2026 John D. Clemens: Earth Science Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Earth Science	52	2969	2712	12	7	137	15114

Research.com Recognitions

2026 - Research.com Earth Science in South Africa Leader Award
2025 - Research.com Earth Science in South Africa Leader Award

Overview

John D. Clemens is affiliated with Stellenbosch University in South Africa. Their research spans primarily across Earth and Planetary Sciences and Computer Science, with a significant emphasis on geophysics and artificial intelligence within these broader fields.

The main topics of Clemens's work include geological and geochemical analysis, geochemistry and geologic mapping, high-pressure geophysics and materials, earthquake and tectonic studies, geological and geophysical studies, paleontology and stratigraphy of fossils, and geology and paleoclimatology research.

Clemens has published extensively in various scientific journals and contributed to multiple fields. Frequent publication venues include:

Australian Journal of Earth Sciences
Contributions to Mineralogy and Petrology
arXiv (Cornell University)
Earth-Science Reviews
South African Journal of Geology

Frequent collaborators in Clemens's research include Gary Stevens, Matthew Jason Mayne, Nick Petford, Alexander Kisters, and G. Neil Phillips.

Selected recent papers by Clemens cover several aspects of geological sciences. These papers include:

"Comparative safety of mRNA COVID-19 vaccines to influenza vaccines: A pharmacovigilance analysis using WHO international database," 2021, Journal of Medical Virology
"Igneous differentiation by deformation," 2020, Contributions to Mineralogy and Petrology
"How are silicic volcanic and plutonic systems related? Part 1: A review of geological and geophysical observations, and insights from igneous rock chemistry," 2022, Earth-Science Reviews
"Do arc silicic magmas form by fluid-fluxed melting of older arc crust or fractionation of basaltic magmas?" 2021, Contributions to Mineralogy and Petrology
"Mafic schlieren, crystal accumulation and differentiation in granitic magmas: an integrated case study," 2020, Contributions to Mineralogy and Petrology

Best Publications

Origin of an A-type granite; experimental constraints

J. D. Clemens;John R. Holloway;A. J. R. White

1164
Citations
Origin of high-potassium, talc-alkaline, I-type granitoids

Malcolm P. Roberts;John D. Clemens

1045
Citations
Constraints on melting and magma production in the crust

J.D. Clemens;D. Vielzeuf

956
Citations
Granitic magma transport by fracture propagation

J.D. Clemens;C.K. Mawer

786
Citations
S-type granitic magmas—petrogenetic issues, models and evidence

J.D. Clemens

772
Citations
Origin and crystallization of some peraluminous (S-type) granitic magmas

John D. Clemens;Victor J. Wall

637
Citations
What controls chemical variation in granitic magmas

J.D. Clemens;G. Stevens

635
Citations
Melt production during granulite-facies anatexis: experimental data from “primitive” metasedimentary protoliths

Gary Stevens;John D. Clemens;Giles T. R. Droop

465
Citations
The enigmatic sources of I-type granites: The peritectic connexion

J.D. Clemens;G. Stevens;F. Farina

412
Citations
Archaean TTGs as sources of younger granitic magmas: melting of sodic metatonalites at 0.6–1.2 GPa

J. M. Watkins;J. D. Clemens;P. J. Treloar

344
Citations
Origin of potassic (C-type) adakite magmas: Experimental and field constraints

L. Xiao;J.D. Clemens

292
Citations
Models for Granitoid Evolution and Source Compositions

V. J. Wall;J. D. Clemens;D. B. Clarke

284
Citations
The Granulite — Granite Connexion

J. D. Clemens

284
Citations
Granites, Granulites, and Crustal Differentiation

D. Vielzeuf;J. D. Clemens;C. Pin;E. Moinet

275
Citations
Petrogenesis and Experimental petrology of granitic rocks

Unknown

267
Citations
Origin and evolution of a peraluminous silicic ignimbrite suite: The Violet Town Volcanics

John D. Clemens;Victor J. Wall

237
Citations
Late Triassic granitoids of the eastern margin of the Tibetan Plateau: Geochronology, petrogenesis and implications for tectonic evolution

L. Xiao;H.F. Zhang;J.D. Clemens;Q.W. Wang

232
Citations
The Nature and Origin of Granite

Unknown

221
Citations
The fluid regime of high-temperature metamorphism during granitoid magma genesis

J.D. Clemens;J.M. Watkins

211
Citations
Petrogenesis of Mafic to Felsic Plutonic Rock Associations: the Calc-alkaline Quérigut Complex, French Pyrenees

Malcolm P. Roberts;Christian Pin;John D. Clemens;Jean-Louis Paquette

202
Citations
Fluid-absent melting and the roles of fluids in the lithosphere: a slanted summary?

G. Stevens;J.D. Clemens

196
Citations
Water contents of silicic to intermediate magmas

J.D. Clemens

192
Citations
Plate tectonics and crustal evolution: Condie, K. C. 1989. (third edition). Pergamon Press, Oxford. 476 pp. Price £55.50, $100.00 (hardback); £30.00, $49.50 (softback)

Unknown

12
Citations

Frequent Co-Authors

Gary Stevens Stellenbosch University

Nick Petford Durham University

Ian S. Buick Stellenbosch University

Dirk Frei University of the Western Cape

Marlina Elburg University of Johannesburg

Ron H. Vernon Macquarie University

A. J. R. White University of Melbourne

Marian B. Holness University of Cambridge

Christian Pin Centre national de la recherche scientifique, CNRS

John R. Holloway Arizona State University

External Links

Personal website of John D. Clemens

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