Lawrence Livermore National Laboratory

Ben Jacobsen

Research Staff
Glenn T. Seaborg Institute
Nuclear and Chemical Sciences Division

 +1 925-422-1952

Ph.D. Geology
University of California at Davis
M.S. Geology
University of Copenhagen
B.S. Geology
University of Copenhagen

Research Interests

Dr. Jacobsen's research is primarily in geo/cosmochemistry and nuclear forensics. He does isotopic and chemical in situ analyses of primordial solar nebular objects found in primitive meteorites to understand their chronological and compositional evolution within the proto-planetary Solar System disk. Dr. Jacobsen applies the same analytical techniques that he uses for his cosmochemistry research, to research isotopic and chemical signatures in nuclear materials.


Kvasnytsya, V., Wirth, R., Dobrzhinetskaya, L., Matzel, J., Jacobsen, B., Hutcheon, I. Tappero, R., and Kovalyukh, M. (2013). New evidence of meteoritic origin of the Tunguska cosmic body. Planetary and Space Science 84: 131-140.

Kita, N. T., Yin, Q.-Z., MacPherson, G. J., Ushikubo, T., Jacobsen, B., Nagashima, K., Kurahashi, E., Krot, A. N., and Jacobsen, S. B. (2013). 26Al-26Mg isotope systematics of first solids in the early solar system. Meteoritics and Planetary Science 48: 1383-1400.

Jacobsen, B., Wasserburg, G. J., McKeegan, K. D., Hutcheon, I. D., Krot, A. N., Yin, Q.-Z., and Matzel, J. E. (2013). Resetting and disturbance to the Al-Mg system in Allende Type B CAIs. Lunar and Planetary Science Conference, 44: A2941.

Matzel, J. E. P., Simon, J. I., Hutcheon, I. D., Jacobsen, B., Simon, S. B., and Grossman, L. (2013). Oxygen isotope measurements of a rare Murchison Type A CAI and its rim. Lunar and Planetary Science Conference, 44: A2632.

Simon, S. B., Davis, A. M., Hutcheon, I. D. and Jacobsen, B. (2012). Cosmochemistry. In McGraw-Hill Encyclopedia of Science and Technology, 11th edition, 4: 817-828.

Marks, N. E., Borg, L. E., Hutcheon, I. D., Jacobsen, B., Clayton, R. N., and Mayeda, T. K. (2012). Temporal and spatial heterogeneities in the solar nebula reflected in Rb-Sr and Sm-Nd systematics of Al3S4, an Allende Type B CAI. Lunar and Planetary Science Conference, 43: A2259.

Jacobsen, B., Matzel, J., Hutcheon, I. D., Krot, A.N., Yin, Q.-Z, Nagashima, K., Ramon, E., Weber, P., Ishii, H. A., and Ciesla, F. (2011). Formation of the short-lived radionuclide 36Cl in the protoplanetary disk during late–stage irradiation of a volatile–rich reservoir. The Astrophysical Journal 731: L28-L33.

Tollstrup, D. T., Wimpenny, J. B., Yin, Q.-Z., Ebel, D. S., Jacobsen, B., and Hutcheon, I. D. (2011). Renewed search for FUN (Fractionated and Unidentified Nuclear Effects) in primitive chondrites. Lunar and Planetary Science Conference, 42: A2216.

Ishii, H. A., Krot, A. N., Keil, K., Nagashima, K., Bradley, J. P., Teslich, N., Jacobsen, B., and Yin, Q.-Z. (2010). Discovery, mineral paragenesis, and origin of wadalite in a meteorite. American Mineralogist, 95: 440-448

.Matzel, J. E. P., Jacobsen, B., Hutcheon, I. D., Krot, A. N., Nagashima, K., Yin, Q.-Z., Ramon, E. C., Weber, P. K., and Wasserburg, G. J. (2010). Distribution and origin of 36Cl in Allende CAIs. Lunar and Planetary Science Conference, 41: A2631.

Krot, A. N., Nagashima, K., Hutcheon, I. D., Ishii, H. A., Jacobsen, B., Yin, Q.-Z., Davis, A. M., and Simon, S. B. (2010). Mineralogy, petrography, oxygen and magnesium isotopic compositions and formation age of grossular-bearing assemblages in the Allende CAIs. Lunar and Planetary Science Conference, 41: A1406.

Shen, B., Jacobsen, B., Lee, C.-T., Yin, Q.-Z., & Morton, D.M. (2009) The Mg isotopic signature of granites and the role of weathering in continent formation. Proceedings of the National Academy of Sciences 106, 20652-20657

Jacobsen, B., Matzel, J., Hutcheon I.D., Ramon E., Krot A.N., Ishii H.A., Nagashima K., & Yin Q.-Z. (2009) The 36Cl–36S Systematics of Wadalite from the Allende Meteorite. Lunar and Planetary Science Conference XL, A2553

Jacobsen, B., Yin, Q.-Z., Moynier, F., Amelin, Y., Krot, A.N., Nagashima, K., Hutcheon, I.D., & Palme, H. (2008) 26Al-26Mg and 207Pb-206Pb Systematics of Allende CAIs: Canonical Solar Initial 26Al/27Al Ratio Reinstated. Earth and Planetary Science Letters, 272, 353-364

Jacobsen, B., Cosarinsky, M., Wasserburg, G.J., Yin, Q.-Z., McKeegan, K.D., Hutcheon, I.D., Krot, A.N. Nagashima, K. & Palme, H. (2008) Mg Isotopic Conposition of Low Al/Mg phases in CAIs: The Initial Solar 26Mg/24Mg? Lunar and Planetary Science Conference XXXIX, A2387

Debaille, V., Brandon, A.D., Yin, Q.Z., & Jacobsen, B. (2007) Coupled 142Nd-143Nd Evidence for a Protracted Magma Ocean in Mars. Nature, 450, 525-528

Yin, Q.-Z., Jacobsen, B., Moynier, F., & Hutcheon, I.D. (2007) Toward Consistent Chronology in the Early Solar System: High-Resolution 53Mn-53Cr Chronometry for Chondrules. Astrophysical Journal, 662, L43-L46

Moynier, F., Yin, Q.-Z., & Jacobsen, B. (2007) Dating the First Stage of Planet Formation. Astrophysical Journal, 671, L181-L183

Kent, A.J.R., Jacobsen, B., Peate, D.W., Waight, T.E., & Baker, J.A. (2004) Isotope dilution MC-ICP-MS Rare Earth Element Analysis of Geochemical Reference Materials NIST SRM 610, NIST SRM 612, NIST SRM 614, BHVO-2G, BHVO-2, BCR-2G, JB-2, WS-1, W-2, AGV-1, AGV-2. Geostandards and Geoanalytical Research, 28, 417-429.

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