Wilson, Douglas S.; Teagle, Damon A. H.; Alt, Jeffrey C.; Banerjee, Neil R.; Umino, Susumu; Miyashita, Sumio; Acton, Gary D.; Anma, Ryo; Barr, Samantha R.; Belghoul, Akram; Carlut, Julie; Christie, David M.; Coggon, Rosalind M.; Cooper, Kari M.; Cordier, Carole; Crispini, Laura; Durand, Sedelia Rodriguez; Einaudi, Florence; Galli, Laura; Gao, Yongjun; Geldmacher, Joerg; Gilbert, Lisa A.; Hayman, Nicholas W.; Herrero-Bervera, Emilio; Hirano, Nobuo; Holter, Sara; Ingle, Stephanie; Jiang, Shijun; Kalberkamp, Ulrich; Kerneklian, Marcie; Koepke, Juergen; Laverne, Christine; Vasquez, Haroldo L. Lledo; Maclennan, John; Morgan, Sally; Neo, Natsuki; Nichols, Holly J.; Park, Sung-Hyun; Reichow, Marc K.; Sakuyama, Tetsuya; Sano, Takashi; Sandwell, Rachel; Scheibner, Birgit; Smith-Duque, Chris E.; Swift, Stephen A.; Tartarotti, Paola; Tikku, Anahita A.; Tominaga, Masako; Veloso, Eugenio A.; Yamasaki, Toru; Yamazaki, Shusaku; Ziegler, Christa (2006): Drilling to gabbro in intact ocean crust. American Association for the Advancement of Science, Washington, DC, United States, Science, 312 (5776), 1016-1020, georefid:2006-061488

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 it 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 a 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 mid-ocean ridges: 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.
Coverage:
West: -91.5600 East: -91.5600 North: 6.4400 South: 6.4400
Relations:
Expedition: 206
Site: 206-1256
Expedition: 309
Site: 309-U1256
Expedition: 312
Site: 312-U1256
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.1126/science.1126090 (c.f. for more detailed metadata)
Data download: application/pdf
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