Barnhart, K., Mahan, K., Blackburn, T., Bowring, S., Dudas, F. 2020. Mineral compositions for metamorphosed lower crustal xenoliths, central Montana, USA, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA). https://doi.org/10.1594/IEDA/111447.
Mineral compositions for metamorphosed lower crustal xenoliths, central Montana, USA
These data are mineral compositions measured by electron microprobe, presented in the 2012 publication in Geosphere by Barnhart et al. The samples are from the Robinson Ranch and Litte Sand Creek xenolith localities in central Montana, hosted by Eocene volcanics. The mineral chemistry was analyzed as part of an effort to help constrain the age, thermal evolution, metamorphic history, and physical properties (e.g., seismic velocities) of Montana deep crust. Geochronology data for some of these samples are also presented in the Barnhart publication. Two other related publications with similar data for additional Montana samples are a 2011 Contributions to Mineralogy and Petrology paper by Blackburn et al. and a 2012 Geochemistry, Geophysics, and Geosystems paper by Mahan et al.
Coverage Scope: Other
Geographic Location: Montana, North America, United States of America, Robinson Ranch, Little Sand Creek
Katherine R. Barnhart, Kevin H. Mahan, Terrence J. Blackburn, Samuel A. Bowring, and Francis O. Dudas, (2012), "Deep crustal xenoliths from central Montana, USA: Implications for the timing and mechanisms of high-velocity lower crust formation." Geosphere, 8(6): 1408-1428
User Contributed Keyword(s):
Montana, xenoliths, North America, upper crust, crust
National Science Foundation: 1252295
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