Metamorphosed ultramafic rocks in the Bronson Hill Anticlinorium, central Massachusetts

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ID: 305738
1984
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Abstract
Occurrence, mineralogy, bulk chemistry, and metamorphism of the ultramafic lenses in Middle Ordovician Partridge Formation. The lenses resemble boudins in which ultramafic rocks have been variably hybridized through reaction with schist or amphibolite country rock. The lenses are extraordinarily magnesian and may be the metamorphosed equivalents of ultramafic lava flows. Bulk chemistry indicates that they are not komatiitic and are unlikely to have resulted from hydrothermal seawater alteration of tholeiitic volcanics. The likeliest origin for the ultramafic lenses is as Middle Ordovician picritic lava flows that were probably not part of an ophiolite complex.--Modified journal abstract.
Reference Key
openalex_W2314655605 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Robert J. Tracy, Peter Robinson, R. A. Wolff
Journal american journal of science
Year 1984
DOI
10.2475/ajs.284.4-5.530
URL
https://doi.org/10.2475/ajs.284.4-5.530
Keywords Keywords not found

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