Annotated Exercises For Looking at the Volcanology and Petrology
of the Springerville Volcanic Field, East-Central Arizona

Chris Condit ccondit@geo.umass.edu
Department of Geosciences, University of Massachusetts
Funded by National Science Foundation - Grant # NSF-DUE-CCLI-0127331 - to Chris Condit 2002-2005
A page in support of a manuscript submitted by Teri Boundy and Chris Condit to the Journal of Geoscience Education
Link to a page that provides downloads of Dr. Teri Boundy's volcanologic and petrologic exercises to be used with the DDM of the Tatara-San Pedro (DDM-TSP) volcanic field, also described in the paper submitted to JGE . The page includes descriptions of the archives's contents.

This page describes the exercises and data used in the petrologic modeling of the Springerville volcanic field, as found in Boundy and Condit (submitted), and provides links to download those exercises and data. It requires the use of the Dynamic Digital Map of the Springerville Volcanic Field (DDM.SVF) (Condit, 1995a, 1995b) which may be supplemented by the U.S. Geological Survey's MI Map I-2431 (Condit and others, 1999). A link to information about DDMs, and downloads for them can be found at the DDM Homepage. The modeling requires the use of the petrologic plotting and modeling programs "IgPet" and "mixing" by Mike Carr of Rutgers University (carr@rci.rutgers.edu).
The intent of these exercises is to give the beginning igneous petrology student an appreciation for, and experience in:
These exercises include detailed annotated step-by-step procedures that both guide the students in the use of the programs, and give them insights into why and what information is useful in this effort. The exercises are set up so that the last exercise (PetModelLab2, below) may be omitted if it cannot be fit into the available time. The first assignment (Intro2DDM.SVF) may also be done by itself and viewed as an introduction to what a cinder cone and flow dominated volcanic field looks like from a petrologic and volcanologic point of view.

Downloads

  • Download a self-extracting archive of documents (1) to (6) below for MacIntosh or Win32 (all Windows) computers.
  • Download a self-extracting archive of folder SVFGeochem (item 7 below)containing all geochemical data files for MacIntosh or Win32 (all Windows) computers.

Descriptions of Documents

  • (1) Intro2DDM.SVF
    (90 min lab, 5 pages, MS Word document, 32 short-answer questions)
    Contains step-by-step procedures to the use of DDM.SVF
    Gives the user an overview of both the DDM.SVF program, and the geology and petrology of the Springerville volcanic field.
  • (2) PetModelLab1
    (3-hour lab + homework to complete write-up, 7 pages, 1 table, 1 figure in an MS Word document, [that shows what symbols are used to represent each mineral and flow unit (whole rock chemistry, by the sample unit's lithologic type)].
    Contains detailed instructions which walk the student through how to use the programs DDM.SVF, IgPet and Mixing to formulate and test a hypothesis that two lava flows are petrogenetically related by the process of crystal fractionation. Includes instructions on use of IgPet to construct x-y plots of whole-rock and mineral chemistry, and making mineral-extract polygons. Also includes detailed instructions on the use of Mixing program to do a fractional crystallization model. Figure 1 . (Assumes you've done Intro2DDM.SVF above)
  • (3) PetModelLab1Quest
    Contains 22 questions, 2 pages, in an MS Word document, for use with above (2) download.
    Includes questions organized in a framework to facilitate a write-up of the lab. Questions are keyed to the annotated procedures in the PetModelLab1 handout.
  • (4) PetModelLab2
    3 hour lab + homework, 4 pages in an MS Word document, 1 table (indexing all available mineral chemistry in SVF, listed by flow).
    Includes 10 questions designed to build on previous lab and give students instructions on how to carry out their own petrologic modeling, and enumerates what is expected of them as they write up the results of their work. Last page is a suggested organization for their "mini" research paper.
  • (5) MixModelLabGradingSheet.doc
    2 pages, MS Word document, with check list of areas that will be evaluated in grading of PetModelLab1 and PetModelLab2.
  • (6) PetModelExPage
    MS Word document, a text version summary of this page.
  • (7) SVFGeochem
    All SVFGeochem files are formatted for IgPet in tab-delimited files, which could also be loaded into spreadsheets. The IgPet formats include code so that all minerals plot as a unique symbol by mineral type, and all whole-rock chemistry samples plot with a symbol, that by default, indicates the lithologic type of the sample's unit (see Figure 1, of PetModelLab above). An alternative code enables you to plot whole rock samples by chemical type.

All file names and sample numbers include both sample and unit ID in their name (e.g. file 214IP_Qbc2 is the analysis for sample 214IP, from unit Qbc2).

Descriptions of Data Sets

(7) The folder 'SVFGeochem' includes:
  • 216L_Qbb2.min - five mineral analyses from unit Qbb2.
  • Qbb2&QTsf.roc - two major element analyses, one for each unit: Qbb2 and QTsf.
  • SVFIndivMinChemsIgPet - folder that contains 160 individual files, each with a single mineral's chemical analysis.
  • SVFMinChem2003.02.10.min - 160 mineral analyses contained in a single file.
  • SVFMinsByFlowIgPet - folder containing 43 files, one for each sample. In a given file, all mineral chemistry for that sample are included. Some flow-fields contain multiple samples.
  • SVF_IndivRxChemsIgPet - folder containing 517 individual whole-rock major element chemical analyses.
  • SVF_518MajChem2003.02.10.roc - a single file containing all 518 whole-rock major element chemical analyses for the SVF. Last two field includes a best estimate for the age of the rock and area (in km2) of the rock's unit.
  • SVF_RxChemsByArea - folder that includes 21 files, with one file with all 518 whole-rock chemistry analyses for SVF, and 20 files, each containing whole-rock chemistry for one of the 20 geographic areas of the SVF.
  • SelSuitMajEl&DCPTrc2000.01.24a - file that includes 89 whole-rock and 9 trace element analyses for samples in SVF (trace elements include Zr, Y, Ni, Sc, Cr, Sr, Ba, Zn, and V).
  • SVFMinRxSymbFile.txt - IgPet formatted file that shows all mineral and whole rock (lithologic) symbols used in plots of all data of SVF by IgPet.

    • References Cited

    Condit, C.D., 1995, Dynamic Digital Map: The Springerville Volcanic Field: Prototype color digital maps with ancillary data Boulder Colorado, Geol. Soc. Am. Digital Pub. Series DPSM01MC (CD-ROM for the Macintosh); v. 4.10.95 size: 36.7 megabytes.

    Condit, C.D., 1995, DDM.SVF: A prototype Dynamic Digital Map of the Springerville volcanic field, Arizona, GSA Today, v.5, p. 69, 87-88.

    Condit, C.D., Crumpler, L.S., and Aubele, J.C., 1999, Lithologic, age-group, magnetopolarity and geochemical maps of the Springerville volcanic field, east-central Arizona, (1:100,000): U.S. Geol. Survey MI Map I-2431, 5 sheets.


    Bug reports and suggestions to ccondit@geo.umass.edu
    Updated 2003.09.17

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