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Basalt density, basement age, and intrusive/extrusive relations from DSDP Legs 2 through 7, 9, and 14

Densities of layer 2 basalt recovered during the Deep Sea Drilling Project have been found to decrease steadily with age, a finding ascribed to progressive submarine weathering in the context of sea-floor spreading. The least-squares solution for 52 density measurements gives a rate of decrease in density of (Delta p)/(Delta t) = -0.0046 g per ccm m.y. = -16 percent per 100 m.y., which is in excellent agreement with earlier estimates based on observed chemical depletion rates of dredged oceanic basalt. Weathering of sea-floor basalt, should it penetrate to any considerable depth in layer 2, will decrease layer 2 seismic refraction velocities, act as a source of geothermal heat, and substantially influence the chemistry of sea water and the overlying column of sediment.

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Cite this as

Salisbury, Matthew H, Christensen, Nikolas I (1973). Dataset: Basalt density, basement age, and intrusive/extrusive relations from DSDP Legs 2 through 7, 9, and 14. https://doi.org/10.1594/PANGAEA.711683

DOI retrieved: 1973

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.711683
Author Salisbury, Matthew H
Given Name Matthew H
Family Name Salisbury
More Authors
Christensen, Nikolas I
Source Creation 1973
Publication Year 1973
Resource Type application/zip - filename: Salisbury-1973
Subject Areas
Name: Lithosphere

Related Identifiers
Title: Progressive weathering of submarine basalt with age: further evidence of sea-floor spreading
Identifier: https://doi.org/10.1130/0091-7613(1973)1%3C63:PWOSBW%3E2.0.CO;2
Type: DOI
Relation: IsSupplementTo
Year: 1973
Source: Geology
Authors: Salisbury Matthew H , Christensen Nikolas I .