World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 43 4925 4544 232 211 100 7598

Thomas Chacko publications per year

The chart shows the history of publications by Thomas Chacko between 1986 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Thomas Chacko published across 40 years, from 1986 to 2025, averaging 2.8 papers a year. Output peaked at 9 publications in 2019. 8 of the 111 publications appeared in the last two years.

No. of publications
2 4 6 8
Bar chart. Horizontal axis: year, 1986 to 2025. Vertical axis: number of publications, 0 to 9. Peak 9 publications in 2019. 1986: 1 publication 1987: 1 publication 1988: 4 publications 1989: 1 publication 1990: 0 publications 1991: 4 publications 1992: 1 publication 1993: 1 publication 1994: 3 publications 1995: 2 publications 1996: 4 publications 1997: 1 publication 1998: 0 publications 1999: 1 publication 2000: 5 publications 2001: 2 publications 2002: 2 publications 2003: 2 publications 2004: 3 publications 2005: 2 publications 2006: 2 publications 2007: 3 publications 2008: 4 publications 2009: 4 publications 2010: 5 publications 2011: 3 publications 2012: 1 publication 2013: 1 publication 2014: 4 publications 2015: 1 publication 2016: 3 publications 2017: 3 publications 2018: 3 publications 2019: 9 publications 2020: 4 publications 2021: 3 publications 2022: 7 publications 2023: 3 publications 2024: 4 publications 2025: 4 publications
1986 2025

111 publications in total across all disciplines

View publications per year as a table
Thomas Chacko: publications per year, 1986 to 2025
Year Publications
1986 1
1987 1
1988 4
1989 1
1990 0
1991 4
1992 1
1993 1
1994 3
1995 2
1996 4
1997 1
1998 0
1999 1
2000 5
2001 2
2002 2
2003 2
2004 3
2005 2
2006 2
2007 3
2008 4
2009 4
2010 5
2011 3
2012 1
2013 1
2014 4
2015 1
2016 3
2017 3
2018 3
2019 9
2020 4
2021 3
2022 7
2023 3
2024 4
2025 4
Total 111
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Thomas Chacko publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Thomas Chacko sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 98–107 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 100 publications — 12th percentile

12% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404 100
108–117 484
118–127 540
128–137 557
138–147 491
148–157 495
158–167 458
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Thomas Chacko D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Thomas Chacko sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 43 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 43 D-Index — 47th percentile

47% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344
39 349
40 296
41 289
42 277
43 279 43
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

Thomas Chacko is affiliated with the University of Alberta in Canada and has contributed extensively to the field of Earth and Planetary Sciences, with a focus on Geophysics, Artificial Intelligence, Paleontology, Astronomy and Astrophysics, and Atmospheric Science. Their research portfolio includes 41 publications in these areas, emphasizing geological and geochemical analysis, earthquake and tectonic studies, high-pressure geophysics and materials, and geochemistry.

The major topics covered in Thomas Chacko's work include:

  • Geological and Geochemical Analysis
  • Earthquake and Tectonic Studies
  • High-Pressure Geophysics and Materials
  • Geochemistry and Geologic Mapping
  • Paleontology and Stratigraphy of Fossils
  • Geology and Paleoclimatology Research
  • Geochemistry and Elemental Analysis

Thomas Chacko's recent publications include:

  • Deep continental roots and cratons, 2021, Nature
  • Hafnium isotopes in zircons document the gradual onset of mobile-lid tectonics, 2020, Geochemical Perspectives Letters
  • Carbon and Nitrogen in Mantle-Derived Diamonds, 2022, Reviews in Mineralogy and Geochemistry
  • Re-Os systematics and chronology of graphite, 2022, Geochimica et Cosmochimica Acta
  • Quantifying the effect of late bombardment on terrestrial zircons, 2023, Earth and Planetary Science Letters

The frequent co-authors of Thomas Chacko are:

  • D. Graham Pearson
  • Jesse Reimink
  • Robert A. Creaser
  • Larry M. Heaman
  • Edith Martel

Significant publication venues for their work include:

  • Geochimica et Cosmochimica Acta
  • Goldschmidt2022 abstracts
  • Nature
  • Geochemical Perspectives Letters
  • Reviews in Mineralogy and Geochemistry

In addition to journal articles, Thomas Chacko has contributed to academic literature through book publications. Notably, they have published with Bloomsbury Publishing plc, with a title titled Tax Litigation Handbook released in 2024.

Best Publications

  • Oxygen isotope fractionations involving diopside, forsterite, magnetite, and calcite: Application to geothermometry

    Hitoshi Chiba;Thomas Chacko;Robert N Clayton;Julian R Goldsmith

  • Equilibrium Oxygen, Hydrogen and Carbon Isotope Fractionation Factors Applicable to Geologic Systems

    Thomas Chacko;David R. Cole;Juske Horita

  • The Granulite Uncertainty Principle: Limitations on Thermobarometry in Granulites

    B. Ronald Frost;Thomas Chacko

  • Oxygen and carbon isotope fractionations between CO2 and calcite

    Thomas Chacko;Toshiko K Mayeda;Robert N Clayton;Julian R Goldsmith

  • Temperatures of Granulite-facies Metamorphism: Constraints from Experimental Phase Equilibria and Thermobarometry Corrected for Retrograde Exchange

    David R. M. Pattison;Thomas Chacko;James Farquhar;Christopher R. M. McFARLANE

  • 1891–1883 Ma Southern Bastar–Cuddapah mafic igneous events, India: A newly recognized large igneous province

    Jason E. French;Larry M. Heaman;Thomas Chacko;Rajesh K. Srivastava

  • Metamorphic P-T Conditions of the Kerala (South India) Khondalite Belt, a Granulite Facies Supracrustal Terrain

    Thomas Chacko;G. R. Ravindra Kumar;Robert C. Newton

  • Earth’s earliest evolved crust generated in an Iceland-like setting

    Jesse R. Reimink;Thomas Chacko;Richard A. Stern;Larry M. Heaman

  • In situ petrographic thin section U-Pb dating of zircon, monazite, and titanite using laser ablation-MC-ICP-MS

    Antonio Simonetti;Larry M. Heaman;Thomas Chacko;Neil R. Banerjee;Neil R. Banerjee

  • Deep continental roots and cratons

    D. Graham Pearson;James M. Scott;Jingao Liu;Andrew Schaeffer

  • Further evaluation of the Re-Os geochronometer in organic-rich sedimentary rocks: A test of hydrocarbon maturation effects in the Exshaw Formation, Western Canada Sedimentary Basin

    Robert A Creaser;Poulomi Sannigrahi;Thomas Chacko;David Selby

  • Theoretical calculation of oxygen isotope fractionation factors in carbonate systems

    Thomas Chacko;Peter Deines

  • Role of oceanic plateaus in the initiation of subduction and origin of continental crust

    Rajeev Nair;Thomas Chacko

  • Oxygen isotope fractionations in muscovite, phlogopite, and rutile

    Thomas Chacko;Xiangsheng Hu;Toshiko K. Mayeda;Robert N. Clayton

  • Circa 2.3‐Ga Magmatism of the Arrowsmith Orogeny, Uranium City Region, Western Churchill Craton, Canada

    R. P. Hartlaub;L. M. Heaman;T. Chacko;K. E. Ashton

  • Multi-Stage Modification of the Northern Slave Mantle Lithosphere: Evidence from Zircon- and Diamond-Bearing Eclogite Xenoliths Entrained in Jericho Kimberlite, Canada

    Larry M. Heaman;Robert A. Creaser;Harrison O. Cookenboo;Tom Chacko

  • Geochemistry of high-grade supracrustal rocks from the Kerala Khondalite Belt and adjacent massif charnockites, South India

    Thomas Chacko;G.R. Ravindra Kumar;James K. Meen;John J.W. Rogers

  • Diamond growth from oxidized carbon sources beneath the Northern Slave Craton, Canada: A δ13C–N study of eclogite-hosted diamonds from the Jericho kimberlite

    Katie A. Smart;Thomas Chacko;Thomas Stachel;Karlis Muehlenbachs

  • No evidence for Hadean continental crust within Earth’s oldest evolved rock unit

    J. R. Reimink;J. R. Reimink;Joshua Davies;T. Chacko;R. A. Stern

  • Constraints on Rates of Granitic Magma Transport from Epidote Dissolution Kinetics

    Alan D. Brandon;Robert A. Creaser;Thomas Chacko

  • Tectonic setting of the Taltson magmatic zone at 1.92.0 Ga: a granitoid-based perspective

    Thomas Chacko;Suman K. De;Robert A. Creaser;Karlis Muehlenbachs

Frequent Co-Authors

Larry M. Heaman
Larry M. Heaman University of Alberta
Robert A. Creaser
Robert A. Creaser University of Alberta
Richard A. Stern
Richard A. Stern University of Alberta
Antonio Simonetti
Antonio Simonetti University of Notre Dame
Thomas Stachel
Thomas Stachel University of Alberta
Karlis Muehlenbachs
Karlis Muehlenbachs University of Alberta
Steven B. Shirey
Steven B. Shirey Carnegie Institution for Science
Sonja Aulbach
Sonja Aulbach Goethe University Frankfurt
Julian R. Goldsmith
Julian R. Goldsmith University of Chicago
Robert N. Clayton
Robert N. Clayton University of Chicago

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