Published January 19, 1989
| Version v1
Journal article
Origin of the anomalous 40Ar-39Ar age of Zaire cubic diamonds: excess 40Ar in pristine mantle fluids
Creators
- 1. Tokyo Univ. (Japan). Geophysics Inst.
- 2. Sheffield Univ. (UK). Dept. of Physics
Description
Cubic diamonds from Zaire show excellent correlations between potassium content and 40Ar/36Ar ratio, and between 40Ar/36Ar and 39Ar/36Ar, which can be interpreted to yield an 'isochron' age of about 6 Gyr. Now the discovery of a correlation between chlorine content and 40Ar, together with recent mineralogical and geochemical work concerning the origin of cubic diamonds, strongly suggests that the 40Ar is an excess component which has no age significance, and that the 40Ar and its associated potassium are contained in sub-micrometre inclusions of mantle-derived fluid. (author)
Additional details
Publishing Information
- Journal Title
- Nature (London)
- Journal Volume
- 337
- Journal Issue
- 6204
- Series
- Nature (London).
- Journal Page Range
- 226-229
- ISSN
- 0028-0836
- CODEN
- NATUA
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 20032388
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- AGE ESTIMATION; ARGON ISOTOPES; ARGON 36; ARGON 39; ARGON 40; CHLORINE; CORRELATIONS; DEGASSING; DIAMONDS; EARTH MANTLE; ELEMENT ABUNDANCE; EXPERIMENTAL DATA; ISOTOPE RATIO; POTASSIUM; ZAIRE REPUBLIC
- Descriptors DEC
- AFRICA; ALKALI METALS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBON; DATA; DEVELOPING COUNTRIES; ELEMENTS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HALOGENS; INFORMATION; ISOTOPES; LIGHT NUCLEI; METALS; MINERALS; NONMETALS; NUCLEI; NUMERICAL DATA; QUANTITY RATIO; RADIOISOTOPES; STABLE ISOTOPES; YEARS LIVING RADIOISOTOPES