J
J. Van Orman
Researcher at Case Western Reserve University
Publications - 9
Citations - 524
J. Van Orman is an academic researcher from Case Western Reserve University. The author has contributed to research in topics: Mantle (geology) & Forsterite. The author has an hindex of 6, co-authored 9 publications receiving 461 citations. Previous affiliations of J. Van Orman include Carnegie Institution for Science.
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Journal ArticleDOI
Experimentally determined postspinel transformation boundary in Mg2SiO4 using MgO as an internal pressure standard and its geophysical implications
Yingwei Fei,J. Van Orman,J. Van Orman,Jie Li,Jie Li,W. van Westrenen,W. van Westrenen,Chrystele Sanloup,Chrystele Sanloup,William G. Minarik,Kei Hirose,Tetsuya Komabayashi,Michael J. Walter,Ken-ichi Funakoshi +13 more
TL;DR: In this article, the postspinel transformation boundary in Mg2SiO4 was determined by combining quench technique with in situ pressure measurements, using multiple internal pressure standards including Au, MgO, and Pt.
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Prolonged magmatism on 4 Vesta inferred from Hf–W analyses of eucrite zircon
J. Roszjar,J. Roszjar,Martin J. Whitehouse,G. Srinivasan,Klaus Mezger,Erik E. Scherer,J. Van Orman,Addi Bischoff +7 more
TL;DR: In this paper, a chronology of individual zircon grains from six basaltic eucrites was used to study the early thermal history of the asteroid 4 Vesta.
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Substitution and diffusion of Cr 2+ and Cr 3+ in synthetic forsterite and natural olivine at 1200–1500 °C and 1 bar
Michael C. Jollands,Michael C. Jollands,H. St. C. O'Neill,J. Van Orman,Andrew J. Berry,Jörg Hermann,Jörg Hermann,M. Newville,A. Lanzirotti +8 more
TL;DR: The diffusion and substitution mechanisms of Cr in forsterite were studied as a function of crystallographic orientation and the chemical potentials of all four components in the system MgO-SiO2-Cr-O as discussed by the authors.
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Polymorphic phase transition in Superhydrous Phase B
TL;DR: In this article, the authors synthesized superhydrous phase B (shy-B) at 22 GPa and two different temperatures: 1200°C (LT) and 1400°C(HT) using a multi-anvil apparatus.
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Modeling viscosity of (Mg,Fe)O at lowermost mantle conditions
TL;DR: In this paper, a 2.5-dimensional dislocation dynamics approach is employed to model the viscosity of the lower mantle of aluminous (Mg,Fe)SiO_3 bridgmanite and ferropericlase.