Timing of carbonate mineral precipitation and fluid flow in sea- floor basalts, northwest Indian Ocean

Journal Article

The strontium isotope ratios of authigenic carbonates from sea-floor basalts have been determined. The samples include calcites from 57.2 Ma crust from Ocean Drilling Project (ODP) Site 715, and calcites, aragonites, and siderites from 63.7 Ma crust from ODP Site 707. At Site 715, calcite precipitation may have begun at any time after the basalts cooled, and it continued until approximately 31 Ma, or 26 m.y. after basalt eruption. At Site 707, aragonite and siderite did not begin to precipitate until at least 30 and 28 Ma, respectively. Calcite precipitation began at approximately 32 Ma and continued until 22 Ma. These ages suggest that vein mineral deposition and low-temperature fluid circulation in the ocean crust may continue for much longer periods of time than previously observed. -Authors

Full Text

Duke Authors

Cited Authors

  • Burns, SJ; Baker, PA; Elderfield, H

Published Date

  • 1992

Published In

Volume / Issue

  • 20 / 3

Start / End Page

  • 255 - 258

International Standard Serial Number (ISSN)

  • 0091-7613

Digital Object Identifier (DOI)

  • 10.1130/0091-7613(1992)020<0255:TOCMPA>2.3.CO