Skip to main content
Journal cover image

The origin of celestite in deep-sea carbonate sediments

Publication ,  Journal Article
Baker, PA; Bloomer, SH
Published in: Geochimica et Cosmochimica Acta
January 1, 1988

Several celestite nodules were recovered on DSDP Leg 90 from four drilling sites on the Lord Howe Rise, southwest Pacific Ocean. The sediments at these sites are predominantly very pure calcareous nannofossil oozes and chalks. As a result of a higher-than average accumulation rate, they undergo relatively rapid burial diagenesis, which causes the expulsion of Sr from the biogenic calcite, to the interstitial waters. Another result of the high accumulation rate is the occurrence of microbial sulfate reduction in the interstitial waters. The downcore Sr increase is proportionately greater than the sulfate decrease, and celestite precipitates below about 100 m subbottom at each of these sites. The celestite contains high concentrations of many substituent cations: 4.3-7.8 mole% BaSO4, 1.7-6.4 mole% CaSO4, 1100-2600 ppm Al, and 400-750 ppm K. Ion activity products of Sr and sulfate at each site were calculated from the Pitzer equations and the measured concentrations of porewater constituents, and are in close agreement with the celestite solubility product corrected for in situ temperatures and pressures. Strontium concentrations of the porewaters are nearly at equilibrium with respect to celestite, and are controlled by the extent of microbial sulfate reduction. Celestite solubility increases with increasing water depth, in excellent agreement with values of the standard state partial molal volume change. © 1988.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Geochimica et Cosmochimica Acta

DOI

ISSN

0016-7037

Publication Date

January 1, 1988

Volume

52

Issue

2

Start / End Page

335 / 339

Related Subject Headings

  • Geochemistry & Geophysics
  • 3705 Geology
  • 3703 Geochemistry
  • 0406 Physical Geography and Environmental Geoscience
  • 0403 Geology
  • 0402 Geochemistry
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Baker, P. A., & Bloomer, S. H. (1988). The origin of celestite in deep-sea carbonate sediments. Geochimica et Cosmochimica Acta, 52(2), 335–339. https://doi.org/10.1016/0016-7037(88)90088-9
Baker, P. A., and S. H. Bloomer. “The origin of celestite in deep-sea carbonate sediments.” Geochimica et Cosmochimica Acta 52, no. 2 (January 1, 1988): 335–39. https://doi.org/10.1016/0016-7037(88)90088-9.
Baker PA, Bloomer SH. The origin of celestite in deep-sea carbonate sediments. Geochimica et Cosmochimica Acta. 1988 Jan 1;52(2):335–9.
Baker, P. A., and S. H. Bloomer. “The origin of celestite in deep-sea carbonate sediments.” Geochimica et Cosmochimica Acta, vol. 52, no. 2, Jan. 1988, pp. 335–39. Scopus, doi:10.1016/0016-7037(88)90088-9.
Baker PA, Bloomer SH. The origin of celestite in deep-sea carbonate sediments. Geochimica et Cosmochimica Acta. 1988 Jan 1;52(2):335–339.
Journal cover image

Published In

Geochimica et Cosmochimica Acta

DOI

ISSN

0016-7037

Publication Date

January 1, 1988

Volume

52

Issue

2

Start / End Page

335 / 339

Related Subject Headings

  • Geochemistry & Geophysics
  • 3705 Geology
  • 3703 Geochemistry
  • 0406 Physical Geography and Environmental Geoscience
  • 0403 Geology
  • 0402 Geochemistry