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題 名 | 從LiDAR的2公尺×2公尺數值模擬地形分析大屯火山群的火山地形=Scanning Laser Mapping (2M×2M DTM) of the Pleistocene Tatun Volcanic Landform |
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作 者 | 陳文山; 楊志成; 楊小青; 劉進金; 詹瑜璋; 謝凱旋; 謝有忠; | 書刊名 | 經濟部中央地質調查所彙刊 |
卷 期 | 20 2007.07[民96.07] |
頁 次 | 頁101-128 |
分類號 | 354.1 |
關鍵詞 | 空載雷射掃描; 大屯火山; 舌狀熔岩流; 熔岩流; LiDAR; Tatun volcano; Lava lobe; Lava flow; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究利用空載雷射掃描(LiDAR)製成2公尺×2公尺的數值模擬地形圖(DTM)來判讀大屯火山群的火山地形,辨識的火山地形特徵有熔岩穹丘、火山口、大型舌狀熔岩流、小型圓弧狀熔岩流、指狀熔岩流、平行脊構造與火山碎屑流。從地形特徵與岩石特性,顯示約一百萬年以來大屯火山群的噴發物主要屬於安山岩質熔岩流,共計形成51個火山錐體。期間,大屯火山群共有七次主要的噴發期,各期熔岩流岩性依次為角閃石安山岩、角閃石-兩輝安山岩、兩輝-角閃石安山岩、兩輝安山岩、紫蘇輝石-角閃石安山岩、橄欖石-角閃石-輝石安山岩,以及玄武岩。其中最主要的噴發期是第二期至第四期,又以第三期形成的火山最多,共計有21座火山。 |
英文摘要 | We utilize a scanning laser map (2m×2m DTM) to recognize the Tatun volcanic topography and distinguish crater, lava dome, lava lobe, pyroclastic flow and small-scale lava flow (ridge, finger and arc-shaped lavas). Volcano topographical characteristic and lithologic characteristics show that high-viscosity andesitic lava formed fifty-one lava domes. During the Pleistocene, the Tatun volcanism had seven main eruption stages producing hornblende andesite, hornblende-two pyroxene andesite, two pyroxene-hornblende andesite, two pyroxene andesite, hypersthene-hornblende andesite, olivine-hornblende-augite andesite, and basalt, respectively. Main volcanism occurred at the second to fourth stages, in which the third stage formed twenty-one lava domes. |
本系統中英文摘要資訊取自各篇刊載內容。