PANGAEA_873851 Annotated record of the detailed examination of Mn deposits from DSDP Leg 64 (Holes 474, 474A, 475, 479, 480, 481A)1982 Curray, Joseph R; Moore, David G Annotated record of the detailed examination of Mn deposits from DSDP Leg 64 (Holes 474, 474A, 475, 479, 480, 481A)1982 1982 PANGAEA Dataset Supplement to: Vacquier, Victor; Simoneit, Bernd R T; Schrader, Hans-Jürgen; Saunders, Andrew D; Rueda-Gaxiola, Jaime; Niemitz, Jeffrey W; Molina-Cruz, Adolfo; Matoba, Y; Lyle, Mitchell W; Kelts, Kerry; Kastner, Miriam; Guerrero-Garcia, Jose; Gieskes, Joris M; Fornari, Daniel J; Einsele, Gerhard; Aubry, Marie-Pierre; Aguayo, J Eduardo; Curray, Joseph R; Moore, David G (1982): Initial Reports of the Deep Sea Drilling Project. U.S. Government Printing Office, LXIV, 507 pp + 1303 pp, https://doi.org/10.2973/dsdp.proc.64.1982 https://doi.pangaea.de/10.1594/PANGAEA.873851 Earth Science Event label Identification Sample code/label DEPTH, sediment/rock Position Deposit type Quantity of deposit Substrate type Sediment type Comment Description geoscientificInformation 64-474 64-474A 64-475 64-479 64-480 64-481A Drilling/drill rig Leg64 Visual description Glomar Challenger 1978-12-02 1979-01-03 Complete 22.9593 27.9017 -111.6557 -108.97800000000001 2.7 m (DEPTH, sediment/rock) 497.95 m (DEPTH, sediment/rock) DSDP Deep Sea Drilling Project NOAA-MMS NOAA and MMS Marine Minerals Geochemical Database unrestricted CC-BY-3.0: Creative Commons Attribution 3.0 Unported English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 150 data points text/tab-separated-values Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN

The origin and evolution of passive continental margins are of great scientific interest and economic importance. During DSDP Leg 64 the Glomar Challenger drilled at eight sites (474-481) in the Gulf of California region. The Gulf of California presented a singular example of tectonics and sedimentation in a very young ocean, being formed by translation and oblique rifting. The sedimentation of the region is hemipelagic, rapid, and largely dominated by siliceous microfossils.Sites 474, 475, and 476 form a transect from oceanic crust to continental crust at the southern tip of Baja California in order to define passive-margin subsidence during the early post-rifting phase. Sites 477, 478, and 481 investigate of the nature of young ocean crust in the Guaymas Basin, where high accumulation rates are common and variable high heat flow indicates active rifting and hydrothermal activity. Sites 479 and 480, are situated on the Guaymas Basin Slope above the proto-Gulf sequences. Interest focused on the paleoceanography of laminated, homogeneous diatom-rich, anoxic sediments within the zone of low oxygen. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.873851"! ** From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.

http://www.deepseadrilling.org/ DSDP https://doi.org/10.2973/dsdp.proc.64.1982 Initial Reports of the Deep Sea Drilling Project https://doi.org/10.7289/V52Z13FT The NOAA and MMS Marine Minerals Geochemical Database https://doi.org/10.7289/V53X84KN The NOAA and MMS Marine Minerals Bibliography https://wiki.pangaea.de/wiki/NOAA-MMS NOAA-MMS https://www-odp.tamu.edu:443/glomar.html Glomar Challenger DIF 9.4 2026-04-30