Temperature measurements at site 395, ODP Leg 109

J. Kopietz, Keir Becker, Y. Hamano

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Borehole temperatures in Hole 395A were continuously logged during Leg 109, over 10yr after the hole was drilled during Leg 45 and about 5yr after temperatures in the hole were previously measured during Leg 78B. Temperatures measured during Leg 109 indicate a vigorous flow of ocean bottom water down the 112m of casing and into the permeable upper basement, at a rate virtually undiminished since Leg 78B. The temperature gradient in the sediments was measured at the nearby Hole 395C, allowing the rate of flow down Hole 395A to be estimated at about 10-100m/hr. The temperature gradient in the deeper section is consistent with a heat flow of about 200mW/m2, close to the value predicted for the 7.3Ma old crust at the site. -from Authors

Original languageEnglish (US)
Pages (from-to)197-203
Number of pages7
JournalUnknown Journal
StatePublished - Jan 1 1990
Externally publishedYes

Fingerprint

Ocean Drilling Program
Temperature measurement
temperature measurement
Leg
Thermal gradients
temperature gradient
Temperature
temperature
Boreholes
temperature gradients
bottom water
heat flow
Sediments
seafloor
borehole
ocean bottom
casing
crust
Heat transfer
boreholes

ASJC Scopus subject areas

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

Cite this

Temperature measurements at site 395, ODP Leg 109. / Kopietz, J.; Becker, Keir; Hamano, Y.

In: Unknown Journal, 01.01.1990, p. 197-203.

Research output: Contribution to journalArticle

Kopietz, J. ; Becker, Keir ; Hamano, Y. / Temperature measurements at site 395, ODP Leg 109. In: Unknown Journal. 1990 ; pp. 197-203.
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AB - Borehole temperatures in Hole 395A were continuously logged during Leg 109, over 10yr after the hole was drilled during Leg 45 and about 5yr after temperatures in the hole were previously measured during Leg 78B. Temperatures measured during Leg 109 indicate a vigorous flow of ocean bottom water down the 112m of casing and into the permeable upper basement, at a rate virtually undiminished since Leg 78B. The temperature gradient in the sediments was measured at the nearby Hole 395C, allowing the rate of flow down Hole 395A to be estimated at about 10-100m/hr. The temperature gradient in the deeper section is consistent with a heat flow of about 200mW/m2, close to the value predicted for the 7.3Ma old crust at the site. -from Authors

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