HALVERSON, Galen Pippa
 |
Earth & Planetary Sciences galen.halverson@mcgill.ca |
Ph.D., Harvard University (2003)
Department of Earth and Planetary Sciences, McGill University
Hoffman, P.F., Halverson, G.P., Domack, E.W., Maloof, A.C., Swanson-Hysell, N.L., Cox, G.M. In Press. Cryugenian glaciations on the southern tropical paleomargin of Laurentia (NE Svalbard and East Greenland), and a primary origin for the upper Russoya (Islay) carbon isotope excursion. Precambrian Research, 206, 137-158. Caxito, F.D.A., Halverson, G.P., Uhlein, A., Stevenson, R., Gonçalves Dias, T., Uhlein, G.J. In Press. Marinoan glaciation in east Brazil. Precambrian Research, 200-203 (2) 38-58. Cox, G.M., Lewis, C.J., Collins, A.S., Halverson, G.P., Jourdan, F., Foden, J., Nettle, D., Kattan, F., 2012. Ediacaran terrane accretion within the Arabian-Nubian Shield, Gondwana Research, 21 (2-3), 341-352. Hall, P.A., McKirdy, D.M., Halverson, G.P., Jago, J.B., Gehling, J.G., 2011. Biomarker and isotopic signatures of an early Cambrian Lagerstätte in the Stansbury Basin, South Australia, Organic Geochemistry, 42(11), 1324-1330. Halverson, G.P., Poitrasson, F., Hoffman, P.F., Nédélec, A., Montel, J.-M., Kirby, J., 2011. Fe isotope and trace element geochemistry of the Neoproterozoic syn-glacial Rapitan iron formation, Earth and Planetary Science Letters, 309(1-2), 100-112. pdf McKirdy, D.M., Hall, P.A., Nedin, C., Halverson, G.P., Michaelsen, B.H., Jago, J.B., Gehling, J.G., Jenkins, R.J.F., 2011. Paleoredox status and thermal alteration of the lower Cambrian (Series 2) Emu Bay Shale Lagerstätte, South Australia, Australian Journal of Earth Sciences, 58(3), 259-272. pdf Publications Pré-GEOTOP Hoffman, P.F., Halverson, G.P., Accepted. Neoproterozoic glacial record in the Mackenzie Mountains, northwest Canadian Cordillera, Ibid. Haberlah, D., Williams, M.J., Halverson, G.P., Hill, S.M., Hrstka, T., Butcher, A.R., McTainsh, G.H., Glasby, P., 2010. Loess and floods: high-resolution multi-proxy data of Last Glacial Maximum (LGM) slackwater deposition in the Flinders Ranges, semi-arid South Australia, Quaternary Science Reviews, 29(19-20), 2673-2693. Steer, M.A., Halverson, G.P., Fowler, A.J., Gillanders, B.M., 2010. Stock discrimination of Southern Garfish (Hyporhamphus melanochir) by stable isotope ratio analysis of otolith aragonite, Environmental Biology of Fishes, 89(3), 369-381. Swanson-Hysell, N.L., Rose, C.V., Calmet, C., Halverson, G.P., Hurtgen, M.T., and Maloof, A.C., 2010. Cryogenian onset of a dynamic carbon cycle, Science, 328, 608-611, DOI: 10.1126/science.1184508. Halverson, G.P. and Shields, G., In press. Chemostratigraphy and the Neoproterozoic glaciations. In: Arnaud, E., Halverson, G.P. & Shields-Zhou, G.A. (Eds.) The Geological Record of Neoproterozoic glaciations. Geological Society of London. Halverson, G.P., In press. Glacial sediments and associated strata of the Polarisbreen Group, northeastern Svalbard. In E. Arnaud, G. Shields, and G.P. Halverson (Eds.), The Geological Record of Neoproterozoic Glaciations, Geological Society of London. Hoffman, P.F., and Halverson, G.P., In press. Neoproterozoic glacial record in the Mackenzie Mountains, northwest Canadian Cordillera. Ibid . Hoffman, P.F., Macdonald, F.A., and Halverson, G.P., In press. Chemical sediments associated with Neoproterozoic glaciations: Iron formation, cap carbonates, barite, and phosphorite. Ibid. Rice, A.H.N., Edwards, M.B., Hansen, T.A., Arnaud, E., and Halverson, G.P., In press. Glacigenic rocks of the Smalfjord and Mortensnes formations, Vestertana Group, E. Finnmark, Norway. Ibid. Stodt, F., Rice, A.H.N., Björklund, L., Bax, G., Halverson, G.P., Pharaoh, T.C., In press. Evidence of late Neoproterozoic glaciation in the Caledonides of NW Scandinavia, Ibid. Gaucher, C., Sial, A.N., Halverson, G.P., and Frimmel, H.E. (Eds.), 2009. Neoproterozoic-Cambrian Tectonics, Global Change and Evolution: A Focus on Southwestern Gondwana, Developments in Precambrian Geology, Vol. 16. Elsevier, 466 pp. Gaucher, C., Sial, A.N., Halverson, G.P., and Frimmel, H., 2009. The Neoproterozoic and Cambrian: A time of upheavals, extremes, and innovations. In: Gaucher, C., Sial, A.N., Halverson, G.P., and Frimmel, H.E. (Eds.), Neoproterozoic-Cambrian Tectonics, Global Change and Evolution: A Focus on Southwestern Gondwana. Developments in Precambrian Geology, Vol. 16. Elsevier pp. 3-11. Halverson, G.P., Hurtgen, M.T., Porter, S.M., and Collins, A.C., 2009. Neoproterozoic-Cambrian biogeochemical evolution, Ibid, pp. 351-365. Miller, R. McG., Frimmel, H., and Halverson, G.P., 2009. Neoproterozoic to Early Palaeozoic Evolution of Southwestern Africa: Passive Continental Margin Evolution, Ibid, pp. 161-181. Beyond this core research theme, my interests are varied and span the geological time scale. In collaboration with colleagues and students, I work on subjects ranging from Archean banded-iron formations (BIFs) to environmental signals preserved in bones and teeth. Cox, Grant: Ph.D. in Earth and Planetary sciences, McGill University Sujet de recherche: Geochemistry of the Neoproterozoic Mt Harper volcanics and the glaceogenic ironstone formations of the Canadian Cordilleran Codirection: Ross Stevenson, Département des sciences de la Terre et de l'atmosphère, UQAM Hubert-Theou, Lucie: Ph.D. in Earth and Planetary sciences, McGill University Sujet de recherche: Coupled climate-geochemical modelling of the connections between Rodinian breakup, flood basalt volcanism, and snowball glaciations Publications
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Rice, A.H.N., Edwards, M.B., Hansen, T.A., Arnaud, E., Halverson, G.P., Accepted. Glacigenic rocks of the Smalfjord and Mortensnes formations, Vestertana Group, E. Finnmark, Norway, Ibid.
Halverson, G.P., Wade, B.P., Hurtgen, M.T., Barovich, K.M., 2010. Neoproterozoic chemostratigraphy, Precambrian Research, 182(4), 337-350.
McKirdy, D.M., Thorpe, C.S , Haynes, D.E., Grice, K., Krull, E.S., Halverson, G.P., Webster, L.J., 2010. The biogeochemical evolution of the Coorong during the mid- to late Holocene: An elemental, isotopic and biomarker perspective. Organic Geochemistry, 41, 96-110.
Hoffman, P.F., Calver, C., Halverson, G.P., 2009. Cottons Breccia of King Island, Tasmania: glacial or non-glacial, Cryogenian or Ediacaran? Precambrian Research, 172, 311-322.
Le Hir, G., Donnadieu, Y., Goddéris, Y., Pierrehumbert, R.T., Halverson, G.P., Macouin, M, Néedélec, A., Ramstein, G., 2009. The snowball Earth aftermath: exploring the limits of continental weathering processes, Earth and Planetary Science Letters, 277, 453-463.
Domack, E.W., Halverson, G.P. Willmott, V., Leventer, A., Brachfield, S., Ishman, S., 2007. Spatial and temporal distribution of ikaite crystals in Antarctic glacial marine sediments, United States Geological Survey and The National Academies, USGS OF-2007-1047, Extended Abstract 015, 5p.
Halverson, G.P. Hurtgen, M.T., 2007. Ediacaran growth of the marine sulfate reservoir, Earth and Planetary Science Letters, 263, 32-44.
Halverson, G.P., Dudas, F., Maloof, A.C., Bowring, S.A, 2007. Evolution of the 87Sr/86Sr Composition of Neoproterozoic Seawater, Palaeogeography, Palaeoclimatology, Palaeoecology, 256, 103-129.
Halverson, G.P., Maloof, A.C. Schrag, D.P., Dudas, F., Hurtgen, M.T., 2007. Stratigraphy and geochemistry of a ca 800 Ma carbon isotope interval in northeastern Svalbard, Chemical Geology, 237, 23-45.
Hoffman, P.F., Halverson, G.P., Domack, E.W., Husson, J.M., Higgins, J.A., and Schrag, D.P., 2007. Are basal Ediacaran (635 Ma) post-glacial “cap-dolostones” diachronous? Earth and Planetary Science Letters, 258, 114-131.
Hurtgen, M.T., Halverson, G.P., Arthur, M., and Hoffman, P.F., 2006. Sulfur cycling in the aftermath of a Neoproterozoic (Marinoan) snowball glaciation: evidence for a syn-glacial, sulfidic deep ocean, Earth and Planetary Science Letters, 245, 551-570.
Maloof, A.C., Halverson, G.P., Kirschvink, J.L., Schrag, D.P., Weiss, Benjamin P., Hoffman, P.F., 2006. Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Geological Society of America Bulletin, 118, 1099-1124.
Published Books and Peer-Reviewed Book Chapters:
Hoffman, P.F. and Halverson, G.P., 2008. Otavi Group of the western Northern Platform, the Eastern Kaoko Zone and the western Northern Margin Zone. In: R. McG. Miller (Ed.), The Geology of Namibia, Vol. 2, Geological Survey of Namibia (Windhoek), pp. 69-136.
Halverson, G.P., 2006. A Neoproterozoic chronology. In S. Xiao, A.J. Kaufman (Eds.), Neoproterozoic Geobiology and Paleobiology, Topics in Geobiology, 27. Springer, pp. 231-271.Thèmes de recherche
I apply sedimentology, stratigraphy, and isotope geochemistry to reconstructing ancient environments within the context of secular and progressive tectonic, biospheric, and climatic evolution of the earth. Over the course of my research career, the underlying theme of my research has been to reconstruct paleoenvironmental change during the Neoproterozoic to early Phanerozoic (say, 1000 to 500 ma) and to understand the interconnections between tectonics (i.e. supercontinental break-up and assembly), seawater chemistry and ocean redox, severe climatic fluctuations (including snowball Earth), and the origin and diversification of animals. This research is fundamentally field-based and geared around detailed geological studies of sedimentary rocks that that archive clues as to how the Earth evolved during this time. In collaboration with diverse colleagues, I further interrogate the rock record with analytical tools, including radiogenic and stable isotope geochemistry, geochronology, paleontology, and paleomagnetics.
Étudiants
