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force the deep crust to recrystallise, that exposure to air and water causes chemical weathering and that the basaltic oceanic crusts melts when it is subducted. Rudnick believes all three theories could explain the paradox of the composition of the crust. During subduction, ocean crust drops down, producing a series of volcanoes that are basaltic at first and later become non-basalt like. High magnesium rocks concentrate at the bottom.
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composition of continental crust that cannot be produced by basaltic magmatism - the building blocks of the continental crust do not match the edifice. There were several theories that explained the depletion; that the foundering of the magnesium and iron-rich lower crust occurs when tectonic plates
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to study near-surface continental processes. She used lithium isotopes to explore the influence of weathering on the composition of the continental crust. Lithium isotopes allowed her to trace recycling in crusts and other diffusional processes in earth. She demonstrated that reactive transport
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as a
Professor of Earth Sciences. There she continued work on using isotope fractionation to understand how chemical weathering of the continental crust has evolved alongside changing atmospheric chemistry. She is working on the concentration of heat producing elements (potassium, thorium and
295:, studied the upper continental crust. Rudnick was inspired to study the deep crust below, and chose to investigate granulites. She worked out the chemical composition and depths of
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as assistant professor, before being promoted to
Associate in 1997. Her work on the evolution of the continental crust has been cited over one thousand times. It explored the
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Teng, Fang-Zhen; Yang, Wei; Rudnick, Roberta L.; Hu, Yan (2013). "Heterogeneous magnesium isotopic composition of the lower continental crust: A xenolith perspective".
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causes kinetic isotope fractionation. She studied ancient glacial tills and demonstrated that ancient continents were rich in iron and magnesium. She also worked on
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1361:"NSF Award Search: Award#1650260 - U-Pb Thermochronology of Lower Crustal Xenoliths: Estimating Moho Temperature in Order to Constrain Crustal Heat Production"
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Gaschnig, Richard M.; Rudnick, Roberta L.; McDonough, William F.; Kaufman, Alan J.; Valley, John W.; Hu, Zhaochu; Gao, Shan; Beck, Michelle L. (2016-08-01).
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Greaney, Allison T.; Rudnick, Roberta L.; Romaniello, Stephen J.; Johnson, Aleisha C.; Gaschnig, Richard M.; Anbar, Ariel D. (2020-03-15).
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as a research fellow in 1989. She worked with Ian
Jackson and Dave Fountain on the lower continental crust. In 1994 Rudnick joined
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Rudnick, Roberta L.; Fountain, David M. (1995). "Nature and composition of the continental crust: A lower crustal perspective".
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1305:"Molybdenum isotope fractionation in glacial diamictites tracks the onset of oxidative weathering of the continental crust"
347:
154:
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Rudnick, Roberta L. (1983). "Geochemistry and tectonic affinities of a
Proterozoic bimodal igneous suite, west Texas".
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169:
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1204:"Compositional evolution of the upper continental crust through time, as constrained by ancient glacial diamictites"
430:
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Petrography, Geochemistry and
Tectonic Affinities of Meta-Igneous Rocks from the Precambrian Carrizo Mountain Group
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1476:(2012). "Presentation of the Dana Medal of the Mineralogical Society of America for 2012 to Roberta L. Rudnick".
1203:
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authors, Various (1985). "Large ion lithophile elements in rocks from high-pressure granulite facies terrains".
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Rudnick, R. L.; Taylor, S. R. (1987). "The composition and petrogenesis of the lower crust: A xenolith study".
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for her master's degree, specialising in geology. She worked on the geochemistry of metamorphic rocks in
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1042:"Constraints on continental crustal mass loss via chemical weathering using lithium and its isotopes"
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68:
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644:"Portland State College of Liberal Arts & Sciences: Department of Geology | Alumni M through Z"
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1280:"Robin Matoza and Roberta Rudnick join the Department faculty! | Earth Science - UC Santa Barbara"
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from 2000 to 2010. In 2012 she was made
Department Chair. In 2015 Rudnick joined
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1256:"Editor-In-Chief of Chemical Geology, Professor Roberta Rudnick, Elected to NAS"
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239:(born 1958) is an American earth scientist and professor of geology at the
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identify whether neutrinos come from the core, mantle or crust of earth.
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350:, in 2000. When she arrived at Maryland she began to consider the use of
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255:. Rudnick is a world expert in the continental crust and lithosphere.
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authors, various (1987). "Dating the lower crust by ion microprobe".
668:"GOOD NEWS: Sul Ross honors athletic standouts, distinguished alumni"
308:
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uranium) in the continental crust to estimate the Moho temperature.
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30:
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118:
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Teng, Fang-Zhen; Watkins, James; Dauphas, Nicolas (2017-03-06).
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267:. She completed her undergraduate studies in earth sciences at
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735:"Sul Ross State University, Fifty-Eighth Annual Commencement"
1401:"Rudnick Receives 2006 N. L. Bowen Award - Honors Program"
1017:"Roberta Rudnick Receives 2017 Harry H. Hess Medal - Eos"
713:
10.1130/0091-7613(1983)11<352:gataoa>2.0.co;2
962:
Rudnick, Roberta L. (1995). "Making continental crust".
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in 1980. She was only fifty miles from the eruption of
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Academic staff of the
Australian National University
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399:. She has received several large grants from the
1524:
1583:University of California, Santa Barbara faculty
1450:"Mineralogical Society of America - Dana Medal"
1046:Proceedings of the National Academy of Sciences
915:
582:Proceedings of the National Academy of Sciences
768:(PhD thesis). Australian National University.
786:
1553:University of Maryland, College Park faculty
1040:Liu, Xiao-Ming; Rudnick, Roberta L. (2011).
789:Journal of Geophysical Research: Solid Earth
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765:The nature of the lower continental crust
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287:. In 1988, Rudnick earned her PhD at the
186:The Nature of the lower continental crust
301:Sensitive high-resolution ion microprobe
299:. Whilst she was a student she used the
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380:University of California, Santa Barbara
241:University of California, Santa Barbara
150:University of California, Santa Barbara
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1138:. Walter de Gruyter GmbH & Co KG.
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1593:Presidents of the Geochemical Society
1578:Australian National University alumni
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393:American Academy of Arts and Sciences
319:Rudnick was appointed a von Humboldt
283:. Her master's thesis was titled the
275:. After graduating, Rudnick moved to
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1161:Geochemistry, Geophysics, Geosystems
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348:University of Maryland, College Park
155:University of Maryland, College Park
1309:Earth and Planetary Science Letters
832:Earth and Planetary Science Letters
311:were depleted in soluble elements.
13:
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328:Max Planck Institute for Chemistry
243:. She was elected a member of the
170:Max Planck Institute for Chemistry
14:
1604:
544:
486:
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1588:Scientists from Portland, Oregon
1568:Portland State University alumni
1563:Sul Ross State University alumni
1543:21st-century American geologists
1511:
1431:. National Academy of Sciences -
431:Mineralogical Society of America
413:2006 - N. L. Bowen award of the
253:Mineralogical Society of America
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1211:Geochimica et Cosmochimica Acta
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1136:Non-Traditional Stable Isotopes
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875:Geochimica et Cosmochimica Acta
866:
823:
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578:"Profile of Roberta L. Rudnick"
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332:Australian National University
289:Australian National University
165:Australian National University
74:Australian National University
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330:in 1987. She returned to the
895:10.1016/0016-7037(85)90268-6
852:10.1016/0012-821X(87)90028-8
762:Rudnick, Roberta L. (1987).
534:publications indexed by the
421:National Academy of Sciences
395:and a foreign member of the
361:Sudbury Neutrino Observatory
359:, helping physicists at the
247:in 2010 and was awarded the
245:National Academy of Sciences
7:
401:National Science Foundation
397:Chinese Academy of Sciences
391:Rudnick is a member of the
10:
1609:
1558:Harvard University faculty
1330:10.1016/j.epsl.2020.116083
441:American Geophysical Union
415:American Geophysical Union
409:American Geophysical Union
1548:American earth scientists
1232:10.1016/j.gca.2016.03.020
303:(SHRIMP) to date ancient
277:Sul Ross State University
269:Portland State University
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69:Sul Ross State University
64:Portland State University
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28:
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538:bibliographic database.
475:publications indexed by
403:. Other awards include:
259:Early life and education
1321:2020E&PSL.53416083G
1067:10.1073/pnas.1115671108
844:1987E&PSL..85..145R
809:10.1029/jb092ib13p13981
603:10.1073/pnas.1219069109
576:Downey, Philip (2012).
540:(subscription required)
447:V.M. Goldschmidt Medal
370:Rudnick has served as
307:. She identified that
1478:American Mineralogist
1111:"Meeting Information"
918:Reviews of Geophysics
419:2010 - Member of the
407:2005 - Fellow of the
795:(B13): 13981–14005.
84:William F. McDonough
1498:10.2138/am.2012.598
1490:2012AmMin..97.1816H
1389:0000-0003-1559-7463
1223:2016GeCoA.186..316G
1173:2013GGG....14.3844T
1058:2011PNAS..10820873L
1052:(52): 20873–20880.
976:1995Natur.378..571R
930:1995RvGeo..33..267R
887:1985GeCoA..49.1645R
801:1987JGR....9213981R
742:Sul Ross University
705:1983Geo....11..352R
594:2012PNAS..10919873D
588:(49): 19873–19875.
451:Geochemical Society
437:Harry H. Hess Medal
315:Research and career
263:Rudnick grew up in
98:Harry H. Hess Medal
1181:10.1002/ggge.20238
336:Harvard University
293:Stuart Ross Taylor
291:. Her supervisor,
237:Roberta L. Rudnick
203:Stuart Ross Taylor
160:Harvard University
42:Roberta L. Rudnick
16:American geologist
1474:Hofmann, Albrecht
1425:"Roberta Rudnick"
970:(6557): 571–578.
938:10.1029/95rg01302
387:Awards and honors
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106:Scientific career
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