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Drilling to gabbro in intact ocean crust

Drilling to gabbro in intact ocean crust
Drilling to gabbro in intact ocean crust
Sampling an intact sequence of oceanic crust through lavas, dikes, and gabbros is necessary to advance the understanding of the formation and evolution of crust formed at mid-ocean ridges, but has been an elusive goal of scientific ocean drilling for decades. Recent drilling in the eastern Pacific Ocean in Hole 1256D reached gabbro within seismic layer 2, 1157 meters into crust formed at superfast spreading rate. The gabbros are the crystallized melt lenses that formed beneath a mid-ocean ridge. The depth at which gabbro was reached confirms predictions extrapolated from seismic experiments at modern ridges that melt lenses occur at shallower depths at faster spreading rates. The gabbros intrude metamorphosed sheeted dikes and have compositions similar to the overlying lavas, precluding formation of the cumulate lower oceanic crust from melt lenses so far penetrated by Hole 1256D.
deep drilling, integrated ocean drilling program, ocean crust, gabbro
0036-8075
1016-1020
Wilson, D.S.
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Teagle, D.A.H.
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Alt, J.C.
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Banerjee, N.R.
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Umino, S.
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Miyashita, S.
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Acton, G.D.
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Anma, R.
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Barr, S.R.
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Belghoul, A.
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Carlut, J.
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Christie, D.M.
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Coggon, R.M.
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Cooper, K.M.
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Cordier, C.
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Einaudi, F.
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Galli, L.
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Geldmacher, J.
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Gilbert, L.A.
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Herrero-Bervera, E.
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Kalberkamp, U.
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Koepke, J.
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Laverne, C.
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Lledo Vasquez, H.L.
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Maclennan, J.
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Nichols, H.J.
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Reichow, M.K.
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Sakuyama, T.
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Sano, T.
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Sandwell, R.
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Scheibner, B.
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Smith-Duque, C.E.
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Swift, S.A.
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Tartarotti, P.
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Tikku, A.A.
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Tominaga, M.
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Veloso, E.A.
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Yamasaki, T.
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Yamazaki, S.
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Ziegler, C.
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Wilson, D.S.
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Teagle, D.A.H.
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Alt, J.C.
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Banerjee, N.R.
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Umino, S.
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Miyashita, S.
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Acton, G.D.
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Anma, R.
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Barr, S.R.
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Belghoul, A.
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Carlut, J.
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Christie, D.M.
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Coggon, R.M.
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Cooper, K.M.
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Cordier, C.
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Crispini, L.
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Durand, S.R.
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Einaudi, F.
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Galli, L.
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Gao, Y.
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Geldmacher, J.
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Gilbert, L.A.
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Hayman, N.W.
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Herrero-Bervera, E.
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Hirano, N.
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Holter, S.
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Ingle, S.
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Jiang, S.
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Kalberkamp, U.
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Kerneklian, M.
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Koepke, J.
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Laverne, C.
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Lledo Vasquez, H.L.
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Maclennan, J.
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Morgan, S.
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Neo, N.
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Nichols, H.J.
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Park, H-S.
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Reichow, M.K.
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Sakuyama, T.
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Sano, T.
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Sandwell, R.
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Scheibner, B.
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Smith-Duque, C.E.
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Swift, S.A.
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Tartarotti, P.
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Tikku, A.A.
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Tominaga, M.
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Veloso, E.A.
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Yamasaki, T.
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Yamazaki, S.
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Ziegler, C.
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Wilson, D.S., Teagle, D.A.H., Alt, J.C., Banerjee, N.R., Umino, S., Miyashita, S., Acton, G.D., Anma, R., Barr, S.R., Belghoul, A., Carlut, J., Christie, D.M., Coggon, R.M., Cooper, K.M., Cordier, C., Crispini, L., Durand, S.R., Einaudi, F., Galli, L., Gao, Y., Geldmacher, J., Gilbert, L.A., Hayman, N.W., Herrero-Bervera, E., Hirano, N., Holter, S., Ingle, S., Jiang, S., Kalberkamp, U., Kerneklian, M., Koepke, J., Laverne, C., Lledo Vasquez, H.L., Maclennan, J., Morgan, S., Neo, N., Nichols, H.J., Park, H-S., Reichow, M.K., Sakuyama, T., Sano, T., Sandwell, R., Scheibner, B., Smith-Duque, C.E., Swift, S.A., Tartarotti, P., Tikku, A.A., Tominaga, M., Veloso, E.A., Yamasaki, T., Yamazaki, S. and Ziegler, C. (2006) Drilling to gabbro in intact ocean crust. Science, 312 (5776), 1016-1020. (doi:10.1126/science.1126090). (PMID:16627698)

Record type: Article

Abstract

Sampling an intact sequence of oceanic crust through lavas, dikes, and gabbros is necessary to advance the understanding of the formation and evolution of crust formed at mid-ocean ridges, but has been an elusive goal of scientific ocean drilling for decades. Recent drilling in the eastern Pacific Ocean in Hole 1256D reached gabbro within seismic layer 2, 1157 meters into crust formed at superfast spreading rate. The gabbros are the crystallized melt lenses that formed beneath a mid-ocean ridge. The depth at which gabbro was reached confirms predictions extrapolated from seismic experiments at modern ridges that melt lenses occur at shallower depths at faster spreading rates. The gabbros intrude metamorphosed sheeted dikes and have compositions similar to the overlying lavas, precluding formation of the cumulate lower oceanic crust from melt lenses so far penetrated by Hole 1256D.

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More information

Published date: 18 May 2006
Keywords: deep drilling, integrated ocean drilling program, ocean crust, gabbro
Organisations: Ocean and Earth Science
Learn more about Ocean and Earth Science research Learn more about Ocean and Earth Science research

Identifiers

Local EPrints ID: 37724
URI: http://eprints.soton.ac.uk/id/eprint/37724
DOI: doi:10.1126/science.1126090
ISSN: 0036-8075
PURE UUID: d1dd5b29-e306-41f7-bbd7-1f3212f6ce11
ORCID for D.A.H. Teagle: ORCID iD orcid.org/0000-0002-4416-8409
ORCID for R.M. Coggon: ORCID iD orcid.org/0000-0002-9228-9707

Catalogue record

Date deposited: 25 May 2006
Last modified: 16 Mar 2024 04:14

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Contributors

Author: D.S. Wilson
Author: D.A.H. Teagle ORCID iD
Author: J.C. Alt
Author: N.R. Banerjee
Author: S. Umino
Author: S. Miyashita
Author: G.D. Acton
Author: R. Anma
Author: S.R. Barr
Author: A. Belghoul
Author: J. Carlut
Author: D.M. Christie
Author: R.M. Coggon ORCID iD
Author: K.M. Cooper
Author: C. Cordier
Author: L. Crispini
Author: S.R. Durand
Author: F. Einaudi
Author: L. Galli
Author: Y. Gao
Author: J. Geldmacher
Author: L.A. Gilbert
Author: N.W. Hayman
Author: E. Herrero-Bervera
Author: N. Hirano
Author: S. Holter
Author: S. Ingle
Author: S. Jiang
Author: U. Kalberkamp
Author: M. Kerneklian
Author: J. Koepke
Author: C. Laverne
Author: H.L. Lledo Vasquez
Author: J. Maclennan
Author: S. Morgan
Author: N. Neo
Author: H.J. Nichols
Author: H-S. Park
Author: M.K. Reichow
Author: T. Sakuyama
Author: T. Sano
Author: R. Sandwell
Author: B. Scheibner
Author: C.E. Smith-Duque
Author: S.A. Swift
Author: P. Tartarotti
Author: A.A. Tikku
Author: M. Tominaga
Author: E.A. Veloso
Author: T. Yamasaki
Author: S. Yamazaki
Author: C. Ziegler

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