The Mustafakemalpaşa Fault (MF), located among Manyas, Ulubat and Orhaneli faults, is a right lateral strike-slip and 47 km in length. The MF begins with a pressure ridge at the west and exhibits complex jog terminations at east ends in restraining left stepovers. The western section of the fault bounds Miocene and Quaternary units and continues towards İlyasçılar. The central segment of the fault, starts with approximately 750-m leftward stepover, exhibits a sinusoidal geometry between Kapaklıoluk and Kabulbaba. In this section, MF traverses mountainous terrain and cuts Ophiolite, Jurassic limestones and Miocene detritals, forming dextral faulting features and gaining reverse component. The eastern section exhibits left stepping en-echelon pattern and consists 2.5-km offset on the Orhaneli River. In this study, palaeoseismological findings related to the Holocene activity and active tectonic properties of the MF are presented. The trenches exposed mismatched stratigraphy, demonstrating evidence of events across the fault. We identified three events (before BC 2190, later AD 1425 and 1850) that have occurred during the past 4000 years. We suggest a long non-characteristic recurrence interval and ~0.7 mm/y slip-rate for MF, based on trench data and offset of the Late Pliocene drainage of Orhaneli River.

中文翻译：

---

Mustafakemalpaşa断层西段的活动构造和古地震特征；布尔萨，西北安纳托利亚

Mustafakemalpaşa 断层（MF）位于Manyas、Ulubat 和Orhaneli 断层之间，是一条右侧走滑，长47 公里。MF 以西侧的压力脊开始，并在东端显示复杂的缓动终止以限制左跨步。断层的西段界定了中新世和第四纪单元，并继续向 İlyasçılar 延伸。断层的中心段从大约 750 米的左步开始，在 Kapaklıoluk 和 Kabulbaba 之间呈现正弦几何形状。本段MF穿越山地，切割蛇绿岩、侏罗系灰岩和中新世碎屑，形成右旋断层特征，获得逆向分量。东段呈左阶梯状排列，在奥尔哈内利河上偏移 2.5 公里。在这项研究中，介绍了与全新世活动和 MF 的活动构造特性相关的古地震学发现。海沟暴露了不匹配的地层，证明了穿越断层的事件的证据。我们确定了过去 4000 年发生的三个事件（公元前 2190 年之前，公元 1425 年和 1850 年之后）。我们建议根据沟渠数据和 Orhaneli 河晚上新世排水系统的偏移，MF 的非特征性复发间隔较长，滑移率约为 0.7 mm/y。