The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 5 years. As of Jan 03, 2026, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (1.131.752) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
Rankings
Geochronology | Geochemistry | Petrology | Chemical geodynamic
H-Index Metrics
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H-Index124
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i10 Index341
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Citation Counts59,540
Rankings
Rankings
element partitioning | planetary accretion | volcanic gases | experimental petrolog
H-Index Metrics
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H-Index105
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i10 Index250
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Citation Counts33,385
Rankings
petroleum engineering | hydraulic fracturing | formation damage | water injection | production engineerin
H-Index Metrics
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H-Index101
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i10 Index635
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Citation Counts41,453
Rankings
mineralogy | astrobiology | astrochemistry | petrolog
H-Index Metrics
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H-Index100
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i10 Index354
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Citation Counts35,592
Rankings
Igneous petrology/geochemistry | Lithospheric mantle | Large igneous provinces | Big mantle Wedge | Earth's habitabilit
H-Index Metrics
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H-Index95
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i10 Index331
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Citation Counts33,719
Rankings
Igneous petrology | Experimental Petrology | Geochemistry | Mineralog
H-Index Metrics
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H-Index95
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i10 Index219
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Citation Counts33,403
Rankings
Geochronology | Isotope Geochemistry | LA-ICP-MS | Laser ablation ICP-MS | Petrolog
H-Index Metrics
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H-Index94
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i10 Index394
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Citation Counts35,792
Rankings
Isotope Geochemistry | Re-Os isotopes | Mantle Petrolog
H-Index Metrics
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H-Index92
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i10 Index364
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Citation Counts31,162
Rankings
petroleum engineering | reservoir engineering | enhanced oil recovery | reservoir simulatio
H-Index Metrics
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H-Index91
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i10 Index377
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Citation Counts30,076
Rankings
coal petrology | fly ash petrology | coal geochemistry | coal maceral origin
H-Index Metrics
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H-Index88
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i10 Index448
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Citation Counts29,347
Rankings
Switched systems | Fuzzy systems | Markovian jump systems | Delay systems | Robust contro
H-Index Metrics
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H-Index87
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i10 Index415
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Citation Counts28,044
Rankings
heat transfer | solar energy | optical properties | building | cf
H-Index Metrics
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H-Index86
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i10 Index658
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Citation Counts34,609
Rankings
Rankings
Rankings
Rankings
Rankings
Rankings
Rankings
Rankings
reservoir engineering | enhanced oil recovery | petroleum engineerin
H-Index Metrics
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H-Index79
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i10 Index280
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Citation Counts27,891
Rankings
Rankings
Rankings
heavy oil | interfacial science | chemical reactors | biochemical reactor
H-Index Metrics
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H-Index73
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i10 Index251
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Citation Counts16,568
Rankings
Enhanced Oil Recovery | Flow in Porous Media | Nano and Bio Technologies in Oil and Gas Industrie
H-Index Metrics
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H-Index71
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i10 Index255
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Citation Counts15,524
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