Geothermal measurements from drilling of sediments near the Galapagos spreading center, 86oW, Deep Sea Drilling Project Leg 70.

Keir Becker, R. P. Von Herzen, S. Karato

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)

Abstract

Heat transfer processes at the mounds area of the Galapagos Spreading Center at 86oW are revealed by temperatures measured at approx 10m intervals in the 30+ or -10m sediment at each of 12 holes at Leg 70, Sites 506-509. Two hundred 14 needle-probe values show a significant linear increase of thermal conductivity with depth in each hole. About half of the temperature-thermal resistance profiles are nonlinear and are fit to a steady-state, vertical pore-water convection model. Results indicate high and variable total heat flow and localized hydrothermal discharge at = or <10-8m/s, associated with individual mounds. Recharge at similar rates is indicated in the low heat-flow belt approx 5km S of the mounds. Possible slow entrained recharge within 100m of discharging mounds is suggested. At Site 510, temperatures in the 114m sediment cover on 2.7Ma old crust are linear, suggesting that the hydraulic resistance of this layer is sufficient to seal off free hydrothermal exchange between basement and bottom water.-Authors

Original languageEnglish (US)
Title of host publicationInitial reports DSDP, Leg 70, Balboa to Callao
EditorsJ. Honnorez, R.P. Von Herzen
PublisherUS Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon
Pages445-458
Number of pages14
StatePublished - 1983
Externally publishedYes

Fingerprint

spreading center
Deep Sea Drilling Project
drilling
heat flow
recharge
sediment
temperature
thermal conductivity
low flow
bottom water
heat transfer
porewater
convection
probe
crust
hydraulics

ASJC Scopus subject areas

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

Cite this

Becker, K., Von Herzen, R. P., & Karato, S. (1983). Geothermal measurements from drilling of sediments near the Galapagos spreading center, 86oW, Deep Sea Drilling Project Leg 70. In J. Honnorez, & R. P. Von Herzen (Eds.), Initial reports DSDP, Leg 70, Balboa to Callao (pp. 445-458). US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon.

Geothermal measurements from drilling of sediments near the Galapagos spreading center, 86oW, Deep Sea Drilling Project Leg 70. / Becker, Keir; Von Herzen, R. P.; Karato, S.

Initial reports DSDP, Leg 70, Balboa to Callao. ed. / J. Honnorez; R.P. Von Herzen. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, 1983. p. 445-458.

Research output: Chapter in Book/Report/Conference proceedingChapter

Becker, K, Von Herzen, RP & Karato, S 1983, Geothermal measurements from drilling of sediments near the Galapagos spreading center, 86oW, Deep Sea Drilling Project Leg 70. in J Honnorez & RP Von Herzen (eds), Initial reports DSDP, Leg 70, Balboa to Callao. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, pp. 445-458.
Becker K, Von Herzen RP, Karato S. Geothermal measurements from drilling of sediments near the Galapagos spreading center, 86oW, Deep Sea Drilling Project Leg 70. In Honnorez J, Von Herzen RP, editors, Initial reports DSDP, Leg 70, Balboa to Callao. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon. 1983. p. 445-458
Becker, Keir ; Von Herzen, R. P. ; Karato, S. / Geothermal measurements from drilling of sediments near the Galapagos spreading center, 86oW, Deep Sea Drilling Project Leg 70. Initial reports DSDP, Leg 70, Balboa to Callao. editor / J. Honnorez ; R.P. Von Herzen. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, 1983. pp. 445-458
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