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| Papike, J.J., Spilde, M.N., Fowler, G.W., Layne, G.D., Shearer, C.K. (1995) The Lodran primitive achondrite: petrogenetic insights from electron and ion microprobe analysis of olivine and orthopyroxene. Geochimica et Cosmochimica Acta, 59 (14) 3061-3070 doi:10.1016/0016-7037(95)00195-6 | Journal (article/letter/editorial) | | 50 + .OO
Pergamon
0016-7037( 95)00195-6
The Lodran primitive achondrite: Petrogenetic insights from...in revised form April 17, 1995 )
Abstract-The
Lodran primitive achondrite is thought to represent some...chondritic asteroids. Most researchers who studied Lodran believe that it is a restite from
which a melt...process is reflected
by a lack of feldspar in the Lodran mineral assemblage. Presumably, after or during...
The Lodran meteorite is a primitive achondrite that fell on
October I, 1868, in Multan, Punjab, Pakistan | 👁 Image
| | Journal (article/letter/editorial) | | Ahnandine, Namaqualand, anal., paragenesis, 347; Swat, Pakistan, anal., opt., 53; Sri Lanka, anal., 541 ; Central... 227 BIED (R. W.) and WASSON (J. T.), The Lodran meteorite and its relationship tc the urcilites, 721...Caledonite, X-ray powder data for, 536 Ca~on Diablo meteorite, disruption of, 827 CaO.2SiO2.EH~O, see Z-phase...natural refining, 247; The Avondale (New Zealand) meteorite discredited, 529 Chalybite, see Siderite (of Haidinger)...xanthophyIlite, 42 I Chimwadzuht Hill, Malawi, chromite, chlorite, peridotite, 695 Chiprovtsi ore deposit | 👁 Image
| | Journal (article/letter/editorial) | | SEPTEMBER I 9 7 6 , VOL. 40, PP- 7 2 1 - 3 5 The Lodran meteorite and its relationship to the ureilites R I...Angeles, CA 9oo24 SUMMARY.Lodran is a unique meteorite consisting of roughly equal amounts of metal,... and pyroxene with minor amounts of sulphide, chromite, phosphide, chrome-diopside, and a new phase with...compositional populations of chromite are found. A model for the formation of Lodran includes three steps: Formation...ureilites are similar to those in Lodran. In some respects Lodran appears to be a metal-rich ureilite | 👁 Image
| McCoy, T.J., Keil, K., Clayton, R.N., Mayeda, T.K., Bogard, D.D., Garrison, D.H., Wieler, R. (1997) A petrologic and isotopic study of lodranites: Evidence for early formation as partial melt residues from heterogeneous precursors. Geochimica et Cosmochimica Acta, 61 (3) 623-637 doi:10.1016/s0016-7037(96)00359-6 | Journal (article/letter/editorial) | | lodranites in an attempt to
constrain their genesis. Lodran, Gibson, Y-791491, Y-791493, Y-74357, Y-8002, Y-75274...and Wasson ( 1976)) it has
been recognized that Lodran is probably the residue of a
partially molten region...workers (e.g., Prior,
1916). Based on our criteria, Lodran, Gibson, Yamato
791491, Yamato 791493, Yamato 74357...following thin sections were studied: Gibson,
UH 192: Lodran, USNM 481-4; Yamato 791491, 61-2; Yamato
791493...Research; MAC, LEW, and
EET = Meteorite Working Group; FRO = European Meteorite
Group).
Several of the meteorites | 👁 Image
| | Journal (article/letter/editorial) | | Mineralogy of new Antarctic achondrites with affinity to Lodran
and a model of their evolution in an asteroid
HIROSHI...group of meteorites with an
affinity to Lodran (stony-iron meteorite) and their formation processes. This...coarse-grained orthopyroxene (Opx) and olivine as in Lodran and variable amounts of FeNi metal and troilite...etc. MAC88177 has more
augite and less FeNi than Lodran; Y74357 has more olivine and contains minor augite;...plagioclase, but one part is enriched in
Opx and chromite. The EET84302 and MAC88177 Opx crystals have dusty | 👁 Image
| | Journal (article/letter/editorial) | | clinopyroxene, plagioclase, metallic Fe,Ni, troilite, chromite and phosphates. Lodranites are coarser
grained...Bild and Wasson (1976) suggested that Lodran,
the type meteorite of the lodranites, resulted from partial...silicates and in the meteorite matrix (Herrin et al., 2005),
troilite, chromite and phosphates (e.g....strong evidence that the parent lithology of this meteorite clan
was chondritic (Fig. 3).
Systematic compositional...Icefield 031323
Meteorite Hills 01195**
Meteorite Hills 01198**
Meteorite Hills 01212**
Meteorite Hills 01232** | 👁 Image
| | Journal (article/letter/editorial) | | Adare meteorite, 352. Aegirine-trachyte from Angola, 66. Alkali lavas, 70. ~kmana meteorite, 173. Analcite...obituary. 392. Biotite-trachyte, Angola, 65. Bluff meteorite, 352. BaJJ~MALL(A.), elected member, xlviii. -...minerals, 831. 347, 354. Brito-aretic petl~graphic province~ 180, 219. BRowN (A. P.), obituary, 892. Baow/r...Nova Scotia, 340. Cbandak~pur meteorite, 352. ChAteau Renard meteorite, 352. Chemical analysis o'f meteorites...393. Crab Orchard meteorite, 167. Cracks in timber ~md clay, 329. Cronstad meteorite, 10. CaooxEs (Sir | 👁 Image
| Palme, H, Schultz, L, Spettel, B, Weber, H.W, Wänke, H, Michel-Levy, M.Christophe, Lorin, J.C (1981) The Acapulco meteorite: Chemistry, mineralogy and irradiation effects. Geochimica et Cosmochimica Acta, 45 (5) 727-752 doi:10.1016/0016-7037(81)90045-4 | Journal (article/letter/editorial) | | The Acapulco meteorite: chemistry, mineralogy and irradiation effects
H. PALME.L. SCXULTZ,B. SPETTEL...accepted in revisedform 14 January
1981)
Acapulco meteorite fell in August, 1976, at El Quemado, near Acapulco...mineral chemical data indicate formation of the meteorite under
AWra&--The
redox conditions intermediate...E- and H-chondrites, with some
Tfi~ ACAPULCO*meteorite fell on August 11, 1976 at
similarities to those...petrographical and minersimilar to Antarctic meteorite Allan Hiifs A 77081.
alogicai study (~1s~~~
MICHEL-LEVYand | 👁 Image
| McCoy, Timothy J., Corrigan, Catherine M., Dickinson, Tamara L., Benedix, Gretchen K., Schrader, Devin L., Davidson, Jemma (2019) Grove Mountains (GRV) 020043: Insights into acapulcoite-lodranite genesis from the most primitive member. Geochemistry, 79 (4) 125536 doi:10.1016/j.chemer.2019.125536 | Journal (article/letter/editorial) | | University, Bentley, WA, 6102, Australia
d
Center for Meteorite Studies, School of Earth and Space Exploration...subsequent overgrowths during metamorphism.
Keywords:
Meteorite
Chondrite
Acapulcoite
Melting
Asteroid
Mineralogy...recognition came from anomalous meteorites like Lodran (Bild and
Wasson, 1976) and Acapulco (Palme et...recognition of meteorites similar to
Acapulco and Lodran, establishment of acapulcoites and lodranites as...analyses
with totals between 98.5 and 101.5 wt.% and chromite analyses with
totals between 97.5 and 102.0 wt | 👁 Image
| Weigel, Andreas, Eugster, Otto, Koeberl, Christian, Michel, Rolf, Kr̈ahenb̈uhl, Urs, Neumann, Sonja (1999) Relationships among lodranites and acapulcoites: noble gas isotopic abundances, chemical composition, cosmic-ray exposure ages, and solar cosmic ray effects. Geochimica et Cosmochimica Acta, 63 (2) 175-192 doi:10.1016/s0016-7037(99)00012-5 | Journal (article/letter/editorial) | | (EET84302, FRO90011, Gibson, LEW86220,
LEW88280, Lodran, MAC88177, QUE93148, Y74357, Y791491) and four...of six
lodranites (EET84302, Gibson, LEW88280, Lodran, MAC88177, Y791491), are reported. Because existing...their petrological study that Lodran is a partially differentiated meteorite, which—to a great extent— has...reduction. Thus far the only chemical analysis of Lodran was
done by Fukuoka et al. (1978). The lack of...al. (1978) to classify Lodran as a primitive achondrite.
The Acapulco meteorite fell in 1976 on the outskirts | 👁 Image
| | Journal (article/letter/editorial) | | however, from the oxygen
inventory of other meteorite classes (Nagahara and Ozawa
1986; McCoy et al...the conclusion of previous
authors that this meteorite clan was generated by complex and
diverse processes...(1991). According to the latter authors, the meteorite is
composed mainly of orthopyroxene and olivine...accessory phosphates were observed.
Dho 125
This meteorite (Dho = Dhofar) was found in Oman on
the Arabian...place this
very heterogeneous, coarse-grained meteorite into a
transitional position (Field et al. 1993; | 👁 Image
| Mittlefehldt, David W., Lindstrom, Marilyn M., Bogard, Donald D., Garrison, Daniel H., Field, Stephen W. (1996) Acapulco- and Lodran-like achondrites: Petrology, geochemistry, chronology, and origin. Geochimica et Cosmochimica Acta, 60 (5) 867-882 doi:10.1016/0016-7037(95)00423-8 | Journal (article/letter/editorial) | |
SSDI 0016-7037(95)00423-S
AcapulcoDAVID
and Lodran-like
achondrites: Petrology,
chronology, and origin...but Acapulco-like),
and LEW
88280 and MAC 88 177 (Lodran-like)
. We have also performed 39Ar- 40Ar chronology...low temperature Fe-Ni-S
melt. In contrast, the Lodran-like
achondrites are
depleted in the highly incompatible...are consistent
with a model for formation of the Lodran-like achondrites as partial melting residues. However...However, the low
lr/Ni and high Se/Co ratios in two Lodran-like
achondrites suggest the metal + troilite in | 👁 Image
| | Journal (article/letter/editorial) | | more of the 160.rich component than any other meteorite. Bencubbin and Weatherford are also unusual in...relationship to the C2 carbonaceous
chondrites. Lodran and Enon are isotopicaUy similar to one another...be expected from their
representation in the meteorite collections [3]. It is
hoped that further studies...condensation and accretion of the planets and meteorite
parent bodies [4]. Materials which condensed in...silicates in iron and stonyiron meteorites
Class
Meteorite
Mineral
518 O
6 1 70
(%°)
(%0)
Pallasites | 👁 Image
| | Journal (article/letter/editorial) | | alteredcomposition. Udei Station appearsto be a IAB meteorite even though its FeO/(FeO + MgO) ratio
is slightly...slightly above the IAB tield. The highly weathered meteorite Tierra Blanca is closely related to IAB but
has...of an incomplete sam- signed to the IAB iron meteorite group, its silicate
inclusions are more oxidized...agree with our values
to within 10%.
sizes. The meteorite is heavily weathered and contains veins
of hematite/limonite...intermediate between Udei
Station (more reduced) and Lodran (more oxidized).
No O-isotope data are available | 👁 Image
| | Journal (article/letter/editorial) | | from most previous ones in using
untreated bulk meteorite fragments as starting materials, rather
than powders...with a small piece of the Canyon
Diablo iron meteorite at the target temperature and oxygen
fugacity...current of 20 nA
(olivine, pyroxene, apatite, chromite, metal, troilite and glass)
and 10 nA (feldspar...orthopyroxene, olivine,
clinopyroxene, apatite and chromite; Moffatt (1 987) for troilite;
and Carmichael(1989)...plagioclase, Apat = apatite, Mer = merrillite, Chr = chromite, Kam = kamacite, Tae = taenite, Troi = troilite | 👁 Image
| | Journal (article/letter/editorial) | | processes have been invoked previously for other meteorite groups. Rubin (2004) studied
210 equilibrated...blebs within silicate grains, chromite veinlets within silicate grains, chromite–plagioclase
assemblages,...counting system
using a step interval of 220 lm. Chromite and silicate compositions were determined with...1
Thin sections examined in the current study
Meteorite
Sections
Classification
Shock stage
ALH A77081...extinction indicative of shock-stage S5. The meteorite contains several fine-grained metal–troilite assemblages | 👁 Image
| | Journal (article/letter/editorial) | | chondrite. All properties are consistent with this meteorite having been recrystallized and
partially melted...i n e d mineralogic-chemical study of such a meteorite.
2. Experimental
Y a m a t o 74160 is a n e a...1-mm intervals.
Analyses of other minerals (e.g. chromite, Caphosphate, troilite and metal) were carried...tested previously
using Allende standard reference meteorite [13].
3. Results
3.1. Mineralogy and petrology...orthopyroxene, 29%;
augite, 9%; plagioclase, 8%; chromite, 3%; troilite,
2%; and Ca-phosphate, 0.5%. Ni-rich | 👁 Image
| | Journal (article/letter/editorial) | | composition, FeO/(FeO + Mg) ratio of the silicates, and chromite composition and
are possibly related to the IAB...members of this group (e.g. BUCHWALD,1975 and
chromite, ‘clinopyroxene and other accessories. Unlike...determined for the inclusion
applied to the entire meteorite. MAXJN (1967) proposed formation by injecting...1977).
Winona is classified as an anomalous stony meteorite (WASSON,1974) though published data show many...Woodbine were obtained by sawing
slices of the meteorite l-4 mm thick and breaking the melusions from the | 👁 Image
| | Journal (article/letter/editorial) | | 2 µm region (<2.1 µm for spinels, >2.1 µm for
chromite), while at longer wavelengths, spectral differences...petrogenetic information for remote spinel- and
chromite-bearing targets from analysis of their reflectance...minerals, specifically spinel, hercynite, and
chromite, are found in a wide range of terrestrial and...MgAl2O4-Fe2+Al2O4-Fe2+Cr2O4 (spinel-hercynite-chromite)
compositional space have been examined in conjunction...minerals, including
magnetite, spinel-hercynite, and chromite. Spinels frequently
accommodate extensive cation | 👁 Image
| | Journal (article/letter/editorial) | | where R = crate ring rate, m = moon, and p = meteorite parent body. In terms
of this relation, the above...cometary origin can be ruled out for all stony
meteorite classes that have gas-rich members. This includes...crystal from the Murchison meteorite.
A REINVESTIGATION OF THE LODRAN METEORITE
Richard W. Bild, John T...University of California Los Angeles, CA 90024.
The Lodran meteorite was described by Tschermak. He reported a...troilite, chromite, and some small rounded bodies that
might be plagioclase. zahringer found Lodran to be | 👁 Image
| Sunshine, Jessica M., Bus, Schelte J., McCoy, Timothy J., Burbine, Thomas H., Corrigan, Catherine M., Binzel, Richard P. (2004) High-calcium pyroxene as an indicator of igneous differentiation in asteroids and meteorites. Meteoritics & Planetary Science, 39 (8) 1343-1357 doi:10.1111/j.1945-5100.2004.tb00950.x | Journal (article/letter/editorial) | | spectra of well-characterized meteorites. To
link meteorite petrogenesis to asteroidal context, we must
seek...absorption features (Adams
1974; Burns 1993). Meteorite analyses show that chondritic
high-calcium pyroxene...theoretical basis for expecting asteroid and
meteorite differentiation to produce dramatic changes in...wide range of primitive chondrites. The
Acapulco meteorite is thought to have experienced minimal
silicate...powerful indicator of the igneous
history of a meteorite or asteroid.
Deriving HCP/(HCP + LCP) from Spectra | 👁 Image
| Dhaliwal, Jasmeet K., Day, James M.D., Corder, Christopher A., Tait, Kim T., Marti, Kurt, Assayag, Nelly, Cartigny, Pierre, Rumble, Doug, Taylor, Lawrence A. (2017) Early metal-silicate differentiation during planetesimal formation revealed by acapulcoite and lodranite meteorites. Geochimica et Cosmochimica Acta, 216. 115-140 doi:10.1016/j.gca.2017.06.042 | Journal (article/letter/editorial) | | isotopes for Acapulco, Allan Hills (ALHA) 81187, Meteorite Hills (MET) 01195, Northwest
Africa (NWA) 2871...isotope ratios of graphite grains in the archetype meteorite, Acapulco,
indicate distinct source compositions...several examples of paired meteorites (e.g., Meteorite Hills [MET] 01195 is paired with MET
01198 and...acapulcoites or lodranites, but
that are in fact other meteorite types (e.g., ureilite Miller Range 091004; Day...inaccessible. Additionally, among the Antarctic meteorite finds, a large fraction
(~60%) of the acapulcoites | 👁 Image
| | Journal (article/letter/editorial) | | clan
meteorites: Establishing S-type asteroid–meteorite connections
Michael P. LUCAS
1*
, Joshua P....asteroids offer the best possibility of linking meteorite
groups with their parent asteroid(s). Visible...and modal abundances of
olivine and pyroxene. Meteorite samples provide relationships between spectra...parent bodies. Stony meteorite spectra have previously
been used to delineate meteorite analog spectral zones...parameter space for the establishment of asteroid–meteorite connections with S-type
asteroids. However, the | 👁 Image
| Ulff-Møller, Finn, Rasmussen, Kaare L., Prinz, Martin, Palme, Herbert, Spettel, Bernhardt, Kallemeyn, Gregory W. (1995) Magmatic activity on the IVA parent body: Evidence from silicate-bearing iron meteorites. Geochimica et Cosmochimica Acta, 59 (22) 4713-4728 doi:10.1016/0016-7037(95)00318-5 | Journal (article/letter/editorial) | | range 1400-1350°C was inferred for the Steinbach meteorite from the estimated
distribution coefficient for...Group IVA is the third largest magmatic iron meteorite group, comprising fifty-six known meteorites....most of the meteorites in other magmatic iron
meteorite groups, at least four of the group IVA iron mete4713...Average analyses for pyroxenes,
tridymite, and chromite are shown in Table 1.
The INAA analyses were conducted...thirty-four
analyses of pyroxene, tridymite, metal, chromite, and sulfide from
Steinbach (the Rittersgrtin | 👁 Image
| | Book | | obtain a panorama of the scope and substance of
meteorite research. I endeavored to remedy this situation...not
exhaustively discussed—the great upsurge in meteorite research along
many new lines in recent years...and conservation of meteoritic material.
Every meteorite
is to some degree unique; and meteorites, unlike...I not been favored bv the curatorship of the meteorite collection
of The American Museum of Natural History...Chicago
Natural
History Museum, the Nininger Meteorite Collection (Arizona State
University, Tempe), |
|
