| 51394 |
Creator |
1c5c32b11b5ad1bd9c846a77784abc38 |
| 51394 |
Creator |
96fdb8f74aad60e762b1aef18d80ab45 |
| 51394 |
Creator |
b75227dc49245aab76a534b836099ab7 |
| 51394 |
Creator |
df3dbfda1cf5802e59649f5b505eaec5 |
| 51394 |
Creator |
f959096fc292f5182e8b214c797d2544 |
| 51394 |
Creator |
fcdb1adbeb7a0307cef3a0b73443e301 |
| 51394 |
Creator |
72eb7170d8a19be385f16460fd117c8e |
| 51394 |
Creator |
84764f824834b90b789fef94138093b1 |
| 51394 |
Creator |
ext-90060a5811cec207e4e5b5ac2066fe8f |
| 51394 |
Creator |
ext-ca4be981b663b75d8b341ed478ad81b7 |
| 51394 |
Date |
2017 |
| 51394 |
Date |
2017-04 |
| 51394 |
Is Part Of |
p10869379 |
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Is Part Of |
repository |
| 51394 |
abstract |
The Emmaville eucrite is a relatively poorly studied basaltic achondrite with an anomalous
oxygen isotope signature. In this study, we report comprehensive mineralogical, petrographic,
and geochemical data from Emmaville in order to understand its petrogenesis and relationship
with the basaltic eucrites. Emmaville is an unusually fine-grained, hornfelsic-textured
metabasalt with pervasive impact melt veins and mineral compositions similar to those
of typical basaltic eucrites. The major and trace element bulk composition of Emmaville
is also typical of a basaltic eucrite. Three separated individual lithologies were
also analyzed for O isotopes; a dark gray fraction (E1), a shocked lithology (E2),
and a lighter gray portion (E3). Fractions E1 and E2 shared similar O isotope compositions
to the bulk sample (E-B), whereas the lighter gray portion (E3) is slightly elevated
in Δ<sup>17</sup>O and significantly elevated in δ<sup>18</sup>O compared to bulk.
No evidence for any exogenous material is observed in the thin sections, coupled with
the striking compositional similarity to typical basaltic eucrites, appears to preclude
a simple impact-mixing hypothesis. The O-isotopes of Emmaville are similar to those
of Bunburra Rockhole, A-881394, and EET 92023, and thus distinct from the majority
of the HEDs, despite having similarities in petrology, mineral, and bulk compositions.
It would, therefore, seem plausible that all four of these samples are derived from
a single HED-like parent body that is isotopically distinct from that of the HEDs
(Vesta) but similar in composition. |
| 51394 |
authorList |
authors |
| 51394 |
issue |
4 |
| 51394 |
status |
peerReviewed |
| 51394 |
uri |
http://data.open.ac.uk/oro/document/634891 |
| 51394 |
uri |
http://data.open.ac.uk/oro/document/634892 |
| 51394 |
uri |
http://data.open.ac.uk/oro/document/634893 |
| 51394 |
uri |
http://data.open.ac.uk/oro/document/634894 |
| 51394 |
uri |
http://data.open.ac.uk/oro/document/634895 |
| 51394 |
uri |
http://data.open.ac.uk/oro/document/634896 |
| 51394 |
uri |
http://data.open.ac.uk/oro/document/662708 |
| 51394 |
volume |
52 |
| 51394 |
type |
AcademicArticle |
| 51394 |
type |
Article |
| 51394 |
label |
Barrett, T. J. ; Mittlefehldt, D. W.; Greenwood, R. C. ; Charlier, B. L. A. ; Hammond,
S. ; Ross, D. K.; Anand, M. ; Franchi, I. A. ; Abernethy, F. A. J. and Grady, M.
M. (2017). The mineralogy, petrology, and composition of anomalous eucrite Emmavill.
Meteoritics & Planetary Science, 52(4) pp. 656–668. |
| 51394 |
label |
Barrett, T. J. ; Mittlefehldt, D. W.; Greenwood, R. C. ; Charlier, B. L. A. ; Hammond,
S. ; Ross, D. K.; Anand, M. ; Franchi, I. A. ; Abernethy, F. A. J. and Grady, M.
M. (2017). The mineralogy, petrology, and composition of anomalous eucrite Emmaville.
Meteoritics & Planetary Science, 52(4) pp. 656–668. |
| 51394 |
label |
Barrett, T. J. ; Mittlefehldt, D. W.; Greenwood, R. C. ; Charlier, B. L. A. ; Hammond,
S. ; Ross, D. K.; Anand, M. ; Franchi, I. A. ; Abernethy, F. A. J. and Grady, M.
M. (2017). The mineralogy, petrology, and composition of anomalous eucrite Emmaville.
Meteoritics & Planetary Science, 52(4) pp. 656–668. |
| 51394 |
sameAs |
maps.12818 |
| 51394 |
Title |
The mineralogy, petrology, and composition of anomalous eucrite Emmavill |
| 51394 |
Title |
The mineralogy, petrology, and composition of anomalous eucrite Emmaville |
| 51394 |
in dataset |
oro |