Zircon Dating of Oceanic Crustal Accretion-Reference-Cited by-同舟云学术

Zircon Dating of Oceanic Crustal Accretion

Published:2009-02-20 Issue:5917 Volume:323 Page:1048-1050
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Lissenberg C. Johan¹²³,Rioux Matthew¹²³,Shimizu Nobumichi¹²³,Bowring Samuel A.¹²³,Mével Catherine¹²³

Affiliation:

1. Equipe de Géosciences Marines, Institut de Physique du Globe de Paris, 4 Place Jussieu, 75252 Paris Cedex 05, France.

2. Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.

3. Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Abstract

Most of Earth's present-day crust formed at mid-ocean ridges. High-precision uranium-lead dating of zircons in gabbros from the Vema Fracture Zone on the Mid-Atlantic Ridge reveals that the crust there grew in a highly regular pattern characterized by shallow melt delivery. Combined with results from previous dating studies, this finding suggests that two distinct modes of crustal accretion occur along slow-spreading ridges. Individual samples record a zircon date range of 90,000 to 235,000 years, which is interpreted to reflect the time scale of zircon crystallization in oceanic plutonic rocks.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference26 articles.

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