TY - JOUR AU - Nguiya, Sévérin AU - Lemotio, Willy AU - Njandjock Nouck, Philippe AU - Pemi, Marcelin M. AU - Tokam, Alain-Pierre K. AU - Ngatchou，Evariste PY - 2019 DA - 2019/06/02 TI - 3 d镁铁质地形之间的过渡区西北边界刚果克拉通和Kribi-Campo沉积盆地的重力反演SP - 7982562六世- 2019 AB -结构之间的过渡区西北边界刚果克拉通和Kribi-Campo沉积basin is still a matter of scientific debate. In this study, the existing gravity data are interpreted in order to better understand the geodynamics of the area. Qualitatively, results show that the major gravity highs are associated with long-wavelength shallow sources of the coastal sedimentary basin, while large negative anomalies trending E-W correlate to low dense intrusive bodies found along the northern limit of the Congo Craton. For the delineation of the causative sources, the gravity anomalies have been inverted based on the Parker-Oldenburg iterative process. As inputs, we used a reference depth of 20 km obtained by spectral analysis and successively, the density contrasts 0.19 g/cm^3.和0.24克/厘米^3.，根据现有的一维横波速度模型推导。结果表明，基性界面地形不规则，以地垒和地堑构造序列为特征，基性深度在15.6 ~ 23.4 km之间。较浅的深度(15.6-17 km)与基性界面向上地壳隆起有关。这一侵入可能是在太古代Ntem地壳扩张期间，导致海岸沉积盆地下的大陆地壳变薄。克拉通下基性界面的沉降是由位于Matomb和Ebolowa下的2个相似的地堑构造实现的，最大深度为23.4 km。中间深度(18-22 km)与沿Pouma-Bipindi地区的缝合带相对应。该地区一些滑坡的位置与刚果克拉通的北缘相吻合，表明这一边缘也可能对其发生产生影响。这项工作为地球动力学、区域构造学和盆地几何学提供了新的见解。SN - 1687-885X UR - https://doi.org/10.1155/2019/7982562 DO - 10.1155/2019/7982562 JF - International Journal of Geophysics PB - Hindawi KW - ER -