Geothermal state of DSDP Holes 333A, 395A and 534A

results from the DIANAUT program

R. Gable, R. H. Morin, Keir Becker

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Heat-flow values determined from the DIANAUT program provide insight into the geothermal state of three DSDP holes situated on the western flank of the Mid-Atlantic Ridge. Very low values observed in 3.5-m.y.-old crust at Hole 333A decrease with depth and indicate persistent basement cooling due to cold water circulation in the porous level of the upper ocean crust. Cold ocean bottomwater continues to invade the upper level of fractured 7.3-m.y.-old basement at Hole 395A, but temperature v. time records show large-scale temperature fluctuations. The 154-m.y.-old crust at Hole 534A exhibits a relatively steady thermal state with a heat flow close to theoretical values for a conductively cooling plate; small variations in the thermal gradient recorded in this well probably represent very slow and subtle movement of borehole fluids. -from Authors

Original languageEnglish (US)
Pages (from-to)505-508
Number of pages4
JournalGeophysical Research Letters
Volume19
Issue number5
StatePublished - 1992

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Deep Sea Drilling Project
crust
crusts
heat flow
basements
heat transmission
cooling
oceans
upper ocean
water circulation
cold water
temperature scales
borehole
boreholes
temperature
ridges
fluid
ocean
gradients
programme

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Geothermal state of DSDP Holes 333A, 395A and 534A : results from the DIANAUT program. / Gable, R.; Morin, R. H.; Becker, Keir.

In: Geophysical Research Letters, Vol. 19, No. 5, 1992, p. 505-508.

Research output: Contribution to journalArticle

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