VGP33A:
Origin of Cratonic Mantle Lithosphere, Diamonds, and Deeply Sourced Volatile-Rich Melts: Processes and Timescales I

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Session ID#: 6825

Session Description:
Canada has emerged as the third largest diamond producer over the past 15 years, and this development spawned a new era of studies on the formation of cratonic lithosphere, kimberlitic magmatism, and diamonds within the international geosciences community. In parallel, significant advancements of research methods have been instrumental for an improved understanding of processes and timescales of craton stabilization and modification, including conditions that trigger diamond formation and kimberlite eruptions. The now available information about the deep mantle roots of ancient continental nuclei, including the Canadian Shield, enables us to challenge and further develop concepts of craton geology.

We welcome contributions that investigate deep continental lithosphere through mantle-derived xenolith and diamond studies, as well as by geophysical means. We invite studies pertinent to the formation and evolution of volatile-rich magmas such as kimberlites and carbonatites, including their potential to modify cratonic mantle. Studies advancing diamond exploration techniques are also welcome.

OSPA Liaison:  Yana Fedortchouk, Dalhousie University, Department of Earth Sciences, Halifax, NS, Canada
Chairs:  Sebastian Tappe, University of the Witwatersrand, School of Geosciences, Johannesburg, South Africa, Yana Fedortchouk, Dalhousie University, Department of Earth Sciences, Halifax, NS, Canada and Antonio Simonetti, University of Notre Dame, Notre Dame, IN, United States
Primary Convener:  Sebastian Tappe, De Beers Group Exploration, Johannesburg, South Africa
Conveners:  Yana Fedortchouk, Dalhousie University, Halifax, NS, Canada and Antonio Simonetti, University of Notre Dame, Notre Dame, IN, United States
Index Terms:

1025 Composition of the mantle [GEOCHEMISTRY]
1037 Magma genesis and partial melting [GEOCHEMISTRY]
1038 Mantle processes [GEOCHEMISTRY]
1040 Radiogenic isotope geochemistry [GEOCHEMISTRY]
Co-Sponsor(s):
  • MD - Mineral Deposits and Ore Minerals
  • PG - Precambrian Geology
  • SE - Solid Earth
  • T - Tectonophysics

Abstracts Submitted to this Session:

VGP33A-01
New insights from modeling and geophysical observations of cratonic mantle keels (Invited) (34514)
David W S Eaton, University of Calgary, Department of Earth, Energy, and Environment, Calgary, AB, Canada and Tannistha Maiti, University of Calgary, Calgary, AB, Canada
VGP33A-02
Building Archean cratons from Hadean crust (Invited) (35792)
Jonathan O'Neil, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada and Richard W Carlson, Carnegie Institution for Science, DTM, Washington, DC, United States
VGP33A-03
On the Archean vs. Proterozoic age of the HIMU mantle component : New 33S/32S, 34S/32S, 36S/32S-data from Saint-Helena glasses. (34942)
Pierre Cartigny1, Jabrane Labidi2, Colin William Devey3, Matthew G Jackson4, Emilie Thomassot5 and Etienne Deloule5, (1)Institut de Physique du Globe de Paris, Paris, France, (2)Carnegie Institution for Science Washington, Washington, DC, United States, (3)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (4)University of California, Earth Science, Santa Barbara, CA, United States, (5)CRPG-Nancy, Vandoeuvre-Les-Nancy, France
VGP33A-04
Mineralogical Controls on Garnet Composition in the Cratonic Mantle (Invited) (35154)
Maya G Kopylova1, Patrick James Albert Hill1, Kelly Russell2 and Harrison Cookenboo3, (1)University of British Columbia, Vancouver, BC, Canada, (2)University of British Columbia, Earth, Ocean, and Atmospheric Sciences, Vancouver, BC, Canada, (3)Watts, Griffis and McQuat Consulting Geologists and Engineers, Vancouver, BC, Canada
VGP33A-05
The Dissolution of Orthopyroxene in Potential Proto-kimberlitic Melts between 2.5 and 6.0 GPa (33446)
Rebecca Susan Stone and Robert W Luth, University of Alberta, Earth and Atmospheric Sciences, Edmonton, AB, Canada
VGP34C-0423
Diamond Resorption Morphology and Applications: a Review (34918)
Yana Fedortchouk, Dalhousie University, Department of Earth Sciences, Halifax, NS, Canada
VGP33A-07
Volatile composition during kimberlite emplacement and mantle metasomatism: constrains from diamond resorption morphology (35301)
Zhihai Zhang1, Yana Fedortchouk1 and Jacob J Hanley2, (1)Dalhousie University, Department of Earth Sciences, Halifax, NS, Canada, (2)Saint Mary's University, Halifax, NS, Canada
VGP33A-08
Exploring Relationships between Kimberlite Distributions, Mantle Dynamics, and the Hypsometric History of the North American Cratonic Interior (Invited) (35028)
Rebecca Marie Flowers, University of Colorado, Boulder, Geological Sciences, Boulder, United States, Alexis K Ault, Utah State University, Department of Geosciences, Logan, UT, United States, Shijie Zhong, University of Colorado at Boulder, Department of Physics, Boulder, United States and Samuel A Bowring, Massachusetts Institute of Technology, Cambridge, MA, United States
See more of: Volcanology, Geochemistry, and Petrology