Welcome to Alan Rubin's home page

at the

Institute of Geophysics and Planetary Physics, UCLA

Ruben 

Recent Research

            My research is focused on four principal areas that are not mutually exclusive:

 

(1) Understanding why the different chondrite groups differ in texture, mineralogy, bulk chemistry and bulk O-isotopic compositions.

            Recent papers addressing this topic include:

 

     Rubin A. E., Huber H. and Wasson J. T. (2009) Possible impact-induced refractory-lithophile fractionations in EL chondrites. Geochim. Cosmochim. Acta 73, 1523-1537.

     Rubin A. E. (2010) Physical properties of chondrules in different chondrite groups: Implications for multiple melting events in dusty environments. Geochim. Cosmochim. Acta 74, 4807-4828.

     Rubin A. E. (2011) Origin of the differences in refractory-lithophile-element abundances among chondrite groups. Icarus 213, 547-558.   

 

(2) Constraining the origin of chondrules and other primitive materials.

            Recent papers addressing this topic include:

 
     Rubin A. E. and Wasson J. T. (2005) Non-spherical lobate chondrules in CO3.0 Y-81020: General implications for the formation of low-FeO porphyritic chondrules in CO chondrites.  Geochim. Cosmochim. Acta 69, 211-220.

     Rubin A. E., Griset C. D., Choi B.-G. and Wasson J. T. (2009) Clastic matrix in EH3 chondrites. Meteorit. Planet. Sci. 44, 589-601.

     Rubin A. E. (2012) A new model for the origin of Type-B and Fluffy Type-A CAIs: Analogies to remelted compound chondrules. Meteorit. Planet. Sci., in press.

 

(3) Deducing the main mechanisms responsible for heating asteroids.

            Recent papers addressing this topic include:

 
     Rubin A. E. (2004) Post-shock annealing and post-annealing shock in equilibrated ordinary chondrites: Implications for the thermal and shock histories of chondritic asteroids. Geochim. Cosmochim. Acta 68, 673-689.

     Rubin A. E. and Wasson J. T. (2011) Shock effects in “EH6” enstatite chondrites and implications for collisional heating of the EH and EL parent asteroids. Geochim. Cosmochim. Acta 75, 3757-3780.

     Rubin A. E. and Swindle T. D. (2011) Flattened chondrules in the LAP 04581 LL5 chondrite: Evidence for an oblique impact into LL3 material and subsequent collisional heating.  Meteorit. Planet. Sci. 46, 587-600. 

 

(4) Describing features in chondrites that formed by such parent-body processes as aqueous alteration and shock metamorphism.

            Recent papers addressing this topic include:

 
     Rubin A. E., Trigo-Rodríguez J. M., Huber H. and Wasson J. T. (2007) Progressive aqueous alteration of CM carbonaceous chondrites. Geochim. Cosmochim. Acta 71, 2361-2382.

     Rubin A. E. (2008) Explicating the behavior of Mn-bearing phases during shock melting and crystallization of the Abee EH-chondrite impact-melt breccia. Meteorit. Planet. Sci. 43, 1481-1486.

     Rubin A. E. (2012) Collisional facilitation of aqueous alteration of CM and CV carbonaceous chondrites. Geochim. Cosmochim. Acta 90, 181-194.


Recent Publications


Warren P. H., Rubin A. E., Isa J., Brittenham S., Ahn I. and Choi B.-G. (2012) Northwest Africa 6693: A new type of FeO-rich achondrite with low D17O. Geochim. Cosmochim. Acta, submitted.

Rubin A. E. (2012) An amoeboid olivine inclusion (AOI) in CK3 NWA 1559 and the origin of AOIs in CK and CV chondrites. Meteorit. Planet. Sci., submitted.

Harju E. R., Rubin A. E., Choi B.-G., Ahn I., Ziegler K. and Wasson J. T. (2012) Progressive aqueous alteration of CR carbonaceous chondrites. Geochim. Cosmochim. Acta, submitted.  

Rubin A. E. (2012) Collisional facilitation of aqueous alteration of CM and CV carbonaceous chondrites. Geochim. Cosmochim. Acta, in press.

Rubin A. E. (2012) A new model for the origin of Type-B and Fluffy Type-A CAIs: Analogies to remelted compound chondrules. Meteorit. Planet. Sci., in press.

Hurt S. M., Rubin A. E. and Wasson J. T. (2012) Fractionated matrix composition in CV3 Vigarano and alteration processes on the CV parent asteroid. Meteorit. Planet. Sci., in press.

Nakamura-Messenger K., Clemett S. J., Rubin A. E., Choi B.-G., Zhang S., Rahman Z., Oikawa K. and Keller L. P. (2012) Wassonite: A new titanium monosulfide mineral in the Yamato 691 enstatite chondrite. Am. Mineral. 97, 807-815.

Rubin A. E. and Wasson J. T. (2011) Shock effects in “EH6” enstatite chondrites and implications for collisional heating of the EH and EL parent asteroids. Geochim. Cosmochim. Acta 75, 3757-3780.

Rubin A. E. and Swindle T. D. (2011) Flattened chondrules in the LAP 04581 LL5 chondrite: Evidence for an oblique impact into LL3 material and subsequent collisional heating.  Meteorit. Planet. Sci. 46, 587-600. 

Rubin A. E. and Moore W. B. (2011) What’s up? Preservation of gravitational direction in the LAR 06299 LL impact-melt breccia. Meteorit. Planet. Sci. 46, 737-747.

Rubin A. E. (2011) Origin of the differences in refractory-lithophile-element abundances among chondrite groups. Icarus 213, 547-558.   

Warren P. H. and Rubin A. E. (2010) Pigeonite-selective impact smelting in ureilites. Geochim. Cosmochim. Acta 74, 5109-5133.

Trigo-Rodríguez J. M., Llorca J., Madiedo J. M., Tancredo G., Edwards W. N., Rubin A. E. and Weber P. (2010) The Berduc L6 chondrite fall: Meteorite characterization, trajectory, and orbital elements.  Meteorit. Planet. Sci. 45, 383-393.

Rubin A. E. (2010) Physical properties of chondrules in different chondrite groups: Implications for multiple melting events in dusty environments. Geochim. Cosmochim. Acta 74, 4807-4828.

Rubin A. E. (2010) Impact melting in the Cumberland Falls and Mayo Belwa aubrites. Meteorit. Planet. Sci. 45, 265-275.

de Leuw S., Rubin A. E. and Wasson J. T. (2010) Carbonates in CM chondrites: Complex formational histories and comparison to carbonates in CI chondrites. Meteorit. Planet. Sci. 45, 513-530.

Choe W. H., Huber H., Rubin A. E., Kallemeyn G. W. and Wasson J. T. (2010) Compositions and taxonomy of 15 unusual carbonaceous chondrites. Meteorit. Planet. Sci. 45, 531-554.

Rubin A. E. and Grossman J. N. (2010) Meteorite and meteoroid: New comprehensive definitions. Meteorit. Planet. Sci. 45, 114-122.

Wasson J. T. and Rubin A. E. (2010) Matrix and whole-rock fractionations in the Acfer 094 type-3.0 ungrouped carbonaceous chondrite. Meteorit. Planet. Sci. 45, 73-90.

Wasson J. T. and Rubin A. E. (2010) Metal in CR chondrites. Geochim. Cosmochim. Acta 74, 2212-2230.

de Leuw S., Rubin A. E., Schmitt A. K. and Wasson J. T. (2009) 53Mn-53Cr systematics of carbonates in CM chondrites: Implications for the timing and duration of aqueous alteration. Geochim. Cosmochim. Acta 73, 7433-7442.

Rubin A. E. and Bottke W. F. (2009) On the origin of shocked and unshocked CM clasts in H-chondrite regolith breccias. Meteorit. Planet. Sci. 44, 701-724.

Rubin A. E., Griset C. D., Choi B.-G. and Wasson J. T. (2009) Clastic matrix in EH3 chondrites. Meteorit. Planet. Sci. 44, 589-601.

Rubin A. E. and Choi B.-G. (2009) Origin of halogens and nitrogen in enstatite chondrites. Earth Moon Planets 105, 41-53.

Trigo-Rodríguez J. M., Llorca J., Rubin A. E., Grossman J. N., Sears D. W. G., Naranjo M., Bretzius S., Tapia M. and Guarín Sepúlveda M. H. (2009) The Cali meteorite fall: A new H/L ordinary chondrite. Meteorit. Planet. Sci. 44, 211-220.

Wasson J. T. and Rubin A. E. (2009) Composition of matrix in the CR chondrite LAP 02342. Geochim. Cosmochim. Acta 73, 1436-1460.

Rubin A. E., Huber H. and Wasson J. T. (2009) Possible impact-induced refractory-lithophile fractionations in EL chondrites. Geochim. Cosmochim. Acta 73, 1523-1537.

Rubin A. E. (2008) Explicating the behavior of Mn-bearing phases during shock melting and crystallization of the Abee EH-chondrite impact-melt breccia. Meteorit. Planet. Sci. 43, 1481-1486.

Rubin A. E. and Matson R. D. (2008) Coincidental compositional and orbital correspondences among some ordinary chondrites: No strong evidence for meteoroid streams. Earth, Moon & Planets 103, 73-88.

Rubin A. E., Ziegler K. and Young E. D. (2008) Size scales over which ordinary chondrites and their parent asteroids are homogeneous in oxidation state and oxygen-isotopic composition. Geochim. Cosmochim. Acta 72, 948-958.

Rubin A. E. (2007) Petrography of refractory inclusions in CM2.6 QUE 97990 and the origin of melilite-free spinel inclusions in CM chondrites. Meteorit. Planet. Sci. 42, 1711-1726.

Rubin A. E. (2007) Petrogenesis of acapulcoites and lodranites: A shock-melting model. Geochim. Cosmochim. Acta 71, 2383-2401.

Rubin A. E., Trigo-Rodríguez J. M., Huber H. and Wasson J. T. (2007) Progressive aqueous alteration of CM carbonaceous chondrites. Geochim. Cosmochim. Acta 71, 2361-2382.

Huber H., Rubin A. E., Kallemeyn G. W. and Wasson J. T. (2006) Siderophile-element anomalies in CK carbonaceous chondrites: Implications for parent-body aqueous alteration and terrestrial weathering of sulfides. Geochim. Cosmochim. Acta 70, 4019-4037.

Rubin A. E. (2006) A relict-grain-bearing porphyritic olivine compound chondrule from LL3.0 Semarkona that experienced limited remelting. Meteorit. Planet. Sci. 41, 1027-1038.

Wasson J. T., Matsunami Y. and Rubin A. E. (2006) Silica and pyroxene in IVA irons; possible formation of the IVA magma by impact melting and reduction of L-LL-chondrite materials followed by crystallization and cooling. Geochim. Cosmochim. Acta 70, 3149-3172.

Huss G. R., Rubin A. E. and Grossman J. N. (2006) Thermal metamorphism in chondrites. pp. 567-586. In Meteorites and the Early Solar System II (ed. by D. Lauretta, L. A. Leshin and H. Y. McSween), Univ. Arizona Press, Tucson.

Ghosh A., Weidenschilling S. J., McSween H.Y. and Rubin A. (2006) Asteroidal heating and thermal stratification of the asteroid belt. pp. 555-566. In Meteorites and the Early Solar System II (ed. by D. Lauretta, L. A. Leshin and H. Y. McSween), Univ. Arizona Press, Tucson.

Rubin A. E. (2006) Shock, post-shock annealing and post-annealing shock in ureilites. Meteorit. Planet. Sci. 41, 125-133.

Trigo-Rodríguez J. M., Rubin A. E. and Wasson J. T. (2006) Non-nebular origin of dark mantles around chondrules and inclusions in CM chondrites. Geochim. Cosmochim. Acta 70, 1271-1290.

Jones R. H., Grossman J. N. and Rubin A. E. (2005) Chemical, mineralogical and isotopic properties of chondrules: Clues to their origin. In: Chondrites and the Protoplanetary Disk (ed. by A. N. Krot, E. R. D. Scott and B. Reipurth). Astronomical Society of the Pacific Conf. Series 341, 251-285.

Rubin A. E. (2005) Relationships among intrinsic properties of ordinary chondrites: Oxidation state, bulk chemistry, oxygen-isotopic composition, petrologic type and chondrule size. Geochim. Cosmochim. Acta 69, 4907-4918.

Rubin A. E. and Huber H. (2005) A weathering index for CK and R chondrites. Meteorit. Planet. Sci. 40, 1123-1130.

Kunihiro T., Rubin A. E. and Wasson J. T. (2005) Oxygen-isotopic compositions of low-FeO relicts in high-FeO host chondrules in Acfer 094, a type-3.0 carbonaceous chondrite closely related to CM.  Geochim. Cosmochim. Acta 69, 3831-3840.

Llorca J., Trigo-Rodríguez J. M., Ortiz J. L., Docobo J. A., Garcia-Guinea J., Castro-Tirado A. J., Rubin A. E., Eugster O., Edwards W., Laubenstein M. and Casanova I. (2005) The Villalbeto de la Peña meteorite fall: I. Fireball energy, meteorite recovery, strewn field and petrography.  Meteorit. Planet. Sci. 40, 795-804.

Rubin A. E., Trigo-Rodríguez J. M., Kunihiro T., Kallemeyn G. W. and Wasson J. T. (2005) Carbon-rich chondritic clast PV1 from the Plainview H-chondrite regolith breccia: Formation from H3 chondrite material by possible cometary impact. Geochim. Cosmochim. Acta 69, 3419-3430.

Rubin A. E. and Wasson J. T. (2005) Non-spherical lobate chondrules in CO3.0 Y-81020: General implications for the formation of low-FeO porphyritic chondrules in CO chondrites.  Geochim. Cosmochim. Acta 69, 211-220.

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Contact Information

    Alan E. Rubin

    Institute of Geophysics and Planetary Physics

   

    University of California

    Los Angeles, CA 90095-1567

 

       Telephone

    310-825-3202

       FAX

    310-206-3051

       Email

    aerubin@ucla.edu

 

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