Assessment of Lateritic Gravelled Materials for Use in Road Pavements in Cameroon     

Foko Tamba  Carlos  Kengni  Lucas  Tematio  Paul  Manefouet  Bertile Ilalie  Kenfack  Jean Victor 《Geotechnical and Geological Engineering》2022,40(8):4195-4215

Geotechnical and Geological Engineering - Early surface and structural deterioration of new pavements are becoming increasingly perceptible in Cameroon. This raises serious concerns regarding the...  相似文献   

A geostatistical re-interpretation of gravity surveys in the Yagoua,Cameroon region     

Philippe Njandjock Nouck  Chamberlin Kenfack  Ahmad Diab Diab  Kasi Njeudjang  Larissa Jorelle Meli’I  Rodrigue Kamseu 《Geofísica Internacional》2013,52(4):365-373

Since 1960, many gravity studies have been carried out in the Yagoua region of northern Cameroon. Gravity data was collected over a wide area of approximately 11628 km². These data are insufficient, irregular, scattered and do not efficiently permit gravity field downward and upward continuations, derivatives and other operations that might require regular gridded data. Some anomalies on the Collignon map (1968), may correlate with known geological structure but do not appear on maps by Louis (1970) and Poudjom et al. (1996). To produce regular gridded gravity data and better control anomalies due to geological structures, the kriging method was applied to a 188-data baseline. Several variogram models were tested for this purpose. It was found that a spherical variogram model is the best; it has produced a new kriging dataset of about 10,100 data and a new map of kriged Bouguer data. This map contains positive anomalies in the Maroua-Mindif and Maga areas on the Collignon (1968) map, which were not present on Louis (1970) and Poudjom et al. (1996) maps. The positive anomalies of Guibi-Doukoula and Yagoua, not separated on the Louis (1970) and Poudjom et al. (1996) maps, show up as clearly distinct as previewed by Collignon (1968). The new results can be used for subsequent gravimetric studies.  相似文献