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Gas Bench δ18O water method description for analyses done at UCSC SIL.Oxygen isotopic compostion of water was determined by equilibrium exchange of the water oxygen with 0.3% carbon dixoide gas in a predominantly helium headspace environment. A continuous He flow Gas Bench headspace sampling interface is used to dry and isolate the CO2 gas for introduction into a ThermoFinnigan Delta Plus XP isotope ratio mass spectrometer. Analyses were run at the University of California, Santa Cruz Stable Isotope Laboratory. Analytical precison of internationally calibrated in-house standards is better than 0.06 permil for d18O. Sample isotopic values are corrected for drift and source stretching effects. |
 NEWS & EVENTSUCSC's SIL retires its 15 year-old dual-inlet Optima following a very productive career that generated over 40,000 data points. Two Tsavo Lions In Famed Killings Get Partial Reprieve according to UCSC Graduate Student Justin Yeakel as inteviewed on NPR's All Things Considered. Listen here: SIL co-director Christina Ravelo (Ocean Sciences) sails as co-chief scientist on Integrated Ocean Drilling Project (IODP) Expedition 323 to investigate Bearing Sea Paleoceanography.
SIL co-director Christina Ravelo (Ocean Sciences) gives the 2008 Emiliani Lecture at the American Geophysical Union Meeting in San Francisco on "Lessons from the Pliocene Warm Period and the Onset of Northern Hemisphere Glaciation".
UCSC SIL has been funded by the National Science Foundation for a new Dual-Inlet Isotope Ratio Mass Spectrometer with individual acid drip system for very small calcium carbonate samples. SIL co-director Jim Zachos (Earth and Planetary Sciences) recieves prestigious Humbolt Research Award. See Humbolt Award for details. In recognition of the new continuous flow instruments added to the UCSC stable isotope facility a Symposium is being run to highlight the new analytical capabilities. |
