8
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Dating the Growth of Oceanic Crust at a Slow-Spreading Ridge

      Science
      American Association for the Advancement of Science (AAAS)

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Nineteen uranium-lead zircon ages of lower crustal gabbros from Atlantis Bank, Southwest Indian Ridge, constrain the growth and construction of oceanic crust at this slow-spreading midocean ridge. Approximately 75% of the gabbros accreted within error of the predicted seafloor magnetic age, whereas approximately 25% are significantly older. These anomalously old samples suggest either spatially varying stochastic intrusion at the ridge axis or, more likely, crystallization of older gabbros at depths of approximately 5 to 18 kilometers below the base of crust in the cold, axial lithosphere, which were uplifted and intruded by shallow-level magmas during the creation of Atlantis Bank.

          Related collections

          Author and article information

          Journal
          Science
          Science
          American Association for the Advancement of Science (AAAS)
          0036-8075
          1095-9203
          October 28 2005
          October 28 2005
          : 310
          : 5748
          : 654-657
          Article
          10.1126/science.1116349
          16254183
          95f518ab-b5f9-4d48-8d2c-d8d5aa510e42
          © 2005
          History

          Comments

          Comment on this article