PTYS/LPL Faculty

Kuiper 540


Jessica Barnes

Assistant Professor

Ph.D., 2015, The Open University and The Natural History Museum, London UK

Years with LPL: Fall 2019

Cosmochemistry, Lunar Studies, Planetary Analogs

My main research focus is on understanding the origin and evolution of volatiles in the inner Solar System. I utilize a combination of electron microscopy and high-resolution secondary ion mass spectrometry techniques to study the mineralogy, geochemistry, and petrological histories of a wide range of extraterrestrial materials.

My group is currently engaged in a project under the umbrella of Apollo Next-Generation Sample Analysis (ANGSA). The release of sample 71036 presents a unique opportunity to study volatiles in a basalt that has been frozen and specially preserved since its return, and to compare those results with basalts of similar bulk chemistries that have been stored at room temperature. This exceptional suite of basalts also offers a chance to unravel the history of volatile loss on the Moon, from the onset of mineral crystallization through vesicle formation, sampling, and subsequent curation. We are conducting a detailed study of the major, minor, and volatile element chemistry (including H isotopes) of H-bearing minerals and melt inclusions in four Apollo 17 basalts, and to determine the U-Pb and Ar ages of the basalts. 

Other ongoing projects include investigating the petrology of igneous lunar samples, coordinated microanalysis of meteorites to investigate the evolution of water in the Martian crust, and studies aimed at assessing the inventories and origins of volatiles on primitive chondritic and achondritic asteroids.

View LPL Evening Lecture from September 18, 2019 - The Geological History of the Moon from the Perspective of Unopened Apollo Samples

Current Grants

  • A Multifaceted Approach to Investigating the Magmatic and Post-magmatic History of Volatiles in Basalts from the Rim of Steno Crater - NASA - Apollo Next-Generation Sample Analysis (ANGSA) program. FY19-21. Principal Investigator.
  • Investigating the Origins and Evolution of Volatiles in the Inner Solar System - NASA - Early Career Award. FY20-23. Principal Investigator.
  • Acquisition of a BSE detector and MAPS software for the FIB-SEM in the Kuiper Imaging Facility - TRIF - FY20-21. Co-Investigator. Principal Investigator - T. Zega (UA).
  • Investigating Degassing Histories of Apollo 15 and 17 Lunar Basalts with 3D Visualization and Coordinated Microanalysis - NASA - Future Investigators in NASA Earth and Space Science and Technology (FINESST) Program. FY21-24. Principal Investigator. Future Investigator - Z. Wilbur (UA)

Current Spacecraft Involvement

  • Sample Science Collaborator NASA's OSIRIS-REx mission. The lead for the Sample Elements and Isotopes Analysis Working Group.

Current Graduate Students


Complete publications list available from: NASA ADS Author Search: Jessica J. Barnes and

Refereed publications (NASA ADS): Calendar Years 2018 through June 2020

McCubbin, F.M. and Barnes, J.J. The chlorine-isotopic composition of lunar KREEP from magnesian-suite troctolite 76535. American Mineralogist105(8), pp.1270-1274. 2020AmMin.10.2138/am-2020-7467

Barnes, J. J., McCubbin, F. M., Santos, A. R., Day, J. M. D., Boyce, J. W., Schwenzer, S. P., Ott, U., Franchi, I. A., Messenger, S., Anand, M., Agee, C. B. Multiple early-formed water reservoirs in the interior of Mars 2020NatGe..13..260B

Barrett, T. J., Barnes, J. J., Anand, M., Franchi, I. A., Greenwood, R. C., Charlier, B. L. A., Zhao, X., Moynier, F., Grady, M. M. Investigating magmatic processes in the early Solar System using the Cl isotopic systematics of eucrites 2019GeCoA.266..582B

Peslier, A. H., Hervig, R., Yang, S., Humayun, M., Barnes, J. J., Irving, A. J., Brandon, A. D. Determination of the water content and D/H ratio of the martian mantle by unraveling degassing and crystallization effects in nakhlites 2019GeCoA.266..382P

Barnes, J. J., Franchi, I. A., McCubbin, F. M., Anand, M. Multiple reservoirs of volatiles in the Moon revealed by the isotopic composition of chlorine in lunar basalts 2019GeCoA.266..144B

McCubbin, F. M., Barnes, J. J. Origin and abundances of H2O in the terrestrial planets, Moon, and asteroids 2019E&PSL.52615771M

Boyce, J. W., Kanee, S. A., McCubbin, F. M., Barnes, J. J., Bricker, H., Treiman, A. H. Early loss, fractionation, and redistribution of chlorine in the Moon as revealed by the low-Ti lunar mare basalt suite 2018E&PSL.500..205B

Barnes, J. J., Thompson, M. S., McCubbin, F. M., Howe, J. Y., Rahman, Z., Messenger, S., Zega, T. Coordinated Microanalysis of Phosphates in High-Titanium Lunar Basalts 2018MiMic..24S2078B

Potts, N. J., Barnes, J. J., Tartèse, R., Franchi, I. A., Anand, M. Chlorine isotopic compositions of apatite in Apollo 14 rocks: Evidence for widespread vapor-phase metasomatism on the lunar nearside ∼4 billion years ago 2018GeCoA.230...46P

Semester Course Day/Time Location Resources
Spring 2021 PTYS/GEOS 520-001 MW 9:30-10:45a.m. Kuiper 312 D2L
Fall 2021 PTYS 595B-001 MW 9:00-10:40a.m. Kuiper 312
Spring 2020 PTYS 510A-001 MW 12:30-1:45p.m. Kuiper 312 Syllabus
Course Page
Fall 2020 PTYS 595B-003 MW 11:00a.m.-12:40p.m. Kuiper 312 Syllabus
Course Page

Last updated on August 17, 2020