LEVERAGING IODP SAMPLES, DATA AND EDUCATION/OUTREACH RESOURCES IN - - PowerPoint PPT Presentation

LEVERAGING IODP SAMPLES, DATA AND EDUCATION/OUTREACH RESOURCES IN SUPPORT OF A COURSE-BASED UNDERGRADUATE RESEARCH EXPERIENCE (CURE): BENEFITS AND CHALLENGES

Jeffrey G Ryan1, Antonio Luna1, Chris Vidito2, Rosemary Hickey-Vargas2, James MacDonald3, Mary Beck4

1School of GeosciencesUniversity of South Florida 2Earth and Environment, Florida International University 3Marine and Ecological Sciences, Florida Gulf Coast University 4Valencia College

Course-based undergraduate research experiences (CURES)

• Identified as a best practice to adopt

in the PCAST report (2012)

• Topic of an NRC Convocation: 2015

Upside:

• Potential to bring

undergraduate research to large numbers of students

Downside:

• Serious challenges re: costs and sustainability

How do we make a cost-effective geoscience CURE model?

Expanding the Use of Online Remote Electron Microscopy in the Classroom to Transform Undergraduate Education

NSF-TUES Program Expansion project (Type 2)

• Assessing the

integration of microbeam instrumentation into introductory and upper-level undergraduate geoscience courses

Come try out the FCAEM microprobe/SEM at our booth in the Exhibit Hall!

“CURE” implementations at

• Univ. South Florida

and Forida Gulf Coast Univ.

USF GLY 3311C (Mineralogy, Petrology,

Geochemistry) “CURE” model:

• Piloted with NSF-CCLI

support (2006); it’s ongoing (institutionalized)

• “Petrology” part of the

course is built around a class analytical project

• Historically: study of

unknowns from locations in the NC Blue Ridge, collected during an extended class field trip.

Challenges:

• Time and course logistics (nothing can

start until after the field trip)

• Students make their own thin sections
• time away from other course tasks
• and highly imperfect!
• (but commercial takes too long…)
• Metamorphic petrology focused
• (complex, messy….)

IODP Expedition 352 (2014)

Drilled sites in the Izu-Bonin forearc

• Objective: recover a reference section
• f oldest subduction-related lavas, to

understand IBM arc evolution and the

• rigins of supra-subduction ophiolites.
• (I was a Shipboard Scientist…)
• Samples recovered:
• Fore-arc basalts (FABs: aphyric

subduction initiation tholeiites)

• Boninites: Anomalous high Mg, low

Ti lavas formed by hydrous melting

• f mantle harzburgites.
• Boninites are crystal-rich with

varied mineral assemblages (olivine, pyroxenes, spinels, zeolites, carbonates)

• Boninites are unique

compositionally and petrologically

• [e.g. a good, if unusual, kind of

rock to target in a petrology class]

New topic for GLY 3311C investigation, Fall 2016: mineralogy and petrology of IODP Expedition 352 boninites

• 30 highly phyric Expedition 352

boninites obtained from the IODP Kochi Core Repository

• These samples are available for

BOTH research and educational activities w/ appropriate justification

• Curators worked with me to pick
• ut highly phyric, visibly

“messy” samples for class analysis (VERY different from my research samples!)

• Polished thin sections prepared of each sample
• Costs paid out of course lab fees
• Each student assigned a sample/section to

conduct handsample/microscopic petrography

• Samples to microprobe (6-8) for mineral

chemistries selected by the students

• {Data collected to be provided to IODP}

In-Class activities and Supports

• Expedition 352 Proceedings and

Preliminary Report assigned to the class as secondary texts

• Both are freely available online!
• Laboratory mineralogy activities re-
• riented toward the minerals that

students were likely to encounter:

• Primary : olivine, pyroxenes,

plagioclase, spinels

• Secondary zeolites, carbonates,

chlorite

Walker et al 1979; Stopler et al 1980

Laboratory petrology activities changed to emphasize mafic igneous rocks and phase equilibria

IODP Sample and Data Resources

With the samples come the compiled data from the Expedition, in the IODP repository and reports….

IODP Gulf Coast Core Repository (College Station TX) – optional class “field” trip

Interested students took part in an optional “field trip” to the Gulf Coast Core repository, where they examined DSDP, ODP, and IODP cores from the Pacific and participated in demonstrations of core imaging and analysis tools…

Results so far….

U1439C 5R1, whole section image, (IODP)

U1439A 21X1

• (boninite)
• SiO2
• TiO2
• Al2O3
• FeO
• MgO
• MnO
• CaO
• Na2O
• K2O
• NiO
• Cr2O3

P2O5

• Total
• Enstatite

phenocrysts 57.18 0.00 0.67 7.70 32.33 0.07 1.24 0.04 0.01 0.07 0.42 99.73 56.44 0.00 1.19 8.74 31.68 0.09 1.54 0.02 0.00 0.10 0.61 100.39 56.74 0.07 1.05 8.05 32.77 0.08 1.11 0.03 0.00 0.07 0.62 100.58 56.97 0.07 1.05 7.85 33.16 0.07 1.39 0.00 0.01 0.09 0.69 101.34 56.99 0.00 1.11 7.73 33.40 0.09 1.29 0.00 0.01 0.10 0.69 101.39 Pigeonite matrix crystals 55.514 2.095 10.561 27.896 0.114 4.271 0.052 0.001 0.077 0.307 100.888 52.641 0.364 4.016 10.867 22.721 0.107 9.851 0.094 0.018 0.076 0.185 100.94 Spinels (Cr-Fe-Mg-Al) 0.12 0.133 8.397 23.62 11.125 0.176 0.06 0.049 0.125 58.16 101.965 0.308 0.019 8.622 19.334 10.539 0.161 0.036 0.009 0.141 60.138 99.307

U1442A 49R1 (differentiated boninite) Low Ca pyroxenes

55.09 0.25 2.07 8.24 26.00 0.10 7.85 0.07 0.02 0.04 0.50 0.00 100.23 54.63 0.00 2.02 7.65 24.85 0.08 9.30 0.11 0.02 0.05 0.84 0.00 99.54 51.63 0.34 13.77 8.14 9.97 0.09 13.75 0.62 0.15 0.00 0.00 0.00 98.46 53.88 0.02 2.82 7.03 23.30 0.13 11.47 0.09 0.00 0.01 0.84 0.00 99.60 54.43 0.14 2.08 9.21 26.15 0.12 7.07 0.10 0.00 0.03 0.30 0.03 99.64

Glass (defocused beam)

55.95 0.48 16.24 7.36 6.17 0.07 10.18 1.22 0.26 0.00 0.03 0.00 97.96 53.90 0.12 16.31 7.13 6.22 0.07 10.32 2.14 0.24 0.00 0.00 0.06 96.49

• 28 students completed term projects focused on

petrography and microprobe characterization of boninite mineralogy…

• Student feedback largely positive
• Concerns about field trip costs (it was optional)
• Four students (so far) working on post-course

research.... Similar numerical outcomes to past GLY 3311C

• fferings

Unanticipated outcome: U1439C 15R1; U1439C 25R1

Enstatite Cores… Augite Rims (??) Fo 85-88 olivine cores… Fo 68 olivine rims (!!)

Mineral Chemistry Evidence for Magma Mixing in Boninites, Sites U1439 and U1442, IODP Expedition 352

• J. Scholpp, B. Mack, et al, 2017 (yesterday….)

GLY 3311C CURE comparisons….

Previous years IODP-based

Curricular High P-T Metamorphic minerals; subsolidus phase equilibria Igneous and Low T metamorphic minerals; igneous phase equilibria Logistics Field trip preparation for 25+ students… IODP Sample request (6 weeks); commercial thin sections (4-5 weeks) Costs to students Field Trip Fee ($200+); $40 lab fee (1 hr probe time) $30 polished section (re- usable); $40 probe time. Field trip optional… Science produced Some new data on S. Appalachian rocks, has been used in MS theses… Research-grade results on boninite minerals.. Student outcomes Post-course research seeded Research findings in class (!!), and post-course research seeded.

Similar enough.. Similar enough.. Cheaper! Better! Better! Using IODP samples and resources for class-based undergraduate research?

• Promising initial outcomes!
• Potential for good sustainability (40+ years of

DSDP/ODP/IODP cores....)

• Worth further investigation…
• (maybe the Tamu Massif next time?)