基于多源遥感数据研究沂沭断裂带几何展布及构造地貌特征

Distribution and tectonic geomor phology characteristics of Yishu Fault Zone based onmulti-source remote sensing data

本文利用ETM+、资源三号等多源遥感数据,经过镶嵌、增强及融合等一系列影像处理,对沂沭断裂带(郯庐断裂带山东带)的几何展布及构造地貌特征进行了详细的解译。研究表明,沂沭断裂带总体走向NNE,主要由5条主干断裂组成,分别是鄌郚-葛沟断裂(F1)、沂水-汤头断裂(F2)、白芬子-浮来山断裂(F3)、昌邑-大店断裂(F4)及安丘-莒县断裂(F5),遥感影像上形成两堑一垒的构造地貌格局,而每条断裂均有明显的遥感构造地貌特征,表现为线性特征、色调差异、串珠状湖泊分布、断层陡坎、断层陡崖、断塞塘等现象,其中安丘-莒县断裂(F5)在构造地貌上具有历史地震地表破裂、断层陡坎与冲沟同步右旋位错等较新的活动现象,表明该断裂为现今5条主干断裂中构造活动性最强的一条,对强震的发生具有明显的控制作用。

The paper uses multi-source remote sensing data,such as ETM+,resources no.3,after mosaic,enhancement and fusion,to do a detailed interpretation for Yishu Fault Zone(Tanlu Fault zone in Shandong)in terms of geometric distribution and tectonic geomorphology.Research shows that the overall trend of Yishu Fault Zone is NNE,it consists of five main faults,includingTangwu-Gegou fault(F1),Yishui-Tangtou fault(F2),Baifenzi-Fulaimountain fault(F3),Anqiu-Juxian fault(F5),and Changyi-Dadian fault(F4),the remote sensing image displayed ageomorphic pattern of two-graben and a host,and each fault has obvious remote sensing tectonic geomorphology features,showing various kinds of phenomena,such as the linear characteristics,color difference,beaded lakes,fault scarp,fault cliff,broken plug pond,and so on.The Anqiu-Juxian fault(F5)showed some phenomena of recent activities,such as synchronized right-lateral dislocation of the surface rupturesof historical earthquakes,fault scarps,andgullies,indicating that this fault is the most active one among the five major faults and has a significant controlling effect on the occurrence of strong earthquakes.