Figure F22. Photomicrographs depicting the variations in deformation of the oxide gabbronorites ranging from relatively undeformed to strongly deformed. A–C. This oxide gabbronorite has an undeformed igneous texture with lath-shaped euhedral plagioclase, subhedral to euhedral clinopyroxenes, subhedral orthopyroxene, and interstitial oxides (Sample 209-1270B-10M-1, 117–120 cm). (A) The red box indicates the position of the magnified image in B (field of view [FOV] = 11 mm; plane-polarized light: blue + dark gray filters; image 1270B_033). (B) Close-up of A showing that although the texture is magmatic the rock has experienced some deformation, as indicated by kinked plagioclase and release of strain associated with the polysynthetic twinning (cross-polarized light [XPL]: blue + dark gray filters; FOV = 2.75 mm; image 1270B_034). (C) Preservation of an optically zoned core (outlined in red) in a slightly deformed plagioclase (XPL: blue filter; FOV = 1.4 mm; image 1270B_013). D. Ribbon-textured plagioclase surrounded by plagioclase neoblasts in a strongly deformed oxide gabbronorite (Sample 209-1270B-1R-1, 90–93 cm) (XPL: blue filter; FOV = 2.75 mm; image 1270B

Figure F22. Photomicrographs depicting the variations in deformation of the oxide gabbronorites ranging from relatively undeformed to strongly deformed. A–C. This oxide gabbronorite has an undeformed igneous texture with lath-shaped euhedral plagioclase, subhedral to euhedral clinopyroxenes, subhedral orthopyroxene, and interstitial oxides (Sample 209-1270B-10M-1, 117–120 cm). (A) The red box indicates the position of the magnified image in B (field of view [FOV] = 11 mm; plane-polarized light: blue + dark gray filters; image 1270B_033). (B) Close-up of A showing that although the texture is magmatic the rock has experienced some deformation, as indicated by kinked plagioclase and release of strain associated with the polysynthetic twinning (cross-polarized light [XPL]: blue + dark gray filters; FOV = 2.75 mm; image 1270B_034). (C) Preservation of an optically zoned core (outlined in red) in a slightly deformed plagioclase (XPL: blue filter; FOV = 1.4 mm; image 1270B_013). D. Ribbon-textured plagioclase surrounded by plagioclase neoblasts in a strongly deformed oxide gabbronorite (Sample 209-1270B-1R-1, 90–93 cm) (XPL: blue filter; FOV = 2.75 mm; image 1270B_036). E, F. Wide view and detail of a stretched orthopyroxene grain (Sample 209-1270B-4M-1, 108–111 cm) (XPL: blue filter). (E) The stretched orthopyroxene grain is outlined in red. It sits in a matrix of plagioclase neoblasts and has neoblast of orthopyroxene in the middle of the grain where it has failed. The yellow box shows the location of a detailed view of the central boudinaged part of this grain (FOV = 11 mm; image 1270B_037). (F) Detail of a boudinaged orthopyroxene crystal with neoblasts of orthopyroxene and plagioclase (FOV = 2.75 mm; image 1270B_038).