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Isotopically anomalous 196 Hg and 202 Hg in Antarctic achondrites
Author(s) -
Jovanovic S.,
Reed G. W.
Publication year - 1987
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl014i011p01127
Subject(s) - achondrite , meteorite , geology , basalt , isotope , geochemistry , neutron activation analysis , mineralogy , astrobiology , radiochemistry , chondrite , chemistry , physics , quantum mechanics
Antarctic shergottite EETA 79001 and polymict eucrite ALHA 78132 contain Hg which is anomalous in the 196 Hg or 202 Hg isotope. The anomalous fractions were extracted at 130°C during stepwise heating of neutron irradiated samples. The 196/202 Hg ratios differ by factors of 2‐4 from the normal Hg ratio. This is an enormous effect. Approximately fifty other Hg fractions extracted at temperatures up to 1200°C from these and several other Antarctic basaltic achondrites and from the non‐Antarctic fall, Shergotty, gave 196/202 Hg ratios within 20% of normal.