Polymetamorphic garnet zoning from southeastern Vermont

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ID: 295854
1984
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Abstract
Textural unconformities involving garnet inclusion trails indicate garnet grew in two stages in an aluminous schist within the late Proterozoic to Cambrian Hoosac Formation on the east flank of the Green Mountains massif. Pervasive retrogression resulted in garnet zoning anomalies in an outer first stage garnet shell up to 0.5 mm thick. Normal growth zoning patterns resume in the second stage garnet rim. The zoning anomalies probably reflect diffusion within garnet during retrogressive alteration. The first prograde metamorphism is probably Ordovician, and the second Devonian. The retrogression and a period of thrust faulting are both approximately bracketed by two sets of folds, thus the retrogression may reflect thrusting of the rocks from garnet grade to colder temperatures, followed by later reburial and a second prograde metamorphism.\--Modified journal abstract.
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openalex_W2166168487 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Paul Karabinos
Journal american journal of science
Year 1984
DOI
10.2475/ajs.284.9.1008
URL
https://ajs.scholasticahq.com/article/60326.pdf
Keywords Keywords not found

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