Tectonically induced coastal uplift mechanism of Gökçeada Island, Northern Aegean Sea, Turkey
Tectonically induced coastal uplift mechanism of Gökçeada Island, Northern Aegean Sea, Turkey
复制标题
土耳其北爱琴海 Gökçeada 岛构造诱发的海岸隆起机制
DOI：
10.1016/j.quaint.2008.04.001
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发表时间：
2009
影响因子：
2.2
通讯作者：
Nurullah Hanilçi
中科院分区：
文献类型：
--
作者：
H. Koral;H. Öztürk;Nurullah Hanilçi
本文提出了沿海隆起的证据Gökçeada（原İmbros）岛，位于爱琴海北部，靠近沿地震活跃的北安纳托利亚断层（NAF）的深槽。该岛由2公里厚的沉积层组成，下面是变质岩，与在strandzhar - rhodope山脉以北170公里处观察到的沉积层相似。沉积地层自下而上为始新世浊积岩和灰岩，向上为渐新世-下中新世碎屑岩和安山岩火山碎屑岩，顶部为上中新世-上新世松散固结砂岩。其最东岸的岛屿呈准平原状。然而，它的北部是多山的，有陡峭的海岸悬崖，隆起的古海岸缺口，悬空山谷，泉水，瀑布，未胶结的斜坡沉积物，石灰华地层和暴露的断裂带。许多海岸形态、地质和构造特征的野外证据以及相应的地震反射数据表明，该岛经历了沿NAF的Saros海槽的快速隆起（即垂直位移）。自上新世（或一些研究认为的晚更新世）NAF开始以来，总的隆升幅度在几公里左右，根据该主要断层的年龄，年增长率从几毫米到一厘米不等。
This paper presents evidence of coastal uplift on Gökçeada (formerly İmbros) Island, situated in the northern Aegean Sea in proximity to a deep trough along the seismically active North Anatolian Fault (NAF). The island comprises 2km thick sedimentary strata underlain by metamorphic rocks which are similar to those observed 170km to the north in the Strandzha–Rhodope Mountains. The sedimentary strata begin at the bottom with Eocene turbidites and limestones, continue upward with Oligocene–Lower Miocene detritial rocks and andesitic volcanoclastics, and end with loosely consolidated sandstones of the Upper Miocene–Pliocene at the top. The island at its extreme eastern coast has a peneplain form. However, at its northern part it is mountainous and has steeply inclined coastal cliffs, uplifted paleo-shore notches, hanging valleys, springs, waterfalls, uncemented slope deposits, travertine formations, and exposed fault scarps. Field evidence of many coastal morphological, geological and tectonic features together with corresponding seismic reflection data suggest that the island has experienced a rapid uplift (i.e. vertical displacement) with respect to the Saros Trough along the NAF. Total uplift is on the order of a few kilometers since the initiation of the NAF during Pliocene (or late Pleistocene as suggested by some studies), and the yearly rate varies from a few millimeters to a centimeter according to the age assumed for this major fault.