New triple oxygen isotope data of bulk and separated fractions from SNC meteorites: Evidence for mantle homogeneity of Mars
We report precise triple oxygen isotope data of bulk materials and separated fractions of several Shergotty–Nakhla–Chassigny (SNC) meteorites using enhanced laser‐assisted fluorination technique. This study shows that SNCs have remarkably identical Δ17O and a narrow range in δ18O values suggesting t...
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| Veröffentlicht in: | Meteoritics & planetary science 2016-05, Vol.51 (5), p.981-995 |
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| container_title | Meteoritics & planetary science |
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| creator | Ali, Arshad Jabeen, Iffat Gregory, David Verish, Robert Banerjee, Neil R. |
| description | We report precise triple oxygen isotope data of bulk materials and separated fractions of several Shergotty–Nakhla–Chassigny (SNC) meteorites using enhanced laser‐assisted fluorination technique. This study shows that SNCs have remarkably identical Δ17O and a narrow range in δ18O values suggesting that these meteorites have assimilated negligibly small surface materials ( |
| doi_str_mv | 10.1111/maps.12640 |
| format | Article |
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This study shows that SNCs have remarkably identical Δ17O and a narrow range in δ18O values suggesting that these meteorites have assimilated negligibly small surface materials (<5%), which is undetectable in the oxygen isotope compositions reported here. Also, fractionation factors in coexisting silicate mineral pairs (px‐ol and mask‐ol) further demonstrate isotopic equilibrium at magmatic temperatures. We present a mass‐dependent fractionation line for bulk materials with a slope of 0.526 ± 0.016 (1SE) comparable to the slope obtained in an earlier study (0.526 ± 0.013; Franchi et al. 1999). We also present a new Martian fractionation line for SNCs constructed from separated fractions (i.e., pyroxene, olivine, and maskelynite) with a slope of 0.532 ± 0.009 (1SE). The identical fractionation lines run above and parallel to our terrestrial fractionation line with Δ17O = 0.318 ± 0.016‰ (SD) for bulk materials and 0.316 ± 0.009‰ (SD) for separated fractions. The conformity in slopes and Δ17O between bulk materials and separated fractions confirm oxygen isotope homogeneity in the Martian mantle though recent studies suggest that the Martian lithosphere may potentially have multiple oxygen isotope reservoirs.</description><identifier>ISSN: 1086-9379</identifier><identifier>EISSN: 1945-5100</identifier><identifier>DOI: 10.1111/maps.12640</identifier><identifier>CODEN: MPSCFY</identifier><language>eng</language><publisher>Hoboken: Blackwell Publishing Ltd</publisher><subject>Fractionation ; Homogeneity ; Mantle ; Meteorites ; Oxygen isotopes ; Silicates ; Slopes ; SNC meteorites</subject><ispartof>Meteoritics & planetary science, 2016-05, Vol.51 (5), p.981-995</ispartof><rights>The Meteoritical Society, 2016.</rights><rights>Copyright © 2016 The Meteoritical Society</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4970-2433a714e477f517a319035230c4ad21db7dcc60b2e9e9479ba0be46c12b25183</citedby><cites>FETCH-LOGICAL-a4970-2433a714e477f517a319035230c4ad21db7dcc60b2e9e9479ba0be46c12b25183</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fmaps.12640$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fmaps.12640$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,1433,27924,27925,45574,45575,46409,46833</link.rule.ids></links><search><creatorcontrib>Ali, Arshad</creatorcontrib><creatorcontrib>Jabeen, Iffat</creatorcontrib><creatorcontrib>Gregory, David</creatorcontrib><creatorcontrib>Verish, Robert</creatorcontrib><creatorcontrib>Banerjee, Neil R.</creatorcontrib><title>New triple oxygen isotope data of bulk and separated fractions from SNC meteorites: Evidence for mantle homogeneity of Mars</title><title>Meteoritics & planetary science</title><addtitle>Meteorit Planet Sci</addtitle><description>We report precise triple oxygen isotope data of bulk materials and separated fractions of several Shergotty–Nakhla–Chassigny (SNC) meteorites using enhanced laser‐assisted fluorination technique. This study shows that SNCs have remarkably identical Δ17O and a narrow range in δ18O values suggesting that these meteorites have assimilated negligibly small surface materials (<5%), which is undetectable in the oxygen isotope compositions reported here. Also, fractionation factors in coexisting silicate mineral pairs (px‐ol and mask‐ol) further demonstrate isotopic equilibrium at magmatic temperatures. We present a mass‐dependent fractionation line for bulk materials with a slope of 0.526 ± 0.016 (1SE) comparable to the slope obtained in an earlier study (0.526 ± 0.013; Franchi et al. 1999). We also present a new Martian fractionation line for SNCs constructed from separated fractions (i.e., pyroxene, olivine, and maskelynite) with a slope of 0.532 ± 0.009 (1SE). The identical fractionation lines run above and parallel to our terrestrial fractionation line with Δ17O = 0.318 ± 0.016‰ (SD) for bulk materials and 0.316 ± 0.009‰ (SD) for separated fractions. The conformity in slopes and Δ17O between bulk materials and separated fractions confirm oxygen isotope homogeneity in the Martian mantle though recent studies suggest that the Martian lithosphere may potentially have multiple oxygen isotope reservoirs.</description><subject>Fractionation</subject><subject>Homogeneity</subject><subject>Mantle</subject><subject>Meteorites</subject><subject>Oxygen isotopes</subject><subject>Silicates</subject><subject>Slopes</subject><subject>SNC meteorites</subject><issn>1086-9379</issn><issn>1945-5100</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNp9kUtP3DAUhSNEJV7d9BdY6qaqFPArccwOjYBWMFMEVF1aN8lNa0ji1PYURvz5epiWBQvu5p7Fd46OdLLsA6OHLN3RAFM4ZLyUdCvbZVoWecEo3U6aVmWuhdI72V4Id5SKggm5mz0t8IFEb6ceiXtc_cSR2OCim5C0EIG4jtTL_p7A2JKAE3iI2JLOQxOtG0NSbiA3ixkZMKLzNmI4Jqd_bItjg6RzngwwxhT-yw0upaONq3XoHHw4yN510Ad8_-_vZ9_PTm9nX_LLb-dfZyeXOUitaM6lEKCYRKlUVzAFgulUnwvaSGg5a2vVNk1Ja44atVS6BlqjLBvGa16wSuxnnza5k3e_lxiiGWxosO9hRLcMhlWspJpXhUjox1fonVv6MbUzTFWl4pJKmajPG6rxLgSPnZm8HcCvDKNmvYNZ72Ced0gw28APtsfVG6SZn1zd_PfkG48NER9fPODvTamEKsyPxbm5vp2p-fXZhZHiL4skmcg</recordid><startdate>201605</startdate><enddate>201605</enddate><creator>Ali, Arshad</creator><creator>Jabeen, Iffat</creator><creator>Gregory, David</creator><creator>Verish, Robert</creator><creator>Banerjee, Neil R.</creator><general>Blackwell Publishing Ltd</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope></search><sort><creationdate>201605</creationdate><title>New triple oxygen isotope data of bulk and separated fractions from SNC meteorites: Evidence for mantle homogeneity of Mars</title><author>Ali, Arshad ; Jabeen, Iffat ; Gregory, David ; Verish, Robert ; Banerjee, Neil R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4970-2433a714e477f517a319035230c4ad21db7dcc60b2e9e9479ba0be46c12b25183</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Fractionation</topic><topic>Homogeneity</topic><topic>Mantle</topic><topic>Meteorites</topic><topic>Oxygen isotopes</topic><topic>Silicates</topic><topic>Slopes</topic><topic>SNC meteorites</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ali, Arshad</creatorcontrib><creatorcontrib>Jabeen, Iffat</creatorcontrib><creatorcontrib>Gregory, David</creatorcontrib><creatorcontrib>Verish, Robert</creatorcontrib><creatorcontrib>Banerjee, Neil R.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Meteoritics & planetary science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ali, Arshad</au><au>Jabeen, Iffat</au><au>Gregory, David</au><au>Verish, Robert</au><au>Banerjee, Neil R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>New triple oxygen isotope data of bulk and separated fractions from SNC meteorites: Evidence for mantle homogeneity of Mars</atitle><jtitle>Meteoritics & planetary science</jtitle><addtitle>Meteorit Planet Sci</addtitle><date>2016-05</date><risdate>2016</risdate><volume>51</volume><issue>5</issue><spage>981</spage><epage>995</epage><pages>981-995</pages><issn>1086-9379</issn><eissn>1945-5100</eissn><coden>MPSCFY</coden><abstract>We report precise triple oxygen isotope data of bulk materials and separated fractions of several Shergotty–Nakhla–Chassigny (SNC) meteorites using enhanced laser‐assisted fluorination technique. This study shows that SNCs have remarkably identical Δ17O and a narrow range in δ18O values suggesting that these meteorites have assimilated negligibly small surface materials (<5%), which is undetectable in the oxygen isotope compositions reported here. Also, fractionation factors in coexisting silicate mineral pairs (px‐ol and mask‐ol) further demonstrate isotopic equilibrium at magmatic temperatures. We present a mass‐dependent fractionation line for bulk materials with a slope of 0.526 ± 0.016 (1SE) comparable to the slope obtained in an earlier study (0.526 ± 0.013; Franchi et al. 1999). We also present a new Martian fractionation line for SNCs constructed from separated fractions (i.e., pyroxene, olivine, and maskelynite) with a slope of 0.532 ± 0.009 (1SE). The identical fractionation lines run above and parallel to our terrestrial fractionation line with Δ17O = 0.318 ± 0.016‰ (SD) for bulk materials and 0.316 ± 0.009‰ (SD) for separated fractions. The conformity in slopes and Δ17O between bulk materials and separated fractions confirm oxygen isotope homogeneity in the Martian mantle though recent studies suggest that the Martian lithosphere may potentially have multiple oxygen isotope reservoirs.</abstract><cop>Hoboken</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/maps.12640</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Fractionation Homogeneity Mantle Meteorites Oxygen isotopes Silicates Slopes SNC meteorites |
| title | New triple oxygen isotope data of bulk and separated fractions from SNC meteorites: Evidence for mantle homogeneity of Mars |
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