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Oxygen Isotope Compositions Of Mineral Separates From Martian Meteorites: Constraints On SNC Parental Magmas

Channon, Melanie (2010) Oxygen Isotope Compositions Of Mineral Separates From Martian Meteorites: Constraints On SNC Parental Magmas. Keck Institute for Space Studies , Pasadena, CA. (Unpublished)

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Many discoveries have been made suggesting that water once flowed on the  surface of Mars.  Igneous rocks from Mars (in the form of meteorites) can be studied  to determine whether or not their magma sources have assimilated crust that has  been altered by water such as an ocean or river.  On Earth, unaltered igneous rocks  that come from the mantle have a uniform oxygen isotopic composition.  Igneous  rocks coming from magma that intruded and assimilated aqueously altered crust  have a different composition.  In this study, oxygen isotopes were measured in  mineral separates from 15 different martian meteorites by laser fluorination.   Olivine from meteorites classified as shergottites and chassignites measured in this  study were found to have the same isotopic composition, whereas olivine from  nakhlites have a different composition.  Shergottites and chassignites may have  never been in contact with water and therefore reflect the oxygen isotopic  composition of igneous minerals from the mantle.  Nakhlites, on the other hand, may  come from a region of Mars that was affected by water. 

Item Type:Report or Paper (Technical Report)
Group:Keck Institute for Space Studies
Funding AgencyGrant Number
Keck Institute for Space Studies (KISS)UNSPECIFIED
Subject Keywords:Keck Institute for Space Studies
Record Number:CaltechAUTHORS:20151013-111913279
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61052
Deposited By: Iryna Chatila
Deposited On:13 Oct 2015 20:42
Last Modified:03 Oct 2019 09:03

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