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Dr. Kofi Adomako-Ansah

kadomakoansah@umat.edu.gh

Position

Head, Department of Geological Engineering (2023-date); Senior Lecturer (2019-date); former Vice Dean, Office of International Programmes (2021-2022)

Department

Geological Engineering

Research Interest

To address fundamental physical and chemical processes involved in ore-forming systems in the earth crust by combining geo-analytical methods and techniques with field-based projects; with applications for ore genesis and resource modeling, mineral exploration, resource evaluation of large and small scale mining projects and the environmental geosciences.

SPECIALTIES: 1. Economic & Ore Deposit Geology, 2. Ore Genesis Modelling 3. Fluid Inclusion & Isotope Geochemistry, 4. Major & Trace Element Geochemistry, 5. Ore Mineralogy & Petrology, 6. Water-Rock Interactions,  7. Geochemistry of Hydrothermal Fluids & Alteration, 8. Mineral Thermodynamics 9. Igneous & Metamorphic Petrology, 10. Field & Structural Geology




Autobiography

Dr Kofi Adomako-Ansah is an Economic and Exploration Geologist who applies geology, petrology, mineralogy, and geochemistry to model ore genetic processes and environments for applications to (1) the understanding of local and regional vectors towards ore deposit systems, (2) mineral exploration, (3) resource evaluation of large and small scale mining projects, (4) petrogenesis of igneous and metamorphic rocks and their geodynamic settings (5) geotechnical engineering, and (6) the environmental geosciences. He is also carrying out recent applications of geochemical and statistical evaluation techniques to assess the quality and petroleum source-rock potential of the Tano Basin hydrocarbon systems of Ghana.

He is a Senior Lecturer at the Department of Geological Engineering since 2019 and current Head of the  Department of Geological Engineering. He is a former Vice Dean for the Office of International Programmes (OIP) at UMaT. Prior to his appointment at UMaT, he was an Assistant Professor (2016-2018) and Post-doctoral Research Fellow (2012-2015) at Akita University, Akita City, in Japan.

His scientific domain is in the mineral resources and the geological and geochemical processes that influence the formation of Metallogenic Provinces, Igneous and Metamorphic Petrogenesis and Tectonics. His primary research focus is on precious, base, and rare earth metal deposits in diverse geological environments including orogenic, epithermal, magmatic, volcanogenic and seafloor ore deposits.

He is a recipient of the GCM-TEF 2022 Faculty Research Grant Award (US$ 10,000) for the 2021/2022 Academic year, from the Ghana Chamber of Mines.

 

 

Academic Degrees

2012
PhD. Economic/Ore Deposit Geology & Geochemistry.
Akita University, Akita, Japan
2008
MEng. Economic/Ore Deposit Geology & Geochemistry.
Akita University, Akita, Japan
2005
Cert. Japanese Language Proficiency.
Iwate University, Morioka, Japan
2000
BSc (Hons). Geology.
University of Ghana, Legon, Ghana

Institutions Attended

2006--2012
Akita University, Akita, Japan (PhD & MEng)
2005--2005
Iwate University, Morioka, Japan (Cert. Japanese Language Proficiency)
1997--2000
University of Ghana, Legon, Ghana (BSc (Hons))
1988--1995
Achimota School, Achimota, Ghana (GCE 'O' and 'A' Levels; Science Option)

Professional Bodies

2021--date
Associate Member, Society of Resource Geology (SRG)
2019--date
Member, University Teachers Association of Ghana (UTaG)
2019--date
Member, Ghana Institute of Geoscientists (GhIG)
2012--date
Member, Society of Economic Geologists (SEG)
2012--date
Member, Society of Geology Applied to Mineral Deposits (SGA)
2012--2020
Member, Society of Resource Geology (SRG)

Awards

2023
One (1) out of five (5) GCM-TEF 2023 Postgraduate Research Grant Awards (total: US$ 5,000 for one fiscal year) from the Ghana Chamber of Mines was won by an MSc Student under my direct supervision.
2023
4. Interesting Paper in Economic Geology; from the Society of Economic Geologists (SEG), USA (https://doi.org/10.5382/econgeo.4966)
2022
One (1) out of five (5) GCM-TEF 2022 Postgraduate Research Grant Awards (total: US$ 5,000 for one fiscal year) from the Ghana Chamber of Mines was won by an MSc Student under my direct supervision .
2022
Recipient of the GCM-TEF Faculty Research Grant Award 2022 (US$ 10,000), from the Ghana Chamber of Mines, to cover research project cost .
2022
3. Interesting Paper in Economic Geology; from the Society of Economic Geologists (SEG), USA ( https://doi.org/10.5382/econgeo.117.4.ip01)
2021
Five (5) out of seven (7) GCM-TEF 2021 Postgraduate Research Grant Awards (total: US$ 22,000 for one fiscal year) from the Ghana Chamber of Mines were won by MSc/MPhil/PhD Students under my direct supervision
2021
Faculty Intern at the Exploration and Mine Geology Departments, Asanko Gold Mines Ltd, Ghana and fully funded by the Ghana Chambers of Mines Tertiary Education Fund (GCM-TEF)
2021
Faculty Intern at the Exploration Department, Kinross Chirano Gold Mine Ltd, Ghana and fully funded by the Ghana Chambers of Mines Tertiary Education Fund (GCM-TEF)
2018
1. Interesting Paper in Economic Geology; from the Society of Economic Geologists (SEG), USA ( https://doi.org/10.5382/econgeo.113.7.ip01 )
2018
2. Interesting Paper in Economic Geology; from the Society of Economic Geologists (SEG), USA ( https://doi.org/10.5382/econgeo.113.1.ip01 )
2014
Best Article Award 2013; from the Society of Resource Geology (SRG), Japan ( https://doi.org/10.1111/rge.12049 )
2011
Excellent Student Presentation Award 2011; from the Awarding Committee of the Asia-Africa Minerals Resources International Conference, Fukuoka, Japan
2009
Travel Grant; from the Society of Resource Geology to visit South Africa for fieldwork at the Amalia/Blue Dot Gold Deposit of South Africa for PhD studies.
2005
Japanese Government (Monbukagakusho: MEXT) Full Scholarship for Postgraduate Studies (PhD & MEng) in Economic/Ore Deposit Geology and Geochemistry at Akita University, Akita, Japan (2005-2011)
2000
Best Undergraduate Fieldwork/Project Thesis in Geology at the Department of Geology (now Department of Earth Sciences), University of Ghana, Legon, Ghana

Academic Rank

2019--date
Senior Lecturer (Economic/Ore Deposit Geology, Geochemistry, Petrology & Mineralogy @ University of Mines and Technology, Tarkwa, Ghana)
2016--2018
Assistant Professor (Economic/Ore Deposit Geology & Geochemistry @ Akita University, Akita, Japan)
2012--2016
Post-doctoral Research Fellow (Economic Geology & Geochemistry @ Akita University, Akita, Japan)
2008--2012
Research and Teaching Assistant (Economic/Ore Deposit Geology & Geochemistry @ Akita University, Akita, Japan))
2006--2008
Teaching Assistant (Economic/Ore Deposit Geology & Geochemistry @ Akita University, Akita, Japan)
2005--2006
Graduate Research Trainee (Economic/Ore Deposit Geology @ Akita University, Akita Japan))
2002--2004
High School Teacher (Physics @ Asamankese High School, Asamankese, Ghana)
2001--2001
National Service/High School Teacher (Mathematics, Physics & Chemistry @ St Thomas Sec/Tech School; Asamankese, Ghana)
2000--2000
Graduate Exploration Geologist (Cha Mining Company, Pramkese, E/R, Ghana)

Journal Publications

  1. Abubakar, R., Adomako-Ansah, K, Marfo, S.A., Fenyi, C. and Owusu, J.A. (2023), "Integrated Geochemical and Statistical Evaluation of the Source Rock Potential in the Deep-Water, Western Basin of Ghana", Journal of Petroleum Science and Engineering, Vol. 220, pp. 1-18 (111164), https://doi.org/10.1016/j.petrol.2022.111164
  2. Fiadonu, E.B., Hammond, N.Q., Dzigbodi-Adjimah, K. and Adomako-Ansah, K. (2023), "Ore Fluid Characteristics and Depositional Processes of the Hydrothermal Gold Mineralisation at Damang, Southwestern Ghana", Journal of African Earth Sciences, Vol. 197, pp. 1-13 (0147171), https://doi.org/10.1016/j.jafrearsci.2022.104741
  3. Li, H., Shao, Y., Zhang, Y., Zhao, L., Adomako-Ansah, K., and Shah, S. A. (2022), "Distinct Au and Ag precipitation mechanism in the Xiayingfang Au–Ag deposit, North China Craton", Ore Geology Reviews, Vol. 147, pp. 1-18 (104968), https://doi.org/10.1016/j.oregeorev.2022.104968
  4. Adomako-Ansah, K., Boateng, A. and Asante, A. (2022), "Implications of Ore Textures for Gold Recovery at Esaase Deposit, Asanko Gold Mine", Ghana Mining Journal, Vol. 22 , pp. 9-14
  5. Abubakar, R., Adomako-Ansah, K, Marfo, S.A., Owusu, J.A. and Fenyi, C. (2022), "Origin And Depositional Environment of Oils and Sediments in the Cretaceous Deep-Water Tano Basin, Ghana: Constraints from Biomarkers", Journal of Petroleum Science and Technology, pp. 1-26 (2143804), https://doi.org/10.1080/10916466.2022.2143804
  6. Gatsé Ebotehouna, C., Xie, Y., Adomako-Ansah, K., Gourcerol, B., and Qu, Y. (2021), "Depositional Environment and Genesis of the Nabeba Banded Iron Formation (BIF) in the Ivindo Basement Complex, Republic of the Congo: Perspective from Whole-Rock and Magnetite Geochemistry.", Minerals, Vol. 11 , pp. 579-603
  7. Li, H., Zhang, Y., Shao, Y., Zhao, L., and Adomako-Ansah, K. (2021), "Late Jurassic magmatism and associated Au–Cu polymetallic mineralization in North China Craton: Implications from U–Pb–Hf–Sr–Nd isotopes of the Xiayingfang intermediate-felsic igneous rocks.", Ore Geology Reviews, Vol. 139 (Part A), pp. 1-22 (104425), https://doi.org/10.1016/j.oregeorev.2021.104425
  8. Gatsé Ebotehouna, C., Xie, Y., Adomako-Ansah, K., and Qu, Y. (2021), "Petrology, geochemistry, and zircon U-Pb-Lu-Hf isotopes of granitoids from the Ivindo Basement Complex of Souanké Area, Republic of Congo: insights into the evolution of an Archean continental crust.", Geological Journal, Vol. 56 , pp. 4861–4887
  9. Zhang, J., Adomako-Ansah, K., Ishiyama, D., and Allen, R.L. (2021), "Mineralogical and Oxygen-Hydrogen Isotopic Constraints Suggest a Submarine, Syngenetic Origin For the Paleoproterozoic Boliden Au-rich Massive Sulphide Deposit in the Skellefte District of Sweden. ", Economic Geology, ,
  10. Brako, B.A., Foli, G., Adomako-Ansah, K., Aikins, D., Dery, S., and Gawu, S.K.Y. (2020), "Petrography and Geochemistry of some Paleoproterozoic Granitoids at the North-eastern Margin of the Kumasi Basin in Ghana.", Earth Sciences Malaysia, Vol. 4 , pp. 87-95
  11. Ebotehouna, C.G., Xie, Y., Adomako-Ansah, K., and Pei, L. (2019), "Fluid Inclusion and Oxygen Isotope Characteristics of Vein Quartz associated with the Nabeba Iron Deposit, Republic of Congo: Implications for the Enrichment of Hypogene Ores.", Minerals, Vol. 9 , pp. 677-698
  12. Adomako-Ansah, K., Ishiyama, D., and Allen, R. (2018), "Origin of Zn-Pb-Sb-Au Mineralization adjacent to the Paleoproterozoic Boliden Au-rich VMS deposit, Sweden: Evidence from Petrographic and Oxygen Isotope Characteristics.", Mineralium Deposita, Vol. 53 , pp. 683-700 [2. Interesting Paper, from SEG, USA]
  13. Adomako-Ansah, K., Mizuta, T., Ishiyama, D., and Hammond, N.Q. (2017), "Nature of Ore-forming Fluid and Formation Conditions of BIF-hosted Gold Mineralization in the Archean Amalia Greenstone Belt, South Africa: Constraints from Fluid Inclusion and Stable Isotope Studies.", Ore Geology Reviews, Vol. 89 , pp. 609–626 [1. Interesting Paper, from SEG, USA
  14. Adomako-Ansah, K., Mizuta, T., Hammond, N.Q., Ishiyama, D., Ogata, T., and Chiba, H. (2013), "Gold Mineralization in Banded Iron Formation at the Amalia Greenstone Belt: A Mineralogical and Sulfur Isotope Study.", Resource Geology, Vol. 63 , pp. 119-140 [Best Article Award 2013, from SRG, JP

Conference Publications

  1. Adomako-Ansah, K., Hammond, N.Q., Ishiyama, D. and Morishita, Y. (2022), "Gold Mineralization in the Kraaipan-Amalia Greenstone Terrane, South Africa: Common Fertile Source for Ore-forming Fluids", 7th Biennial International Mining and Minerals Conference, UMaT, Tarkwa , pp 5-6
  2. Adomako-Ansah, K., Zhang, J., Ishiyama, D. and Allen, R.L. (2022), "Oxygen Isotope Revelation on the Genesis of the Metamoprhosed Boliden Gold Deposit, Skellefte District, Sweden and Its implication for Exploration", 7th Biennial International Mining and Minerals Conference, UMaT, Tarkwa , p. 1
  3. Amekudzi, E., Adomako-Ansah, K. and Sunkari, E.D. (2022), "Source of Heavy Metals and Pollution Assessment of Agricultural Soils in the Wassa Area, Ghana", 7th Biennial International Mining and Minerals Conference, UMaT, Tarkwa , pp. 2-3
  4. Adomako-Ansah, K. and Agyekum, E. (2022), "Evolution, Enrichment, and Exploration of Lithium: Insights from Whole Rock Geochemical Characterisation of Pegmatites in the Biriwa and Ewoyaa Areas, Central Region of Ghana", 7th Biennial International Mining and Minerals Conference, UMaT, Tarkwa , p. 4
  5. Adomako-Ansah, K., Zhang, J., Ishiyama, D., Allen, R. and Nkrumah, I. (2022), "Revised Ore Mineralogy and Paragenesis in the Boliden Gold Deposit of Sweden, Based on Scanning Microanalysis ", 7th Biennial International Mining and Minerals Conference, UMaT, Tarkwa , p. 8
  6. Adomako-Ansah, K. and Ameyaw, D.S. (2022), "Oxygen Isotopes: A New Parameter for Constraining Birimian Granitoid Petrogenesis and Gold Exploration in Granitoid-Hosted Terranes of SW Ghana", 7th Biennial International Mining and Minerals Conference, UMaT, Tarkwa , p. 7
  7. Adomako-Ansah, K., Boateng, A. and Asante, A. (2022), "Ore Textures and Their Implications for Gold Recovery at Esaase Deposit, Asanko Gold Mine", 7th Biennial International Mining and Minerals Conference, UMaT, Tarkwa , p. 9-10
  8. Adomako-Ansah, K., Zhang, J., Ishiyama, D. and Allen, R.L. (2019), "Genesis of the metamorphosed Boliden Au-rich Massive Sulfide Deposit, Skellefte, Sweden: A water-rock interaction model approach based on wall rock alteration and oxygen isotope values", Annual National Conference of the Ghana Institution of Geoscientists (GhIGCON 2019),
  9. Fiadonu E.B., Hammond, N.Q., Dzigbodi-Adjimah, K. and Adomako-Ansah, K. (2019), "Fluid Inclusion Characteristics in Gold-bearing Quartz veins of the Damang Hydrothermal System, Ghana: Implications for ore depositional Process.", Annual National Conference of the Ghana Institution of Geoscientists (GhIGCON 2019),
  10. Hammond, N.Q., Adomako-Ansah, K., Mizuta, T., Ishiyama, D. and Ogata, T. (2018), "Nature and Origin of Ore-forming Fluids Associated with BIF-hosted Gold Mineralization in the Kraaipan-Amalia Greenstone belt, South Africa.", Resources for Future Generations Conference,
  11. Takechi, T., Ishiyama, D. and Adomako-Ansah (2016), "A Gold Vein from Kibichuo Town, Okayama Prefecture, Japan.", Resource Geology Conference Tokyo, Japan,
  12. Adomako-Ansah, K., Mizuta, T., Ishiyama, D., Hammond, N.Q. and Yamamoto, M. (2016), "Contrasting Study of Two Gold-hosting Banded Iron formation deposits in the Kraaipan-Amalia Greenstone Terrane, South Africa.", Resource Geology Conference, Tokyo, Japan ,
  13. Adomako-Ansah, K., Ishiyama, D. and Allen, R.L. (2015), " Origin of the Zn-Pb-Sb-rich Sulfide-bearing Horizons Found in the Hanging Wall Strata of the Paleoproterozoic Boliden Au-rich VMS Deposit, Sweden.", Resource Geology Conference, Tokyo, Japan,
  14. Adomako-Ansah, K., Mizuta, T., Ishiyama, D., Hammond, N.Q., and Yamamoto, M. (2013), "Archean Banded Iron Formation-hosted Gold Deposit in the Amalia Greenstone Belt: Ore textures and geochemical features of mineralization", Proceedings of ORE GENESIS, Miass, Russia, 6-10
  15. Fujioka, N., Ishiyama, D., Masslennikov, V. and Adomako-Ansah, K. (2013), "Contrasting Characteristics of Ural- and Baimak-type VMS Deposits in the Urals, Russia.", Proceedings of ORE GENESIS, Miass, Russia, 28-32
  16. Adomako-Ansah, K., Mizuta, T., Hammond, N.Q., Ishiyama, D., Ogata, T., and Chiba, H. (2011), "Gold Mineralization in Banded Iron-formation at the Blue Dot Deposit, Amalia Greenstone Belt, South Africa.", Proceedings of Asia Africa Mineral Resources, Fukuoka, Japan,
  17. Adomako-Ansah, K., Mizuta, T., Hammond, N.Q., Ishiyama, D., Ogata, T., and Chiba, H. (2011), "Ore Fluid Constraints on Mineralization at the Blue Dot Gold Deposit, Amalia Greenstone Belt, South Africa.", Proceedings of NRF-JST workshop, South Africa (CD ROM),
  18. Adomako-Ansah, K., Mizuta, T., and Ishiyama, D. (2008), "Latest stage mineralization and its significance on stibnite-bearing hydrothermal veins in the Hishikari epithermal Au–Ag deposit, Kyushu, Japan", Resource Geology Conference, Tokyo, Japan,

Research Conducted

2021--date
Orogenic and/or Intrusion-related Gold Mineralization: Evaluation on Timing of Structural, Magmatic and Metamorphic Fluid Events for the Birimian Granitoid-hosted Gold Systems in the Asankragua Gold Belt, Ghana
2021--date
Characterisation of the Gondama-Mokanji Lateritic Bauxite, Kasila belt, Sierra Leone: Defining the Geological, Mineralogical, and Geochemical Parameters for Ore Enrichment.
2021--date
Isotope geochemistry and geochronology of Li-rich pegmatites in the Central Region of Ghana: Petrogenetic implications for pegmatitic melt fractionation and Basin-type granitoid relationships
2021--date
Petrogenesis of Li-rich and barren pegmatites and their associated rocks in the Cape Coast-Winneba areas: Implications for Li enrichment, vectors to mineralization and exploration
2021--date
Genesis of the Nkran, Akwasiso and Esaasi gold deposits of the Asanko Mine, Asankragua Gold Belt: Integration of Geologic, Structural, Petrographic, Geochemical, Geochronologic and Isotopic constraints on deposits’ styles, ore recovery and target exploration
2020--date
Late Jurassic magmatism and associated Au–Cu polymetallic mineralization in North China Craton, based on U–Pb–Hf–Sr–Nd isotopic studies of the Xiayingfang intermediate-felsic igneous rocks
2020--date
Characterization of barren and gold-bearing Basin-type Granitoids in the Kumasi Basin of Ghana and implications for target exploration: A geological, structural, textural, geochemical and geochronological synthesis
2020--date
Oxygen isotopes and bulk rock geochemistry of the Belt- and Basin-type granitoids: Perspectives for petrogenesis and granitoid nomenclature in Ghana
2019--date
Geological, petrological and geochemical characteristics of the Nabeba BIF-hosted high-grade iron ore deposits, Ivindo, Congo: implication for the genesis of hypogene and supergene mineralization.
2018--date
Significance of ore mineralogical and stable isotopic constraints on the metamorphosed Boliden Au-rich massive sulfide deposit, Sweden: implications for clarification on the genesis and exploration for gold-base metal mineralization.
2010--date
Genesis, relative timing, physico-chemical parameters promoting gold mineralization under different redox conditions in two banded-iron formation gold deposits in the Kraaipan-Amalia greenstone-granitoid terrane of South Africa.
2006--2008
Genesis of the latest stage Au mineralization and its significance on stibnite-bearing hydrothermal veins in the Hishikari epithermal Au–Ag deposit, Kyushu, Japan
2000--2000
Geology of Akrufotoku and surrounding areas, NW Ho, Ghana

Subjects Taught

1. Ore Genesis and Implications for Mineral Exploration
2. Economic/Ore Deposit/Resource Geology
3. Chemistry of Ore-forming Systems: Mineral Thermodynamics, Fluid Inclusions, and Isotope Geochemistry
4. Exploration Geochemistry
5. Ore Mineralogy and Microscopy
6. Exploration Geology
7. Igneous and Metamorphic Petrology
8. Rare Metals and Industrial/Development Minerals
9. Field Mapping (Geology)
10. Field Trip and Report Writing
11. Project Dissertations/Theses

Other Professional Experience

2021--2021
Ghana Chamber of Mines-Tertiary Education Fund (GCM-TEF) Industrial Internship, Exploration and Mine Geology Departments, Asanko Gold Ltd, Ghana
2021--date
Reviewer, Journal of African Earth Sciences
2021--date
Reviewer, Ghana Mining Journal
2020--date
Supervisor/Co-Supervisor, Project Theses, UMaT, Tarkwa, Ghana [PhD: 2; MSc/MPhil: 6; BSc: 14; Dip:1]
2019--date
Internal Examiner, UMaT, Tarkwa, Ghana [PhD: 1; MPhil/MSc: 5]
2019--2019
Technical Expert, Evaluation Panel for the Ministry of Lands and Natural Resources of the Government of Ghana“Evaluation for the Consultancy Services to Conduct Geological Investigation for Identification of Economically Viable Areas for Artisanal and Small-Scale Mining Concessions”,
2019--2019
Moderator, Technical Session 3 of the GhIG Annual Conference, UMaT, Tarkwa
2018--2018
Invited Speaker, SATREPS-E3 International Symposium, Akita University, Akita, Japan
2018--
Reviewer, Geological Journal
2018--date
Reviewer, Geological Quarterly
2015--date
Consultant to Mining and Allied Industries
2015--date
Reviewer, Resource Geology
2014--2018
Postgraduate Research Supervisory Support for Graduate Students , Akita University, Akita, Japan [PhD: 7; MSc: 13]
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