The Rio Del Rey basin located in the Gulf of Guinea is one of the two basins lining the Cameroonian coast. It evolved since the Cenozoic in a tectono-magmatic and seismic complex setting. During the Miocene, this evolution was controlled by tectonics, relative sea level changes, basin filling and mantle dynamics. Two deposit megasequences of second order, MS1 and MS2, were pointed out. MS1 (lower Miocene), aggradational and corresponding to the Isongo turbidites deposited during a period of relative sea level drop registered two sequences of third order differentiated by the degree of channel incision: S1a (Aquitanian–Burdigalian), hardly incised and S1b (Serravallian), moderately incised. A double extension along N–S (Burdigalian) and NE–SW (Serravallian) directions responsible for a set of horsts and grabens, high subsidence and depocentres trending NW–SE affected these sequences. MS2 (middle to upper Miocene), progradational and corresponding to deltaic alternations deposited during a period of creation of available space were controlled by the tilting, wrenching, a second stretching phase and low sedimentary filling. MS2 recorded three cycles of 3rd order: S2a (lower Tortonian), S2b (upper Tortonian) and S2c (Messinian) differentiated by their morphology in ramp for S2a and S2b and slope for S2c. The formation of grabens and horsts and the tilting of the margin coincide with the high activity of the Cameroon volcanic line interpreted as a result of deep mantle dynamics affecting the inner Congo craton lithosphere. This architecture, which differs from those of the other basins of the Gulf of Guinea, partly explains the low oil production of this basin.

位于几内亚湾的里约热内卢盆地是喀麦隆沿岸的两个盆地之一。它是自新生代以来在构造岩浆和地震复杂环境中演化的。在中新世时期，这种演化受构造，相对海平面变化，盆地充填和地幔动力学控制。指出了两个二阶沉积兆序列MS1和MS2。MS1（下中新世），是渐进性的，对应于相对海平面下降期间沉积的Isongo浊石，记录了由航道切口的程度区分的两个三阶序列：S1a（阿基坦-布尔迪加利安），几乎切开和S1b（塞拉瓦利亚） ，适度切开。沿N–S（布尔迪加利安）和NE–SW（塞拉瓦利亚）方向的双重延伸，导致了一系列麻烦和hor锁，NW-SE趋势的高沉降和偏心影响了这些序列。MS2（中新世中期到上新世），是渐进的，并且与在可用空间形成期间沉积的三角洲交替相对应，通过倾斜，扭曲，第二伸展阶段和低沉积充填来控制。MS2记录了三个三阶周期：S2a（较低的Tortonian），S2b（较高的Tortonian）和S2c（Messinian），它们的形态在S2a和S2b的斜坡和S2c的坡度上有所区别。ens和霍斯特的形成以及边缘的倾斜与喀麦隆火山线的高活动相吻合，这是由于深部地幔动力学影响刚果内部克拉通岩石圈的结果。这种建筑与几内亚湾其他盆地的建筑不同，