A Caltech Library Service

Mantle Plumes and Mantle Sources

Farley, K. A. and Craig, H. (1992) Mantle Plumes and Mantle Sources. Science, 258 (5083). p. 821. ISSN 0036-8075.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


Basalts from many ocean islands define elongate arrays in Sr-Nd-Pb isotopic space; these likely reflect the dominance of binary mixing of mantle sources in intraplate volcanism. S. R. Hart et al. (1) observe that when these arrays are projected onto a ternary diagram bounded by mantle end-members DMM [depleted mid-ocean ridge basalt (MORB) mantle], HIMU (high U/Pb mantle), and EMI (enriched mantle 1), they are subparallel and point toward a composition on the DMM-HIMU join. Hart et al. suggest this composition is associated with a high ^3He/^4He ratio (>30 R_A) and therefore cannot be a ubiquitous upper-mantle mixture of DMM and HIMU (both of which have ^3He/^4He < 9 R_A). They instead argue in favor of a new isotopic component, resident in a deep mantle "Focus Zone" (FOZO), which is characterized by a high ^3He/^4He ratio or which acquires helium with a high ^3He/^4He signature from the core.

Item Type:Article
Related URLs:
URLURL TypeDescription
Farley, K. A.0000-0002-7846-7546
Additional Information:© 1992 American Association for the Advancement of Science. Received 1 June 1992; accepted 17 August 1992.
Issue or Number:5083
Record Number:CaltechAUTHORS:20130628-094256518
Persistent URL:
Official Citation:Mantle Plumes and Mantle Sources K. A. Farley, H. Craig, Stanley R. Hart, E. H. Hauri, L. A. Oschmann and J. A. Whitehead Science New Series, Vol. 258, No. 5083 (Oct. 30, 1992), pp. 821-822 Published by: American Association for the Advancement of Science Stable URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39137
Deposited By: Tony Diaz
Deposited On:01 Jul 2013 23:41
Last Modified:03 Oct 2019 05:04

Repository Staff Only: item control page