Citation Rankings
Highly Cited Researchers
Africa Engineering & Technology Highly Cited Researchers 1.749 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
isotope geochemistry
geochronology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,740
6,893
0.232
* 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
21,429
11,453
0.534
* 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
19,089
5,913
0.310
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Geometallurgy
Mining & Environment
Waste management
Mineral processing
Mine backfill
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,613
9,350
0.563
* Total Citation Counts Rankings
Ranking Based On Selection: 5
geology
petrology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,758
4,321
0.293
* Total Citation Counts Rankings
Ranking Based On Selection: 6
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: 7
Structral Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,985
7,492
0.577
* Total Citation Counts Rankings
Ranking Based On Selection: 8
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: 9
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,346
3,332
0.294
* Total Citation Counts Rankings
Ranking Based On Selection: 10
hydrology
agriculture
climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,045
2,272
0.206
* Total Citation Counts Rankings
Ranking Based On Selection: 11
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: 12
climate
water
watershed management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,794
5,931
0.606
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Archaean geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,218
4,908
0.532
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,135
1,981
0.217
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Mantle Geochemistry
Cosmochemistry
Geology of southern Africa and western North America
Natural philosophy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,736
1,996
0.228
* Total Citation Counts Rankings
Ranking Based On Selection: 16
geology
stable isotopes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,638
3,525
0.408
* Total Citation Counts Rankings
Ranking Based On Selection: 17
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: 18
Geology
Petrology
Experimental Petrology
Geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,603
3,600
0.418
* Total Citation Counts Rankings
Ranking Based On Selection: 19
igneous petrology
isotope geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,118
3,641
0.449
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Geochemistry
Marine Geology
IWRM
Climate Change.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,114
3,998
0.493
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Geochronology
Economic Geology
Sedimentology
Laser Ablation
LA-ICP-MS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,874
3,433
0.436
* Total Citation Counts Rankings
Ranking Based On Selection: 22
paleontology
bone histology
paleobiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,796
3,006
0.386
* Total Citation Counts Rankings
Ranking Based On Selection: 23
geology
water
environment
climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,323
3,480
0.475
* Total Citation Counts Rankings
Ranking Based On Selection: 24
structural geology
Himalayan geology
paleoseismology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,254
2,040
0.281
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,135
6,510
0.912
* Total Citation Counts Rankings
Rankings
23,403
66
4
Ranking Based On Selection: 1
Jan Kramers
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,740
6,893
0.232
isotope geochemistry
geochronology
* Total Citation Counts Rankings
Rankings
37,770
117
10
Ranking Based On Selection: 2
EJM (John) Carranza
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,429
11,453
0.534
Economic Geology
Mineral Prospectivity Mapping
Exploration Geochemistry
Geological Remote Sensing
* Total Citation Counts Rankings
Rankings
44,293
141
9
Ranking Based On Selection: 3
Nic Beukes
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,089
5,913
0.310
Economic Geology
Iron and manganese deposits
Precambrian geology
Sedimentology and basin analyses.
* Total Citation Counts Rankings
Rankings
53,483
9
2
Ranking Based On Selection: 4
Mostafa Benzaazoua
Mohammed VI Polytechnic University
Ben Guerir, Morocco
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,613
9,350
0.563
Geometallurgy
Mining & Environment
Waste management
Mineral processing
Mine backfill
* Total Citation Counts Rankings
Rankings
62,559
213
33
Ranking Based On Selection: 5
JD Clemens
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,758
4,321
0.293
* Total Citation Counts Rankings
Rankings
72,565
245
36
Ranking Based On Selection: 6
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
73,801
99
7
Ranking Based On Selection: 7
Youssef Mm
Assiut University
Asyut, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,985
7,492
0.577
* Total Citation Counts Rankings
Rankings
82,856
285
43
Ranking Based On Selection: 8
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
86,971
297
5
Ranking Based On Selection: 9
Denis Hughes
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,346
3,332
0.294
* Total Citation Counts Rankings
Rankings
89,835
312
29
Ranking Based On Selection: 10
Re Schulze
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,045
2,272
0.206
hydrology
agriculture
climate change
* Total Citation Counts Rankings
Rankings
96,260
340
47
Ranking Based On Selection: 11
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
103,205
78
19
Ranking Based On Selection: 12
Woldeamlak Bewket
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,794
5,931
0.606
climate
water
watershed management
* Total Citation Counts Rankings
Rankings
110,575
399
15
Ranking Based On Selection: 13
Axel Hofmann
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,218
4,908
0.532
* Total Citation Counts Rankings
Rankings
111,726
407
101
Ranking Based On Selection: 14
Anton Le Roex
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,135
1,981
0.217
* Total Citation Counts Rankings
Rankings
117,520
440
3
Ranking Based On Selection: 15
David Bell
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,736
1,996
0.228
Mantle Geochemistry
Cosmochemistry
Geology of southern Africa and western North America
Natural philosophy
* Total Citation Counts Rankings
Rankings
118,995
445
109
Ranking Based On Selection: 16
Chris Harris
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,638
3,525
0.408
* Total Citation Counts Rankings
Rankings
119,348
447
58
Ranking Based On Selection: 17
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
119,544
448
69
Ranking Based On Selection: 18
Gary Stevens
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,603
3,600
0.418
Geology
Petrology
Experimental Petrology
Geochemistry
* Total Citation Counts Rankings
Rankings
127,400
484
21
Ranking Based On Selection: 19
Marlina A. Elburg
University of Johannesburg
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,118
3,641
0.449
igneous petrology
isotope geochemistry
* Total Citation Counts Rankings
Rankings
127,482
36
9
Ranking Based On Selection: 20
Eric Odada
University of Nairobi
Nairobi, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,114
3,998
0.493
Geochemistry
Marine Geology
IWRM
Climate Change.
* Total Citation Counts Rankings
Rankings
131,825
516
14
Ranking Based On Selection: 21
Dirk Frei (Né Landwehr)|Dirk Landwehr
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,874
3,433
0.436
Geochronology
Economic Geology
Sedimentology
Laser Ablation
LA-ICP-MS
* Total Citation Counts Rankings
Rankings
133,307
524
122
Ranking Based On Selection: 22
Anusuya Chinsamy
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,796
3,006
0.386
paleontology
bone histology
paleobiology
* Total Citation Counts Rankings
Rankings
142,582
46
12
Ranking Based On Selection: 23
Daniel Olago
University of Nairobi
Nairobi, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,323
3,480
0.475
geology
water
environment
climate change
* Total Citation Counts Rankings
Rankings
144,011
1
1
Ranking Based On Selection: 24
Bishal Nath Upreti|B.N. Upreti, Bishal Upreti
University of Zambia
Lusaka, Zambia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,254
2,040
0.281
structural geology
Himalayan geology
paleoseismology
* Total Citation Counts Rankings
Rankings
146,543
242
11
Ranking Based On Selection: 25
Mostafa R Abukhadra
Beni Suef University
Beni-Suef, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,135
6,510
0.912