| Plume–lithosphere interaction and the origin of continental rift-related alkaline volcanism—the Chyulu Hills volcanic province, southern Kenya A Späth, AP Le Roex, N Opiyo-Akech Journal of Petrology 42 (4), 765-787, 2001 | 234 | 2001 |
| A reappraaisal of the geology, geochemistry, structures and tectonics of the Mozambique belt in Kenya, east of the rift system CM Nyamai, EM Mathu, N Opiyo-Akech, E Wallbrecher African Journal of Science and Technology 4 (2), 51-71, 2003 | 46 | 2003 |
| A reappraaisal of the geology, geochemistry, structures and tectonics of the Mozambique belt in Kenya, east of the rift system CM Nyamai, EM Mathu, N Opiyo-Akech, E Wallbrecher African Journal of Science and Technology 4 (2), 51-71, 2003 | 46 | 2003 |
| Geochemistry of basement rocks from SE Kenya and NE Tanzania: indications for rifting and early Pan-African subduction AH Bauernhofer, CA Hauzenberger, E Wallbrecher, S Muhongo, ... International Journal of Earth Sciences 98, 1809-1834, 2009 | 36 | 2009 |
| The petrology of the Chyulu Hills volcanic province, southern Kenya A Späth, AP Le Roex, N Opiyo-Akech Journal of African Earth Sciences 31 (2), 337-358, 2000 | 26 | 2000 |
| Geological and structural influence on groundwater distribution and flow in Ngong area, Kenya JK Mulwa, SJ Gaciri, JO Barongo, N Opiyo-Akech, GK Kianji African Journal of Science and Technology 6 (1), 2005 | 20 | 2005 |
| Petrology and geochemistry of granites from the Archaean terrain north of Lake Victoria, western Kenya N Opiyo-Akech, J Tarney, M Hoshino Journal of African Earth Sciences 29 (2), 283-300, 1999 | 19 | 1999 |
| General geology of Kenya NO Akech, CA Omuombo, M Masibo Developments in Earth Surface Processes 16, 3-10, 2013 | 15 | 2013 |
| Pan-African high pressure granulites, Taita hill-Tsavo East national park, Kenya CA Hauzenberger, G Hoinkes, AH Bauernhofer, E Wallbrecher, H Fritz, ... Journal of African Earth Sciences 30 (4), 37, 2000 | 11 | 2000 |
| Geochemistry and tectonomagmatic affinities of the Mozambique belt intrusive rocks in Matuu-Masinga area, central Kenya CM Nyamai, N Opiyo-Akech, SJ Gaciri, H Fujimaki Gondwana Research 2 (3), 387-399, 1999 | 10 | 1999 |
| Gully erosion in western Kenya M Hoshino, Y Katsurada, K Yamamoto, H Yoshida, M Kadohira, ... The Journal of the Geological Society of Japan 110 (2), III-IV, 2004 | 9 | 2004 |
| Soil erosion and conservation in Western Kenya M Hoshino, M Kadohira, K Yamamoto, H Yoshida, K Sugitani, ... Research project report, 2006 | 6 | 2006 |
| Imaging saltwater intrusion into coastal aquifers with electrical resistivity tomography at Lamu Island, south coast Kenya ZN Kuria, T Woldai, N Opiyo-Akech AJST 11 (2), 2010 | 5 | 2010 |
| Conditions of Pyroxene Crystallization and Thermobarometry of the Neoproterozoic Mozambique belt intrusive rocks of Matuu-Masinga area, central Kenya CM Nyamai, SJ Gaciri, N Opiyo-Akech, B Johansson, Y Sato | 5 | 2002 |
| Geology and geochemistry of the late Archaean greenstone associations, Maseno Area, Kenya N Opiyo-Akech PQDT-UK & Ireland, 1988 | 5 | 1988 |
| Science, Research and Innovation for Harnessing the Blue Economy GO Outa, PM Osano, M Muchiri, J Njiru, P Kagwanja, NO Akech, ... Nairobi: Government of Kenya & Stockholm Environment Institute-Africa Centre, 2021 | 4 | 2021 |
| A Reappraisal of the Geology, Structures and Tectonics of the Mozambique Belt in Kenya East of the Rift System CM Nyamai, EM Mathu, E Wallbrecher, N Opiyo-Akech Gondwana Research 4 (4), 720, 2001 | 3 | 2001 |
| Petrography, mineral chemistry and thermobarometry of the Neoporoterozoic Mozambique belt rocks of Matuu-Masinga area, central Kenya CM Nyamai, N Opiyo-Akech, SJ Gaciri, B Johansson, Y Sato Proceedings of the International Seminar on Precambrian Crust in Eastern and …, 2000 | 3 | 2000 |
| Geochemical evidences for the tectono-magmatic emplacement of the Kenyan greenstone belt rocks from the Maseno area, western Kenya N Opiyo-Akech University of Nairobi., 1991 | 3 | 1991 |
| The impacts of human activities on Africa's coastal and marine areas and the implications for sustainable development. N Opiyo-Akech, DO Olago, EW Dindi, MM Ndege University of Nairobi, 2002 | 2 | 2002 |
