Photo courtesy of Nathanael Telus

Education:

Ph.D. in Geology and Geophysics (2009-2015)
Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa
Research Advisor: Dr. Gary R. Huss

B.S. in Geophysical Sciences (2004-2008)
Department of Geophysical Sciences, University of Chicago
Research Advisor: Dr. Nicolas Dauphas

Research in Meteoritics:

The initial abundance of 60Fe in the solar system:
My dissertation research focuses on constraining the initial abundance of 60Fe (t1/2 = 2.6 Myr) in the solar system by measuring the Fe and Ni isotopic composition of chondrules from various unequilibrated ordinary chondrites (UOCs) using the Cameca ims 1280 ion microprobe at the University of Hawaii.

Is the Fe-Ni isotopic system closed in chondrules from UOCs?
We find evidence for the extinct short-lived radionuclide 60Fe in chondrule silicates from primitive ordinary chondrites using the ion microprobe.  However, the data suggest that the Fe-Ni isotopic system in UOC chondrules is disturbed.  To understand the degree to which the Fe-Ni isotopic system in primitive meteorites remained closed we collected high resolution maps of Ni and other trace elements in and around chondrules in UOCs using the Maia-384 detector on the Australian Synchrotron X-ray fluorescence beamline. The X-ray maps show that Fe and Ni in UOCs have been mobilized by late-stage fluid. 

26Al-26Mg systematics of plagioclase from H4 chondrites:
This study stems directly from our work on ratio bias in SIMS data. We evaluate the possible influence of ratio bias on the published initial 26Al/27Al ratios for these meteorites by reanalyzing the Al/Mg ratios and Mg isotopic composition of plagioclase from fast-cooled H4 chondrites. We find that ratio bias is not significant for this dataset, and we argue that the 26Al-26Mg (t1/2 = 0.7 Myr) ages for these chondrites are not consistent with the onion shell model for the H chondrite parent body.

Publications: click here for an up-to-date list

  • Telus M., Huss G.R., Nagashima K., Ogliore R.C., and Tachibana S. (2017) In situ 60Fe-60Ni systematics of chondrules from unequilibrated ordinary chondrites. Geochimica et Cosmochimica Acta (accepted; http://dx.doi.org/10.1016/j.gca.2017.06.013).
  • Telus M., Huss G.R., Ogliore R.C., Nagashima K., Howard D.L., Newville M.G., and Tomkins A.G. (2016) Mobility of iron and nickel at low temperatures and implications for 60Fe-60Ni analyses of UOC chondrules. Geochimica et Cosmochimica Acta. DOI: 10.1016/j.gca.2015.11.046
  • Keil K., et al. (2015) The Vicencia meteorite fall: A new unequilibrated S1 LL3.2 ordinary chondrite. Meteoritics & Planetary Science 50, 1089-1111. DOI: 10.1111/maps.12456
  • Telus M., Huss G.R., Nagashima K., and Ogliore R.C. (2014) Revisiting 26Al-26Mg systematics of plagioclase in H4 chondrites. Meteoritics & Planetary Science 49, 929-945. DOI: 10.1111/maps.12304
  • Telus M., Huss G.R., Ogliore R.C., Nagashima K., and Tachibana S. (2012b) Recalculation of data for short-lived radionuclide systems using less-biased ratio estimation. Meteoritics & Planetary Science 47, 2013-2030. DOI: 10.1111/j.1945-5100.2012.01411.x
  • Telus M., Dauphas N., Moynier F., Teng F-Z., Nabelek P.I., Craddock P.R., and Groat L.A. (2012a) Iron, zinc, magnesium and uranium isotopic fractionation during continental crust differentiation: The tale from migmatites, granitoids, and pegmatites. Geochimica et Cosmochimica Acta 97, 247-265. DOI: 10.1016/j.gca.2012.08.024.

Presentations:

  • Telus M.  (2017) In situ Analyses of Carbonates and Magnetite in CM1 Chondrites. 48th Lunar & Planetary Science Conference. Abstract #1725 (Oral Presentation)
  • Telus M.  (2016) Carbonates: Tracers of fluid flow on early planetesimals. University of Maryland, College Park (Invited Presentation)
  • Telus M.  (2016) Carbonates: Tracers of fluid flow on early planetesimals. Brown University (Invited Presentation)
  • Telus M. et al. (2016)  In situ C and O Isotopic Analyses of Calcite in CM1 Chondrites. Meteoritical Society Conference, Abstract #5326. (Oral Presentation)
  • Telus M. et al. (2016)  D/H of Phosphates in H4 Chondrites. 47th Lunar & Planetary Science Conference, Abstract #1742.  (Poster Presentation)
  • Telus M. et al. (2016)  60Fe-60Ni systematics of chondrules: Constraints from In situ Analyses. 47th Lunar & Planetary Science Conference, Abstract #1816.  (Poster Presentation)
  • Telus M.  (2016) The Initial Abundance of 60Fe and the Implications for Solar System History. Department of Terrestrial Magnetism, Carnegie Institution of Washington  (Invited Presentation)
  • Telus M.  (2016) Chondrites: Records of early planetesimal formation and evolution. University of California, Santa Cruz (Invited Presentation)
  • Telus M.  (2016) 60Fe and the Stellar Source of Extinct Radionuclides. University of California, Santa Cruz (Invited Presentation)
  • Telus M.  (2015) 60Fe in the Early Solar System. Carnegie Origins 2015 (Oral Presentation) 
  • Telus M. et al. (2015) The 60Fe-60Ni systematics of UOC chondrules, open-system redistribution compromises its usefulness. 46th Lunar & Planetary Science Conference, Abstract #2550. (Poster Presentation)
  • Telus M. (2015) Extinct radionuclides and the special case of 60Fe. Washington University in St. Louis. (Invited Oral Presentation)
  • Telus M. (2014) Early solar system chronology and the elusive iron-60. Muséum National d’Histoire Naturelle. (Invited Oral Presentation)
  • Telus M., et al. (2014) Synchrotron XRF Fe and Ni mapping and Ni XANES of UOC chondrules: Implications for interpreting 60Fe-60Ni Analyses. Meteoritical Society Conference, Abstract #5431. (Oral Presentation)
  • Telus M., et al. (2014) Synchrotron XRF mapping of Fe, Ni and other  elements in UOC chondrules: Implications for interpreting 60Fe-60Ni Data. 45th Lunar & Planetary Science Conference, Abstract #2559. (Poster Presentation)
  • Telus M., et al. (2014) 26Al-26Mg systematics of plagioclase in H4 chondrites: Implications for the H-chondrite parent body. 45th Lunar & Planetary Science Conference, Abstract #2697. (Oral Presentation)
  • Telus M. (2014) Synchrotron XRF mapping of Fe, Ni and other  elements in UOC chondrules: Implications for interpreting 60Fe-60Ni Data. Australia National University. (Invited Oral Presentation)
  • Telus M. (2013) 60Fe-60Ni systematics of chondrites: Then & Now. Department of Terrestrial Magnetism. (Invited Oral Presentation)
  • Telus M., et al. (2013) 60Fe-60Ni systematics of chondrules from UOC QUE97008: Comparing results from in situ and bulk analyses. Meteoritical Society Conference, Abstract #5294. (Oral Presentation)
  • Telus M., et al. (2013) Initial abundance of 60Fe in unequilibrated ordinary chondrites. 44th Lunar & Planetary Science Conference, Abstract #2964. (Poster Presentation)
  • Telus M., et al. (2012) A test of possible ratio bias in 26Al-26Mg measurements of plagioclase from the H4 chondrite Ste. Marguerite. Meteoritical Society Conference, Abstract #5364. (Oral Presentation)
  • Telus M., et al. (2012) Reevaluating our understanding of the 60Fe-60Ni system in chondrites. 43rd Lunar & Planetary Science Conference, Abstract #2733. (Oral Presentation)
  • Telus M. et al., (2011) The initial abundance of 60Fe in the inner solar system: Evidence from chondrites. Workshop on Formation of the First Solids in the Solar System, Abstract #9127. (Invited Oral Presentation)
  • Telus M. et al., (2011) Development of SIMS mulitcollection Fe and Ni isotopic measurements. Biennial Geochemical SIMS Workshop.
  • Telus M. et al., (2011) Development of routine multicollection Ni-isotopic analysis of Fe-rich silicates by ion microprobe. Meteoritical Society Conference, Abstract #5326. (Oral Presentation)
  • Telus M. et al., (2011) Possible heterogeneity of 60Fe in chondrules from primitive ordinary chondrites. 42nd Lunar & Planetary Science Conference, Abstract #2559. (Oral Presentation)

Successful Proposals, Fellowships & Awards:

  • Fellowship (2015) Timing and Evolution of Aqueous Alteration on Chondrite Parent Bodies, DTM – Carnegie Institution of Washington
  • Proposal (2014) XRF Mapping of Ni in Chondrules from Primitive Meteorites to Constrain their Metamorphic History, Advanced Photon Source #37510
  • Proposal (2014) XRF Mapping of Ni and Other Trace Elements in Chondrules to Constrain their Metamorphic History, Australian Synchrotron #M7594
  • Proposal (2013), XRF mapping of Ni and Other Trace Elements in Chondrules to Constrain their Metamorphic History, Australian Synchrotron #M6665
  • Fellowship (2011-2014), Developing 60Fe-60Ni Chronometry to Investigate Early Solar System Processes, NASA Earth & Planetary Science Fellowship
  • Award (2011-2014), Travel awards to the Meteoritical Society Conference
  • Award (2011), Watumull Scholarship for excellence in graduate research, University of Hawaii at Manoa
  • Award (2004-2013) Gates Millennium Scholarship 

Professional Service:

  • Participant, 2017 Lunar & Planetary Science Conference Education and Outreach Programs.
  • Guest speaker, Washington College Toll Science Center, “Cosmochemistry and the Origin of the Solar System,” March 2017
  • Guest speaker, James Madison University John C. Wells Planetarium, “Extinct radionuclides and what they tell us about Solar System formation,” April 2016 
  • Guest speaker, St. James School, Philadelphia, PA, 5-7th grade, “Careers in Geology and Planetary Science”, April 2014
  • Coordinator, HIGP weekly seminars, Fall 2011 – Spring 2014
  • Executive Secretary, Cosmochemistry Review Panel 2013
  • Teaching Assistant, Voyage through the Solar System (University of Hawaii at Manoa, 2012-2014)

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