Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352
Abstract International Ocean Discovery Program Expedition 352 to the Izu‐Bonin forearc cored over 800 m of basement comprising boninite and boninite‐series lavas. This is the most extensive, well‐constrained suite of boninite series lavas ever obtained from in situ oceanic crust. The boninites are c...
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
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| Series: | Geochemistry, Geophysics, Geosystems |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2020GC009093 |
| _version_ | 1827771685534695424 |
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| author | John W. Shervais Mark K. Reagan Marguerite Godard Julie Prytulak Jeffrey G. Ryan Julian A. Pearce Renat R. Almeev Hongyan Li Emily Haugen Timothy Chapman Walter Kurz Wendy R. Nelson Daniel E. Heaton Maria Kirchenbaur Kenji Shimizu Tetsuya Sakuyama Scott K. Vetter Yibing Li Scott Whattam |
| author_facet | John W. Shervais Mark K. Reagan Marguerite Godard Julie Prytulak Jeffrey G. Ryan Julian A. Pearce Renat R. Almeev Hongyan Li Emily Haugen Timothy Chapman Walter Kurz Wendy R. Nelson Daniel E. Heaton Maria Kirchenbaur Kenji Shimizu Tetsuya Sakuyama Scott K. Vetter Yibing Li Scott Whattam |
| author_sort | John W. Shervais |
| collection | DOAJ |
| description | Abstract International Ocean Discovery Program Expedition 352 to the Izu‐Bonin forearc cored over 800 m of basement comprising boninite and boninite‐series lavas. This is the most extensive, well‐constrained suite of boninite series lavas ever obtained from in situ oceanic crust. The boninites are characterized as high‐silica boninite (HSB), low‐silica boninite (LSB), or basaltic boninite based on their SiO2‐MgO‐TiO2 relations. The principal fractionation products of all three series are high‐Mg andesites (HMA). Lavas recovered >250 meters below seafloor (mbsf) erupted at a forearc spreading axis and are dominated by LSB and HMA. Lavas recovered from <250 mbsf erupted off‐axis and are dominated by HSB. The axial and off‐axis lavas are characterized by distinct chemostratigraphic trends in their major, trace, and isotopic compositions. The off‐axis lavas are chemically similar to boninite from the type locality at Chichijima, with concave‐upward rare earth elements patterns. In contrast, the more abundant axial lavas have distinctly light rare earth element‐depleted patterns and represent a new, previously unsampled precursor to the Chichijima‐type boninite lavas. Petrogenetic modeling suggests that the axial lavas formed by fluxing of refractory mantle (likely the residue from forearc basalt extraction), with amphibolite‐facies melt derived from subducting altered oceanic crust. The upper, off‐axis lavas require an additional component of sediment‐derived melt in addition. Both models are consistent with previously published isotopic data. |
| first_indexed | 2024-03-11T12:58:44Z |
| format | Article |
| id | doaj.art-9969b2a00ce74b83a87ed942a0695618 |
| institution | Directory Open Access Journal |
| issn | 1525-2027 |
| language | English |
| last_indexed | 2024-03-11T12:58:44Z |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj.art-9969b2a00ce74b83a87ed942a06956182023-11-03T16:55:56ZengWileyGeochemistry, Geophysics, Geosystems1525-20272021-01-01221n/an/a10.1029/2020GC009093Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352John W. Shervais0Mark K. Reagan1Marguerite Godard2Julie Prytulak3Jeffrey G. Ryan4Julian A. Pearce5Renat R. Almeev6Hongyan Li7Emily Haugen8Timothy Chapman9Walter Kurz10Wendy R. Nelson11Daniel E. Heaton12Maria Kirchenbaur13Kenji Shimizu14Tetsuya Sakuyama15Scott K. Vetter16Yibing Li17Scott Whattam18Department of Geology Utah State University Logan UT USADepartment of Earth and Environmental Science University of Iowa Iowa City IA USAGéosciences Montpellier CNRS Université de Montpellier Montpellier FranceDepartment of Earth Sciences University of Durham Durham UKSchool of Geosciences University of South Florida Tampa FL USASchool of Earth & Ocean Sciences Cardiff University Cardiff UKLeibniz Universität Hannover Institut für Mineralogie Hannover GermanyState Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou P.R. ChinaDepartment of Geology Utah State University Logan UT USASchool of Geosciences University of Sydney Sydney NSW AustraliaInstitute of Earth Sciences NAWI Graz Geocenter University of Graz AustriaDepartment of Physics, Astronomy, and Geosciences Towson University Towson MD USACEOAS Oregon State University Corvallis OR USALeibniz Universität Hannover Institut für Mineralogie Hannover GermanyKochi Institute for Core Sample Research Japan Agency for Marine‐Earth Science and Technology Kochi JapanDepartment of Science Osaka University Osaka JapanDepartment of Geology Centenary College Shreveport LA USAInstitute of Geology Chinese Academy of Geological Science Beijing P.R. ChinaDepartment of Geosciences King Fahd University of Petroleum and Minerals Dhahran Saudi ArabiaAbstract International Ocean Discovery Program Expedition 352 to the Izu‐Bonin forearc cored over 800 m of basement comprising boninite and boninite‐series lavas. This is the most extensive, well‐constrained suite of boninite series lavas ever obtained from in situ oceanic crust. The boninites are characterized as high‐silica boninite (HSB), low‐silica boninite (LSB), or basaltic boninite based on their SiO2‐MgO‐TiO2 relations. The principal fractionation products of all three series are high‐Mg andesites (HMA). Lavas recovered >250 meters below seafloor (mbsf) erupted at a forearc spreading axis and are dominated by LSB and HMA. Lavas recovered from <250 mbsf erupted off‐axis and are dominated by HSB. The axial and off‐axis lavas are characterized by distinct chemostratigraphic trends in their major, trace, and isotopic compositions. The off‐axis lavas are chemically similar to boninite from the type locality at Chichijima, with concave‐upward rare earth elements patterns. In contrast, the more abundant axial lavas have distinctly light rare earth element‐depleted patterns and represent a new, previously unsampled precursor to the Chichijima‐type boninite lavas. Petrogenetic modeling suggests that the axial lavas formed by fluxing of refractory mantle (likely the residue from forearc basalt extraction), with amphibolite‐facies melt derived from subducting altered oceanic crust. The upper, off‐axis lavas require an additional component of sediment‐derived melt in addition. Both models are consistent with previously published isotopic data.https://doi.org/10.1029/2020GC009093boniniteIODP Expedition 352Izu‐Bonin‐Mariana forearcJOIDES ResolutionophiolitesSites U1439, U1442 |
| spellingShingle | John W. Shervais Mark K. Reagan Marguerite Godard Julie Prytulak Jeffrey G. Ryan Julian A. Pearce Renat R. Almeev Hongyan Li Emily Haugen Timothy Chapman Walter Kurz Wendy R. Nelson Daniel E. Heaton Maria Kirchenbaur Kenji Shimizu Tetsuya Sakuyama Scott K. Vetter Yibing Li Scott Whattam Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352 Geochemistry, Geophysics, Geosystems boninite IODP Expedition 352 Izu‐Bonin‐Mariana forearc JOIDES Resolution ophiolites Sites U1439, U1442 |
| title | Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352 |
| title_full | Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352 |
| title_fullStr | Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352 |
| title_full_unstemmed | Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352 |
| title_short | Magmatic Response to Subduction Initiation, Part II: Boninites and Related Rocks of the Izu‐Bonin Arc From IODP Expedition 352 |
| title_sort | magmatic response to subduction initiation part ii boninites and related rocks of the izu bonin arc from iodp expedition 352 |
| topic | boninite IODP Expedition 352 Izu‐Bonin‐Mariana forearc JOIDES Resolution ophiolites Sites U1439, U1442 |
| url | https://doi.org/10.1029/2020GC009093 |
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