Role of ductile shearing in the concentration of radon in the Brookneal zone, Virginia

A. E. Gates, L. C.S. Gundersen

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A positive correlation exists among surface gamma radiation, uranium concentration, and the angles between C and S bands in mylonite and radon in the soils overlying the Brookneal zone of the southwest Virginia Piedmont. Part of the Brookneal zone lies within the compositionally homogeneous Melrose granite, which is undeformed to the west of the zone. Radon in the overlying soils increased from 450 picocuries/litre (pCi/L) is undeformed granite to as much as 4100 pCi/L in ultramylonite. In undeformed granite, uranium is hosted in titanite and zircon. During mylonitization, uranium was redistributed into the foliation and is associated with hematite and fine-grained monazite. -from Authors

Original languageEnglish (US)
Pages (from-to)391-394
Number of pages4
JournalGeology
Volume17
Issue number5
DOIs
StatePublished - 1989

All Science Journal Classification (ASJC) codes

  • Geology

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