Citation Rankings
Highly Cited Researchers
South Africa Highly Cited Researchers CitationEngineering & Technology / Earth Sciences in South Africa Rankings 2025
Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: 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
isotope geochemistry
geochronology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,111
7,898
0.271
* Total Citation Counts Rankings
Ranking Based On Selection :2
Economic Geology
Mineral Prospectivity Mapping
Exploration Geochemistry
Geological Remote Sensing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,227
12,018
0.594
* Total Citation Counts Rankings
Ranking Based On Selection :3
Economic Geology
Iron and manganese deposits
Precambrian geology
Sedimentology and basin analyses.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,473
6,687
0.362
* Total Citation Counts Rankings
Ranking Based On Selection :4
geology
petrology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,378
4,684
0.326
* Total Citation Counts Rankings
Ranking Based On Selection :5
sedimentology
vertebrate palaeontology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,993
4,886
0.407
* Total Citation Counts Rankings
Ranking Based On Selection :6
Geology
Petrology
Geochemistry
Tectonics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,532
3,682
0.319
* Total Citation Counts Rankings
Ranking Based On Selection :7
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,080
3,729
0.337
* Total Citation Counts Rankings
Ranking Based On Selection :8
hydrology
agriculture
climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,878
2,677
0.246
* Total Citation Counts Rankings
Ranking Based On Selection :9
palaeontology
geology
stratigraphy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,010
3,942
0.394
* Total Citation Counts Rankings
Ranking Based On Selection :10
Geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,989
2,264
0.252
* Total Citation Counts Rankings
Ranking Based On Selection :11
Archaean geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,779
5,264
0.600
* Total Citation Counts Rankings
Ranking Based On Selection :12
Mantle Geochemistry
Cosmochemistry
Geology of southern Africa and western North America
Natural philosophy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,555
2,270
0.265
* Total Citation Counts Rankings
Ranking Based On Selection :13
Archaean geology
Economic Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,452
2,259
0.267
* Total Citation Counts Rankings
Ranking Based On Selection :14
geology
stable isotopes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,320
3,815
0.459
* Total Citation Counts Rankings
Ranking Based On Selection :15
Geology
Petrology
Experimental Petrology
Geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,300
3,868
0.466
* Total Citation Counts Rankings
Ranking Based On Selection :16
igneous petrology
isotope geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,792
3,867
0.496
* Total Citation Counts Rankings
Ranking Based On Selection :17
Geochronology
Economic Geology
Sedimentology
Laser Ablation
LA-ICP-MS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,590
3,852
0.508
* Total Citation Counts Rankings
Ranking Based On Selection :18
paleontology
bone histology
paleobiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,517
3,184
0.424
* Total Citation Counts Rankings
Ranking Based On Selection :19
Geosciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,978
1,721
0.247
* Total Citation Counts Rankings
Ranking Based On Selection :20
Geophysics
hazard and risk
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,962
1,918
0.322
* Total Citation Counts Rankings
Ranking Based On Selection :21
Mantle petrology
mantle geochemistry
isotope geochemistry
cosmochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,642
2,041
0.362
* Total Citation Counts Rankings
Ranking Based On Selection :22
Geology and Mineral Deposits
Precambrian
Early Life
CO2 sequestration
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,340
1,677
0.314
* Total Citation Counts Rankings
Ranking Based On Selection :23
Isotope Hydrology/Hydrogeology/Water Science/Water Resources Management/Water Quality
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,172
3,219
0.622
* Total Citation Counts Rankings
Ranking Based On Selection :24
paleontology
zoology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,149
2,460
0.478
* Total Citation Counts Rankings
Ranking Based On Selection :25
Petrology
Geochemistry
Geochronology
Geodynamics
Economic Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,858
3,039
0.626
* Total Citation Counts Rankings
Rankings
22,724
62
4
Ranking Based On Selection: 1
Jan Kramers
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,111
7,898
0.271
isotope geochemistry
geochronology
* Total Citation Counts Rankings
Rankings
38,705
117
10
Ranking Based On Selection: 2
EJM (John) Carranza
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,227
12,018
0.594
Economic Geology
Mineral Prospectivity Mapping
Exploration Geochemistry
Geological Remote Sensing
* Total Citation Counts Rankings
Rankings
43,777
136
9
Ranking Based On Selection: 3
Nic Beukes
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,473
6,687
0.362
Economic Geology
Iron and manganese deposits
Precambrian geology
Sedimentology and basin analyses.
* Total Citation Counts Rankings
Rankings
61,223
206
32
Ranking Based On Selection: 4
JD Clemens
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,378
4,684
0.326
* Total Citation Counts Rankings
Rankings
77,179
257
37
Ranking Based On Selection: 5
Roger MH Smith
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,993
4,886
0.407
sedimentology
vertebrate palaeontology
* Total Citation Counts Rankings
Rankings
80,919
275
40
Ranking Based On Selection: 6
Lewis Ashwal
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,532
3,682
0.319
Geology
Petrology
Geochemistry
Tectonics
* Total Citation Counts Rankings
Rankings
84,888
294
5
Ranking Based On Selection: 7
Denis Hughes
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,080
3,729
0.337
* Total Citation Counts Rankings
Rankings
86,819
301
28
Ranking Based On Selection: 8
Re Schulze
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,878
2,677
0.246
hydrology
agriculture
climate change
* Total Citation Counts Rankings
Rankings
95,676
341
47
Ranking Based On Selection: 9
Bruce S. Rubidge
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,010
3,942
0.394
palaeontology
geology
stratigraphy
* Total Citation Counts Rankings
Rankings
108,090
387
98
Ranking Based On Selection: 10
Anton Le Roex
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,989
2,264
0.252
* Total Citation Counts Rankings
Rankings
111,022
400
14
Ranking Based On Selection: 11
Axel Hofmann
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,779
5,264
0.600
* Total Citation Counts Rankings
Rankings
114,385
421
3
Ranking Based On Selection: 12
David Bell
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,555
2,270
0.265
Mantle Geochemistry
Cosmochemistry
Geology of southern Africa and western North America
Natural philosophy
* Total Citation Counts Rankings
Rankings
115,940
430
58
Ranking Based On Selection: 13
Carl Anhaeusser
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,452
2,259
0.267
Archaean geology
Economic Geology
* Total Citation Counts Rankings
Rankings
117,980
436
108
Ranking Based On Selection: 14
Chris Harris
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,320
3,815
0.459
* Total Citation Counts Rankings
Rankings
118,300
437
67
Ranking Based On Selection: 15
Gary Stevens
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,300
3,868
0.466
Geology
Petrology
Experimental Petrology
Geochemistry
* Total Citation Counts Rankings
Rankings
126,872
474
18
Ranking Based On Selection: 16
Marlina A. Elburg
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,792
3,867
0.496
igneous petrology
isotope geochemistry
* Total Citation Counts Rankings
Rankings
130,649
500
14
Ranking Based On Selection: 17
Dirk Frei (Né Landwehr)|Dirk Landwehr
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,590
3,852
0.508
Geochronology
Economic Geology
Sedimentology
Laser Ablation
LA-ICP-MS
* Total Citation Counts Rankings
Rankings
132,004
510
121
Ranking Based On Selection: 18
Anusuya Chinsamy
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,517
3,184
0.424
paleontology
bone histology
paleobiology
* Total Citation Counts Rankings
Rankings
142,923
563
134
Ranking Based On Selection: 19
Stephen H Richardson
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,978
1,721
0.247
* Total Citation Counts Rankings
Rankings
168,004
670
59
Ranking Based On Selection: 20
Andrzej Kijko
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,962
1,918
0.322
* Total Citation Counts Rankings
Rankings
177,421
718
174
Ranking Based On Selection: 21
Philip E. Janney
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,642
2,041
0.362
Mantle petrology
mantle geochemistry
isotope geochemistry
cosmochemistry
* Total Citation Counts Rankings
Rankings
187,201
774
39
Ranking Based On Selection: 22
Wladyslaw Altermann
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,340
1,677
0.314
Geology and Mineral Deposits
Precambrian
Early Life
CO2 sequestration
* Total Citation Counts Rankings
Rankings
193,018
797
101
Ranking Based On Selection: 23
Tamiru A. Abiye
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,172
3,219
0.622
Isotope Hydrology/Hydrogeology/Water Science/Water Resources Management/Water Quality
* Total Citation Counts Rankings
Rankings
193,854
801
102
Ranking Based On Selection: 24
Fernando Abdala
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,149
2,460
0.478
* Total Citation Counts Rankings
Rankings
205,152
847
47
Ranking Based On Selection: 25
Sebastian Tappe
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,858
3,039
0.626
Petrology
Geochemistry
Geochronology
Geodynamics
Economic Geology