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Chemical Migration by Contact Metamorphism between Pegmatite and Country Rocks: Natural Analogs for Radionuclide Migration

Published online by Cambridge University Press:  25 February 2011

J. C. Laul ,
R. J. Walker ,
C. K. Shearer ,
J. J. Papike  and
S. B. Simon
J. C. Laul
Affiliation:
Radiological Sciences DepartmentPacific Northwest LaboratoryRichland, Washington 99352
R. J. Walker
Affiliation:
Department of Earth and Space SciencesState University of New York, Stonybrook, New York 11794
C. K. Shearer
Affiliation:
Institute of Mineral DepositsSouth Dakota School of Mines, Rapid City, South Dakota 57701
J. J. Papike
Affiliation:
Institute of Mineral DepositsSouth Dakota School of Mines, Rapid City, South Dakota 57701
S. B. Simon
Affiliation:
Institute of Mineral DepositsSouth Dakota School of Mines, Rapid City, South Dakota 57701
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Abstract

Comparison of trace element signatures of country rocks as a function of distance from the contact with two pegmatites, Tin Mountain and Etta, in the Black Hills of South Dakota, suggests that some elements such as K, Li, Rb, Cs, As, Sb, Zn and Pb, have migrated to distances of 4 to 40 meters during contact metamorphism. The relative degree of migration varies depending on the element. On the other hand, there is virtually no migration of rare earth elements (REE), Al, Sc, Cr, Hf, U, and Th. Biotite and muscovite are effective trace element traps for Li, Rb and Cs. Biotite has a greater affinity for Rb, Cs and Li than muscovite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 26: Symposium D – Scientific Basis for Nuclear Waste Management VII , 1983 , 951
Copyright
Copyright © Materials Research Society 1984

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References

REFERENCES

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