Dr. McKenzie, Ryan

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Dr. McKenzie, Ryan

Assistant Professor

My research aims to develop a better understanding of the dynamic co-evolution of life and the Earth system through multifaceted studies generally focused on the sedimentary rock archive. My field-based research endeavors are supplemented with diverse analytical tools that include detrital sediment geochronology and geochemistry (e.g., detrital zircon analyses, trace elements, Nd, Li, and Sr isotopes), carbonate isotope geochemistry (e.g., C, O, S, Sr, and Nd), paleontology and biostratigraphy.  I am particularly interested in understanding how lithospheric processes influence climate, ocean–atmosphere chemistry, and biospheric evolution. This requires knowledge of both tectonic and geochemical processes at various spatial and temporal scales. My active research projects focus on (1) investigating tectonic and environmental influences on animal evolution and mass extinctions; (2) refining the stratigraphic architecture and Precambrian to recent tectonic history of the Indian subcontinent; (3) constraining the tectonic and sedimentary evolution of western Argentina; (4) Precambrian Earth system evolution with an emphasis on the Archean–Proterozoic and Neoproterozoic¬–Paleozoic transitions; and (5) broadly exploring tectonic influences on long-term carbon cycling and seawater chemistry. Current field sites include India, Argentina, China, South Korea, Canada, the western US, and Myanmar. 

PROSPECTIVE STUDENTS:
I study the geosciences because I thoroughly enjoy it and I am fortunate to make a living doing something I find fun and interesting. So if you are a student with broad interests in the Earth system and a general love for geology, please contact me! There are plenty of opportunities within my current projects, and I’m always keen to get involved in something new and exciting… 

Email: ryan00@hku.hk
Website http://web.hku.hk/~ryan00/
 

Teaching

EASC3403    Sedimentary environments / GEOS8215 Sedimentology
EASC3417    Earth Through Time
EASC4955    Integrated field studies
CCST9013    Our Living Environment

Selected Publications

  1. McKenzie, N.R., Horton, B.K., Loomis, S.E., Stockli, D.F., Planavsky, N.J., and Lee, C-T.A., 2016,  Continental arc volcanism as the principal driver of icehouse–greenhouse variability. Science. v. 352, p. 444-447.
  2. McKenzie, N.R., Hughes, N.C., Gill, B.J., and Myrow, P.M., 2014, Plate tectonic influences on Neoproterozoic-early Paleozoic climate and metazoan biodiversity. Geology. v. 42, p. 127-130.
  3. Lee, C-T.A., Yeung, L.A., McKenzie, N.R., Yokoyama, Y., Ozaki, K., and Lenardic, 2016, Two-step rise of atmospheric oxygen linked to the growth of continents. Nature Geoscience. v.9, no.6, p417-424.
  4. McKenzie, N.R., Hughes, N.C., Myrow, P.M., Xiao, S., and Sharma, M., 2011, Correlation of Precambrian-Cambrian sedimentary successions across northern India and the utility of isotopic signatures of Himalayan lithotectonic zones. Earth and Planetary Science Letters. v. 312 p.471-483.
  5. McKenzie, N.R., Hughes, N.C., Myrow, P.M., Choi, D.K., and Park, T.-y., 2011, Trilobites and zircons link North China to India in the Cambrian. Geology. v. 39, no. 6, p.591-594.