Chromite from the Blue Ridge Province of North Carolina

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ID: 298773
1984
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Abstract
Accessory chromite in dunite shows a variety of textures that indicate alteration. One group, type A, consists of four types of chromite: clean chromite; lattice chromite, in which the invading chlorite occurs along three directions in the (100) plane; optically zoned chromite; and poikiloblastic chromite. Most of type A chromites are surrounded by chromian clinochlore. The other group, type B, consists of euhedral to subhedral chromite grains which are included in olivine or pyroxene. The accessory chromites define a trend exhibited by chromite from other areas that have undergone metamorphism. Olivine-spinel geothermometry indicates equilibration temperatures near 700 degrees C, roughly consistent with mineral assemblages in the host gneisses. Thus, the Blue Ridge dunites are metamorphic rocks and not primary mantle peridotites.--Modified journal abstract.
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openalex_W2118004536 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Bruce R. Lipin
Journal american journal of science
Year 1984
DOI
10.2475/ajs.284.4-5.507
URL
https://doi.org/10.2475/ajs.284.4-5.507
Keywords Keywords not found

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