Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Re-Os Ages of Group IIA, IIIA, IVA, and IVB Iron Meteorites
19961.2k citationsR. J. Walker, John W. Morgan et al.Scienceprofile →
THE Re-OsISOTOPE SYSTEM IN COSMOCHEMISTRY AND HIGH-TEMPERATURE GEOCHEMISTRY
This map shows the geographic impact of R. J. Walker's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by R. J. Walker with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites R. J. Walker more than expected).
This network shows the impact of papers produced by R. J. Walker. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by R. J. Walker. The network helps show where R. J. Walker may publish in the future.
Co-authorship network of co-authors of R. J. Walker
This figure shows the co-authorship network connecting the top 25 collaborators of R. J. Walker.
A scholar is included among the top collaborators of R. J. Walker based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with R. J. Walker. R. J. Walker is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
McCoy, T. J., C. M. Corrigan, K. Nagashima, et al.. (2017). Milton and the South Byron Trio: An Oxidized Parent Body with an Outside-In Crystallizing Core. LPI. 2241.1 indexed citations
7.
Bermingham, K. R., et al.. (2016). Correlated Nucleosynthetic Anomalies in Mo, Ru, and Pd from Iron Meteorites. Lunar and Planetary Science Conference. 2055.3 indexed citations
8.
Worsham, E. A. & R. J. Walker. (2015). Molybdenum Isotope Evidence for Diverse Genetics Among IAB Iron Meteorite Complex Subgroups. LPI. 2524.1 indexed citations
9.
Walker, R. J., et al.. (2015). Memories of Earth Formation in the Modern Mantle: W Isotopic Composition of Flood Basalt Lavas. AGU Fall Meeting Abstracts. 2015.4 indexed citations
10.
Touboul, M., Igor S. Puchtel, R. J. Walker, et al.. (2013). Early mantle composition and evolution inferred from 142Nd and 182W variation in Isua samples. AGU Fall Meeting Abstracts. 2013.1 indexed citations
11.
Kruijer, T. S., M. Touboul, Mario Fischer‐Gödde, et al.. (2013). Resolution of Small Differences in the Time of Metal Segregation in Iron Meteorite Parent Bodies. Lunar and Planetary Science Conference. 1920.1 indexed citations
12.
Bermingham, K. R., R. J. Walker, Igor S. Puchtel, & Brian O’Driscoll. (2013). Probing terrestrial mantle evolution using Ru isotopes. AGU Fall Meeting Abstracts. 2013.1 indexed citations
13.
Iizuka, Tsuyoshi, Y. Amelin, Igor S. Puchtel, et al.. (2013). U-Pb age, Re-Os isotopes, and HSE Geochemistry of Northwest Africa 6704. Lunar and Planetary Science Conference. 1841.1 indexed citations
14.
Walker, R. J., Igor S. Puchtel, A. D. Brandon, & A. J. Irving. (2008). Highly Siderophile Elements Abundances in SNC Meteorites: An Update. LPICo. 1401. 107–108.4 indexed citations
15.
Yokoyama, Tetsuya, C. M. O'd. Alexander, & R. J. Walker. (2008). Osmium Isotopic Anomalies of Insoluble Organic Matter in Chondrites. LPI. 1376.2 indexed citations
16.
Walker, R. J., W. F. McDonough, N. L. Chabot, et al.. (2008). Modeling fractional crystallization of group IVB iron meteorites. DSpace Repository (Smithsonian). 1195.1 indexed citations
17.
Lee, Seung Ryeol, J. Wright Horton, & R. J. Walker. (2005). Osmium-Isotope and Platinum-Group-Element Systematics of Impact-Melt Rocks, Chesapeake Bay Impact Structure, Virginia, USA. 36th Annual Lunar and Planetary Science Conference. 1700.1 indexed citations
18.
Walker, R. J., et al.. (1999). Comparative Re-Os Isotope Systematics of Chondrites: Implications Regarding Early Solar System Processes. Lunar and Planetary Science Conference. 1208.2 indexed citations
19.
Morgan, John W., R. J. Walker, & J. N. Grossman. (1990). Rhenium-Osmium Isotope Systematics in Enstatite Chondrites. LPI. 21. 809.4 indexed citations
20.
Walker, R. J. & J. J. Papike. (1982). The Apollo 15 regolith - Comparative petrology of drive tube 15010/15011 and drill core section 15003. Lunar and Planetary Science Conference. 12. 485–508.4 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.