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題名:A SIMPLIFIED SLAB PULL MODEL: AN EXAMINATION INTO THE OCCURRENCE AND RECURRENCE OF GREAT INTERPLATE SUBDUCTION EARTHQUAKES    
一個簡化的下衝板塊拉力模式:對板塊間隱沒性大地震發生及其發生循環之檢視
著者:Gwo-Shyh Song(宋國士) ;Brain T. R. Lewis(路易士)
出版地區:台灣
出版城市:台北市
學科:地球科學
刊名:ACTA Oceanographica Taiwanica
卷期:25期(1990.3)
頁碼:1-18
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

現今隱沒作用範本的主要營力是由於較冷且重的板塊,沉入較熱且輕的地函。這個力將在地函中受到黏性力及在大地震發生之「海溝」地域內受到摩擦力的阻擋。本報告的簡化模式,對於這種隱沒過程的表現,是一個靜置於平板上的質體(m2),其一端由彈簧(彈性常數為k)連接至一個沉入黏性係數η流體的質體(m1)所產生的拉力運動。置於平板上的質體m2和平板間的靜摩擦係數為fs,動摩擦係數為fd。於物理和數學的推演上,這簡化模式提供了質體m2週期性的瞬間滑動行為,此行為可代表隱沒作用中「黏附-滑動」的運動過程。 黏性係數η為控制隱沒速率的最主要因素,楊氏模數E(即彈簧之彈性常效k)決定瞬間滑動之位移量。另外η/E比值可初步估計瞬間滑動行為的再發生率。 當這簡化模式代入地球參數系統中,它能合理地預估隱沒帶大地震發生的週期時間,並發現其和觀測的地震週期相吻合。這模式並可進一步對控制發生循環的臨界因素給予一有效的探察。
In the current subduction paradigm the principal force is hat due to the cold, dense plate sinking into the less dense hot mantle. This Force is resisted by viscous Forces in the mantle and by frictional forces in the "trench" region where large subduction earthquakes occur. In our simplified model this process is represented by a mass (m2) resting on a horizontal plate, with the mass (m2) being pulled by a spring (of constant k) connected to another mass (m1) sinking into a fluid of viscosity η. The mass m2 on the plate has a static coefficient of friction fs, and a dynamic coefficient fd. Both physical and mathematical realizations of this model produce periodic slipping of the mass m2, that represents tile stick-slip process of subduction. Viscosity η is the dominant factor controlling the subduction rate, Young's modulus E (k of the spring) determines the displacement of slipping, and to first order the ratio η/E controls the recurrence rate of slipping. Application of this model to a system with earth-like properties gives estimates of earthquake recurrence times that are in reasonable agreement with actual subduction zones. The model also gives insight into the critical factors controlling recurrence rates.




本卷期目次
ACTA Oceanographica Taiwanica 25期 (1990.3)
A SIMPLIFIED SLAB PULL MODEL: AN EXAMINATION INTO THE OCCURRENCE AND RECURRENCE OF GREAT INTERPLATE SUBDUCTION EARTHQUAKES/ Gwo-Shyh SongBrain T. R. Lewis
使用Autosal鹽度儀的精密鹽度測量之探討Ⅰ.實驗室測試/ 方天熹林上發劉康克
STRATIGRAPHY, STRUCTURE AND TECTONIC HISTORY OF TAINAN BASIN OFF SOUTHWEST TAIWAN/ Ho-Shing Yu
A TRANSECT ACROSS THE THERMOHALINE FRONT NORTH OF TAIWAN IN WINTERTIME/ Joe WangChing-Sheng Chern
ON THE KUROSHIO BRANCH CURRENT NORTH OF TAIWAN/ Ching-Sheng ChernJoe Wang
RELATIONSHIPS AMONG THE SPECIES AND FORMS OF COPPER AND BIOMASS ALONG THE ERHJIN CHI COASTAL WATER/ Tsu-Chang HungAileen ChuangShu-Jen WuCharley C. H. Tsai
A STUDY ON TYPHOON SWELL HEIGHT PREDICTION/ Nai Kuang Liang
1989年六月橫過臺灣東南外海黑潮海域200公尺水深內之浮游性有孔蟲族?/ 謝英宗陳民本
NOAA衛星HRPT資料接收系統自動化及其對臺灣東北海域表水溫分布之初步監測研究/ 林志遠徐崇仁
 
   
 
   

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