Dr. Karen Ziegler

Senior Research Scientist III

Institute of Meteoritics

MSC03 2050

1 University of New Mexico

Albuquerque, NM 87131-0001

Phone: 505-920-6640

Fax: 505-277-3577

Email: kziegler@unm.edu

Ph. D. Geochemistry, Postgraduate Research Institute for Sedimentology (PRIS), University of Reading/UK, 1993

M. Sc. Geology, Technische Universität Clausthal, Clausthal-Zellerfeld/Germany, 1989

B. Sc. Geology, Bayrische Julius-Maximilians-Universität, Würzburg/Germany, 1985

Research interests

Stable isotope planetary- and cosmochemistry applied to meteoritics, early Solar System evolution, planetary accretion and differentiation, and Earth's core formation (in particular O and Si stable isotopes).

Novel isotope systems and analytical techniques - to understand in more details the processes controlling distribution and cycling of elements in planets.

Stable isotope geochemistry (e.g., O, H, Si) applied to the broad spectrum of rock-alteration processes (water-rock-interactions) at Earth’s and other planets' surface and subsurface to understand underlying physicochemical and possibly biological processes.

Using stable isotopes as qualitative and quantitative tools for deciphering interactions at the litho-/hydro-/bio- and atmosphere interfaces.

Silicon isotope geochemistry: low- and high-temperature experimental and empirical determination of isotope fractionations during inorganic and biological processes.

Here is a copy of my CV

Selected Publications

Ziegler, K., Young, E.D., Schauble, E.A. & Wasson, J. T. (2010): Metal–silicate silicon isotope fractionation in enstatite meteorites and constraints on Earth's core formation. Earth and Planetary Science Letters 295, pp 487-496. link to article

Bern, C.R., Brzezinski, M.A., Beucher, C, Ziegler, K. & Chadwick, O.A. (2010): Weathering, dust, and biocycling effects on soil silicon isotope ratios. Geochimica et Cosmochimica Acta 74, pp 876-889. link to article

Shahar, A., Ziegler, K., Young, E.D., Ricolleau, A., Schauble, E.A. & Fei, Y. (2009): Experimentally determined Si isotope fractionation between silicate and Fe metal and implications for Earth’s core formation. Earth and Planetary Science Letters, 288, pp 228-234. link to article

Rubin, A.E., Ziegler, K., & Young, E.D. (2008): Size scales over which ordinary chondrites and their parent asteroids are homogeneous in oxidation state and oxygen-isotopic composition. Geochimica et Cosmochimica Acta 72, pp 948-958. link to article

Kouchinsky, A., Bengtson, S., Gallet, G., Korovnikov, I., Pavlov, V., Runnegar, B., Shields, G., Veizer, J., Young, E.D. & Ziegler, K. (2008): The SPICE carbon isotope excursion in Siberia: a combined study of the upper Middle Cambrian-lowermost Ordovician Kulyumbe River section, northwestern Siberian Platform. Geological Magazine 145, pp 609-622. link to article

Ziegler, K. (2006): Clay minerals of the Permian Rotliegend Group in the North Sea and adjacent areas. – In: Jeans, C.V. & Merriman, R.J. (editors) Clay Minerals in onshore and offshore Strata of the British Isles: Origins & Clay Minerals Stratigraphy. Min. Soc. Great Britain and Ireland, pp 355-393. link to article

Brownlee, D. and 174 co-authors of the STARDUST Preliminary Examination Team, including Ziegler, K. (2006): Comet Wild 81P/2 under a microscope. Science 314, pp 1711-1716. link to article

Ziegler, K., Chadwick, O.A., Kelly, E.F. & Brzezinski, M.A. (2005): Natural Variations of δ30Si Ratios During Progressive Basalt Weathering, Hawaiian Islands. Geochimica et Cosmochimica Acta 69, pp 4597-4610. link to article

Derry, L.A., Kurtz, A.C., Ziegler, K. & Chadwick, O.A. (2005): Biological control of terrestrial silica cycling and export fluxes to watersheds. Nature 433, 728-731. link to article

Ziegler, K., Chadwick, O.A., White, A.F. & Brzezinski, M.A. (2005): δ30Si systematics in a granitic saprolite, Puerto Rico. Geology 33, pp 817-820. link to article

Ziegler, K., Hsieh, J.C.C., Chadwick, O.A., Kelly, E.F.& Savin, S.M. (2003): Halloysite as a kinetically controlled end product of arid-zone basalt weathering. Chemical Geology 202, pp 461-478. link to article