Geochemistry of secondary carbonates in Leg 115 basalts: tracers of basalt/seawater interaction

S. J. Burns, Peter K Swart, P. A. Baker

Research output: Chapter in Book/Report/Conference proceedingChapter

5 Scopus citations

Abstract

This report presents the results of a study of the stable isotopic and chemical composition of secondary carbonate minerals precipitated within basalts at Ocean Drilling Program Sites 707 and 715. The geochemistry of Site 715 samples indicates that they precipitated from seawater-dominated fluids, at low temperatures, as is typical of secondary carbonates from most Deep Sea Drilling Project sites. Site 707 carbonates precipitated at low temperatures in a fairly closed system, in which basalt-seawater interaction has greatly influenced the chemistry of the pore fluids. The reactions occurring within the system before and in conjunction with secondary carbonate precipitation include oxidation of isotopically light methane, derived from fluids circulating within the basalts, and reduction of substantial amounts of iron and manganese oxides from the basalts. -from Authors

Original languageEnglish (US)
Title of host publicationProc., scientific results, ODP, Leg 115, Mascarene Plateau
EditorsR.A. Duncan, J. Backman, L.C. Peterson
PublisherODP, Texas A&M University, College Station; UK distributors, IPOD Committee, NERC, Swindon
Pages93-101
Number of pages9
StatePublished - 1990

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ASJC Scopus subject areas

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

Cite this

Burns, S. J., Swart, P. K., & Baker, P. A. (1990). Geochemistry of secondary carbonates in Leg 115 basalts: tracers of basalt/seawater interaction. In R. A. Duncan, J. Backman, & L. C. Peterson (Eds.), Proc., scientific results, ODP, Leg 115, Mascarene Plateau (pp. 93-101). ODP, Texas A&M University, College Station; UK distributors, IPOD Committee, NERC, Swindon.