Scientific Drilling
Scientific Drilling
SD
Articles | Volume 4
Articles | Volume 4
https://doi.org/10.2204/iodp.sd.4.01.2007
© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.2204/iodp.sd.4.01.2007
© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 4
01 Mar 2007
 | 01 Mar 2007

IODP Expeditions 309 and 312 Drill an Intact Section of Upper Oceanic Basement into Gabbros

J. C. Alt, D. A. H. Teagle, S. Umino, S. Miyashita, N. R. Banerjee, D. S. Wilson, and the IODP Expeditions 309 and 312 Scientists, and the ODP Leg 206 Scientific Party

Abstract. The Integrated Ocean Drilling Program’s (IODP) Expeditions 309 and 312 successfully completed the first sampling of an intact section of upper oceanic crust, through lavas and the sheeted dikes into the uppermost gabbros. Hole 1256D, which was initiated on the Ocean Drilling Program’s (ODP) Leg 206, now penetrates to > 1500 mbsf and > 1250 m sub-basement. The first gabbroic rocks were encountered at 1407 mbsf. Below this, the hole penetrates ~100 m into a complex zone of fractionated gabbros intruded into contact metamorphosed dikes.

doi:10.2204/iodp.sd.4.01.2007

How to cite. Alt, J. C., Teagle, D. A. H., Umino, S., Miyashita, S., Banerjee, N. R., Wilson, D. S., and the IODP Expeditions 309 and 312 Scientists, and the ODP Leg 206 Scientific Party: IODP Expeditions 309 and 312 Drill an Intact Section of Upper Oceanic Basement into Gabbros, Sci. Dril., 4, 4–10, https://doi.org/10.2204/iodp.sd.4.01.2007, 2007.