(Table 1) Coarse-fraction (0.1 to 0.05 mm) mineralogy at DSDP Leg 55 Holes, supplement to: Murdmaa, Ivar O; Avdeiko, G P (1980): Volcaniclastic constituents in the Leg 55 sediments. In: Jackson, ED; Koisumi, I; et al., (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 55, 503-505


This chapter was previously intended to trace volcanic episodes through the Neogene and Pleistocene geological history recorded in the sedimentary sections drilled on the Emperor seamounts. Drilling disturbance, poor core recovery, and incomplete stratigraphic sections recovered from the seamounts have frustrated that plan, however. Moreover, the Leg 55 sedimentologists found in their smear-slide studies that transported island-arc tephra is scarce in the sediments, if present at all. So we have restricted our objective to description of the volcaniclastic admixture in sediments, as determined by mineralogical and geochemical data. We studied geochemistry of bulk samples (see Murdmaa et al., 1980), coarse-fraction mineralogy, and additional smear slides. The results obtained, however, do not tell much more about the volcaniclastic matter than did shipboard core descriptions.

1 = present.

DOI https://doi.org/10.1594/PANGAEA.823308
Related Identifier https://doi.org/10.2973/dsdp.proc.55.119.1980
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.823308
Creator Murdmaa, Ivar O; Avdeiko, G P
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 1980
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 286 data points
Discipline Earth System Research
Spatial Coverage (170.020W, 37.981S, 170.591E, 44.777N); North Pacific/SEDIMENT POND; North Pacific/TERRACE; North Pacific/SEAMOUNT
Temporal Coverage Begin 1977-08-01T00:00:00Z
Temporal Coverage End 1977-08-16T00:00:00Z