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I use paleomagnetic and rock magnetic techniques to investigate a wide variety of geological problems, including distributed deformation at collisional plate boundaries (e.g. Hikurangi Margin, New Zealand), paleogeographic reconstructions (Neoproterozoic of Oman), and past behaviour of the Earth's magnetic field (Archean Pongola Supergroup, S Africa). My current work aims to use magnetic fabrics to measure paleostrain and map ancient deformation fields. I am particularly interested in interactions between the deep mantle and surface tectonics, such as how the migration and spreading behaviour of the East Pacific Rise seems to be linked to a long-lived upwelling from the core mantle boundary.
Scholarly, Creative & Professional Activities
Rowan, C.J., and Rowley, D.B., 2014. Spreading behaviour of the Pacific-Farallon ridge system since 83 Ma. Geophys. J. Int., Vol. 197, p1273-1283.
Roberts, A.P., et al., 2011. Magnetic properties of sedimentary greigite (Fe3S4): an update. Reviews of Geophysics, Vol. 49, RG1002.
Rowan, C.J. et al., 2009. Reductive diagenesis, magnetite dissolution, greigite growth and paleomagnetic smoothing in marine sediments: A new view. EPSL, Vol. 227, 223-235.
Chang, L. et al., 2009. Low-temperature magnetic properties of greigite (Fe3S4). Geochem. Geophys. Geosyst., Vol. 10, Q01Y04.
Rowan, C.J., and Roberts, A.P., 2008. Widespread remagnetizations and a new view of Neogene tectonic rotations within the Australia-Pacific plate boundary zone, New Zealand. JGR, Vol.113, B03103.
Chang, L., et al., 2007. Magnetic characteristics of synthetic pseudo-single-domain and multi-domain greigite (Fe3S4). GRL, Vol. 34, L24304.
Roberts, A.P., et al., 2007, High-resolution evidence for dynamic transitional geomagnetic field behaviour from a miocene reversal, McMurdo Sound, Ross Sea, Antarctica. Earth Planets Space, Vol. 59, p815-824.
Rowan, C.J., and Roberts, A.P., 2006. Magnetite dissolution, diachronous greigite formation, and hematite growth from pyrite oxidation: unravelling complex magnetizations in Neogene marine sediments from New Zealand. EPSL, Vol. 241, p119-137.
Roberts, A.P., et al., 2006. Characterization of hematite (alpha-Fe2O3), goethite (alpha-FeOOH), greigite (Fe3S4), and pyrrhotite (Fe7S8) using first-order reversal curve diagrams. JGR, Vol.111, B12S35.
- Global Tectonics
OFFICEDepartment of Geology
Spring 2015 office hours:
McGilvrey Hall 337
Monday 3:30 p.m. - 5:00 p.m.
Tuesday & Thursday
10:30 a.m. - 12:00 p.m.
or by appointment
CONTACT INFOPhone: 330-672-7428