PANGAEA_867518 Annotated record of the detailed examination of Mn deposits from DSDP Site 49, Leg 6 (Cores 49A-1, 49-1) Heezen, Bruce C; Fischer, A G; Boyce, Robert E; Bukry, David; Douglas, Robert G; Garrison, Robert E; Kling, S A; Krasheninnikov, Valery A; Lisitzin, Alexander P; Pimm, Anthony C Annotated record of the detailed examination of Mn deposits from DSDP Site 49, Leg 6 (Cores 49A-1, 49-1) 1971 PANGAEA Dataset Supplement to: Heezen, Bruce C; Fischer, A G; Boyce, Robert E; Bukry, David; Douglas, Robert G; Garrison, Robert E; Kling, S A; Krasheninnikov, Valery A; Lisitzin, Alexander P; Pimm, Anthony C (1971): Site 49. In: Fischer, A.G.; et al., Initial Reports of the Deep Sea Drilling Project, 6, Initial Reports of the Deep Sea Drilling Project, 6, U.S. Government Printing Office, VI, 171-194, https://doi.org/10.2973/dsdp.proc.6.107.1971 https://doi.pangaea.de/10.1594/PANGAEA.867518 Earth Science Event label Identification Sample code/label DEPTH, sediment/rock Position Deposit type Quantity of deposit Size Substrate type Sediment type Comment Description geoscientificInformation 6-49 6-49A Drilling/drill rig Leg6 Visual description Glomar Challenger 1969-07-02 1969-07-02 Complete 32.4017 32.4017 156.6 156.6 0.1 m (DEPTH, sediment/rock) 11.2 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

Leobener Str.

Bremen Bremen 28359 Germany online 63 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

At Sites 47 and 48, impenetrable and cherty Upper Cretaceous chalks were found. The upper part of what infer to be lower Cretaceous is even more reflective, and likely to be very cherty (and was found to be cherty in the Vema core). It became clear that basement could only be reached where the Upper Cretaceous and the upper part of the lower Cretaceous are absent. However, west of Site 48, the R/V Argo record showed an area in which the Upper Cretaceous has wedged out down dip, and the Lower Cretaceous is thinning out by loss of the strongly reflective beds at the top. This area appeared to offer the best chance for sampling the lowermost transparent layer. Two holes were drilled: Hole 49.0 and Hole 49.1 after Hole 49.0 stopped at 18 m. Beds near the base of sedimentary sequence revealed by the seismic profiles are found to be of early Cretaceous (Neocomian) or latest Jurassic (Tithonian) age, and of pelagic facies. The crust under the Shatsky Rise is latest Jurassic or older. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.867518"! ** 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.

https://doi.org/10.2973/dsdp.proc.6.107.1971 Site 49 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.deepseadrilling.org/ DSDP https://www-odp.tamu.edu:443/glomar.html Glomar Challenger DIF 9.4 2026-06-15