Deep crustal geothermal measurements, Hole 504B, Deep Sea Drilling Project Legs 69, 70, 83 and 92.

Keir Becker, M. G. Langseth, R. P. Von Herzen, R. N. Anderson, M. A. Hobart

Research output: Chapter in Book/Report/Conference proceedingChapter

21 Citations (Scopus)

Abstract

We report an extensive suite of geothermal measurements in the deepest borehole yet drilled into the oceanic crust, Hole 504B of the Deep Sea Drilling Project. Located in 5.9Ma crust of the Costa Rica Rift, Hole 504B was cored to a total depth of 1350m beneath the seafloor, through 274.5m of sediment and 1075.5m of basalt. The results indicate a dominantly conductive mode of heat transfer through the complete section, at 190+ or -10mW/m2. This is consistent with the predicted plate heat transfer and the hypothesis that the thick sediment cover acts as a seal against hydrothermal circulation of seawater to basement. For over 2yr after this sediment seal was penetrated, borehole temperatures were strongly depressed to approx 350-370m, indicating that ocean bottom water was flowing down the hole into the upper approx 100m of basement. This downhole flow was driven by the underpressure of the basement pore fluids.-from Authors

Original languageEnglish (US)
Title of host publicationInitial reports DSDP, Leg 83, Balboa to Balboa, Panama
EditorsR.N. Anderson
PublisherUS Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon
Pages405-418
Number of pages14
StatePublished - 1985
Externally publishedYes

Fingerprint

Deep Sea Drilling Project
heat transfer
seafloor
borehole
sediment
hydrothermal circulation
bottom water
oceanic crust
basalt
crust
seawater
fluid
temperature

ASJC Scopus subject areas

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

Cite this

Becker, K., Langseth, M. G., Von Herzen, R. P., Anderson, R. N., & Hobart, M. A. (1985). Deep crustal geothermal measurements, Hole 504B, Deep Sea Drilling Project Legs 69, 70, 83 and 92. In R. N. Anderson (Ed.), Initial reports DSDP, Leg 83, Balboa to Balboa, Panama (pp. 405-418). US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon.

Deep crustal geothermal measurements, Hole 504B, Deep Sea Drilling Project Legs 69, 70, 83 and 92. / Becker, Keir; Langseth, M. G.; Von Herzen, R. P.; Anderson, R. N.; Hobart, M. A.

Initial reports DSDP, Leg 83, Balboa to Balboa, Panama. ed. / R.N. Anderson. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, 1985. p. 405-418.

Research output: Chapter in Book/Report/Conference proceedingChapter

Becker, K, Langseth, MG, Von Herzen, RP, Anderson, RN & Hobart, MA 1985, Deep crustal geothermal measurements, Hole 504B, Deep Sea Drilling Project Legs 69, 70, 83 and 92. in RN Anderson (ed.), Initial reports DSDP, Leg 83, Balboa to Balboa, Panama. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, pp. 405-418.
Becker K, Langseth MG, Von Herzen RP, Anderson RN, Hobart MA. Deep crustal geothermal measurements, Hole 504B, Deep Sea Drilling Project Legs 69, 70, 83 and 92. In Anderson RN, editor, Initial reports DSDP, Leg 83, Balboa to Balboa, Panama. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon. 1985. p. 405-418
Becker, Keir ; Langseth, M. G. ; Von Herzen, R. P. ; Anderson, R. N. ; Hobart, M. A. / Deep crustal geothermal measurements, Hole 504B, Deep Sea Drilling Project Legs 69, 70, 83 and 92. Initial reports DSDP, Leg 83, Balboa to Balboa, Panama. editor / R.N. Anderson. US Govt. Printing Office; UK distributors, IPOD Committee, NERC, Swindon, 1985. pp. 405-418
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