IEDA
Project Information
Collaborative research: Polyphase Orogenesis and Crustal Differentiation in West Antarctica
Short Title:
Transformation of continental crust in Marie Byrd Land
Start Date:
2011-10-20
End Date:
2013-12-26
Description/Abstract
Intellectual Merit:
The northern Ford ranges in Marie Byrd Land, Antarctica, record events and processes that transformed a voluminous succession of Lower Paleozoic turbidites intruded by calc-alkaline plutonic rocks into differentiated continental crust along the margin of Gondwana. In this study the Fosdick migmatite?granite complex will be used to investigate crustal evolution through an integrated program of fieldwork, structural geology, petrology, mineral equilibria modeling, geochronology and geochemistry. The PIs propose detailed traverses at four sites within the complex to investigate Paleozoic and Mesozoic orogenic cycles. They will use petrological associations, structural geometry, and microstructures of host gneisses and leucogranites to distinguish the migration and coalescence patterns for remnant melt flow networks, and carry out detailed sampling for geochronology, geochemistry and isotope research. Mafic plutonic phases will be sampled to acquire information about mantle contributions at the source. Mineral equilibria modeling of source rocks and granite products, combined with in situ mineral dating, will be employed to resolve the P?T?t trajectories arising from thickening/thinning of crust during orogenic cycles and to investigate melting and melt loss history.

Broader impacts:
This work involves research and educational initiatives for an early career female scientist, as well as Ph.D. and undergraduate students. Educational programs for high school audiences and undergraduate courses on interdisciplinary Antarctic science will be developed.
Personnel
Person Role
Siddoway, Christine Investigator
Brown, Mike Co-Investigator
Funding
Antarctic Earth Sciences Award # 0944615
Antarctic Earth Sciences Award # 0944600
Deployment
Deployment Type
Ford Ranges crustal differentiation field camp
Data Management Plan
None in the Database
Product Level:
NA
Datasets
Repository Title (link) Format(s) Status
Polar Rock Repository Rock Samples collected from bedrock exposures, Ford Ranges, MBL None exists
Publications
  1. Yakymchuk, C.; Brown, M., Korhonen, F., Piccoli, P., Siddoway, C., and Vervoort, J.D., 2014, Decoding polyphase migmatites using geochronology and phase equilibria modeling, Journal of Metamorphic Geology, v. 33 (2), p. 203–230 (doi:10.1111/jmg.12117)
  2. Saito, S., Brown, M., Korhonen, F.J., McFadden, R.R., and Siddoway, C.S., 2012, Evidence for melting of metasomatised sub-continental arc mantle beneath the mid-Cretaceous proto-Pacific Gondwana margin from mafic intrusive rocks in the Fosdick Mountains, West Antarctica, Gondwana Research, v. 23 (4), p. 1567–1580 (doi:10.1016/j.gr.2012.08.002)
  3. Yakymchuk, C., Brown, C.R., Brown, M., Siddoway, C.S., Fanning, C.M. and Korhonen, F.J., 2015, Paleozoic evolution of West Marie Byrd Land, West Antarctica: Geological Society of America Bulletin (doi:10.1130/B31136.1)
  4. Brown, C., Yakymchuk, C., Brown, M., Fanning, C.M. Korhonen, F.J., and Siddoway, C.S., 2016, From source to sink: Petrogenesis of Cretaceous anatectic granites from the Fosdick migmatite–granite complex, West Antarctica, Journal of Petrology (doi:10.1093/petrology/egw039)
  5. Yakymchuk, C., Siddoway, C.S., Brown, M., and Fanning, C.M., 2013, Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica, in Harley et al. (eds.), Antarctica and Supercontinent Evolution, Geological Society of London Special Publication 383 (doi:10.1144/SP383.7)
  6. Korhonen, F.J., Brown, M., Grove, M., Siddoway, C.S., Baxter, E.F., and Inglis, J.D., 2011, Separating polymetamorphic events in the Fosdick migmatite–granite complex, West Antarctica, J. Metamorphic Geology, v. 30, p. 165-191 (doi:10.1111/j.1525-1314.2011.00961.x)
  7. Korhonen, F.J., S. Saito, M. Brown, C.S. Siddoway, and Day, J., 2010, Multiple generations of granite in the Fosdick Mountains, Marie Byrd Land, West Antarctica: Implications for polyphase intracrustal differentiation in a continental margin setting, Journal of Petrology, 51 (3) 627-670 (doi:10.1093/petrology/egp093)
  8. Korhonen, F.J., S. Saito, M. Brown, and C.S. Siddoway, 2010, Modeling multiple melt loss events in the evolution of an active continental margin, Lithos (doi:10.1016/j.lithos.2009.09.004)

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