Publications


2009

Nyambok, IO.  2009.  Petrology and geochemistry of the alkaline intrusion, Jombo Hill, Kenya. AbstractPetrology and geochemistry of the alkaline intrusion, Jombo Hill, Kenya

The field occurrence and the known immiscibility between silicate and carbonate melts suggest the Jombo alkaline intrusion and Mrima carbonatite intrusion have come from the same magmatic source. However, only the ijolite series apparently originated from a magma body at Jombo hill intrusion, while the feldspathoidal syenite series appears to have resulted from metasomatic alteration of the country rock-sandstone. The K/Rb ratios seem to indicate a mantle origin for the ijolites and a crustal one for the feldspathoidal syenites. The feldspathoidal syenite series were presumably formed by alkali metasomatism, resulting from magmatic fluid infiltration through intergranular movement. It is suggested that the partitioning of K and Na components in the metasomatizing fluid and solid feldspar phases at different temperatures, was the cause of two rock types – albite nepheline syenite and orthoclase nepheline syenite.

2000

O, PROFNYAMBOKISAAC.  2000.  Ground subsidence and its socio-economic implications on the population: A case study of Nakuru area in Central Rift Valley, Kenya.. Environmental Geology. 39(6), 567-574.. : Wiley Interscience Abstract
Vertex epidural haematomas (VEDH) are rare and difficulties are encountered in diagnosis and management. This is a case report of a patient with a vertex epidural haematoma who presented with signs of severe head injury with upper limb decerebrate posture. We discuss the challenges of radiological investigation and neurosurgical management of VEDH.

1999

O, PROFNYAMBOKISAAC.  1999.  The lithospheric structure of the Kenya Rift as revealed by wide-angle seismic measurements.. In: Mac Caill, C. and Ryan, P.D. (eds). Continental Tectonics. Geological Society, London, Special Publications. 164, 254-269.. : Wiley Interscience Abstract
Vertex epidural haematomas (VEDH) are rare and difficulties are encountered in diagnosis and management. This is a case report of a patient with a vertex epidural haematoma who presented with signs of severe head injury with upper limb decerebrate posture. We discuss the challenges of radiological investigation and neurosurgical management of VEDH.

1998

Oni, EA, Ayoade JO, Owolabi IE.  1998.  Advances in Geodesy and Geophysics Research in Africa. Website
O, PROFNYAMBOKISAAC.  1998.  Current state-of-the-art, problems and preliminary results of seismic hazard assessment in sub-Saharan Africa.. In: Bormann, P. (Editor). Regional International Training Course Volume (1997) on Seismology and Seismic Hazard Assessment. Scientific Technical Report STR 98/05. Potsdam. 262-271.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1998.  Neotectonics and stress pattern in Africa.. In: Bormann, P. (Editor). Regional International Training Course Volume (1997) on Seismology and Seismic Hazard Assessment. Scientific Technical Report STR 98/05. Potsdam. 177-181.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1998.  Quaternary volcanic events in Africa. In: Bormann, P. (Editor). Regional International Training Course Volume (1997) on Seismology and Seismic Hazard Assessment. Scientific Technical Report STR 98/05. Potsdam. 182-190.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1998.  Controlled source seismic experiments in Kenya.. Proc. 1997 IGCP 400 (Continental Rifts) Workshop, Dublin, Eire,pp 38-41.. : Wiley Interscience Abstract
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1997

O, PROFNYAMBOKISAAC.  1997.  The KRISP 94 lithospheric investigation of southern Kenya - the experiments and their main results.. In: Fuchs, K., Altherr, R., Muller, B. and Prodehl, C. (Editors). Special Issue: Structure and Dynamic Processes in the Lithosphere of the Afro-Arabian Rift System. Tectonophysics, 278: 121-147.. : Wiley Interscience Abstract
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1996

Legge, PL, Barongo JO, Opiyo-Aketch N, Mathu EM, Nyambok IO.  1996.  Development in earth Science Education in East Africa.. Website
O, PROFNYAMBOKISAAC.  1996.  Geology in a Sustainable Environment.. GSA 95 International Conference Proceedings.Editors(eds.)1998. Advances in geodesy and geophysics in Africa. ICESA 489p.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1996.  The structure of the Kenya Rift from wide-angle seismic measurements.. In: Nyambok, I.O. and Ichang'i, D.W. (Editors). Geology for Development in a Sustainable Environment. GSA 95 International Conference Proceedings. 287-304.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1996.  Satellite imagery study of the tectonic setting of a volcano: Menengai caldera in the Kenya Rift.. In Nyambok, I.O. and Ichangi D.W.(Editors). Geology for Development within a Sustainable Environment. GSA 95 International Conference Proceedings. 667-675.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1996.  Impact of earthquakes and volcanic eruptions on the environment.. In Wandiga S.O. and Abuodha N.L. (Editors) Environment and Development. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1996.  Microprobe and X-ray diffraction analyses of the major minerals from the Jombo Hill alkaline rocks in Kenya.. Kenya Journal of Sciences. Series A. Vol. 10(i): 40-59. : Wiley Interscience Abstract
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1995

O, PROFNYAMBOKISAAC.  1995.  Group takes a fresh look at the lithosphere underneath southern Kenya,. KRSIP Working Group EOS Transactions, AGU 76, 81-82.. : Wiley Interscience Abstract
(including Nyambok, I.O.), .
O, PROFNYAMBOKISAAC.  1995.  Seismic images illustrate the deep roots of the Chyulu Hills volcanic area, Kenya.. EOS. Vol. 76, No. 28, 273-278.. : Wiley Interscience Abstract
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1994

O, PROFNYAMBOKISAAC.  1994.  Rifting of the Continents:. A keyproject of the International Lithospere Program. Tectonophysics, 236, 1-2.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1994.  The East African rift system in the light of KRISP 90.. Tectonophysics, 236, 465- 483.. : Wiley Interscience Abstract
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1993

O, PROFNYAMBOKISAAC.  1993.  Geosciences and the Environment,. Nairobi University Press. 179P.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1993.  The late Proterozoic Yatta Shear Zone: A possible lateral ramp extending across the Kenya Rift.. In Opiyo-Aketch (Editor): Proceedings of the 5th Conference of the Geology of Kenya. Geological Society of Kenya Publication. 69-77.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1993.  Hydrogeology and hydrochemistry of the groundwater resources of the floor of the Rift Valley, Nakuru North, Kenya. In Opiyo-Aketch (Editor):. Proccedings of the 5th Conference of the Geology of Kenya. Geological Society of Kenya Publication. 92-100.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1993.  A re-evaluation of the geology and tectonics of the granitoid plutons around Kakamega town, Western Kenya.. In Opiyo-Aketch (Editor):Proccedings of the 5th Conference of the Geology of Kenya. Geological Society of Kenya Publication. 63-68.. : Wiley Interscience Abstract
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1992

O, PROFNYAMBOKISAAC.  1992.  The Murang'a landslide, Kenya.. Environmental Geology and Water Sciences. Vol. 21. 19-21. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1992.  Oldoinyo Lenkiyio Range: Geology, geomorphology and hydrographic pattern of the.. In Kenya from Space. A contribution to a CREDU publication. East African Educational Publishers. 116-119. Nairobi.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1992.  Lake Turkana area: Tectonics and geology.. In Kenya from Space. CREDU, France. East African Educational Publishers. 96-99. Nairobi.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1992.  Chyulu Hills and Yatta Plateau geology.. In Kenya from Space. CREDU, France. , Nairobi. East African Educational Publishers. 124-127. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1992.  Mount Kenya: A Landsat structural and geomorphological interpretation.. In Kenya from Space. CREDU, France. East African Educational Publishers. 16-23. Nairobi.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1992.  Naivasha: Geology and natural resources.. In Kenya from space. East African Educational Publishers. 60-62. Nairobi.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1992.  Magadi: Geology of the Kedong Valley.. In Kenya from Space. CREDU, France. East African Educational Publisher. 140-143, Nairobi.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1992.  Geology of Kenya from Landsat mosaic.. In Kenya from Space. CREDU, France. East African Educational Publishers, 12-15, Nairobi.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1992.  Seismology and Related Sciences in Africa.. Tectonophysics Special Issue, Vol. 209 Nos. 1-4, Elsevier. 337p.(editors). : Wiley Interscience Abstract
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1991

Nyambok, IO, Konoti HW, Nzioki NM.  1991.  Center For Urban Research Print Series Presents.. Website
O, PROFNYAMBOKISAAC.  1991.  Petrology, geochemistry and evaluation of the heavy mineral deposits in Malindi and Uganga shore areas.. Marine Mining. Vol. 10, 337-351.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1991.  New insight into structure, dynamics and composition of the lithosphere of the East African rift in Kenya from an integrated seismic experiment(Abst.).. KRISP 89-90.IUGG General Assembly, Vienna, Austria.. : Wiley Interscience Abstract
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O, PROFNYAMBOKISAAC.  1991.  Large-scale variation in lithospheric structure along and across the Kenya rift.. KRISP Working Group Nature vol. 354.223-227.. : Wiley Interscience Abstract
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1990

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