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Alexander N. Krot Faculty

Alexander N. Krot
Researcher

Email: sasha@higp.hawaii.edu
Office: POST 516B
Phone Number: (808) 956-3900
Fax Number: (808) 956-6322

University of Hawai'i at Manoa
Hawai'i Institute of Geophysics and Planetology
1680 East-West Road, POST 602
Honolulu, HI 96822
USA


Research Interests:
Meteoritics, Cosmochemistry

Projects:
Astrophysical and cosmochemical problems related to the formation and early history of the Solar System; isotopic anomalies in chondritic meteorites; isotope chronology; petrogenesis of refractory inclusions, chondrules and matrices in primitive chondritic meteorites; redox conditions in the solar nebula; asteroidal and nebular alteration of chondritic components.

Relevant Links:

Publications (partial listing):

Wilson L., Bland P.A., Buczkowski D., Keil K., and Krot A.N. (2016) Hydrothermal and magmatic fluid flow in asteriods. Asteroids IV. in press <9617>

Keil K., Zucolotto M.E., Krot A.N., Doyle P.M., Tellus M., Krot T.V., Greenwood R.C., Franchi I.A., Wasson J.T., Welton K.C., Cafee M.W., Sears D.W.G., Riebe M., Wieler R., dos Santos E., Scorzelli R.B., Gattacceca J., Lagroix F., Laubenstein M., Mendes J.C., Schmitt-Koplin P., Harir M., and Moutinho A.L.R. (2015) The Vicencia meteorite fall: A new unshocked (S1) weakly metamorphosed (3.2) LL chondrite. Meteoritics and Planetary Science. in press <9424>

Nagashima K., Krot A.N., and Huss G.R. (2014) Oxygen-isotope compositions of chondrule phenocrysts and matrix grains in Kakangari K-grouplet. Geochimica et Cosmochimica Acta. in press <9245>

Nagashima K., Krot A.N., and Huss G.R. (2014) 26Al in chondrules from CR2 chondrites. Geochemical Journal. in press <9210>

Krot A.N., Park C., and Nagashima K. (2014) Amoeboid Olivine Aggregates from CH Carbonaceous Chondrites. Geochimica et Cosmochimica Acta, v. 139, p. 131-153, doi: 10.1016/j.gca.2014.04.050 <9122>

Takigawa A., Tachibana S., Huss G.R., Nagashima K., Makide K., Krot A.N., and Nagahara H. (2013) Morphology and crystal structures of solar and presolar Al2O3 in unequilibrated ordinary chondrites. http://dx.doi.org/10.1016/j.gca.2013.09.013. in press <9034>

Makide K., Nagashima K., Krot A.N., Huss G.R., Hutcheon I.D., Hellebrand E., and Petaev M.I. (2013) Heterogeneous distribution of Al at the birth of the Solar System: Evidence from corundum-bearing refractory inclusions in carbonaceous chondrites. Geochim. Cosmochim. Acta (2013), http://dx.doi.org/10.1016/j.gca.2013.01.028. in press <8888>

Krot A.N., Keil K., Scott E.R.D., Goodrich C.A., and Weisberg M.K. (2013) Classification of meteorites and their genetic relationships. In Meteorites, Comets and Planets (ed. A.M. Davis) Vol. 1, Treatise on Geochemical Second edition (eds. K.K. Turekian and H.D. Holland, Elsevier, Oxford, 2013. in press <8883>

Scott E.R.D. and Krot A.N. (2013) Chrondrites and their components. In Meteorites, Comets and Plantes (ed. A.M. Davis) Vol. 1, Treatise on Geochemistry Second edition(eds. K.K. Turekian and H.D. Holland), Elsevier, Oxford, 2013. in press <8882>

Ivanova M.A., Krot A.N., Nagashima K., and MacPherson G.J. (2012) Ultrarefractory inclusions from Efremovka and North West Africa 3118 CV carbonaceous chondrites. Mereoritics & Planetary Science, 2012. in press <8799>

Krot A.N., Nagashima K., Huss G.R., Ogliore, R.C., Ciesla F.J., Yang L., Hellebrand E., and Gaidos E. (2012) Heterogeneous distribution of Al at the birth of the solar system: Evidence from refractory grains and inclusions. Meteoritics & Planetary Science 1-33, doi:10.1111/maps.12008, 2012. in press <8776>

Wielandt D., Nagashima K., Krot A.N., Huss G.R., Ivanova M.A., and Bizzarro M. (2012) Evidence for multiple sources of Beryllium 10 in the early solar system. Astrophys. J. 748,L25. in press <8716>

Krot A.N., Nagashima K., and Petaev M.I. (2011) Isotopically uniform, O-depleted calcium, aluminum-rich inclusions in CH and CB carbonaceous chondrites. Geochim. Cosmochim. Acta, doi:10.1016/j.gca.2011.11.045, 2011. in press <8544>

Wasserburg G.J., Hutcheon I.D., Aleon J., Ramon E.C., Krot A.N., Nagashima K., and Brearley A.J. (2011) Extremely Na- and Cl-rich chondrule from the CV3 carbonaceous chondrite Allende. Geochim. Cosmochim. Acta, doi:10.1016/j.gca.2011.06.004, 2011. in press <8212>

Makide K., Nagashima K., Krot A.N., Huss G.R., Ciesla F.J., Hellebrand E., Gaidos E., and Yang L. (2011) Heterigenous Distribution of A1 at the Birth of the Solar System. The Astrophysical Journal Letters, 733,L31 (5pp), 2011. in press <8209>

Meibom A., Righter K., Chabot N., Dehn G., Antignano A., McCoy T.J., Krot A.N., Zolensky M.E., Petev M.I., and Keil K. (2004) Shock melts in QUE 94411, Hammada al Hamra 237, and Bencubbin: Remains of the missing matrix? Meteoritics & Planetary Science, 2005. in press <8106>

Bonal L., Huss G.R., Krot A.N., Nagashima K., Ishii H.A., and Bradley J.P. (2010) Highly 15N-enriched chondritic clasts in the Isheyevo meteorite. Geochimica Cosmochimica Acta. in press <7978>

Krot A.N., Nagashima K., Ciesla F.J., Meyer B.S., Hutcheon I.D., Davis A.M., Huss G.R., and Scott E.R.D. (2010) Oxygen isotopic composition of the sun and mean oxygen isotopic composition of the protosolar silicate dust: Evidence from refractory inclusions. The astrophysical journal, 713:1-8, 2010. doi:10.1088/0004-637X/713/1/1. <7912>

Krot A.N., Nagashima K., Yoshitake M., and Yurimoto H. (2009) Oxygen isotopic compostions of chondrules from the metal-rich chondrites Isheyevo (CH/CBb), MAC 02675 (CBb) and QUE 94627 (CBb). Geochim. Cosmchim. Acta., v. 74, p. 2190-2211, doi:10.1016/j.gca.2009.12.013.

Makide K., Nagashima K., Krot A.N., and Huss G.R. (2009) Oxygen Isotopic Compositions of Solar Corundum Grains. The American Astronomical Society, doi:10.1088/0004-637X/705/1/1

Rout S.S., Bischoff A., Nagashima K., Krot A.N., Huss G.R., and Keil K. (2009) Oxygen- and magnesium-isotope compositions of calcium-aluminum-rich inclusions from Rumuruti (R) chondrites. Geochim. Cosmochim. Acta, v. 73, p. 4264-4287. <7708>

I.D. Hutcheon, Marhas K.K., Krot A.N., Goswami J.N., and Jones R.H. (2009) Al in plagioclase-rich chondrules in carbonaceous chondrites: Evidence for an extended duration of chondrule formation. Geochim. Cosmochim. Acta, v. 73, p. 5080-5099, doi: 10.1016/j.gca.2009.04.042

Trinquier A., Elliott T., Ulfbeck D., Coath C., Krot A.N., and Bizzarro M. (2009) Origin of nucleosynthetic isotope heterogeneity in the solar proto-planetary disk. Science , v. 324, p. 374-376. <7734>

Makide K., Nagashima K., Krot A.N., Huss G.R., Hutcheon I.D., and Bischoff A. (2009) Oxygen- and magnesium-isotope compositions of calcium-aluminum-rich inclusions from CR2 carbonaceous chondrites. Geochim. Cosmochim. Acta, v. 73, p. 5018-5050. <7727>

Gaidos E., Krot A.N., WIlliams J.P., and Raimond S. (2009) Al-26 and the formation of the Solar System from a molecular cloud contaminated by Wolf-Rayet winds. The Astrophysical Journal, v. 696, p. 1854-1863. <7721>


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