Piers Koefoed

664 total citations
32 papers, 369 citations indexed

About

Piers Koefoed is a scholar working on Astronomy and Astrophysics, Geophysics and Ecology. According to data from OpenAlex, Piers Koefoed has authored 32 papers receiving a total of 369 indexed citations (citations by other indexed papers that have themselves been cited), including 25 papers in Astronomy and Astrophysics, 12 papers in Geophysics and 6 papers in Ecology. Recurrent topics in Piers Koefoed's work include Astro and Planetary Science (24 papers), Planetary Science and Exploration (16 papers) and Geological and Geochemical Analysis (9 papers). Piers Koefoed is often cited by papers focused on Astro and Planetary Science (24 papers), Planetary Science and Exploration (16 papers) and Geological and Geochemical Analysis (9 papers). Piers Koefoed collaborates with scholars based in United States, China and Australia. Piers Koefoed's co-authors include Kun Wang, Yuri Amelin, Tsuyoshi Iizuka, Qing‐Zhu Yin, Zhen Tian, M. E. Sanborn, Heng Chen, Wenshuai Li, Anthony J. Irving and K. Lodders and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Geochimica et Cosmochimica Acta and Chemical Geology.

In The Last Decade

Piers Koefoed

31 papers receiving 362 citations

Peers

Piers Koefoed

GEOPH

ECOLO

Zhen Tian United States

Chizu Kato France

Emily A. Pringle France

Ninja Braukmüller Germany

Ke Zhu Germany

Timo Hopp Germany

Haolan Tang United States

R. Hines United States

Liping Qin China

R. M. G. Armytage United States

Zhen Tian United States

Piers Koefoed

189 ×0.7

143 ×0.9

GEOPH

101 ×1.2

105 ×1.5

ECOLO

86 ×1.5

Citations per year, relative to Piers Koefoed Piers Koefoed (= 1×) peers Zhen Tian

Countries citing papers authored by Piers Koefoed

Since Specialization

Citations

This map shows the geographic impact of Piers Koefoed'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 Piers Koefoed with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Piers Koefoed more than expected).

Fields of papers citing papers by Piers Koefoed

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Piers Koefoed. 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 Piers Koefoed. The network helps show where Piers Koefoed may publish in the future.

Co-authorship network of co-authors of Piers Koefoed

This figure shows the co-authorship network connecting the top 25 collaborators of Piers Koefoed. A scholar is included among the top collaborators of Piers Koefoed 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 Piers Koefoed. Piers Koefoed is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Koefoed, Piers & Kun Wang. (2025). Unravelling chondrule formation processes: Clues from the potassium isotopic composition of chondrules from unequilibrated ordinary chondrites. Geochimica et Cosmochimica Acta. 398. 163–177. 1 indexed citations

Koefoed, Piers, Frédéric Moynier, Nicole X. Nie, et al.. (2025). Copper and zinc isotopic variation in Apollo 17 double drive tube 73001/2 reveals space weathering history of lunar regolith. Geochimica et Cosmochimica Acta. 407. 144–157.

Wang, Kun, Zhen Tian, Piers Koefoed, et al.. (2025). Potassium isotopic compositions and model exposure ages of lunar soils. Geochimica et Cosmochimica Acta. 396. 28–41. 3 indexed citations

Amelin, Yuri, Qing‐Zhu Yin, Piers Koefoed, et al.. (2024). Fractionation of radiogenic Pb isotopes in meteorites and their components induced by acid leaching. Geochimica et Cosmochimica Acta. 392. 52–69. 4 indexed citations

Koefoed, Piers, Jean‐Alix Barrat, O. V. Pravdivtseva, et al.. (2023). The potassium isotopic composition of CI chondrites and the origin of isotopic variations among primitive planetary bodies. Geochimica et Cosmochimica Acta. 358. 49–60. 10 indexed citations

Jiang, Yun, Ye Li, Jia Liu, et al.. (2023). Tracking and dating incipient melting of a new grouplet of primitive achondrites. Geochimica et Cosmochimica Acta. 345. 1–15. 4 indexed citations

Koefoed, Piers, O. V. Pravdivtseva, R. C. Ogliore, et al.. (2022). The dynamic formation process of the CB chondrite Gujba. Geochimica et Cosmochimica Acta. 332. 33–56. 9 indexed citations

Wang, Kun, Weiqiang Li, Shilei Li, et al.. (2021). Geochemistry and cosmochemistry of potassium stable isotopes. Geochemistry. 81(3). 125786–125786. 50 indexed citations

Koefoed, Piers, et al.. (2020). Potassium isotope systematics of the LL4 chondrite Hamlet: Implications for chondrule formation and alteration. Meteoritics and Planetary Science. 55(8). 16 indexed citations

10.

Huyskens, Magdalena H., M. E. Sanborn, Qing‐Zhu Yin, Y. Amelin, & Piers Koefoed. (2019). Chronology of Carbonaceous Achondrites from the Outer Solar System. Lunar and Planetary Science Conference. 2736. 1 indexed citations

11.

Koefoed, Piers, et al.. (2019). K Isotope Systematics of Individual Chondrules from the LL4 Chondrite Hamlet. Lunar and Planetary Science Conference. 1672. 1 indexed citations

12.

Tian, Zhen, et al.. (2019). Potassium Isotope Constraints on Near-Surface Fractionation Effects of Bulk Lunar Soils. LPI. 1586. 1 indexed citations

13.

Amelin, Yuri, Piers Koefoed, Tsuyoshi Iizuka, et al.. (2018). U-Pb, Rb-Sr and Ar-Ar systematics of the ungrouped achondrites Northwest Africa 6704 and Northwest Africa 6693. Geochimica et Cosmochimica Acta. 245. 628–642. 32 indexed citations

14.

Sanborn, M. E., Qing‐Zhu Yin, Yuri Amelin, Piers Koefoed, & Magdalena H. Huyskens. (2018). Early Differentiation of Carbonaceous Achondrite Parent Bodies: New Insights from Northwest Africa 10132. 81(2067). 6279. 2 indexed citations

15.

Amelin, Yuri, et al.. (2016). U-Pb Age of the Ungrouped Achondrite NWA 8486. 79(1921). 6231. 1 indexed citations

16.

Amelin, Y., Piers Koefoed, A. Bischoff, et al.. (2015). Pb Isotopic Age of ALM-A — A Feldspar-Rich Volcanic Rock from the Crust of the Ureilite Parent Body. LPICo. 78(1856). 5344. 6 indexed citations

17.

Yin, Qing‐Zhu, Y. Amelin, Piers Koefoed, Magdalena H. Huyskens, & M. E. Sanborn. (2015). U-Pb Dating of the Allende CAI A63 1-C-1. LPICo. 78(1856). 5088. 1 indexed citations

18.

Koefoed, Piers, Yuri Amelin, Qing Yin, M. E. Sanborn, & Magdalena H. Huyskens. (2015). A Re-Examination of the U-Pb Systematics of the Achondrite Asuka 881394. LPI. 1842. 4 indexed citations

19.

Iizuka, Tsuyoshi, Yuri Amelin, Angela Kaltenbach, Piers Koefoed, & Claudine H. Stirling. (2014). U–Pb systematics of the unique achondrite Ibitira: Precise age determination and petrogenetic implications. Geochimica et Cosmochimica Acta. 132. 259–273. 23 indexed citations

20.

Amelin, Yuri, Piers Koefoed, Tsuyoshi Iizuka, & A. J. Irving. (2013). U-Pb Age of Ungrouped Achondrite NWA 10132. 76(1856). 5165. 5 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.

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