Productivity Rankings is a unique service offered only by “AD Scientific Index”. This is a ranking system derived from the i10 index in order to show the productivity of the scientist in publishing scientific articles of value. Productivity Rankings is an instrument that lists productive scientists in a given area, discipline, university, and country and can guide the development of meaningful incentives and academic policies. The world rankings, regional rankings, and university rankings of scientists in this table are developed based on the total i10 index. Additionally, click to view the special rankings based on Productivity Rankings: Scientists Last 6 years' i10 Index", Universities Total i10 Index Rankings 2025, Universities Last 6 Years i10 Index Rankings 2025 "Art and Humanities i10 Productivity Rankings" and "Social Sciences and Humanities i10 Productivity Rankings".
* Total i10 IndexRankings
Ranking Based On Selection :1
Economic Geology
Mineral Prospectivity Mapping
Exploration Geochemistry
Geological Remote Sensing
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
212
197
0.929
* Total i10 IndexRankings
Ranking Based On Selection :2
Economic Geology
Iron and manganese deposits
Precambrian geology
Sedimentology and basin analyses.
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
186
143
0.769
* Total i10 IndexRankings
Ranking Based On Selection :3
palaeontology
geology
stratigraphy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
170
111
0.653
* Total i10 IndexRankings
Ranking Based On Selection :4
isotope geochemistry
geochronology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
163
113
0.693
* Total i10 IndexRankings
Ranking Based On Selection :5
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
160
81
0.506
* Total i10 IndexRankings
Ranking Based On Selection :6
hydrology
agriculture
climate change
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
154
70
0.455
* Total i10 IndexRankings
Ranking Based On Selection :7
geology
stable isotopes
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
152
107
0.704
* Total i10 IndexRankings
Ranking Based On Selection :8
sedimentology
vertebrate palaeontology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
146
123
0.842
* Total i10 IndexRankings
Ranking Based On Selection :9
Geology
Petrology
Geochemistry
Tectonics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
133
86
0.647
* Total i10 IndexRankings
Ranking Based On Selection :10
Geochronology
Economic Geology
Sedimentology
Laser Ablation
LA-ICP-MS
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
128
109
0.852
* Total i10 IndexRankings
Ranking Based On Selection :11
Archaean geology
Economic Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
126
58
0.460
* Total i10 IndexRankings
Ranking Based On Selection :12
Archaean geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
125
106
0.848
* Total i10 IndexRankings
Ranking Based On Selection :13
paleontology
bone histology
paleobiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
103
0.844
* Total i10 IndexRankings
Ranking Based On Selection :14
igneous petrology
isotope geochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
112
97
0.866
* Total i10 IndexRankings
Ranking Based On Selection :15
paleontology
zoology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
106
84
0.792
* Total i10 IndexRankings
Ranking Based On Selection :16
geology
petrology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
99
75
0.758
* Total i10 IndexRankings
Ranking Based On Selection :17
Geology
Petrology
Experimental Petrology
Geochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
98
80
0.816
* Total i10 IndexRankings
Ranking Based On Selection :18
Isotope Hydrology/Hydrogeology/Water Science/Water Resources Management/Water Quality
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
98
78
0.796
* Total i10 IndexRankings
Ranking Based On Selection :19
earth science
mining
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
93
54
0.581
* Total i10 IndexRankings
Ranking Based On Selection :20
Metamorphic Petrology
Field Geology
Tectonics
Evolution of High-Grade Terranes
Fluids
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
92
45
0.489
* Total i10 IndexRankings
Ranking Based On Selection :21
Geoscience
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
88
47
0.534
* Total i10 IndexRankings
Ranking Based On Selection :22
Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
87
63
0.724
* Total i10 IndexRankings
Ranking Based On Selection :23
Geochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
85
55
0.647
* Total i10 IndexRankings
Ranking Based On Selection :24
geology
analytical geochemistry
analytical isotope palaeo-science
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
80
72
0.900
* Total i10 IndexRankings
Ranking Based On Selection :25
Groundwater resources and related issues
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
78
54
0.692
EJM (John) Carranza
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
212
197
0.929
Economic Geology
Mineral Prospectivity Mapping
Exploration Geochemistry
Geological Remote Sensing
Nic Beukes
University of Johannesburg
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
186
143
0.769
Economic Geology
Iron and manganese deposits
Precambrian geology
Sedimentology and basin analyses.
Bruce S. Rubidge
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
170
111
0.653
palaeontology
geology
stratigraphy
Jan Kramers
University of Johannesburg
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
163
113
0.693
isotope geochemistry
geochronology
Denis Hughes
Rhodes University
Grahamstown, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
160
81
0.506
Re Schulze
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
154
70
0.455
hydrology
agriculture
climate change
Chris Harris
University of Cape Town
Cape Town, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
152
107
0.704
Roger MH Smith
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
146
123
0.842
sedimentology
vertebrate palaeontology
Lewis Ashwal
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
133
86
0.647
Geology
Petrology
Geochemistry
Tectonics
Dirk Frei (Né Landwehr)|Dirk Landwehr
University of the Western Cape
Bellville, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
128
109
0.852
Geochronology
Economic Geology
Sedimentology
Laser Ablation
LA-ICP-MS
Carl Anhaeusser
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
126
58
0.460
Archaean geology
Economic Geology
Axel Hofmann
University of Johannesburg
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
125
106
0.848
Anusuya Chinsamy
University of Cape Town
Cape Town, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
103
0.844
paleontology
bone histology
paleobiology
Marlina A. Elburg
University of Johannesburg
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
112
97
0.866
igneous petrology
isotope geochemistry
Fernando Abdala
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
106
84
0.792
JD Clemens
Stellenbosch University
Stellenbosch, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
99
75
0.758
Gary Stevens
Stellenbosch University
Stellenbosch, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
98
80
0.816
Geology
Petrology
Experimental Petrology
Geochemistry
Tamiru A. Abiye
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
98
78
0.796
Isotope Hydrology/Hydrogeology/Water Science/Water Resources Management/Water Quality
Raymond Durrheim
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
93
54
0.581
Dirk Van Reenen
University of Johannesburg
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
92
45
0.489
Metamorphic Petrology
Field Geology
Tectonics
Evolution of High-Grade Terranes
Fluids
Roger Gibson
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
88
47
0.534
J Kinnaird
University of the Witwatersrand
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
87
63
0.724
Anton Le Roex
University of Cape Town
Cape Town, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
85
55
0.647
Petrus Le Roux
University of Cape Town
Cape Town, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
80
72
0.900
geology
analytical geochemistry
analytical isotope palaeo-science
Yongxin Xu
University of the Western Cape
Bellville, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
78
54
0.692
Groundwater resources and related issues