Fifty Years of Scientific Ocean Drilling

Author Posting. © Oceanography Society , 2019. This article is posted here by permission of Oceanography Society for personal use, not for redistribution. The definitive version was published in Becker, K., Austin, J. A., Jr., Exon, N., Humphris, S., Kastner, M., McKenzie, J. A., Miller, K. G., Suyehiro, K., & Taira, A. Fifty years of scientific ocean drilling. Oceanography, 32(1), (2019):17-21, doi:10.5670/oceanog.2019.110.Nearly a century after the first systematic study of the global ocean and seafloor by HMS Challenger (1871–1876), US scientists began to drill beneath the seafloor to unlock the secrets of the ~70% of Earth’s surface covered by the seas. Fifty years of scientific ocean drilling by teams of international partners has provided unparalleled advancements in Earth sciences. Here, we briefly review the history, impacts, and scientific achievements of five decades of coordinated scientific ocean drilling

Executive summary: "Mantle Frontier" workshop

The workshop on “Reaching the Mantle Frontier: Moho and Beyond� was held at the Broad Branch Road Campus of the Carnegie Institution of Washington on 9–11 September 2010. The workshop attracted seventy-four scientists and engineers from academia and industry in North America, Asia, and Europe.Reaching and sampling the mantle through penetration of the entire oceanic crust and the Mohorovi�ić discontinuity (Moho) has been a longstanding goal of the Earth science community. The Moho is a seismic transition, often sharp, from a region with compressional wave velocities (Vp) less than 7.5 km s-1 to velocities ~8 km s-1. It is interpreted in many tectonic settings, and particularly in tectonic exposures of oceanic lower crust, as the transition from igneous crust to mantle rocks that are the residues of melt extraction. Revealing the in situ geological meaning of the Moho is the heart of the Mohole project. Documenting ocean-crust exchanges and the nature and extent of the subseafloor biosphere have also become integral components of the endeavor. The purpose of the “Mantle Frontier� workshop was to identify key scientific objectives associated with innovative technology solutions along with associated timelines and costs for developments and implementation of this grandchallenge

The Tansei maru cruise KT92-7 and the Kaiko maru-5 cruise : Izu-Ogasawara Campaign 92 : Marine geophysical investigation of Izu-Ogasawara Arc system

航海番号: KH-92-2 ; 航海日程: May 20 - June 26, 199

The Tansei maru cruise KT92-7 and the Kaiko maru-5 cruise : Izu-Ogasawara Campaign 92 : Marine geophysical investigation of Izu-Ogasawara Arc system

航海番号: KH-92-2 ; 航海日程: May 20 - June 26, 199