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A 65 k.y. time series from sediment-hosted glasses reveals rapid transitions in ocean ridge magmas

2017; Geological Society of America; Volume: 45; Issue: 6 Linguagem: Inglês

10.1130/g38752.1

1943-2682

David Ferguson, Yinqi Li, C. H. Langmuir, Kassandra M Costa, Jerry F McManus, Peter Huybers, S. M. Carbotte,

Geological and Geochemical Analysis

Research Article| June 01, 2017 A 65 k.y. time series from sediment-hosted glasses reveals rapid transitions in ocean ridge magmas David J. Ferguson; David J. Ferguson * 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA2School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK *E-mail: d.j.ferguson@leeds.ac.uk Search for other works by this author on: GSW Google Scholar Yinqi Li; Yinqi Li 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA3School of Earth Sciences, Zhejiang University, Hangzhou 310027, China Search for other works by this author on: GSW Google Scholar Charles H. Langmuir; Charles H. Langmuir 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA Search for other works by this author on: GSW Google Scholar Kassandra M. Costa; Kassandra M. Costa 4Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, New York 10964, USA5Department of Earth and Environmental Sciences, Columbia University, New York, New York 10027, USA Search for other works by this author on: GSW Google Scholar Jerry F. McManus; Jerry F. McManus 4Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, New York 10964, USA5Department of Earth and Environmental Sciences, Columbia University, New York, New York 10027, USA Search for other works by this author on: GSW Google Scholar Peter Huybers; Peter Huybers 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA Search for other works by this author on: GSW Google Scholar Suzanne M. Carbotte Suzanne M. Carbotte 4Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Author and Article Information David J. Ferguson * 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA2School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK Yinqi Li 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA3School of Earth Sciences, Zhejiang University, Hangzhou 310027, China Charles H. Langmuir 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA Kassandra M. Costa 4Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, New York 10964, USA5Department of Earth and Environmental Sciences, Columbia University, New York, New York 10027, USA Jerry F. McManus 4Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, New York 10964, USA5Department of Earth and Environmental Sciences, Columbia University, New York, New York 10027, USA Peter Huybers 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA Suzanne M. Carbotte 4Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, New York 10964, USA *E-mail: d.j.ferguson@leeds.ac.uk Publisher: Geological Society of America Received: 01 Nov 2016 Revision Received: 24 Jan 2017 Accepted: 28 Jan 2017 First Online: 28 Jun 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2017) 45 (6): 491–494. https://doi.org/10.1130/G38752.1 Article history Received: 01 Nov 2016 Revision Received: 24 Jan 2017 Accepted: 28 Jan 2017 First Online: 28 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation David J. Ferguson, Yinqi Li, Charles H. Langmuir, Kassandra M. Costa, Jerry F. McManus, Peter Huybers, Suzanne M. Carbotte; A 65 k.y. time series from sediment-hosted glasses reveals rapid transitions in ocean ridge magmas. Geology 2017;; 45 (6): 491–494. doi: https://doi.org/10.1130/G38752.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Studies of ocean ridge magmatism have been hampered by the difficulty in constructing time-series data over more than a few thousand years. Sediment rapidly covers newly formed ocean crust, and older rocks, even when recovered from fault scarps, cannot be dated accurately. Ridge eruptions, however, disperse pyroclastic glass over distances as far as 5 km, and these glasses have been shown to persist for thousands of years in on-ridge sediment push cores. Here we present data on such glasses from a piston core that impacted basement in much older (600 ka) sediment. The age of deposition was determined using established stratigraphic methods to date the host sediment, yielding an average sample resolution of a few thousand years and a continuous 65 k.y. time series. The new time-series data show systematic temporal variations in magma compositions related to a change to the dynamics of crustal storage, which led to greater extents of pre-eruptive differentiation. Shortly thereafter was a small but discernable shift toward more enriched primary melt compositions. These events coincide with the onset of enhanced crustal production, previously identified using seismic data and interpreted to reflect the capture of a hotspot by the ridge. These results show the long-term preservation of pyroclastic glasses and suggest that the construction of high-resolution volcanic stratigraphy over a million years or more may be possible at ocean ridges, using multiple piston cores that impact basement. Sediment-hosted glasses have the potential to transform ocean ridges from the volcanic setting with the worst time-series data to that with the best. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.