Condensation of refractory minerals on igneous compact type A Ca-Al-rich inclusion from Northwest Africa 7865 CV chondriteOPEN ACCESS
Akimasa Suzumura, Noriyuki Kawasaki, Hisayoshi Yurimoto, Shoichi Itoh MAPS, Version of Record online: 03 June 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “A melilite-rich, compact type A Ca-Al-rich inclusion (CAI), KU-N-02, from the reduced CV3 chondrite…
Ultra-refractory metal assemblages in calcium-aluminum-rich inclusions: Probes of the inner solar protoplanetary disk
Tarunika Ramprasad, Venkateswara Rao Manga, Laura B. Seifert, Prajkta Mane, Thomas J. Zega Geochimica et Cosmochimica ActaAvailable online 25 April 2024 LINK “Calcium-aluminum-rich inclusions (CAIs) are the first formed solids in our solar system. Information…
Mineralogical alteration of a type A CAI from Allende CV3 chondrite: Formation of secondary dmisteinbergite and its phase transition to anorthiteOPEN ACCESS
Yuma Enokido, Tomoki Nakamura, Megumi Matsumoto, Akira Miyake, Takazo Shibuya, Changkun Park, Mike Zolensky MAPSVersion of Record online: 24 February 2023 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “Dmisteinbergite, a hexagonal form of CaAl2Si2O8, was found in…
A petrologic and microstructural study of a compact type A calcium-aluminum-rich inclusion from the Northwest Africa 5028 CR2 chondrite: Implications for nebular and parent-body processes
Tarunika Ramprasad, Pierre Haenecour, Kenneth Domanik, Thomas J. Zega MAPSVersion of Record online: 22 September 2022 LINK “Compact type A calcium-aluminum-rich inclusions (CTA CAIs) are believed to have experienced partial melting that erased all information…
The Formation of Type B CAIs: Evolution from Type A CAIs
G.J. MacPherson, A.N. Krot, N.T. Kita, E.S. Bullock, K. Nagashima, T. Ushikubo, M.A.Ivanova Geochimica et Cosmochimica ActaAvailable online 7 January 2022 LINK “Five Type A CAIs from three CV3 chondrites (Vigarano, Northwest Africa 3118, Allende),…
Beckettite, Ca2V6Al6O20, a new mineral in a Type A refractory inclusion from Allende and clues to processes in the early solar system
Chi Ma, Alexander N. Krot, Julie Paque, Oliver Tschauner, Kazuhide Nagashima Meteoritics & Planetary ScienceVersion of Record online: 07 December 2021 LINK “Beckettite (Ca2V6Al6O20; IMA 2015-001) is a newly discovered refractory mineral, occurring as micrometer-sized…
Oxygen and Al-Mg isotopic constraints on cooling rate and age of partial melting of an Allende Type B CAI, Golfball
Noriyuki Kawasaki, Shoichi Itoh, Naoya Sakamoto, Steven B. Simon, Daiki Yamamoto, Hisayoshi Yurimoto Meteoritics & Planetary ScienceVersion of Record online: 07 July 2021 LINK “Coarse-grained, igneous Ca-Al-rich inclusions (CAIs) in CV chondrites formed through multiple…
Origin of minerals in åkermanite-rich patch texture and oxygen isotopic evolution of compact Type A Ca-Al-rich inclusions from the Northwest Africa 7865 CV chondrite
UPDATE (29 August 2023): Corrigendum to “Origin of minerals in åkermanite-rich patch texture and oxygen isotopic evolution of compact Type A Ca-Al-rich inclusions from the Northwest Africa 7865 CV chondrite” [Geochim. Cosmochim. Acta 303 (2021)…
Structure of type A CAI-like melts: A view from multi-nuclear NMR study of melilite (Ca2Al2SiO7-Ca2MgSi2O7) glasses
Sun Young Park, Changkun Park, Hyun Na Kim, Seoyoung Lee, Sung Keun Lee Chemical GeologyIn Press, Journal Pre-proof, Available online 16 September 2020 LINK “Highlights • The coordination number of Al in melilite glasses and…
MINERALOGY, PETROGRAPHY, AND OXYGEN ISOTOPIC COMPOSITIONS OF ULTRAREFRACTORY INCLUSIONS FROM CARBONACEOUS CHONDRITES
A.N. Krot, C. Ma, K. Nagashima, A.M. Davis, J.R. Beckett, S.B. Simon, M. Komatsu, T.J. Fagan, F. Brenker, M.A. Ivanova, A.Bischoff Geochemistry Available online 15 August 2019 LINK “We report on the mineralogy, petrography, and…
Variations in initial 26Al/27Al ratios among fluffy Type A Ca–Al-rich inclusions from reduced CV chondrites
Noriyuki Kawasaki, Changkun Park, Naoya Sakamoto, Sun Young Park, Hyun Na Kim, Minami Kuroda, Hisayoshi Yurimoto Earth and Planetary Science Letters Volume 511, 1 April 2019, Pages 25-35 LINK “Highlights • We obtained Al–Mg mineral…
Evidence for oxygen-isotope exchange in refractory inclusions from Kaba (CV3.1) carbonaceous chondrite during fluid-rock interaction on the CV parent asteroidOPEN ACCESS
Alexander N. Krot, Kazuhide Nagashima, Krisztián Fintor, Elemér Pál-Molnár Geochimica et Cosmochimica Acta LINK (OPEN ACCESS) PDF (OPEN ACCESS) “We report on the mineralogy, petrology, and in situ measured oxygen-isotope compositions of three Fluffy Type…
Closed system oxygen isotope redistribution in igneous CAIs upon spinel dissolution
Jérôme Aléon Earth and Planetary Science Letters Volume 482, 15 January 2018, Pages 324–333 LINK “Highlights • Pyroxene in most igneous CAIs becomes 16O-enriched during crystallization. • O isotopes in type A, type B and…
Oxygen, Magnesium, and Aluminum Isotopes in the Ivuna CAI: Re-Examining High-Temperature Fractionations in CI Chondrites
Frank D. R. * Huss G. R. Nagashima K. Zolensky M. E. Le L. 80th Annual Meeting of the Meteoritical Society 2017 [#6355] abstract (PDF) “The only whole CAI preserved in the aqueously altered CI…
Beryllium-Boron Systematics of Two Distinctive CAIs from CV3 Chondrites: The Relatively Pristine CAI B4 from NWA 6991 and the FUN CAI CMS-1 from Allende
E. Dunham, M. Wadhwa, S. J. Desch 48th Lunar and Planetary Science Conference (2017), Abstract #1507 LINK
Al-Mg Systematics of Nebular Condensates in the Efremovka CV3 Chondrite
N. Kawasaki, H. Yurimoto 48th Lunar and Planetary Science Conference (2017), Abstract #1091 LINK
The initial 41Ca/40Ca ratios in two Type A Ca-Al-rich Inclusions: Implications for the origin of short-lived 41Ca
Ming-Chang Liu Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 26 October 2016 LINK “This paper reports new 41Ca-41K isotopic data for two Type A CAIs, NWA 3118 #1Nb (Compact Type A) and…
Calcium-aluminum-rich inclusions with fractionation and unidentified nuclear effects (FUN CAIs): II. Heterogeneities of magnesium isotopes and 26Al in the early Solar System inferred from in situ high-precision magnesium-isotope measurements
Changkun Park, Kazuhide Nagashima, Alexander N. Krot, Gary R. Huss, Andrew M. Davis, Martin Bizzarro Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 8 October 2016 LINK “Calcium-aluminum-rich inclusions with isotopic mass fractionation…
Rare earth element measurements and mapping of minerals in the Allende CAI, 7R19-1, by NanoSIMS ion microprobe.
Ito, M. and Messenger, S. Meteoritics & Planetary Science. doi: 10.1111/maps.12623 LINK “We have established analytical procedures for quantitative rare earth element (REE) measurements by NanoSIMS 50L ion microprobe with 2–10 μm spatial resolution. Measurements…
Oxygen isotopes in the early protoplanetary disk inferred from pyroxene in a classical type B CAI
Jérôme Aléon Earth and Planetary Science Letters Volume 440, 15 April 2016, Pages 62–70 doi:10.1016/j.epsl.2016.02.007 LINK “A major unanswered question in solar system formation is the origin of the oxygen isotopic dichotomy between the Sun…
Genetic Link Between Fluffy Type A, Compact Type A and Type B CAIs from CV3 Chondrites NWA 3118 and Efremovka
M. A. Ivanova, A. N. Krot, G. J. MacPherson 46th Lunar and Planetary Science Conference (2015), Abstract #2371 PDF LINK