Citation Rankings
Highly Cited Researchers
Engineering & Technology / Earth Sciences Highly Cited Researchers 42 Scientists Citation Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
sedimentology
vertebrate palaeontology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,159
4,766
0.362
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Geology
Petrology
Geochemistry
Tectonics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,812
3,223
0.273
* Total Citation Counts Rankings
Ranking Based On Selection: 3
palaeontology
geology
stratigraphy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,406
3,682
0.354
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Archaean geology
Economic Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,615
1,898
0.220
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Hydrogeology/Isotope Hydrology/Water Science/Water Resources Management/Water Quality
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,548
3,103
0.559
* Total Citation Counts Rankings
Ranking Based On Selection: 6
paleontology
zoology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,414
2,261
0.418
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,063
2,191
0.433
* Total Citation Counts Rankings
Ranking Based On Selection: 8
earth science
mining
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,041
2,227
0.442
* Total Citation Counts Rankings
Ranking Based On Selection: 9
geophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,806
1,611
0.335
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Geoscience
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,642
1,041
0.224
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Geochemistry
Geology
Geochronology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,155
1,848
0.445
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Geophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,966
1,436
0.362
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Paleontology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,604
2,198
0.610
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Environmenatl Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,147
848
0.269
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Geology
Neotectonics
Petrology
Meteoritics
Planetary Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,361
594
0.252
* Total Citation Counts Rankings
Ranking Based On Selection: 16
geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,177
801
0.368
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Mining Engineering
Spontaneous Combustion & Coal Applications
Sustainable Mining
Soft Computing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,040
1,943
0.952
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Geochemistry
Wetlands
Environmental Change
Ecotoxicology
Beach holidays
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,537
1,105
0.719
* Total Citation Counts Rankings
Ranking Based On Selection: 19
paleontology
biology
evolution
paleoneurology
phylogeny
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,351
1,029
0.762
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,206
411
0.341
* Total Citation Counts Rankings
Ranking Based On Selection: 21
sedimentology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
973
418
0.430
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Geosciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
966
204
0.211
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
923
366
0.397
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Isotope Geochemistry
Magmatism
Chemical Geodynamics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
846
653
0.772
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Geotechnical engineering
tailings management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
604
531
0.879
* Total Citation Counts Rankings
Rankings
72,554
245
36
Ranking Based On Selection: 1
Roger MH Smith
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,159
4,766
0.362
sedimentology
vertebrate palaeontology
* Total Citation Counts Rankings
Rankings
82,849
286
44
Ranking Based On Selection: 2
Lewis Ashwal
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,812
3,223
0.273
Geology
Petrology
Geochemistry
Tectonics
* Total Citation Counts Rankings
Rankings
96,249
340
47
Ranking Based On Selection: 3
Bruce S. Rubidge
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,406
3,682
0.354
palaeontology
geology
stratigraphy
* Total Citation Counts Rankings
Rankings
119,337
447
58
Ranking Based On Selection: 4
Carl Anhaeusser
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,615
1,898
0.220
Archaean geology
Economic Geology
* Total Citation Counts Rankings
Rankings
189,078
780
99
Ranking Based On Selection: 5
Tamiru A. Abiye
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,548
3,103
0.559
Hydrogeology/Isotope Hydrology/Water Science/Water Resources Management/Water Quality
* Total Citation Counts Rankings
Rankings
193,696
805
102
Ranking Based On Selection: 6
Fernando Abdala
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,414
2,261
0.418
* Total Citation Counts Rankings
Rankings
206,816
866
110
Ranking Based On Selection: 7
J Kinnaird
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,063
2,191
0.433
* Total Citation Counts Rankings
Rankings
207,717
867
111
Ranking Based On Selection: 8
Raymond Durrheim
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,041
2,227
0.442
* Total Citation Counts Rankings
Rankings
217,448
910
115
Ranking Based On Selection: 9
Gordon Cooper
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,806
1,611
0.335
* Total Citation Counts Rankings
Rankings
224,585
943
120
Ranking Based On Selection: 10
Roger Gibson
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,642
1,041
0.224
* Total Citation Counts Rankings
Rankings
248,875
1,057
131
Ranking Based On Selection: 11
Robert Bolhar
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,155
1,848
0.445
Geochemistry
Geology
Geochronology
* Total Citation Counts Rankings
Rankings
259,694
1,113
135
Ranking Based On Selection: 12
Susan Webb
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,966
1,436
0.362
* Total Citation Counts Rankings
Rankings
282,156
1,225
148
Ranking Based On Selection: 13
Jonah Choiniere
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,604
2,198
0.610
* Total Citation Counts Rankings
Rankings
316,500
1,410
165
Ranking Based On Selection: 14
Terence Mccarthy
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,147
848
0.269
* Total Citation Counts Rankings
Rankings
397,653
1,847
203
Ranking Based On Selection: 15
Marco Andreoli
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,361
594
0.252
Geology
Neotectonics
Petrology
Meteoritics
Planetary Sciences
* Total Citation Counts Rankings
Rankings
422,144
1,991
210
Ranking Based On Selection: 16
Sharad Master
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,177
801
0.368
* Total Citation Counts Rankings
Rankings
442,459
2,102
229
Ranking Based On Selection: 17
Moshood Onifade
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,040
1,943
0.952
Mining Engineering
Spontaneous Combustion & Coal Applications
Sustainable Mining
Soft Computing
* Total Citation Counts Rankings
Rankings
536,150
2,618
279
Ranking Based On Selection: 18
Marc Humphries
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,537
1,105
0.719
Geochemistry
Wetlands
Environmental Change
Ecotoxicology
Beach holidays
* Total Citation Counts Rankings
Rankings
580,664
2,890
300
Ranking Based On Selection: 19
Julien Benoit
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,351
1,029
0.762
paleontology
biology
evolution
paleoneurology
phylogeny
* Total Citation Counts Rankings
Rankings
620,903
3,134
323
Ranking Based On Selection: 20
Paul Nex
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,206
411
0.341
* Total Citation Counts Rankings
Rankings
698,098
3,574
357
Ranking Based On Selection: 21
Zubair Jinnah
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
973
418
0.430
* Total Citation Counts Rankings
Rankings
700,813
3,586
358
Ranking Based On Selection: 22
Mqw Jones
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
966
204
0.211
* Total Citation Counts Rankings
Rankings
717,140
3,672
368
Ranking Based On Selection: 23
Christine M. Steininger
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
923
366
0.397
* Total Citation Counts Rankings
Rankings
748,032
3,863
389
Ranking Based On Selection: 24
Grant Bybee
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
846
653
0.772
Isotope Geochemistry
Magmatism
Chemical Geodynamics
* Total Citation Counts Rankings
Rankings
862,918
4,600
447
Ranking Based On Selection: 25
Luis Alberto Torres-Cruz
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
604
531
0.879
Geotechnical engineering
tailings management