CHEM 1223A

rnicklas [at] umd [dot] edu

Igor Puchtel

Google Scholar ResearchGate

High-Temperature Geochemistry, Igneous Petrology, Komatiites and other high MgO rocks

I study isotope and trace metal distributions in komatiites, which are high melt fraction Precambrian volcanic rocks, in an effort to determine the oxidation state and composition of the deep Earth across geologic time.

Puchtel, I.S., Touboul, M., Blichert-Toft, J., Walker, R.J., Brandon, A.D., Nicklas, R.W., Kulikov, V.S. and Samsonov A.V. (2016) Lithophile and siderophile element systematics of Earth’s mantle at the Archean-Proterozoic boundary: Evidence from 2.4 Ga komatiites. Geochimica et Cosmochimica Acta. 180 227-255. DOI: 10.1016/j.gca.2016.02.027

Nicklas, R.W., Puchtel, I.S., Ash, R.D. (2016) High-precision determination of the oxidation state of komatiite lavas using vanadium liquid-mineral partitioning. Chemical Geology. 433 36-45. DOI: 10.1016/j.chemgeo.2016.04.011

Nicklas, R.W., Puchtel, I.S., Ash, R.D. (2018) Redox State of the Archean Mantle: Evidence from V partitioning in 3.5-2.4 Ga Komatiites. Geochimica et Cosmochimica Acta. 222 447-466. DOI: 10.1016/j.gca.2017.11.002

Nicklas, R. W., Puchtel, I.S., Ash, R. D., Piccoli, P. M., Hanski, E., Nisbet, E. G., Waterton, P., Pearson, D. G., Anbar, A. D. (2019) Secular mantle oxidation across the Archean-Proterozoic boundary: Evidence from V partitioning in komatiites and picrites. Geochimica et Cosmochimica Acta. 250 49-75. DOI: 10.1016/j.gca.2019.01.037

Qi, W., Wu, F., Ionov, D.A., Puchtel, I.S., Carlson, R.W., Nicklas, R.W., Yu, H., Kang, J., Li, C., Huang, F. (2019) Vanadium isotope composition of the Bulk Silicate Earth: Constraints from peridotites and komatiites. Geochimica et Cosmochimica Acta. 259 288-301. DOI: 10.1016/j.gca.2019.06.008