2016-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/708747摘要：西亞地區新期構造運動之特徵主要受控於現今阿拉伯大陸板塊地向北推擠，最明顯的即是安納托利亞地塊的向西脫曳，以及山脈的南北縮短，分別代表伸張以及壓縮型態的地殼以容納兩板塊的聚合，而小高加索即是處於這兩種應力區間的交界地帶，再加上此處的年輕火山活動以及高度集中的微地震活動，小高加索成為一個絕佳的地點適合研究活斷層及火山構造之間的關係。在過去兩年間，我們陸續在喬治亞及亞美尼亞設置地震站，終於建立由22個寬頻站所組成的一個觀測網涵蓋小高加索山區以及亞美尼亞高原，藉由分析早期舊站資料所得的初步結果已顯示本區的地殼速度與震源機制皆可以獲得相當約束，新的地震觀測網所累積的資料及數年長期的監測將可進一步提升速度模型及地震活動的解析度。期望本計畫能獲得科技部支持，持續維護高加索地震網及國際合作，最後結合各種觀測結果探討地殼應力變化與近場火山和遠場碰撞的關聯性。<br> Abstract: Neotectonic features in western Asia are mainly controlled by the northward impingement of Arabia continental plate. Both the westward extrusion of Anatolia block (extension) and the north-south shortening of mountain belts (contraction) are evidences to accommodate the convergence. The Lesser Caucasus is located at the key place near the transition of these two stress regimes. Moreover, young volcanism and high concentration of the micro-earthquakes make it a unique region to study the relation between active faults and volcanic structure. In the past two years, we had gradually built a seismic array in Georgia and Armenia that well cover the Lesser Caucasus and northern Armenia plateau. Our preliminary study from old array showed that the crustal velocity and focal mechanisms can be well constrained with local stations. The data accumulated from the new installed array and continuous monitoring of the seismicity can further enhance the resolution of velocity models and earthquake locations. With the support from MOST, we can continue to maintain the seismic array in the Caucasus and collaborate with local scientists. We hope to combine all different observations to understand the variation of crustal stress that maybe linked to near-field volcanoes and far-field collision.大陸碰撞震源機制接收函數應力火山微地震造山活動continental collisionfocal mechanismreceiver functionstressvolcanomicro-earthquakemountain building