Roger Hewins

Professor II
Room 341 Wright Geological Laboratory
(732) 445-3232
hewins@rci.rutgers.edu

Education

• B.Sc., University of Aberdeen
• Ph.D., University of Toronto

Thin section of synthetic chondrule produced in the Rutgers furnace

Research Interests

Petrology of meteorites, experimental petrology, origin and early history of solar system. NASA grants support melting and crystallization studies on chondrules and normally provide one or two research assistanships for graduate students.
 

Chondrules reveal early solar system fractionation

Recent Publications

• E. J. Tronche, R. H. Hewins, and G. J. MacPherson (2007) Formation conditions of aluminum-rich chondrules. Geochim. Cosmochim. Acta 70, in press.
• Zanda B., R. H. Hewins, M. Bourot-Denise, P. A. Bland and F. Albarede (2006) Formation of Solar Nebula Reservoirs by Mixing Chondritic Components. Earth Planet. Sci. Lett. 248, 650-660.
• B. A. Cohen, S. Levasseur, B. Zanda, R. H. Hewins, and A. N. Halliday (2006) Kinetic isotope effect during reduction of iron from a silicate melt. Geochim. Cosmochim. Acta 70, 3139-3148.
• Cohen, B.A., Hewins, R.H. and Alexander, C.M.O'D. (2004) The formation of chondrules by open-system melting of nebular condensates.  Geochim. Cosmochim. Acta  68, 1661-1675. Download this paper
  
• B. A. Cohen and R. H. Hewins (2004) An experimental study of the formation of metallic iron in chondrules.  Geochim. Cosmochim. Acta  68, 1677-1689. Download this paper
  
• R. H. Hewins and G. E. Fox (2004)  Chondrule textures and precursor grain size: an experimental study. Geochim. Cosmochim. Acta  68, 917-925. Download this paper
  
• Yu Y., Hewins R.H., Alexander C.M.O’D. and Wang J. (2003) Experimental study of evaporation and isotopic mass fractionation of potassium in silicate melts. Geochim. Cosmochim. Acta 67, 773-786. Download this paper.
  
• S. Weinbruch, W. F. Müller, and Roger H. Hewins (2001) A transmission electron microscope study of exsolution and coarsening in iron-bearing clinopyroxene from synthetic analogues of chondrules. Meteoritics and Planet. Sci. 36, 1237-1428.
  
• B. A. Cohen, R. H. Hewins and Y. Yu (2000) Evaporation in the young solar nebula as the origin of "just-right" melting of chondrules. Nature 406, 600-602. Download this paper.
  
• C.M.O’D. Alexander, Grossman, J.N., J. Wang, B. Zanda, M. Bourot-Denise, and R. H. Hewins (2000) The lack of potassium isotopic fractionation in Bishunpur chondrules. Meteoritics and Planet. Sci. 35, 859-868. Download this paper.
  
• R.H. Hewins (2000) A stormy nebula In Meteorites: Their Impact on Science and History (2000) Edited by Brigitte Zanda and Monica Rotaru, Cambridge University Press, 128pp., 94-101.
  
• S.V. Maharaj and R.H. Hewins (1999) Simulating flash heating in a muffle tube furnace. Meteoritics & Planet. Sci. 34, 885-890.
  
• Weinbruch S. and Hewins R. H. (1999) Reply to comment by J. Paque, H.C. Connolly, and G.E. Lofgren on "On the lower limit of chondrule cooling rates: The significance of iron loss in dynamic crystallization experiments", Meteoritics & Planet. Sci. 34, 673-675.
  
• Connolly Jr., B.D. Jones and R.H. Hewins (1998) The flash melting of chondrules: an experimental investigation into the melting history and physical nature of chondrule precursors. Geochim. Cosmochim. Acta 62, 2725-2735. Download this paper.
  
• S.V. Maharaj and R.H. Hewins (1998) Chondrule precursor minerals as anhydrous phases. Meteoritics & Planet. Sci. 33, 881-887. Download this paper.
  
• Weinbruch S., Buttner H., Rosenhauer M. and Hewins R. H. (1998) On the lower limit of chondrule cooling rates, Meteoritics & Planet. Sci. 33, 65-74. Download this paper.
  
• Yu, Y., and Hewins, R.H. (1998) Transient heating and chondrule formation - evidence from Na loss in flash heating simulation experiments. Geochim. Cosmochim. Acta 62, 159-172. Download this paper.
  
• Hewins, R.H., Yu, Y., Zanda, B. and Bourot-Denise, M. (1997) Do nebular fractionations, evaporative losses, or both, influence chondrule compositions? Antarct. Met. Research 10, 294-317.
  
• R.H. Hewins (1997) Chondrules. Ann. Rev. Earth Planet. Sci. 25, 61-83.
  
• R.H. Hewins and Herzberg C.T. (1996) Nebular turbulence, chondrule formation, and the composition of the earth. Earth Planet. Sci. Lett. 144,1-7. Download this paper
  
• R.H. Hewins (1996) Une nebuleuse orageuse. In Les Météorites! (ed. B. Zanda) Editions Bordas, Paris, 94-101.
  
• R.H. Hewins and H.C. Connolly, Jr. (1996) Peak temperatures of flash-melted chondrules. In Chondrules and the Protoplanetary Disk (eds. R.H. Hewins, R.H. Jones and E.R.D. Scott) Cambridge University Press, 197-204.
  
• Connolly H.C. Jr. and Hewins R.H. (1996) Constraints placed on the nature of chondrule precursors. In Chondrules and the Protoplanetary Disk (eds. R.H. Hewins, R.H. Jones and E.R.D. Scott), Cambridge University Press, 129-135.
  
• R.H. Hewins (1996) Chondrules and the protoplanetary disk: an overview. In Chondrules and the Protoplanetary Disk (eds. R.H. Hewins, R.H. Jones, E.R.D. Scott), Cambridge University Press, 3-9.
  
• Yu Y., Hewins R.H., and Zanda B. (1996) Sodium and sulfur in chondrules: heating time and cooling curves. In Chondrules and the Protoplanetary Disk (eds. R.H. Hewins, R.H. Jones and E.R.D. Scott) Cambridge University Press, 213-219.
  
• H.C. Connolly Jr. and R.H. Hewins (1995) Chondrules as products of dust collisions with totally molten droplets within a dust-rich nebular environment: an experimental investigation. Geochim. Cosmochim. Acta 59, 3231-3246.
  
• Yu, Y., Hewins, R.H., Clayton, R.N. and Mayeda, T.K. (1995) Experimental study of high temperature oxygen isotope exchange during chondrule formation. Geochim. Cosmochim. Acta, 59, 2095-2104.
  
• Connolly, H.C. Jr., Hewins, R.H., Ash, R.D., Zanda, B., Lofgren, G.E. and . Bourot-Denise, M. (1994) Carbon and the formation of reduced chondrules: an experimental investigation. Nature, 371, 136-139.
  
• B. Zanda, M. Bourot-Denise, C. Perron and R.H. Hewins (1994) Origin and Metamorphic Redistribution of Silicon, Chromium and Phosphorus in the Metal of Chondrites. Science, 265, 1846-1849
• B. A. Cohen, S. Levasseur, B. Zanda, R. H. Hewins, A. N. Halliday and F. Robert (2005) Kinetic isotope effect during reduction of iron from a silicate melt. Geochim. Cosmochim. Acta 70, submitted.
  
• R. H. Hewins, H. C. Connolly Jr., G. E. Lofgren, and G. Libourel (2005) Experimental constraints on chondrule origins. Proceedings of Workshop on Chondrites and the Protoplanetary Disk. In Proceedings of the Astrophysical Society of the Pacific Conference Series 341, 286-316.
  
• G. E. Fox and R. H. Hewins (2005) Chondrule recycling experiments and relict olivine. Geochim. Cosmochim. Acta 69, 2441-2449. Download this paper