Leucoxene fish as a micro-kinematic indicator

Douglas H. Oliver, John W. Goodge

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Asymmetric aggregates of fine-grained leucoxene and quartz are reported from siliceous L-S tectonites deformed by progressive simple shear. The leucoxene fish, morphologically similar to mica fish, consistently yield shear senses in agreement with other kinematic criteria. We interpret the leucoxene as a pre-or early syntectonic alteration product of detrital heavy-minerals in a siliciclastic protolith. The leucoxene fish behave as passive markers, and they record kinematics by modification of pre-existing aggregates rather than syndeformational mineral growth. For siliceous metasedimentary rocks otherwise lacking in micro-kinematic indicators, leucoxene fish may provide an alternative to quartz c-axis analysis.

Original languageEnglish (US)
Pages (from-to)1493-1497
Number of pages5
JournalJournal of Structural Geology
Volume18
Issue number12
DOIs
StatePublished - Dec 1 1996

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