This readme.txt file was generated on 20220504 by John Goodge
Recommended citation for the data: 

Goodge, John W.; Fanning, C. Mark; Fisher, Chris M.; Vervoort, Jeff D.. (2022). Transantarctic Mountains granitoid isotopic data. Retrieved from the Data Repository for the University of Minnesota, https://doi.org/10.13020/stzs-xd13.


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GENERAL INFORMATION
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1. Transantarctic Mountains granitoid isotopic data 


2. Author Information


  Principal Investigator Contact Information
        Name:  John Goodge
           Institution: University of Minnesota Duluth
           Address: Department of Earth & Environmental Sciences
           Email: jgoodge@d.umn.edu
	   ORCID: 0000-0003-2578-3147

3. Date published or finalized for release: 20220505

4. Date of data collection: 2010-2019

5. Geographic location of data collection: Australian National University, Canberra, and Washington State University, Pullman.

6. Information about funding sources that supported the collection of the data: Data analysis for this project was supported by the Office of Polar Programs at the National Science Foundation (award 0944645). 

7. Overview of the data (abstract): We report U-Pb ages and O-Hf isotopic compositions in zircons from nearly 40 samples of Ross Orogen granitoids covering a large section of the modern Transantarctic Mountains in Antarctica. New age and isotopic analysis of zircons from this large suite of Ross granitoids spanning >2,000 km along the orogen provide a wealth of new geochronologic, tracer, and inheritance information, enabling us to investigate the pace of magmatism, along-strike temporal and geochemical trends, sources of melts, and tectonic mode of convergence during magmatism. Age and isotopic signatures were obtained by in situ analysis of the same zircon domains to first define ages by the U-Pb method, followed by O- and Hf-isotope analysis. U-Pb and O-isotope analysis were done by sensitive high-resolution ion microprobe (SHRIMP) at Australian National University, and precise Hf-isotope analysis was done using a laser ablation system coupled to a multi-collector inductively coupled plasma mass spectrometer (LA-MC-ICPMS) at Washington State University. 


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SHARING/ACCESS INFORMATION
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1. Licenses/restrictions placed on the data: 

CC0 1.0 Universal (https://creativecommons.org/publicdomain/zero/1.0/)

2. Links to publications that cite or use the data: N/A

3. Was data derived from another source? No
           If yes, list source(s):

4. Terms of Use: Data Repository for the U of Minnesota (DRUM) By using these files, users agree to the Terms of Use. https://conservancy.umn.edu/pages/drum/policies/#terms-of-use


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DATA & FILE OVERVIEW
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1. Types of tabulated information:  Tabulated data files include sample number and grain identifiers, measured spot ages, interpreted ages, elemental abundances, isotopic ratios and uncertainties, calculated ages, measures of age discordance, O-isotope compositions, and Hf-isotope compositions.


2. File List:
   A. Filename: SI zircon U-Pb age summary
      Short description:  A narrative summary of zircon U-Pb age results for each sample, describing zircon characteristics and age interpretations (PDF file format).

   B. Filename: SI Tables A1-A30 U-Pb sample data
      Short description:  Sample data sheets combining data Tables A1-A30 with graphical displays of Concordia diagrams and weighted-mean age plots for each sample (PDF file format).

   C. Filename: all U-Pb data tables.zip
      Short description:  Tabulated SHRIMP zircon U-Pb results for individual samples and divided into separate data tables A1-A30 (CSV file format as ZIP file).

   D. Filename: SI Table B1 all O isotope data
      Short description:  Tabulated SHRIMP zircon O-isotope data for individual samples (CSV file format).

   E. Filename: SI Table C1 all Hf isotope data
      Short description:  Tabulated LA-ICPMS zircon Hf-isotope data for individual samples (CSV file format).
        

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METHODOLOGICAL INFORMATION
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Methodologies are described in a manuscript submitted for publication. This includes methodological approach, instrumentation used, analysis conditions, standards, data reduction, and people involved with sample preparation and data collection.