Petrological insights of abyssal peridotite from ODP Leg 209 MAR Peridotite

Abstract

ODP Leg 209 was performed from May to July, 2003 to drill mantle peridotites and associated gabbroic rocks (at 8 Sites, 19 holes) along the Mid- Atlantic Ridge (MAR) from 14-16 N, both sides of 15 20'N FZ. In this area, a series of outcrops of residual mantle peridotite on both sides of the rift valley. Site 1268, 1270, 1271 ans 1272 yielded substantial proportions of gabbroic rocks intrusive into mantle peridotite (25% of gabbros and 75% of mantle peridotite). Abundant of gabbro and dunite were recovered from this area suggest that main volume of melt body were consumed in the upper mantle by melt-wallrock interaction.