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Titre du document / Document title

The fall, recovery, orbit, and composition of the Tagish Lake Meteorite : A new type of carbonaceous chondrite

Auteur(s) / Author(s)

BROWN Peter G. (1) ; HILDEBRAND Alan R. (2) ; ZOLENSKY Michael E. (3) ; GRADY Monica (4) ; CLAYTON Robert N. (5) ; MAYEDA Toshiko K. (5) ; TAGLIAFERRI Edward (6) ; SPALDING Richard (7) ; MACRAE Neil D. (8) ; HOFFMAN Eric L. (9) ; MITTLEFEHLDT David W. (10) ; WACKER John F. (11) ; BIRD J. Andrew (2) ; CAMPBELL Margaret D. (1) ; CARPENTER Robert (8) ; GINGERICH Heather (8) ; GLATIOTIS Michael (2) ; GREINER Erika (8) ; MAZUR Michael J. (2) ; MCCAUSLAND Phil Ja. (8) ; PLOTKIN Howard (12) ; MAZUR Tina Rubak (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, CANADA
(2) Department of Geology and Geophysics, University of Calgary, Calgary, Alberta T2N 1N4, CANADA
(3) SN2, NASA Johnson Space Center, Houston, TX 77058, ETATS-UNIS
(4) Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, ROYAUME-UNI
(5) Enrico Fermi Institute, Department of Chemistry, and Department of Geophysical Sciences, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, ETATS-UNIS
(6) ET Space Systems, 5990 Worth Way, Camarillo, CA 93012, ETATS-UNIS
(7) Sandia National Laboratories, Organization 5909, Mail Stop 0978, Post Office Box 5800, Albuquerque, NM 87185, ETATS-UNIS
(8) Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, CANADA
(9) Activation Laboratories Ltd., 1336 Sandhill Drive, Ancaster, Ontario L9G 4V5, CANADA
(10) Lockheed Martin SO, Houston, TX 77058, ETATS-UNIS
(11) Pacific Northwest National Laboratory, Post Office Box 999, Richland, WA 99352, ETATS-UNIS
(12) Department of Philosophy, University of Western Ontario, London, Ontario N6A 3K7, CANADA

Résumé / Abstract

The preatmospheric mass of the Tagish Lake meteoroid was about 200,000 kilograms. Its calculated orbit indicates affinity to the Apollo asteroids with a semimajor axis in the middle of the asteroid belt, consistent with a linkage to low-albedo C, D, and P type asteroids. The mineralogy, oxygen isotope, and bulk chemical composition of recovered samples of the Tagish Lake meteorite are intermediate between CM and CI meteorites. These data suggest that the Tagish Lake meteorite may be one of the most primitive solar system materials yet studied.

Revue / Journal Title

Science    ISSN  0036-8075   CODEN SCIEAS 

Source / Source

2000, vol. 290, no5490, pp. 320-325

Langue / Language

Anglais

Editeur / Publisher

American Association for the Advancement of Science, Washington, DC, ETATS-UNIS  (1880) (Revue)

Mots-clés anglais / English Keywords

meteorites

;

carbonaceous chondrites

;

mineral assemblages

;

stable isotopes

;

O-18

;

chemical composition

;

petrography

;

scanning electron microscopy

;

SEM data

;

chemical analysis

;

rare earths

;

chondrites

;

stony meteorites

;

Mots-clés français / French Keywords

Météorite

;

Chondrite carbonée

;

Association minérale

;

Isotope stable

;

O 18

;

Composition chimique

;

Pétrographie

;

Microscopie électronique balayage

;

Donnée MEB

;

Analyse chimique

;

Terre rare

;

Météorite Lac Tagish

;

Taku Arm

;

Orbite

;

Chondrite

;

Météorite pierreuse

;

Mots-clés espagnols / Spanish Keywords

Meteorito

;

Condrita carbonada

;

Asociación mineral

;

Isótopo estable

;

O 18

;

Petrografía

;

Dato MEB

;

Análisis químico

;

Tierras raras

;

Condrita

;

Meteorito piedra

;

Localisation / Location

INIST-CNRS, Cote INIST : 6040, 35400009263667.0120

Nº notice refdoc (ud4) : 810774



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