J. R. Weiss

Jet Propulsion Laboratory

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I. D. Hutcheon

Lawrence Livermore National Laboratory

E. L. Haines

California Institute of Technology

John Rooney

NOAA National Marine Fisheries Service Pacific Islands Fisheries Science Center

M. Sachpazi

National Observatory of Athens

D. A. Clague

Monterey Bay Aquarium Research Institute

A. Hirn

Institut de physique du globe de Paris

Mireille Laigle

Observatoire de la Côte d’Azur

A. M. Goodliffe

Geological Survey of Alabama

Brian Taylor

University of Hawaiʻi at Mānoa

Mark Joseph Kalahari Edwards

Nelson Mandela University

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University of Hawaii System

University of Hawaiʻi at Mānoa

Centre National de la Recherche Scientifique

Institut de physique du globe de Paris

Université Paris Cité

Sorbonne Paris Cité

California Institute of Technology

University of California, Berkeley

NOAA National Marine Fisheries Service Pacific Islands Fisheries Science Center

Office of Ocean Exploration and Research

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Shallow terraces in the Northwestern Hawaiian Islands: Implications for carbonate accretion and sea level variations

AGUFM (2009)

J. R. Weiss Mark Joseph Kalahari Edwards Charles H. Fletcher John Rooney D. A. Clague

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The fission track record of Apennine Front KREEP basalts.

Lunar and Planetary Science Conference Proceedings (1975)

E. L. Haines I. D. Hutcheon J. R. Weiss

Whitlockite grains in two Apennine Front KREEP soil fragments contain extremely high densities of fission tracks. A new method is described in which particle tracks are examined in an actinide-poor phase bordering an actinide-rich whitlockite phase. This method clearly distinguishes the fission track contributions from other track sources; e.g., Fe-group cosmic rays, spallation recoils, and dislocations. Observed track excesses, when corrected for U- and Th-related fission sources, are 4-20 times greater than the contribution from spontaneous fission of U-238 (based on an age of 4 b.y.), and probably represent a large and variable contribution from the fission of Pu-244. These fragments may have pre-Imbrium ages, underscoring the importance of KREEP as a constituent of the pre-mare lunar crust. Track excesses are not correlated with the U or Th contents of the whitlockite grains. This behavior suggests that Pu fractionates differently from U and Th in lunar igneous KREEP.

Whitlockite

Fission track dating

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Citations (1)

The fission track record of Apennine Front KREEP basalts

Pages (1975)

E. L. Haines I. D. Hutcheon J. R. Weiss

Whitlockite

Fission track dating

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