Previous   |    Close   |    Next

Figure F129. A. Gabbro cut by parallel set of dark green amphibole veins (interval 305-U1309D-160R-4, 0–23 cm). The density of such sets locally approaches that of a foliation. Note development of corona texture in the alteration halo of these veins. B. Dark green fibrous amphibole veins (Sample 305-U1309D-145R-1, 62–64 cm) (plane-polarized light; magnification = 2.5×). Note alteration of proximal clinopyroxene to amphibole very similar to that in the veins. Also note pervasive veining of nearby plagioclase (Pl).

Previous   |    Close   |    Next   |    Top of page