Aspects of the history of 66095 based on trace elements in clasts and whole rock
Halogens, P, U and Na are reported in anorthositic and basaltic clasts and matrix from rusty rock 66095. Large fractions of Cl and Br associated with the separated phases from 66095 are soluble in H/sub 2/O. Up to two orders of magnitude variation in concentrations of these elements in the breccia components and varying H/sub 2/O-soluble Cl/Br ratios indicate different sources of volatiles. An approximately constant ratio of the H/sub 2/O- to 0.1 M HNO/sub 3/-soluble Br in the various components suggests no appreciable alteration in the original distributions of this element in the breccia forming processes. Up to 50% or more of the phosphorus and of the non-H/sub 2/O-soluble Cl was dissolved from most of the breccia components by 0.1 M HNO/sub 3/. Clast and matrix residues from the leaching steps contain, in most cases, the Cl/P/sub 2/O/sub 5/ ratio found in 66095 whole rock and in a number of other Apollo 16 samples. Evidence that phosphates are the major P-phases in the brecia is based on the 0.1 M acid solubility of Cl and P in the matrix sample and on elemental concentrations which are consistent with those of KREEP.
- Research Organization:
- Argonne National Lab., IL
- OSTI ID:
- 6792806
- Journal Information:
- Geochim. Cosmochim. Acta, Suppl.; (United States), Vol. 12B; Conference: 12. lunar and planetary science conference, Houston, Texas, USA, 16 March 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ROCKS
CLASSIFICATION
GEOCHEMISTRY
LEACHING
ANORTHOSITES
APOLLO PROJECT
BASALT
CHEMICAL COMPOSITION
HALOGEN COMPOUNDS
LUNAR MATERIALS
PHOSPHORUS
SODIUM
URANIUM
ACTINIDES
ALKALI METALS
CHEMISTRY
DISSOLUTION
ELEMENTS
GABBROS
IGNEOUS ROCKS
MATERIALS
METALS
NONMETALS
PLUTONIC ROCKS
SEPARATION PROCESSES
VOLCANIC ROCKS
580300* - Mineralogy
Petrology
& Rock Mechanics- (-1989)