Fig. 15
From: The Atlantis Bank Gabbro Massif, Southwest Indian Ridge
a–c Down-hole mineral composition plots for Hole 735B plagioclase anorthite content, augite Mg#, and olivine forsterite content modified from Dick et al. (2002) subdivided by major lithologic groups I to V defined by obvious breaks in the composition of the olivine gabbros. Points represent analytical averages for individual mineral grains. Heavy solid lines are inferred fractionation trends for the olivine gabbros. d Stratigraphic variation of average augite compositions in the Permian Panzhihua layered gabbro intrusion of SW China (Pang et al. 2009). Solid thin lines show the compositional range for each data point