Citation Rankings
Highly Cited Researchers

GNS Science Highly Cited Researchers CitationEngineering & Technology / Petroleum Engineering 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 IndexUniversities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025

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Total 2 scientist
* Total Citation Counts Rankings
Ranking Based On Selection :1
New Zealand
Geoff Kilgour
Igneous petrology
physical volcanology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,443
1,098
0.761
* Total Citation Counts Rankings
Ranking Based On Selection :2
New Zealand
Debra Chappell
Geochemistry
MIneralogy
Petrology
Geothermal
Environmental
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
741
242
0.327
* Total Citation Counts Rankings
Rankings
544,904
New Zealand
3,008
65
Ranking Based On Selection: 1
Geoff Kilgour
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,443
1,098
0.761
* Total Citation Counts Rankings
Rankings
775,144
New Zealand
4,009
88
Ranking Based On Selection: 2
Debra Chappell
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
741
242
0.327
Geochemistry
MIneralogy
Petrology
Geothermal
Environmental