Lu–Hf total-rock isochron for the eucrite meteorites

@article{Patchett1980LuHfTI,
  title={Lu–Hf total-rock isochron for the eucrite meteorites},
  author={P. Jonathan Patchett and Mitsunobu. Tatsumoto},
  journal={Nature},
  year={1980},
  volume={288},
  pages={571-574}
}
The isotope 176Lu (2.6% of natural lutetium) decays by β− to 176Hf, with a long half life. We present here the first Lu–Hf isochron. The eucrite meteorites, a suite of planetary igneous rocks of known age, 4,550 Myr, define a 10-point total-rock isochron with a slope of 0.0934 ± 40, leading to a value of 3.53 ± 0.14 ×1010yr for the β−-decay half life of 176Lu. The isochron intercept of 0.27973 ± 12 gives the initial 176Hf/177Hf for the inner Solar System at the time of accretion. 

Meteorite Phosphates Show Constant 176Lu Decay Rate Since 4557 Million Years Ago

New highly radiogenic Lu-Hf data for phosphate minerals from Richardton and Acapulco yield decay constant values identical to the value determined from terrestrial minerals, confirming the use of radioactive decay to study the evolution of the Earth.

Early history of Earth's crust–mantle system inferred from hafnium isotopes in chondrites

This λ176Lu value indicates that Earth's oldest minerals were derived from melts of a mantle source with a time-integrated history of depletion rather than enrichment, consistent with timing inferred from extinct radionuclides.

Meteorites ( Lu – Hf )

The 176-Lutetium-176-Hafnium radiogenic isotopic system (Lu half-life ~37 Ga) is a powerful chronometer and tracer of geochemical processes and planetary evolution. It was formerly assumed that the

THE LU ISOTOPIC COMPOSITION OF ACHONDRITES: CLOSING THE CASE FOR ACCELERATED DECAY OF 176LU

Studies of Lu–Hf isotope systematics in meteorites have produced apparent “ages” that are older than Pb–Pb ages and older than the estimated age of our solar system. One proposed explanation for this

Low-Temperature Thermochronometry of Meteorites

Timing of accretion of the primary planetesimals in the early solar system has been investigated using short-lived (e.g., 26Al, 53Mn, 182Hf and 129I) and long-lived (e.g., 238U, 235U, 232Th and

Precise determination of the lutetium isotopic composition in rocks and minerals using multicollector ICPMS.

A new analytical technique is presented designed to measure the (176)Lu/(175)Lu isotope ratio in rock samples to a precision of ~0.1‰ using a multicollector inductively coupled mass spectrometer (MC-ICPMS), and proposes the use of NIST3130a as a bracketing standard in future studies.
...

References

SHOWING 1-10 OF 14 REFERENCES

Geochronology: Recent Development in the Lutetium-176/Hafnium-176 Dating Method

The geological redetermination of the half-life of lutetium-176 (3.3 � 0.5 x 1010 years) is in agreement with recent physical measurements.

Principles of isotope geology

  • G. Faure
  • Geology, Environmental Science
  • 1977
The Roots of Isotope Geology. The Internal Structure of Atoms. Decay Mechanisms of Radioactive Atoms. Radioactive Decay and Growth. Mass Spectrometry. The K-Ar Method of Dating. The 40 Ar/39 Ar

LXXV. The natural radioactivity of lutetium

Abstract The radiations from the decay of naturally occurring 178Lu are studied in detail. The β --spectrum, which was found to be of allowed shape, was investigated using internally mounted sources