| Dating the growth of oceanic crust at a slow-spreading ridge. | |
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MedLine Citation:
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PMID: 16254183 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Joshua J Schwartz; Barbara E John; Michael J Cheadle; Elena A Miranda; Craig B Grimes; Joseph L Wooden; Henry J B Dick |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Science (New York, N.Y.) Volume: 310 ISSN: 1095-9203 ISO Abbreviation: Science Publication Date: 2005 Oct |
Date Detail:
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Created Date: 2005-10-28 Completed Date: 2005-11-23 Revised Date: 2007-03-19 |
Medline Journal Info:
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Nlm Unique ID: 0404511 Medline TA: Science Country: United States |
Other Details:
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Languages: eng Pagination: 654-7 Citation Subset: - |
Affiliation:
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Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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