Drilling to gabbro in intact ocean crust


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).

Download

Full text not available from this repository.

Description/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.

Item Type: Article
ISSNs: 0036-8075 (print)
1095-9203 (electronic)
Keywords: deep drilling, integrated ocean drilling program, ocean crust, gabbro
Subjects: G Geography. Anthropology. Recreation > GC Oceanography
Q Science > QE Geology
Divisions: University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES)
Faculty of Natural and Environmental Sciences > Ocean and Earth Science
ePrint ID: 37724
Date Deposited: 25 May 2006
Last Modified: 27 Mar 2014 18:23
URI: http://eprints.soton.ac.uk/id/eprint/37724

Actions (login required)

View Item View Item