澎湖桶盤嶼地質公園基準資料庫建置之研究

Forming and Testing a Baseline Database of the Columnar Basalt on Tongpan, Penghu Marine Geopark

關德倫(Ciaran Gruendemann)

指導教授 ： 林俊全

國立臺灣大學/理學院/地理環境資源學研究所/碩士(2013年)

https://doi.org/10.6342/NTU.2013.10239

摘要

無資料

關鍵字

監測基準 ； 柱狀玄武岩 ； 塊體崩落 ； 頂部崩落 ； 基準資料庫

並列摘要

Columnar basalt landscapes hold a fascination that transcends geographical and cultural boundaries. It is because of this that they feature so prominently on the global register of significant geomorphosites. Arguably the most iconic of these basalt landscapes in Taiwan is Tongpan Island, a status recognized by its inscription as a GeoPark. Recognition at this level invariably brings visitor pressure, and with it concern as to the impact they exert on site integrity. Rarely, however, is the same overt concern expressed for the risks that such sites pose to the visitors – or not at least until disaster strikes. Yet, the very features that make these sites attractive – tall, exposed, largely unconstrained columns – render many of them intrinsically unstable, prone to catastrophic collapse and potentially hazardous to visitors. In this presentation we highlight the nature of these slope instability issues and we create a baseline for Tongpan. The results show that the method of baselining is effective and identifies some of the key controls.

並列關鍵字

Baseline ； Columnar Basalt ； Block Release ； Toppling ； Database

參考文獻

Ho, K.S. (1999) Sr-Nd isotope and geochemical evidence for the origin of clinopyroxene, amphibole and mica megacrysts in alkall basaltic rocks from south-eastern China and Penghu Islands. Bull. Natl. Mus. Nat. Sci. 12:1-31.

Adhikary, D et al, (1997) A study of the mechanism of flexural toppling failure of rock slopes. Rock Mechanics and Rock Engineering, 30, 75-93.

Amini, M. et al, (2009) Stability Analysis and the Stabilisation of Flexural Toppling Failure. Rock Mechanics and Rock Engineering, 42, 751-782.

Budkewitsch, P. and Robin, P. Y. (1994) Modelling the Evolution of Columnar Joints. Journal of Volcanology and Geothermal Research, 59, 219-239.

Bulkeley, R. Part of a letter from Sir RBSRS to Dr. Lister, concerning the Giants Causway in the County of Atrim in Ireland. Phil. Trans. R. Soc. Lond, 17, 708–710.