Unit Affiliation: Geochemistry, Lamont-Doherty Earth Observatory (LDEO)
The team will detail major, minor, and trace-element geochemistry as well as Sr-Nd-Hf isotopic systematics to examine the serpentinite mélanges of the Guatemala Suture Zone to elucidate the record of mass transport by fluid recorded in the rocks.
OUTCOMES: The mélage underwent HP-LT metamorphism throughout most of the Cretaceous suggesting continuous subduction. Fluids hydrated most assemblages and generally show a sedimentary signature imposed on MORB trace element and isotopic pattern. Jadeitites and other vein assemblages crystallized out of trace element rich hydrothermal systems.
3He Measurements During the Southern Ocean Gas Exchange Project
A New Picomolar Interface for Compound Specific d13C and dD Measurements
Acquisition of a State-of-the-Art 40Ar/39Ar Geochronology System for the AGES Lab at Lamont-Doherty
Character, Timing and Origins of the Late Neoproterozoic Shuram-Wonoka Carbon Isotope Excursion and Associated Paleocanyons in South Australia