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| | Journal (article/letter/editorial) | | Engineering, Lehigh University, Bethlehem. PA 18015. USA
(Received June 16, 1992; accepted in revisedjbrm...Widmanstatten
pattern of two iron
meteorites (Grant and Carlton) was studied using high spatial resolution analytical...because the martensite transformation
and subsequent decomposition during cooling of the meteorite occurs...- 13 to 14 wt% and is formed by
martensite decomposition
at martensite lath boundaries to a micro-structure...contains tetrataenite which forms by martensite decomposition
at
martensite lath boundaries and also within | 👁 Image
| | Journal (article/letter/editorial) | | study of the plessite
structure in the Carlton iron meteorite
L. S. LM, J. I. GOLDSTEINand D. B. WILLIAMS...the range of plessite structures observed
in the Carlton fine octahedrite. Compositional and structural...related to the formation of martensite and the further decomposition of martensite during the cooling history...history of the meteorite. It is quite probable that the martensite decomposition
reaction has occurred in...MASSALSKIet al. (1966). (1) y --) a + y or (2) y -+ u2 (martensite) below the M, temperature. The second transformation | 👁 Image
| | Journal (article/letter/editorial) | | 160 Governors Drive, Amherst, Massachusetts 01003, USA
2Materials Characterization Department, Sandia National...Box 5800, MS 0886, Albuquerque, New Mexico 87185, USA
*Corresponding author. E-mail: jig0@ecs.umass.edu...diffraction (EBSD)
analysis in five ataxites, the Carlton IAB-IIICD iron, and zoneless plessite metal in...which the α2 phase forms during cooling below the martensite start temperature, Ms, on the closepacked planes...tetrataenite regions at the
interfaces of prior α2 (martensite) laths, is the same as that of the single crystal | 👁 Image
| | Journal (article/letter/editorial) | | orientation and fine y rods in the decomposed martensite zone display both the
Nishiyama and Kurdjumov-Sachs...kamacite continue to be enriched in Ni.
When meteorite specimens are polished and etched
these taenite...Figure 2 shows a plessite region in the
Edmonton meteorite. The nonetching zones around
the edge of the plessite...I, (2) cloudy zone, (3) clear
taenite II, (4) martensite and (5) duplex u + y mix-
Tx.i~ cHrn~mBTIc
...in one of two
ways: (1) 7-a
+ y or (2) y--‘aZ (martensite) below
the M, temperature. The second transformation | 👁 Image
| | Journal (article/letter/editorial) | | supported by NSF grant EAR 76-01146.
THE SHAW METEORITE: EVIDENCE FOR AN IGNEOUS ORIGIN
J.L. Berkley...Johnson Space Center, Houston, TX 77058
The Shaw meteorite has Lgroup chondritic bulk chemistry and
mineralogy...somewhat variable from spot to spot, and that
martensite (13 to 15 wt % Ni, avg. 13.8%) is the dominant...former gas pockets in the melt.
The presence of martensite implies that the metal crystallized first as...C; the remaining
taenite began to transform to martensite at """ 380° C. A calculation of
kamacite growth | 👁 Image
| | Journal (article/letter/editorial) | | TREMORGIO (CANTON TICINO) AS A POSSIBLE
QUARTERNARY METEORITE IMPACT CRATER IN THE SWISS ALPS
Kurt Bachtiger...the author had, some years ago, the idea of a meteorite
impact crater in the Quarternary, i.e. 20-50,000...some interpretations will be attempted.
171
K
Meteorite
Type
(ppm)
johnstown
(whole rock)
Di
853...Total Ar 39_Ar40
age (G.Y.)
4.38
4.07
maximum
Meteorite
minimum
Bjurbole
4.12
3.46
3.96
3.98
1.62
...
An agglutinate is born when a primary micro-meteorite impact (velocity
- 20 km/sec) melts a little surface | 👁 Image
| | Book | | METEORITE RESEARCH
ASTROPHYSICS AND
SPACE SCIENCE LIBRARY
A SERIES OF BOOKS ON THE RECENT DEVELOPMENTS... Harvard College Observatory, Cambridge, Mass., USA
C. DE JAGER, University of Utrecht, Utrecht, Holland...NASA, Goddard Space Flight Center, Greenbelt, Md., USA
R. LUST, Institut fiir Extraterrestrische Physik...Calif. U.S.A.
H. E. NEWELL, NASA, Washington, D.C., USA
L. I. SEDOV, Academy of Sciences of the USSR, Moscow...Holland
VOLUME 12
METEORITE RESEARCH
PROCEEDINGS OF A SYMPOSIUM ON METEORITE RESEARCH
HELD IN VIENNA | 👁 Image
| | Book | | Scripta
Publishing
Company,
Washington,
DC
20005 USA.
Acta Chemica Scandinavica, 1947-, Munksgaard,
Noerre...Ohio 43214,
USA.
American Chemical Society, Journal, 1879-, Washington, DC 20036, USA.
American Crystallographic...Pennsylvania, USA.
American Journal of Science, 1818- Yale University,
New Haven, Connecticut 06520, USA.
PREFACE... PREFACE
1909 K Street NW, Washington, DC
20006, USA.
Arkiv for Mineralogi och Geologi, 1949-, Almqvist...
Journal.
British
Oklahoma, Norman, OK 73019, USA.
Contributions to Mineralogy and Petrology, Beitrage |
|
