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頁籤選單縮合
題名 | Possible Links between the Development of Plio-Pleistocene Coral Reef Limestones and Thrust Migration in Southwestern Taiwan=臺灣西南部上新-更新世的珊瑚礁石灰岩發育與逆斷層前移的可能關連性 |
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作者 | 宮守業; 李通藝; 吳榮章; 王士偉; 楊耿明; | 書刊名 | 中國地質學會會刊 |
卷期 | 39:2 1996.04[民85.04] |
頁次 | 頁151-166 |
分類號 | 356.232 |
關鍵詞 | 珊瑚礁發育; 逆斷層前緣前移; 前陸盆地; 臺灣西南部; Coral reef development; Thrust-front migration; Foreland basin; Southwestern Taiwan; |
語文 | 英文(English) |
英文摘要 | The southwestern Taiwan is part of a Plio-Pleistocene foreland basin filled with thick siliciclastic sediments. Embedded in these sequences are several lenticular reef limestones which are characterized by: (1) a rapid transition from underlying deep-water siliciclastic mudstones upward to reef limestones, (2) a lateral interfingering with deep-water siliciclastics, (3) an overlay of terrestrial deposits or of no other strata, implying an emergence above sea level since the reef formation, and (4) a location closely associated with anticlines. The authors propose that the majority of the Pleistocene reef limestones in southwestern Taiwan, including the Tudikungchi, Takangshan, Hsiaokangshan, Panpingshan and Kaohsiung Limestones, were deposited on local structural highs formed by thrust-induced anticlinal ridges that resulted from the cratonward migration of the orogen. They also speculate that the overall age-spatial distributions of these reef limestones could possibly represent thrust-front migration of the foreland basin. 330 0$a臺灣西南部為一上新—更新世的前陸盆地,其中沈積了以泥岩為主的巨厚的矽質碎 屑岩。在此厚層的泥岩地層中,有幾個零散的上新—更新世的透鏡狀珊瑚礁石灰岩體分布。 這些礁灰岩的特徵是:(1)由下伏之深水相矽質碎屑泥岩迅速轉變成珊瑚礁石灰岩,(2)水平 方向漸變為深水相的矽質碎屑沈積物,(3)更新世的礁灰岩大體上沒有其他岩層建蓋或僅有 陸相地層覆蓋,(4)這些礁灰岩的分布和逆斷層、背斜密切相關。 作者建議這些更新世的礁灰岩可能發育在由逆斷層、背斜所形成的局部古構造高區上。逆 斷層、背斜則是由造山帶向歐亞大陸移動而造成。這些珊瑚礁石灰岩的年代一空間分布可 能代表了前陸盆地變形前緣的前移。 |
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