为了利用地球物理资料研究塞萨尔盆地及邻区构造特征,系统搜集整理了研究区已有的重力资料。根据布格重力异常,采用最小曲率位场分离方法、归一化总水平导数垂向导数方法(NVDR-THDR)识别出断裂信息,结合地质地球物理资料,重点分析了主...为了利用地球物理资料研究塞萨尔盆地及邻区构造特征,系统搜集整理了研究区已有的重力资料。根据布格重力异常,采用最小曲率位场分离方法、归一化总水平导数垂向导数方法(NVDR-THDR)识别出断裂信息,结合地质地球物理资料,重点分析了主要断裂的地质地球物理特征,确定了研究区内的断裂体系。研究发现,研究区内主要发育近EW向、NNW向、NW向和NE向4组断裂,认为Oca走滑断裂向西延伸至海区内,推测了SMB走滑断裂和Algarrobo走滑断裂平面位置;认为不同走向的4组断裂控制了研究区的构造格架,使之整体呈"倒三角"型,"倒三角"内分西、中和东3个构造块体,块体间以断裂为界分别为Santa Marta岩体、塞萨尔盆地和Sierra de Perija山;最后,结合断裂分布、基底特征及前人研究,重新推测了塞萨尔盆地的边界,其边界均受断裂所限,盆地范围向南、向西扩展;盆地内部,断裂F8、F9将盆地划分为北部坳陷、中部隆起和南部坳陷3个次级构造单元。展开更多
This research shows a noticeable comparison between slide zones produced with the results using the Nilsen method with active tectonic hazard zonation map. A determination landform of geometry or morphometry factors i...This research shows a noticeable comparison between slide zones produced with the results using the Nilsen method with active tectonic hazard zonation map. A determination landform of geometry or morphometry factors is one of the best methods for study and evaluation active tectonics. The first image provided is a Dem maps from GIS software showing topography, geology and tectonic maps participant with field activities. The second image provided shows an active tectonic map also generated by the same above mentioned factors into three classes A, B, C, D and a landslide hazard zonation map which shows five classes: Stable zone, generally stable zone, stable moderately stable zone, moderately stable zone and talented to liquefaction zone. The study and comparison and conformity landslide hazard zonation map with hazard zonations into active tectonic hazard zonation map showed about 79 percent (56,880 hectare) moderately unstable zone and talented for liquefaction zone settled in A zone (very high tectonic activity) and B zone (high tectonic activity) active tectonic map and 21 percent (15,130 hectare) remain unsettled sequential 12 percent (8640 hectare) and 9 percent (6480 hectare) in C (moderate tectonic activity), D (lowest tectonic activity) zone of active tectonic hazard zonation produced from above mentioned factors. This research showed a relationship between slide zones produced in landslide hazard zonations using the Nilsen method to measure active tectonic hazard zonation in the study region.展开更多
文摘为了利用地球物理资料研究塞萨尔盆地及邻区构造特征,系统搜集整理了研究区已有的重力资料。根据布格重力异常,采用最小曲率位场分离方法、归一化总水平导数垂向导数方法(NVDR-THDR)识别出断裂信息,结合地质地球物理资料,重点分析了主要断裂的地质地球物理特征,确定了研究区内的断裂体系。研究发现,研究区内主要发育近EW向、NNW向、NW向和NE向4组断裂,认为Oca走滑断裂向西延伸至海区内,推测了SMB走滑断裂和Algarrobo走滑断裂平面位置;认为不同走向的4组断裂控制了研究区的构造格架,使之整体呈"倒三角"型,"倒三角"内分西、中和东3个构造块体,块体间以断裂为界分别为Santa Marta岩体、塞萨尔盆地和Sierra de Perija山;最后,结合断裂分布、基底特征及前人研究,重新推测了塞萨尔盆地的边界,其边界均受断裂所限,盆地范围向南、向西扩展;盆地内部,断裂F8、F9将盆地划分为北部坳陷、中部隆起和南部坳陷3个次级构造单元。
文摘This research shows a noticeable comparison between slide zones produced with the results using the Nilsen method with active tectonic hazard zonation map. A determination landform of geometry or morphometry factors is one of the best methods for study and evaluation active tectonics. The first image provided is a Dem maps from GIS software showing topography, geology and tectonic maps participant with field activities. The second image provided shows an active tectonic map also generated by the same above mentioned factors into three classes A, B, C, D and a landslide hazard zonation map which shows five classes: Stable zone, generally stable zone, stable moderately stable zone, moderately stable zone and talented to liquefaction zone. The study and comparison and conformity landslide hazard zonation map with hazard zonations into active tectonic hazard zonation map showed about 79 percent (56,880 hectare) moderately unstable zone and talented for liquefaction zone settled in A zone (very high tectonic activity) and B zone (high tectonic activity) active tectonic map and 21 percent (15,130 hectare) remain unsettled sequential 12 percent (8640 hectare) and 9 percent (6480 hectare) in C (moderate tectonic activity), D (lowest tectonic activity) zone of active tectonic hazard zonation produced from above mentioned factors. This research showed a relationship between slide zones produced in landslide hazard zonations using the Nilsen method to measure active tectonic hazard zonation in the study region.
