Donald J. DePaolo

Donald J. DePaolo is an American professor of geochemistry in the Department of Earth and Planetary Science at the University of California, Berkeley and Associate Laboratory Director for Energy and Environmental Sciences at the Lawrence Berkeley National Laboratory.

Donald J. DePaolo on a University of California Berkeley field trip, 2009.

Biographical Summary

Donald J. DePaolo was born in 1951. He grew up in upstate New York.

Career

DePaolo received his B.S. degree with Honors in Geology from SUNY Binghamton in 1973 and earned his Ph.D. in geology with a minor in chemistry under Gerald Wasserburg at the California Institute of Technology in 1978. In the same year DePaolo began an assistant professorship at the University of California Los Angeles Department of Geology and Geochemistry and subsequently earned his associate (1981–1983) and full professorship (1983–1988). In 1988 he began his term as Professor of Geochemistry at the University of California Berkeley in the Department of Earth and Planetary Science, with a joint appointment as a Faculty Scientist in the Earth Sciences Division at the Lawrence Berkeley National Laboratory (LBNL) [1]. Upon his arrival in Berkeley Dr. DePaolo established and directs the Center for Isotope Geochemistry, a joint research facility between LBNL and UC Berkeley [2]. In 1998 he was made the Class of 1951 Professor of Geochemistry and served as chair of the department from 1990 to 1993. From 1998-2006 DePaolo served as Geochemistry Department Head at LBNL, in 2007 he became Earth Sciences Division Director and from 2010-2011 he served as Acting Associate Laboratory Director for Energy and Environmental Sciences before accepting the position permanently on April 1, 2011. In Spring of 2009, DePaolo became the Director of the Center for Nanoscale Control of Geologic CO2 (EFRC) [3].

Research Interests

DePaolo has coauthored over 170 peer-reviewed articles and reviews. His research interests focus on using naturally-occurring isotope variations to explore questions such as

• Origin of the deep-source Hawaiian plume and other hotspots and theories on mantle dynamics [4]
• Tracking fluids moving through groundwater systems, with application to tracing contaminants
• Understanding isotopic fractionation of molten materials
• Magma chamber processes and life cycles of volcanoes
• Isotopic evidence that may lead to detecting life on other planets
• Chronology studies of of both difficult-to-date young volcanic rocks and ancient continental rocks
• Isotopic composition of old ocean sediments, with implications for climate shifts

Major Contributions

In his early career, DePaolo pioneered the use of samarium and neodymium isotope ratios to constrain the age and chemical evolution of rocks. DePaolo and his then advisor Gerald Wasserburg made the first Nd isotope measurements on terrestrial igneous rocks [5]. An important byproduct of this work was the development of epsilon notation (ε), with which initial ¹⁴³Nd/¹⁴⁴Nd values could be distinguished from the chondritic uniform reservoir (CHUR) in parts per ten thousand. Key principles of the Nd isotope system were laid out in his 1988 book, Neodymium Isotope Geochemistry: An Introduction.

DePaolo’s work has since led to significant advances in using various isotope systems to constrain rates of metamorphic processes [6], quantify continental weathering and elemental seawater budgets through geologic time [7][8], and model fluid-rock interactions [9]. As principal investigator of the Hawaii Scientific Drilling Project (HSDP), DePaolo and coworkers sampled the flank of Mauna Kea volcano to a depth of several kilometers. Major findings included a determination of the geochemical structure of the Hawaiian mantle plume [10]. DePaolo’s recent research provides a framework for understanding the partitioning of stable isotopes during mineral growth, with a focus on isotopes of calcium [11].

Recent Service

• 2008 DOE/Basic Energy Sciences/BESAC subcommittee on New Era Science
• 2005-2008 Chair NRC Committee on Grand Research Questions in Earth Sciences
• 2003-2008 NSF Continental Dynamics Panel, EAR
• 2004-2008 Science Advisory Committee SAFOD
• 2007-2010 Day Medal Committee, GSA
• 2002- Board of Directors, Berkeley Geochronology Center
• 2005-2008 CIDER steering Committee

Special Awards and Honors

• 2009 Fellow, American Association by the Advancement of Science
• 2000 Harold Urey Medal, European Assoc. of Geochemistry
• 2000 John Simon Guggenheim Fellow
• 1999 Arthur L. Day Medal, Geol. S
• 1997-98 Miller Research Professor, U.C. Berkeley
• 1997 Geochemistry Fellow, Geochem. Soc. and EAG
• 1997 Fellow, Geological Soc. Am
• 1994-95 Fulbright Senior Scholar, Australia National University
• 1994 Fellow, American Academy of Arts and Sciences
• 1993 Member, National Academy of Sciences
• 1992 Fellow, California Academy of Sciences
• 1987 Mineralogical Society of America Award
• 1987 Fellow, Mineralogical Society of America
• 1983 J.B. MacElwane Award, American Geophysical Union
• 1983 Fellow, American Geophysical Union
• 1978 F.W. Clarke Medal, Geochemical Society

External links

• [1] DePaolo's UC-Berkeley webpage
• [2] Center for Isotope Geochemistry
• [3] Center for Nanoscale Control of Geologic CO2
• [4] HSDP
• [5] Nd Isotopic Variations and Petrogenetic Models
• [6] Rates of Tectonometamorphic Processes from Rubidium and Strontium Isotopes in Garnet
• [7] Seawater Strontium Isotopic Variations from 2.5 Million Years Ago to the Present
• [8] Isotopic Evidence for Variations in the Marine Calcium Cycle Over the Cenozoic
• [9] Isotopic effects in fracture-dominated reactive fluid–rock systems
• [10] Deep Drilling into a Mantle Plume Volcano
• [11] Surface kinetic model for isotopic and trace element fractionation during precipitation of calcite from aqueous solutions