| 39391 |
Creator |
96fdb8f74aad60e762b1aef18d80ab45 |
| 39391 |
Creator |
bd12e480200a0e58504d6106bfed3c8a |
| 39391 |
Creator |
1b35f2160114480bb2a439ff7d486ae0 |
| 39391 |
Date |
2014 |
| 39391 |
Is Part Of |
repository |
| 39391 |
abstract |
The martian meteorite NWA 7034 (and its paired siblings NWA 7475, 7533, 7906, 7907
and 8114) is classified as a basaltic breccia. More
detailed studies describe the sample as either a monomict or polymict breccia consisting
of multiple igneous-textured clasts, including impact melt rocks and phenocrysts set
in a fine-grained clastic matrix. The breccia may be the product of its volcanic history
or regolith processes. The first report of noble gases in NWA 7034 deduced a CRE age
of between 5 and 11 Ma, depending on the assumed chemistry of the meteorite. NWA 7034
differs from other martian meteorites not just in its petrology, but also in its chronological
evolution: it contains ancient zircons (~ 4.4 Ga; ref. 3), but has a Rb-Sr crystallization
age of ~ 2.1 Ga, implying a later disturbance. A difference in the volatile inventory
might help to distinguish between the former and the latter origins, since one might
hope to detect a component related to the surface exposure history of the meteorite
in regolith material, which might be otherwise absent in a volcanic breccia. Determination
of the light element (C, N, noble gases) chemistry of brecciated meteorites (asteroidal
and lunar) has enabled inferences to be drawn concerning the history of material at
a parent body surface, as well as the evolutionary history of the parent prior to
exposure. NWA 7034 offers the first opportunity to apply the lessons learnt from asteroid
and lunar breccias to be applied to Mars. |
| 39391 |
authorList |
authors |
| 39391 |
presentedAt |
ext-87f4a3555523534097784a207c870930 |
| 39391 |
status |
nonPeerReviewed |
| 39391 |
type |
AcademicArticle |
| 39391 |
type |
Article |
| 39391 |
label |
Grady, M. M. ; Schwenzer, S. P. and Verchovsky, A. B. (2014). The mantle, crust
and atmosphere of Mars as illuminated by the light element geochemistry of NWA 7034.
In: 45th Lunar and Planetary Science Conference, 17-21 Mar 2014, The Woodlands, TX,
USA. |
| 39391 |
label |
Grady, M. M. ; Schwenzer, S. P. and Verchovsky, A. B. (2014). The mantle, crust
and atmosphere of Mars as illuminated by the light element geochemistry of NWA 7034.
In: 45th Lunar and Planetary Science Conference, 17-21 Mar 2014, The Woodlands, TX,
USA. |
| 39391 |
Title |
The mantle, crust and atmosphere of Mars as illuminated by the light element geochemistry
of NWA 7034 |
| 39391 |
in dataset |
oro |