composition of these nanotubes is distinct from previously reported meteoritic and terrestrial materials, and we believe them to be a new variety of serpentine. These intriguing structures likely formed during aqueous-alteration events early in the history of the solar system and potentially served as containers of primordial fluids.",

keywords = "Aqueous alteration, CM chondrites, EELS, Fine-grained rims, Matrix, Nanotubes, Serpentine, TEM",

author = "Zega, {Thomas J.} and Laurence Garvie and Istv{\'a}n D{\'o}dony and Buseck, {P R}",

note = "Funding Information: We thank Timothy McCoy (Smithsonian Institution) for the Mighei sample (USNM #1081) and John Bradley and an anonymous reviewer for helpful suggestions. This research was funded in part by NASA grant NAG5-9352 and NSF grant EAR 01-13345. [KF]",

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AU - Zega, Thomas J.

AU - Garvie, Laurence

AU - Dódony, István

AU - Buseck, P R

N1 - Funding Information: We thank Timothy McCoy (Smithsonian Institution) for the Mighei sample (USNM #1081) and John Bradley and an anonymous reviewer for helpful suggestions. This research was funded in part by NASA grant NAG5-9352 and NSF grant EAR 01-13345. [KF]

PY - 2004/6/30

Y1 - 2004/6/30

N2 - We report the discovery of serpentine nanotubes in the Mighei CM chondrite. High-resolution transmission electron microscope (HRTEM) images show that the nanotubes are multiwalled, containing from 3 to 11 layers with periodicities of 0.68±0.08 nm. Some nanotubes appear capped. Their lengths and inner diameters range from 20 to 230 nm and 2 to 9 nm, respectively, with internal volumes of 200-11,300 nm3. Chemical analyses made using electron energy-loss spectroscopy (EELS) give Mg1.7Fe 0.52+Fe0.73+[Si1.5 Fe0.53+O5]H1.8([ ]1.0O2.4S0.6)∑=4, with H determined by difference. The S-bearing and Fe-rich composition of these nanotubes is distinct from previously reported meteoritic and terrestrial materials, and we believe them to be a new variety of serpentine. These intriguing structures likely formed during aqueous-alteration events early in the history of the solar system and potentially served as containers of primordial fluids.

AB - We report the discovery of serpentine nanotubes in the Mighei CM chondrite. High-resolution transmission electron microscope (HRTEM) images show that the nanotubes are multiwalled, containing from 3 to 11 layers with periodicities of 0.68±0.08 nm. Some nanotubes appear capped. Their lengths and inner diameters range from 20 to 230 nm and 2 to 9 nm, respectively, with internal volumes of 200-11,300 nm3. Chemical analyses made using electron energy-loss spectroscopy (EELS) give Mg1.7Fe 0.52+Fe0.73+[Si1.5 Fe0.53+O5]H1.8([ ]1.0O2.4S0.6)∑=4, with H determined by difference. The S-bearing and Fe-rich composition of these nanotubes is distinct from previously reported meteoritic and terrestrial materials, and we believe them to be a new variety of serpentine. These intriguing structures likely formed during aqueous-alteration events early in the history of the solar system and potentially served as containers of primordial fluids.

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KW - Serpentine

KW - TEM

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Serpentine nanotubes in the Mighei CM chondrite

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