The hydrogeological regime of isolated sediment ponds in mid- oceanic ridges.

M. G. Langseth, R. D. Hyndman, Keir Becker, S. H. Hickman, M. H. Salisbury

Research output: Chapter in Book/Report/Conference proceedingChapter

32 Citations (Scopus)

Abstract

The determined temperature structure, together with the measurement of a subhydrostatic shut-in pressure of 0.9-1.5bars at a sub-bottom depth of 179m, suggests that water is still flowing down the hole and into the basement 5 yr after the hole was drilled. delta 18O values in calcite taken from veins in the basement demonstrate that a similar temperature structure existed before drilling. Resistivity logs indicate that the upper 400m of the crust is characterized by high porosity, but that the porosity drops markedly in the lower part of the section. This is consistent with direct measurements of permeability. These constraints, together with measured heat flow a values in the overlying sediment pond, suggest that the upper 400-500m of crust around Hole 395A is being cooled by the lateral flow of pore water moving at a rate of about 1m/yr.-from Authors

Original languageEnglish (US)
Title of host publicationInitial reports DSDP, Leg 78B, San Juan to Las Palmas
EditorsR.D. Hyndman, M.H. Salisbury
PublisherUS Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon
Pages825-837
Number of pages13
StatePublished - 1984
Externally publishedYes

Fingerprint

pond
porosity
crust
heat flow
sediment
electrical resistivity
porewater
calcite
temperature
drilling
permeability
water
rate

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Langseth, M. G., Hyndman, R. D., Becker, K., Hickman, S. H., & Salisbury, M. H. (1984). The hydrogeological regime of isolated sediment ponds in mid- oceanic ridges. In R. D. Hyndman, & M. H. Salisbury (Eds.), Initial reports DSDP, Leg 78B, San Juan to Las Palmas (pp. 825-837). US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon.

The hydrogeological regime of isolated sediment ponds in mid- oceanic ridges. / Langseth, M. G.; Hyndman, R. D.; Becker, Keir; Hickman, S. H.; Salisbury, M. H.

Initial reports DSDP, Leg 78B, San Juan to Las Palmas. ed. / R.D. Hyndman; M.H. Salisbury. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, 1984. p. 825-837.

Research output: Chapter in Book/Report/Conference proceedingChapter

Langseth, MG, Hyndman, RD, Becker, K, Hickman, SH & Salisbury, MH 1984, The hydrogeological regime of isolated sediment ponds in mid- oceanic ridges. in RD Hyndman & MH Salisbury (eds), Initial reports DSDP, Leg 78B, San Juan to Las Palmas. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, pp. 825-837.
Langseth MG, Hyndman RD, Becker K, Hickman SH, Salisbury MH. The hydrogeological regime of isolated sediment ponds in mid- oceanic ridges. In Hyndman RD, Salisbury MH, editors, Initial reports DSDP, Leg 78B, San Juan to Las Palmas. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon. 1984. p. 825-837
Langseth, M. G. ; Hyndman, R. D. ; Becker, Keir ; Hickman, S. H. ; Salisbury, M. H. / The hydrogeological regime of isolated sediment ponds in mid- oceanic ridges. Initial reports DSDP, Leg 78B, San Juan to Las Palmas. editor / R.D. Hyndman ; M.H. Salisbury. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, 1984. pp. 825-837
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