Barbara E. John

TL;DR: In this article, trace element compositions for more than 300 zircon grains in 36 gabbros formed at the slow-spreading Mid-Atlantic and Southwest Indian Ridges were acquired.

TL;DR: Ocean Drilling Program Leg 176 deepened Hole 735B in gabbroic lower ocean crust by 1 km to 1.5 km as discussed by the authors, with evidence for two principal and many secondary intrusive events.

TL;DR: In this article, the trace element geochemical fingerprints used for lavas are applied with the same rational to zircon and new criteria for distinguishing mid-ocean ridge (MOR), magmatic arc, and ocean island (and other plume-influenced) settings are proposed.

TL;DR: In this paper, a revised model for oceanic core complex development based on consideration of the rheological differences between gabbro and serpentinized peridotite was proposed.

TL;DR: The textural and geochemical features of ocean crustal zircon recovered from plagiogranite, evolved gabbro, and metamorphosed ultramafic host-rocks collected along present-day slow and low spreading mid-ocean ridges (MORs) were characterized by sensitive high-resolution ion microprobe-reverse geometry at the USGS-Stanford Ion Microprobe facility as discussed by the authors.