Stability of Magnesiowüstite in Earth's Lower Mantle
Magnesiowüstite [(Mg,Fe)O] is the second most abundant mineral of Earth's lower mantle. Understanding its stability under lower mantle conditions is crucial for interpreting the physical and chemical properties of the whole Earth. Previous studies in an externally heated diamond anvil cell sug...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2003-04, Vol.100 (8), p.4405-4408 |
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| creator | Lin, Jung-Fu Heinz, Dion L. Mao, Ho-kwang Hemley, Russell J. Devine, James M. Li, Jie Shen, Guoyin |
| description | Magnesiowüstite [(Mg,Fe)O] is the second most abundant mineral of Earth's lower mantle. Understanding its stability under lower mantle conditions is crucial for interpreting the physical and chemical properties of the whole Earth. Previous studies in an externally heated diamond anvil cell suggested that magnesiowüstites decompose into two components, Fe-rich and Mg-rich magnesiowüstites at 86 GPa and 1,000 K. Here we report an in situ study of two magnesiowüstites [(Mg-0.39,Fe0.61)O and (Mg0.25, Fe0.75)O] at pressures and temperatures that overlap with mantle conditions, using a laser-heated diamond anvil cell combined with synchrotron x-ray diffraction. Our results show that addition of Mg in wüstite (FeO) can stabilize the rock-salt structure to much higher pressures and temperatures. In contrast to the previous studies, our results indicate that Mg-rich magnesiowüstite is stable in the rock-salt structure in the lower mantle. The physical and chemical properties of magnesiowüstite should change gradually and continuously in the lower mantle, suggesting that it does not make a significant contribution to seismic-wave heterogeneity of the lower mantle. Stable Mg-rich magnesiowüstite in lowermost mantle can destabilize FeO in the core-mantle boundary region and remove FeO from the outer core. |
| doi_str_mv | 10.1073/pnas.252782399 |
| format | Article |
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Understanding its stability under lower mantle conditions is crucial for interpreting the physical and chemical properties of the whole Earth. Previous studies in an externally heated diamond anvil cell suggested that magnesiowüstites decompose into two components, Fe-rich and Mg-rich magnesiowüstites at 86 GPa and 1,000 K. Here we report an in situ study of two magnesiowüstites [(Mg-0.39,Fe0.61)O and (Mg0.25, Fe0.75)O] at pressures and temperatures that overlap with mantle conditions, using a laser-heated diamond anvil cell combined with synchrotron x-ray diffraction. Our results show that addition of Mg in wüstite (FeO) can stabilize the rock-salt structure to much higher pressures and temperatures. In contrast to the previous studies, our results indicate that Mg-rich magnesiowüstite is stable in the rock-salt structure in the lower mantle. The physical and chemical properties of magnesiowüstite should change gradually and continuously in the lower mantle, suggesting that it does not make a significant contribution to seismic-wave heterogeneity of the lower mantle. Stable Mg-rich magnesiowüstite in lowermost mantle can destabilize FeO in the core-mantle boundary region and remove FeO from the outer core.</description><identifier>ISSN: 0027-8424</identifier><identifier>EISSN: 1091-6490</identifier><identifier>DOI: 10.1073/pnas.252782399</identifier><identifier>PMID: 12660368</identifier><language>eng</language><publisher>United States: National Academy of Sciences</publisher><subject>Geology ; Laser beams ; Laser heating ; Lower mantle ; Minerals ; Perovskites ; Phase diagrams ; Phase transformations ; Physical Sciences ; Physics ; Rapid quenching ; Silicates ; X ray diffraction</subject><ispartof>Proceedings of the National Academy of Sciences - PNAS, 2003-04, Vol.100 (8), p.4405-4408</ispartof><rights>Copyright 1993-2003 National Academy of Sciences of the United States of America</rights><rights>Copyright National Academy of Sciences Apr 15, 2003</rights><rights>Copyright © 2003, The National Academy of Sciences 2003</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c554t-c065efbef1353c845c96cdea00508a0923bd74c8973efd1fe5ef3364e003be7c3</citedby><cites>FETCH-LOGICAL-c554t-c065efbef1353c845c96cdea00508a0923bd74c8973efd1fe5ef3364e003be7c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://www.pnas.org/content/100/8.cover.gif</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/3143953$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/3143953$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>230,314,723,776,780,799,881,27901,27902,53766,53768,57992,58225</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12660368$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lin, Jung-Fu</creatorcontrib><creatorcontrib>Heinz, Dion L.</creatorcontrib><creatorcontrib>Mao, Ho-kwang</creatorcontrib><creatorcontrib>Hemley, Russell J.</creatorcontrib><creatorcontrib>Devine, James M.</creatorcontrib><creatorcontrib>Li, Jie</creatorcontrib><creatorcontrib>Shen, Guoyin</creatorcontrib><title>Stability of Magnesiowüstite in Earth's Lower Mantle</title><title>Proceedings of the National Academy of Sciences - PNAS</title><addtitle>Proc Natl Acad Sci U S A</addtitle><description>Magnesiowüstite [(Mg,Fe)O] is the second most abundant mineral of Earth's lower mantle. Understanding its stability under lower mantle conditions is crucial for interpreting the physical and chemical properties of the whole Earth. Previous studies in an externally heated diamond anvil cell suggested that magnesiowüstites decompose into two components, Fe-rich and Mg-rich magnesiowüstites at 86 GPa and 1,000 K. Here we report an in situ study of two magnesiowüstites [(Mg-0.39,Fe0.61)O and (Mg0.25, Fe0.75)O] at pressures and temperatures that overlap with mantle conditions, using a laser-heated diamond anvil cell combined with synchrotron x-ray diffraction. Our results show that addition of Mg in wüstite (FeO) can stabilize the rock-salt structure to much higher pressures and temperatures. In contrast to the previous studies, our results indicate that Mg-rich magnesiowüstite is stable in the rock-salt structure in the lower mantle. The physical and chemical properties of magnesiowüstite should change gradually and continuously in the lower mantle, suggesting that it does not make a significant contribution to seismic-wave heterogeneity of the lower mantle. Stable Mg-rich magnesiowüstite in lowermost mantle can destabilize FeO in the core-mantle boundary region and remove FeO from the outer core.</description><subject>Geology</subject><subject>Laser beams</subject><subject>Laser heating</subject><subject>Lower mantle</subject><subject>Minerals</subject><subject>Perovskites</subject><subject>Phase diagrams</subject><subject>Phase transformations</subject><subject>Physical Sciences</subject><subject>Physics</subject><subject>Rapid quenching</subject><subject>Silicates</subject><subject>X ray diffraction</subject><issn>0027-8424</issn><issn>1091-6490</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNp90T9vEzEYBnALgWhoWZkQOjHQ6cLr85-zhw6oKi1SEANltnzOe62jyznYPkq_GxtfDEeJ0sLA5MG_59VrP4S8ojCn0LL3m9GmeSOaVjVM6ydkRkHTWnINT8kMoGlrxRt-RF6ktAIALRQ8J0e0kRKYVDMivmbb-cHn-yr01Wd7M2Ly4e73r5R9xsqP1YWN-fY0VYtwh7GIMQ94Qp71dkj4cn8ek28fL67Pr-rFl8tP5x8WtROC59qBFNh32FMmmFNcOC3dEi2AAGVBN6xbttwp3TLsl7THohmTHAFYh61jx-RsN3czdWtcOhxztIPZRL-28d4E683fN6O_NTfhh6GCCdmW_Lt9PobvE6Zs1j45HAY7YpiSaRlVmmtZ4Nt_4CpMcSxvMw1QxhWXvKD5DrkYUorYHxahYLZtmG0b5tBGCbx5vP4D33__I7ANPkwDowznIAo4_S8w_TQMGX_mIl_v5CrlEA-UUc60YOwPRg-n2g</recordid><startdate>20030415</startdate><enddate>20030415</enddate><creator>Lin, Jung-Fu</creator><creator>Heinz, Dion L.</creator><creator>Mao, Ho-kwang</creator><creator>Hemley, Russell J.</creator><creator>Devine, James M.</creator><creator>Li, Jie</creator><creator>Shen, Guoyin</creator><general>National Academy of Sciences</general><general>National Acad Sciences</general><general>The National Academy of Sciences</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7QL</scope><scope>7QP</scope><scope>7QR</scope><scope>7SN</scope><scope>7SS</scope><scope>7T5</scope><scope>7TK</scope><scope>7TM</scope><scope>7TO</scope><scope>7U9</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H94</scope><scope>M7N</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20030415</creationdate><title>Stability of Magnesiowüstite in Earth's Lower Mantle</title><author>Lin, Jung-Fu ; Heinz, Dion L. ; Mao, Ho-kwang ; Hemley, Russell J. ; Devine, James M. ; Li, Jie ; Shen, Guoyin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c554t-c065efbef1353c845c96cdea00508a0923bd74c8973efd1fe5ef3364e003be7c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Geology</topic><topic>Laser beams</topic><topic>Laser heating</topic><topic>Lower mantle</topic><topic>Minerals</topic><topic>Perovskites</topic><topic>Phase diagrams</topic><topic>Phase transformations</topic><topic>Physical Sciences</topic><topic>Physics</topic><topic>Rapid quenching</topic><topic>Silicates</topic><topic>X ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lin, Jung-Fu</creatorcontrib><creatorcontrib>Heinz, Dion L.</creatorcontrib><creatorcontrib>Mao, Ho-kwang</creatorcontrib><creatorcontrib>Hemley, Russell J.</creatorcontrib><creatorcontrib>Devine, James M.</creatorcontrib><creatorcontrib>Li, Jie</creatorcontrib><creatorcontrib>Shen, Guoyin</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>Chemoreception Abstracts</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Immunology Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Oncogenes and Growth Factors Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Proceedings of the National Academy of Sciences - PNAS</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lin, Jung-Fu</au><au>Heinz, Dion L.</au><au>Mao, Ho-kwang</au><au>Hemley, Russell J.</au><au>Devine, James M.</au><au>Li, Jie</au><au>Shen, Guoyin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Stability of Magnesiowüstite in Earth's Lower Mantle</atitle><jtitle>Proceedings of the National Academy of Sciences - PNAS</jtitle><addtitle>Proc Natl Acad Sci U S A</addtitle><date>2003-04-15</date><risdate>2003</risdate><volume>100</volume><issue>8</issue><spage>4405</spage><epage>4408</epage><pages>4405-4408</pages><issn>0027-8424</issn><eissn>1091-6490</eissn><abstract>Magnesiowüstite [(Mg,Fe)O] is the second most abundant mineral of Earth's lower mantle. Understanding its stability under lower mantle conditions is crucial for interpreting the physical and chemical properties of the whole Earth. Previous studies in an externally heated diamond anvil cell suggested that magnesiowüstites decompose into two components, Fe-rich and Mg-rich magnesiowüstites at 86 GPa and 1,000 K. Here we report an in situ study of two magnesiowüstites [(Mg-0.39,Fe0.61)O and (Mg0.25, Fe0.75)O] at pressures and temperatures that overlap with mantle conditions, using a laser-heated diamond anvil cell combined with synchrotron x-ray diffraction. Our results show that addition of Mg in wüstite (FeO) can stabilize the rock-salt structure to much higher pressures and temperatures. In contrast to the previous studies, our results indicate that Mg-rich magnesiowüstite is stable in the rock-salt structure in the lower mantle. The physical and chemical properties of magnesiowüstite should change gradually and continuously in the lower mantle, suggesting that it does not make a significant contribution to seismic-wave heterogeneity of the lower mantle. Stable Mg-rich magnesiowüstite in lowermost mantle can destabilize FeO in the core-mantle boundary region and remove FeO from the outer core.</abstract><cop>United States</cop><pub>National Academy of Sciences</pub><pmid>12660368</pmid><doi>10.1073/pnas.252782399</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Geology Laser beams Laser heating Lower mantle Minerals Perovskites Phase diagrams Phase transformations Physical Sciences Physics Rapid quenching Silicates X ray diffraction |
| title | Stability of Magnesiowüstite in Earth's Lower Mantle |
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