Argon-Lead Isotopic Correlation in Mid-Atlantic Ridge Basalts
- 29 January 1999
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 283 (5402) , 666-668
- https://doi.org/10.1126/science.283.5402.666
Abstract
Step-heating analyses for Mid-Atlantic Ridge glass samples show that maximum 40 Ar/ 36 Ar values correlate with 206,207,208 Pb/ 204 Pb. These correlations hold for the whole Atlantic Ocean and therefore are unlikely to result from shallow-level contamination processes. Instead, they are taken as mixing hyperbolae between the degassed-depleted upper mantle and a recycled component characterized by high 206 Pb/ 204 Pb ratios (19 to 21) and low 40 Ar/ 36 Ar ratios (300 to 1000). These relations imply that argon may also be a tracer of mantle recycling.Keywords
This publication has 26 references indexed in Scilit:
- Mantle heterogeneities beneath the South Atlantic: a NdSrPb isotope study along the Mid-Atlantic Ridge (3°S–46°S)Published by Elsevier ,1999
- Plutonium-Fission Xenon Found in Earth's MantleScience, 1998
- Osmium-strontium-neodymium-lead isotopic covariations in mid-ocean ridge basalt glasses and the heterogeneity of the upper mantleEarth and Planetary Science Letters, 1997
- A primitive plume neon component in MORB: The Shona ridge-anomaly, South Atlantic (51–52°S)Earth and Planetary Science Letters, 1995
- Mantle neon and atmospheric contaminationEarth and Planetary Science Letters, 1993
- 40Ar36Ar in MORB glasses: constraints on atmosphere and mantle evolutionEarth and Planetary Science Letters, 1985
- K, U and Th in mid-ocean ridge basalt glasses and heat production, K/U and K/Rb in the mantleNature, 1983
- Constraints on evolution of Earth's mantle from rare gas systematicsNature, 1983
- Terrestrial xenologyEarth and Planetary Science Letters, 1982
- Helium isotopic variations in the mantle beneath the central North Atlantic OceanEarth and Planetary Science Letters, 1982