Fractionation factors for selected mineral samples

Isotope ratio mass spectrometer oxygen isotopic data must have the appropriate mineral/temperature fractionation correction applied.

References:

McCrea, J. M., On the Isotopic Chemistry of Carbonates and a Paleotemperature Scale, J. Chem. Phys. 18, 849 (1950); doi:10.1063/1.1747785

Friedman, I. & O'Neil, J.R ., (1977). Compilation of stable isotope fractionation factors of geochemical interest. In: Data of Geochemistry. U.S. Geol. Surv., Prof. Pap., 440-KK, 6th ed.

Perry, E.C. & Tan, F.C., (1972). Significance of oxygen and carbon isotope variations in early Precambrian cherts and carbonate rocks of southern Africa. Geol. Soc. Am. Bull., vol. 83, pp. 647-664.

Rosenbaum, J., & Sheppard, S.M., (1986). An isotopic study of siderites, dolomites and ankerites at high temperatures. Geochim. Cosmochim. Acta, vol. 50, pp. 1147-1150.

Sharma, T., & Clayton, R.N., (1965). Measurement of 18O/16O ratios of total oxygen of carbonates. Geochim. Cosmochim. Acta, vol. 29, pp. 1347-1353.

Swart, P.K., Burns, B.J. & Leder, J.J., (1991). Fractionation of the stable isotopes of oxygen and carbon in carbon dioxide during the reaction of calcite with phosphoric acid as a function of temperature and technique. Chemical Geology (Isotope Geoscience Section), vol. 86, pp. 89-96.

NEWS & EVENTS

November 2009

UCSC's SIL retires its 15 year-old dual-inlet Optima following a very productive career that generated over 40,000 data points.

November 2009

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:

July-August 2009

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.

December 2008

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".

September 2008:

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.

July 2008:

SIL co-director Jim Zachos (Earth and Planetary Sciences) recieves prestigious Humbolt Research Award. See Humbolt Award for details.

May 19, 2006: UCSC Stable Isotope Laboratory Symposium

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.