學術資源整合系統-相關推薦
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| 作者 | Chung, Ling-Ho;Chen, Yue-Gau;Yu, K.;Cao, Zhongquan;Yin, Gongming |
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| 出版日期 | 201012 |
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| 著作名稱 | New geomorphic evidence probably provided by recent activities of the Gyaring Co Fault, Central Tibet
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| 會議論文集 | 2010AGU Fall Meeting |
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| 頁數 | T11B-2087 |
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| 會議地點 | 舊金山 |
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| 國際性會議 | Y |
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| 主題 | 地質 |
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| 摘要 | The Gyaring Co Fault is one of the most active en echelon minor faults of the Karakoram-Jiali Fault zone (KJFZ) in the Tibetan Plateau. These minor en echelon faults have been affirmed as active right-lateral strike-slip faults, striking N120°-130°E. The Gyaring Co Fault is one of above-mentioned faults. According to previous study, the slip rate of it is about 10-20 mm/yr. A M7 event occurred in 1934 along the southern Gyaring Co Fault, while little has been known for the northern segment. Based on recent analysis by high resolution satellite images, we found various offset river channels to suggest the northern segment is still active as its southern counterpart. The evidence includes a number of 10- 12m offset or bending small creeks on the Quaternary terraces, which are perhaps produced by the last large earthquake event along the northern segment. Also found are ten meters to kilometer scale displacements, which are generally identified by larger river and must be cumulative offsets. For the purpose of deriving slip rates along this segment, dating methods of OSL, 10Be, and Radiocarbon are applied in this study. By the new findings along the Gyaring Co Fault, it can be further affirmed that the above-mentioned en echelon minor faults may play as southern boundary zone that marks. a fast eastward moving block in the Central Tibet. The recently published GPS velocities, showing a relatively large WNW-ESE extension rate of ~22 ± 3 mm/yr within the Tibetan plateau, also supports our finding. However, the northern boundary zone of this block still need further work to unravel. |
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| 資料連結 |  |
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| 系統號 | NO000004569 |
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