查詢結果分析
來源資料
頁籤選單縮合
題名 | 苗栗地區打鹿砂層地層架構和油氣儲集=Stratigraphy Architecture and Hydrocarbon Accumulation of Talu Sandstone in Miaoli Area |
---|---|
作者 | 楊耿明; 丁信修; Yang, Kenn-ming; Ting, Hsin-hsiu; |
期刊 | 探採研究彙報 |
出版日期 | 19971100 |
卷期 | 20 1997.11[民86.11] |
頁次 | 頁157-175 |
分類號 | 457.2 |
語文 | chi |
關鍵詞 | 苗栗地區; 打鹿砂岩; 地層架構; 地層封閉; Miaoli area; Talu sandstone; Stratigraphy architecture; Stratigraphic trap; |
中文摘要 | 本研究的主要目的在於運用新的層序地層觀念。配合苗栗地區的地質構造形貌, 以探討打鹿砂岩的地層架構和可能地層封閉型態。苗栗地區的打鹿砂岩依準層序單位的特性 可劃分為九個準層序單位,每個單位為一由頁岩變成砂岩的岩相變化,代表沉積環境由深漸 淺再迅速變深的循環。 利用 Fischer 圖示法針對打鹿砂岩九個準層序單位所作的分析顯示 ,沉積打鹿砂岩時期的第三層級循環海水面變化為一快速上升至高水面後再下降,然後下降 速率減緩的過程。根據沉積打鹿砂岩時期的第三層級循環海水面變化曲線,打鹿砂岩係一前 進堆積體。因此東邊砂層層數較少的打鹿砂岩應對比到西邊白沙屯 - 三湖 - 鐵通地區打鹿 砂岩的 TT-1A 砂層。 根據沈積打鹿砂岩之海水面變化的分析, TT-1B 和 TT-1C 向東分佈 的範圍有限, 僅限於鐵砧山 - 三湖背斜構造的東翼, 無法形成地層封閉。 而 TT-1A' 和 TT-1A" 則分佈較廣, 其厚度從鐵砧山 - 三湖背斜構造東翼始明顯增厚, 而在東邊錦水 - 永和山背斜構造西翼轉變成頁岩相, 所以該層砂層可能在東邊錦水 - 永和山背斜構造的西 翼形成上傾的地層封閉,而值得進一步探勘。 |
英文摘要 | The main purpose of this study is to apply new concepts about sequence stratigraphy, combined with subsurface structure feature in the Miaoli area, to investigate the stratigraphy architecture of and possible stratigraphic trap for the Talu Sandstone. The Talu Sandstone in the Miaoli area can be divided into nine parasequence units, based on the definition and characters of parasequence unit. Each parasequence unit is characterized by facies change from shale upward to sandstone, indicating a sedimentary cycle of gradual shallowing upward and rapid deepening. We apply Fischer plot to analyze the parasequence units in the Talu Sandstone. The results indicate that third-order sea level fluctuation passed a rapid rising and a gradually decreased falling during the period when the Talu Sandstone was deposited. Accordingly, the Talu Sandstone might be a progradational sedimentary wedge, and, therefore, the Talu Sandstone in the eastern part of the area, where sandstone beds are fewer than that in the western part of the area, should be correlated to the upper part of the Talu Sandstone, i.e., the so-called TT-1A sandstone beds, in the Paishatun-Shanhu- Tiechienshan area. The constructed sea level fluctuation also indicates distribution of sandstone beds in different parasequence units. Eastward extension of the lower part of the Talu Sandstone, i.e., the so-called TT- 1B and TT-1C sandstone beds, is very restricted, not beyond the eastern limb of the Tiechienshan and Shanhu anticlines, and, therefore, it is not possible for these sandstone beds to form stratigraphic traps. The sandstone beds in the middle part of the Talu Sandstone, i.e., the so-called TT-1A" and TT-1A' sandstone beds, are more widely distributed and their thickness remarkably increases from the eastern limb of the Tiechienshan and Shanhu anticlines to the east. These sandstone beds change into shale facies in the Chinshui-Yunghoshan areas and mihght form stratigraphic traps in the western limb of the Chinshui-Yunghoshan anticlines. Such stratigraphic traps are worthy to explore in the future. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。