T
Timothy J. Fagan
Researcher at Waseda University
Publications - 36
Citations - 892
Timothy J. Fagan is an academic researcher from Waseda University. The author has contributed to research in topics: Chondrite & Olivine. The author has an hindex of 15, co-authored 36 publications receiving 834 citations. Previous affiliations of Timothy J. Fagan include Smithsonian Institution & Tokyo Institute of Technology.
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Journal ArticleDOI
Amoeboid olivine aggregates and related objects in carbonaceous chondrites: records of nebular and asteroid processes
Alexander N. Krot,Michail I. Petaev,Sara S. Russell,Shoichi Itoh,Shoichi Itoh,Timothy J. Fagan,Timothy J. Fagan,Hisayoshi Yurimoto,Lysa J. Chizmadia,Michael K. Weisberg,Michael K. Weisberg,Matsumi Komatsu,Alexander A Ul'yanov,Klaus Keil +13 more
TL;DR: Amoeboid olivine aggregates (AOAs) are the most common type of refractory inclusions in CM, CR, CH, CV, CO, and ungrouped carbonaceous chondrites Acfer 094 and Adelaide.
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Refractory calcium‐aluminum‐rich inclusions and aluminum‐diopside‐rich chondrules in the metal‐rich chondrites Hammadah al Hamra 237 and Queen Alexandra Range 94411
Alexander N. Krot,Kevin D. McKeegan,Sara S. Russell,Anders Meibom,Michael K. Weisberg,Jutta Zipfel,Tatiana V. Krot,Timothy J. Fagan,Klaus Keil +8 more
TL;DR: The metal-rich chondrites Hammadah al Hamra (HH) 237 and Queen Alexandra Range (QUE) 94411, paired with QUE 94627, contain relatively rare (<1 vol%) calcium-aluminum-rich inclusions (CAIs) and Al-diopside rich chondrules as mentioned in this paper.
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Northwest Africa 032: Product of lunar volcanism
Timothy J. Fagan,G. J. Taylor,Klaus Keil,Ted E. Bunch,James H. Wittke,Randy L. Korotev,Bradley L. Jolliff,Jeffrey J. Gillis,Larry A. Haskin,Eugene Jarosewich,Robert N. Clayton,Toshiko K. Mayeda,Vera A. Fernandes,Ray Burgess,Grenville Turner,Otto Eugster,Silvio Lorenzetti +16 more
TL;DR: In this article, geochemical signatures taken together indicate unambiguously that NWA 032 originated from the Moon, including whole-rock oxygen isotopic composition and ratios of Fe:Mn in the whole rock, olivine and pyroxene.
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Ca,Al-rich inclusions, amoeboid olivine aggregates, and Al-rich chondrules from the unique carbonaceous chondrite Acfer 094: I. mineralogy and petrology
Alexander N. Krot,Timothy J. Fagan,Klaus Keil,Kevin D. McKeegan,S. Sahijpal,Ian D. Hutcheon,M. I. Petaev,Hisayoshi Yurimoto +7 more
TL;DR: In this paper, the authors investigated the refractory inclusions in the Acfer 094 carbonaceous chondrite and found that they can be divided into corundum-rich and amoeboid olivine aggregates.
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Northwest Africa 773: Lunar origin and iron-enrichment trend
Timothy J. Fagan,G. J. Taylor,Klaus Keil,T. L. Hicks,M. Killgore,Ted E. Bunch,James H. Wittke,David W. Mittlefehldt,Robert N. Clayton,Toshiko K. Mayeda,Otto Eugster,Silvio Lorenzetti,Marc D. Norman +12 more
TL;DR: The meteorite Northwest Africa 773 (NWA 773) is a lunar sample with implications for the evolution of mafic magmas on the moon as mentioned in this paper, which is composed of two distinct lithologies: a two-pyroxene olivine gabbro with cumulate texture, and a polymict, fragmental regolith breccia.