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相關文獻
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頁籤選單縮合
題名 | Recent Geologic Structures in the Chipenchushan Area, Southern Taiwan=南臺灣知本主山地區近來之地質構造 |
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作者 | 陳其瑞; | 書刊名 | 中國地質學會會刊 |
卷期 | 41:3 1998.08[民87.08] |
頁次 | 頁471-488 |
分類號 | 358.6 |
關鍵詞 | 知本主山; 逆衝斷層; 反逆衝斷層; 疊置作用; 造山作用; Chipenchushan; Thrust; Backthrust; Piling up; Orogeny; |
語文 | 英文(English) |
中文摘要 | 知本主山位於臺灣中央山脈變質帶的南端,而此變質帶自上新世以來由於呂宋火 山弧與亞洲大陸邊緣的壓撞而曾經抬升及蝕耗。這個特別地點被認為對觀察近來由於壓撞引 起的造構有特殊的重要性,乃是因為中央山脈的大背斜系是向南傾沒而此地點的變質基岩正 值揭蓋階段而未曾受到大擾動。基於知本主山地區構造的形式及規模考量,吾人可以將此地 區近來的構造活動分為連續的三期,即第一期:由近東西擠壓造成向西運動的逆衝斷層及伴 生的褶皺;第二期:近於向東運動的反逆衝斷層及伴生褶皺。第三期:主要為近於南北向擠 壓作用而產生的褶皺。這些構造活動的現象明顯代表一個地區承受擠壓作用的產物,乃是由 於菲律賓海板塊向西北運動造成弧向陸斜撞的結果。前述的構造活動相信是發生在淺處且年 代年輕,反映了各種應力與地質材質隨時間變化交互反應的結果。此地區造山的過程,總體 而言認為主要是逆街及反逆街斷層疊置的結果,而褶皺作用只是扮演一個伴隨的小角色。此 地區造山模式大致可與 Knipe(1990) 描述的蘇格蘭 Moine 逆衝斷層帶相比擬。 |
英文摘要 | Chipenchushan is located in the southern part of the Central Range metamorphic belt of Taiwan, which has been uplifted and exhumed since Pliocene due to collision between the Asian continental margin and the Luzon volcanic arc. This particular site is considered important and crucial for observing recent structures due to the collision because the complicated huge anticlinorium of the Central Range has the general plunge to the south and thus the metamorphic basement has been just unroofed relatively intact. Basically, according to the scale and style of the structures, recent structural activities in this area can be geneally divided into three consecutive stages, namely (1) 1st stage: west-verging thrusting and concomitant folding as a consequence of a push from E to W, (2) 2nd stage: east-verging backthrusting and concomitant folding and (3) 3rd stage: mainly folding due to a near N-S compression. These activities and structural phenomena clearly represe-nt the products of an area undergoing general compression, resulted from the oblique arc-continent collision driven by the northwest push of the Philippine Sea plate. The aforementioned structural activities are believed to have taken place at a rather shallow level and at a relatively young age, reflecting quite faithfully different interactions of various stress with geologic material through time. The mountain-building process of this area in total, can be regarded as mainly represented by piling up of the thrust and backthrust sheets, with folding playing a relatively minor and concomitant role. The orogenic model of this area may be comparable to that of the Moine Thrust zone of Scotland described by Knipe (1990). |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。