Marc J. Defant

12.6k total citations · 5 hit papers
50 papers, 11.0k citations indexed

About

Marc J. Defant is a scholar working on Geophysics, Geology and Artificial Intelligence. According to data from OpenAlex, Marc J. Defant has authored 50 papers receiving a total of 11.0k indexed citations (citations by other indexed papers that have themselves been cited), including 45 papers in Geophysics, 16 papers in Geology and 11 papers in Artificial Intelligence. Recurrent topics in Marc J. Defant's work include Geological and Geochemical Analysis (43 papers), earthquake and tectonic studies (30 papers) and High-pressure geophysics and materials (21 papers). Marc J. Defant is often cited by papers focused on Geological and Geochemical Analysis (43 papers), earthquake and tectonic studies (30 papers) and High-pressure geophysics and materials (21 papers). Marc J. Defant collaborates with scholars based in United States, France and Australia. Marc J. Defant's co-authors include Mark S. Drummond, Pavel Kepezhinskas, René C. Maury, Hervé Bellón, Jifeng Xu, Qiang Wang, Ryuichi Shinjo, Robert P. Rapp, Fernando G. Sajona and Joseph Cotten and has published in prestigious journals such as Nature, Journal of Geophysical Research Atmospheres and Geochimica et Cosmochimica Acta.

In The Last Decade

Marc J. Defant

48 papers receiving 10.4k citations

Hit Papers

Derivation of some modern arc magmas by melting of young ... 1990 2026 2002 2014 1990 1990 2002 1996 1997 1000 2.0k 3.0k
What are hit papers?

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.

  1. Derivation of some modern arc magmas by melting of young subducted lithosphere
    1990 3.7k citations Marc J. Defant, Mark S. Drummond Nature profile →
  2. A model for Trondhjemite‐Tonalite‐Dacite Genesis and crustal growth via slab melting: Archean to modern comparisons
    1990 1.3k citations Mark S. Drummond, Marc J. Defant profile →
  3. Origin of Mesozoic adakitic intrusive rocks in the Ningzhen area of east China: Partial melting of delaminated lower continental crust?
    2002 872 citations Jifeng Xu, Ryuichi Shinjo et al. Geology profile →
  4. Petrogenesis of slab-derived trondhjemite–tonalite–dacite/adakite magmas
    1996 584 citations Mark S. Drummond, Marc J. Defant et al. profile →
  5. Trace element and SrNdPb isotopic constraints on a three-component model of Kamchatka Arc petrogenesis
    1997 536 citations Pavel Kepezhinskas, Frank McDermott et al. Geochimica et Cosmochimica Acta profile →

Peers

Marc J. Defant
Biao Song China
Yusheng Wan China
Jean‐François Moyen France
Jacques Charvet France
R.H. Smithies Australia
W R A Baragar Canada
Mei‐Fei Chu Taiwan
Jianping Zheng China
William J. Collins Australia
Boris A. Natal’in Türkiye
Biao Song China
Marc J. Defant
Citations per year, relative to Marc J. Defant Marc J. Defant (= 1×) peers Biao Song

Countries citing papers authored by Marc J. Defant

Since Specialization
Citations

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

Fields of papers citing papers by Marc J. Defant

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Marc J. Defant. 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 Marc J. Defant. The network helps show where Marc J. Defant may publish in the future.

Co-authorship network of co-authors of Marc J. Defant

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

All Works

20 of 20 papers shown
1.
Defant, Marc J.. (2025). Reevaluating gender-affirming care: biological foundations, ethical dilemmas, and the complexities of gender dysphoria. Journal of Sex & Marital Therapy. 51(2). 200–210.
2.
3.
Widom, Elisabeth, Pavel Kepezhinskas, & Marc J. Defant. (2003). Os and Sr Isotope Signatures in Kamchatka Adakites, Nb-Rich Arc Basalts and Mantle Pyroxenites: Inferences on Mantle and Crustal Processes. AGUFM. 2003. 4 indexed citations
4.
Xu, Jifeng, Ryuichi Shinjo, Marc J. Defant, Qiang Wang, & Robert P. Rapp. (2002). Origin of Mesozoic adakitic intrusive rocks in the Ningzhen area of east China: Partial melting of delaminated lower continental crust?. Geology. 30(12). 1111–1111. 872 indexed citations breakdown →
5.
Widom, Elisabeth, Pavel Kepezhinskas, & Marc J. Defant. (2001). Metasomatic Processes in the Kamchatka Sub-Arc Mantle Wedge: Evidence from Re-Os Isotope Studies of Mantle Xenoliths, Nb-Enriched Arc Basalts, and Adakites. 3716. 2 indexed citations
6.
Defant, Marc J., Sarah Sherman, René C. Maury, et al.. (2001). The geology, petrology, and petrogenesis of Saba Island, Lesser Antilles. Journal of Volcanology and Geothermal Research. 107(1-3). 87–111. 34 indexed citations
7.
Kepezhinskas, Pavel & Marc J. Defant. (2001). Nonchondritic Pt/Pd ratios in arc mantle xenoliths: Evidence for platinum enrichment in depleted island-arc mantle sources. Geology. 29(9). 851–851. 40 indexed citations
8.
Maury, René C., Marc J. Defant, Hervé Bellón, et al.. (2000). 10.1016/s0967-0653(98)85844-4. Time to knit. 169(1). 69–80. 26 indexed citations
9.
Maury, René C., Fernando G. Sajona, Manuel Pubellier, Hervé Bellón, & Marc J. Defant. (1996). Fusion de la croute oceanique dans les zones de subduction/collision recentes; l'exemple de Mindanao (Philippines). 167(5). 579–595. 89 indexed citations
10.
Francalanci, L., et al.. (1995). Crystal retention, fractionation and crustal assimilation in a convecting magma chamber, Nisyros Volcano, Greece. Bulletin of Volcanology. 56(8). 601–620. 4 indexed citations
11.
Hochstaedter, Alfred G., Pavel Kepezhinskas, Marc J. Defant, Mark S. Drummond, & Hervé Bellón. (1994). On the Tectonic Significance of Arc Volcanism in Northern Kamchatka. The Journal of Geology. 102(6). 639–654. 41 indexed citations
12.
13.
Defant, Marc J., Thomas E. Jackson, Mark S. Drummond, et al.. (1992). The geochemistry of young volcanism throughout western Panama and southeastern Costa Rica: an overview. Journal of the Geological Society. 149(4). 569–579. 406 indexed citations
14.
Maury, René C., Marc J. Defant, & Jean‐Louis Joron. (1992). Metasomatism of the sub-arc mantle inferred from trace elements in Philippine xenoliths. Nature. 360(6405). 661–663. 244 indexed citations
15.
Defant, Marc J. & Mark S. Drummond. (1990). Derivation of some modern arc magmas by melting of young subducted lithosphere. Nature. 347(6294). 662–665. 3672 indexed citations breakdown →
16.
Defant, Marc J. & Roger L. Nielsen. (1990). Interpretation of open system petrogenetic processes: Phase equilibria constraints on magma evolution. Geochimica et Cosmochimica Acta. 54(1). 87–102. 52 indexed citations
17.
Defant, Marc J., et al.. (1990). The geochemistry and tectonic setting of the northern section of the Luzon arc (The Philippines and Taiwan). Tectonophysics. 183(1-4). 187–205. 94 indexed citations
18.
Knittel, Ulrich, et al.. (1990). The Macolod Corridor: A rift crossing the Philippine island arc. Tectonophysics. 183(1-4). 265–271. 55 indexed citations
19.
Defant, Marc J., et al.. (1989). Geochemistry and tectonic setting of the Luzon arc, Philippines. Geological Society of America Bulletin. 101(5). 663–672. 99 indexed citations
20.
Ragland, Paul C. & Marc J. Defant. (1983). Silica standardization: a discriminant technique applied to a volcanic arc system. Earth and Planetary Science Letters. 64(3). 387–395. 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.

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