Microcracks and energy. Progress report, 1 March 1982-28 February 1983

Technical Report · Tue Mar 01 04:00:00 EST 1983

OSTI ID:6349092

Simmons, G

During the past 12 months, we worked mainly on the relation of microcracks to the transport of uranium and REEs. We have obtained polished thin sections of the samples of Conway and Mount Osceola granites from the Redstone Quarry (NH) and the Sherman granite from Wyoming. The location of U is determined from the induced fission tracks as photographed in a lexan detector through an optical microscope with transmitted light. The location of microcracks and their sealing minerals is determined with back-scattered electrons in the scanning electron microscopy (SEM). The two locations can be correlated now with an uncertainty of about 10 ..mu... The uncertainty in our previous work (which had been done on roughly polished surfaces) was about 75 ..mu... We have now documented spatial correspondence between the location of uranium and microcracks sealed with minerals containing REEs as well as other minerals. We have also examined the relation between uranium and tin mineralization in wall rock, Carnmenellis granite, from the Geevor Mine in Cornwall, England.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA). Dept. of Earth and Planetary Sciences
• DOE Contract Number: AC02-78ER04972
• OSTI ID: 6349092
• Report Number(s): DOE/ER/04972-4; ON: DE83008999
• Country of Publication: United States
• Language: English

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ACTINIDES
CRACKS
ELECTRON MICROSCOPY
ELEMENTS
ENVIRONMENTAL TRANSPORT
EUROPE
FEDERAL REGION I
FEDERAL REGION VIII
GRANITES
IGNEOUS ROCKS
MASS TRANSFER
METALS
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PARTICLE TRACKS
PLUTONIC ROCKS
RADIONUCLIDE MIGRATION
RARE EARTHS
RESEARCH PROGRAMS
ROCKS
SCANNING ELECTRON MICROSCOPY
UNITED KINGDOM
URANIUM
USA
WESTERN EUROPE
WYOMING