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題 名 | Holocene Eruptions and Lithofacies of Volcanic Rocks in the Tienchi Volcano of Changbeishan, Ne China=中國東北長白山天池火山全新世以來的噴發及其火山岩相 |
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作 者 | 宋聖榮; 劉若新; 魏海泉; | 書刊名 | 中國地質學會會刊 |
卷 期 | 41:3 1998.08[民87.08] |
頁 次 | 頁359-380 |
分類號 | 358.3 |
關鍵詞 | 長白山; 天池; 中酸凝灰岩; 灰落堆積物; 火山泥流; 火山岩相; Changbeishan; Tienchi; Ignimbrite; Fall deposits; Lahar; Volcanic lithofacies; |
語 文 | 英文(English) |
中文摘要 | 長白山天池火山位於中國大陸東北吉林省與北朝鮮邊界,是大陸境內三個有歷史 噴發記錄的火山之一,也是噴發最劇烈和破壞性最大的火山。 由野外產狀、碳 14 定年法 和歷史記錄得知, 全新世以來, 天池火山最少有五次的噴發, 其噴發年代分別為距今約 4125 和 I000 年左右, 和西元 1597、1668 和 1702 年,前兩次是由碳 14 定年法得知, 後三次則由歷史記錄而來。 其中, 距今約 1000 年左右的噴發,噴出的灰落浮岩分佈達至 1000 公里以外的日本北海道,和噴出中、酸性火山碎屑岩的量約為 172km �纂A可能是地球 上兩千年以來最大的火山噴發之一。天池火山產物,依野外特徵可區分為六種岩相,分別為 灰落浮岩、浮岩碎屑流、火山岩屑崩落物、滯後角礫岩、熔岩流和再堆積火山碎屑岩。然後 依其在空問上的分佈,可把這些岩相在組合成四個岩相組合,為火山陷落相、近火山相、中 間火山相和末端火山相,以探討陸上酸性火山噴發的岩相分佈模式。 |
英文摘要 | The Tienchi Volcano is one of the two composite cones in the Changbeishan Volcano Group. There have been at least five eruptions, recognized according to field occurrences, C-14 age datings and literature records since Holocene. They occurred in ca. 4125- and ca. 1000-years BP and 1597, 1668 and 1702 AD. The eruption of ca. 1000-years BP was probably one of the largest eruptions in the last two thousand years in the world. The Holocene volcanlc deposits have various occurrences and can be divided into six lithofacies in terms of their field characteristics. They are pumice falls, pumice pyroclastic flows or ignimbrites, co-ignimbrite lag-breccias, lava flows, debris avalanches, and secondary deposits. Pumice falls covered widely, but mainly distributed toward the east, even as far as. North Japan over 1000 km far away from the caldera, indicating the prevalent wind was eastward during the eruption. Two slope changes divide the thickness-versus-distance plot of pumice falls into three segments, which suggest pumices in each segment might be deposited from an eruptive column, umbrella clouds and diluted clouds, respectively. Six lithofacies can be further grouped into four facies associations, the caldera, proximal or near-vent volcanic, medial volcanic and distal volcanic facies, based on the position,away from the eruptive center. A facies model of subaerial silicic volcanfSm thus is proposed. |
本系統中英文摘要資訊取自各篇刊載內容。