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<datestamp>2018-01-11</datestamp>
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<title lang=en>Deep sampling of the crust formed at Mid-Ocean Ridges : scientific ocean drilling provides "in-depth" perspective</title>
<creator>Ildefonse, Benoit</creator>
<creator>Rona, P.</creator>
<creator>Blackman, D. K.</creator>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<source>ISSN: 1042-8275</source>
<source>EISSN: 2377-617X</source>
<source>Oceanography</source>
<publisher>Oceanography Society</publisher>
<identifier>hal-00407192</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00407192</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00407192</source>
<source>Oceanography, Oceanography Society, 2007, 20 (1), pp.66-77</source>
<language>en</language>
<subject lang=sl>ODP</subject>
<subject lang=sl>IODP</subject>
<subject>[SDU.STU.OC] Sciences of the Universe [physics]/Earth Sciences/Oceanography</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>In April 1961, 13.5 m of basalts were drilled off Guadalupe Island about 240 km west of Mexico's Baja California, together with a few hundred meters of Miocene sediments, in about 3500 m of water. This fi rst-time exploit, reported by John Steinbeck for Life magazine, aimed to be the test phase for the considerably more ambitious Mohole project, whose objective was to drill through the oceanic crust down to Earth's mantle (Lill and Bascom, 1959; Bascom, 1961). Born in the late 1950s, the Mohole project unfortunately ended in muddy waters and was terminated by the United States Congress in 1965 (Shor, 1985; Greenberg, 1971). Undeterred, the scientifi c community rallied again to launch the Deep Sea Drilling Project (DSDP) in 1968, followed by the Ocean Drilling Program (ODP) in 1985, and the Integrated Ocean Drilling Program (IODP) in 2003. These programs have provided solutions to some of the most pressing and interesting problems in ocean and earth science (see, for example, Oceanography 19-4, December 2006).the early 1970s, almost 15 years after the fi rst Mohole attempt, attendees of a Penrose fi eld conference (Conference Participants, 1972) formulated the concept of a layered oceanic crust composed of lavas, underlain by sheeted dikes, then gabbros (corresponding to the seismic layers 2A, 2B, and 3, respectively), which themselves overlay mantle peridotites. Deep drilling into the oceanic crust would provide the ground truth for the Penrose model; the fl ame of the Mohole project still burned. This article draws from results of more than 30 years of ocean drilling at mid-ocean ridges or in older igneous oceanic crust and briefl y reviews some important milestones that improved understanding of crustalaccretion processes at mid-ocean ridges. Figure 1 shows the locations of the numerous DSDP, ODP, and IODP expeditions to which we refer; Table 1 lists site locations.</description>
<date>2007</date>
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