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題 名 | Magnetic Fabric in the Non-Metamorphosed Terrain of the Northwestern Foothill-Hsuehshan Belts of Taiwan=臺灣西北部麓山﹣雪山帶未變質區的磁性組構 |
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作 者 | 呂懿德; | 書刊名 | 中國地質學會會刊 |
卷 期 | 34:2 1991.04[民80.04] |
頁 次 | 頁131-146 |
分類號 | 353.5 |
關鍵詞 | 未變質區; 西北部; 雪山帶; 磁性組構; 臺灣; 麓山; |
語 文 | 英文(English) |
中文摘要 | 本文分析臺灣西北部麓山--雪山帶新生代未變質區岩樣的磁感率非均向性。大部分早於更新世的採樣點除仍保存有原始沉積時的磁性組構外,也發現很顯著的磁性線理,然而,更新世採樣點結果則只顯示具有葉片狀的磁性組構。我們認為線性組構係歐亞大陸板塊與菲律賓海板塊碰撞產生壓縮性應力所造成的結果,而葉片狀組構則儘反應單純的沉積過程,這些結果顯示本地區的古應力型態在上新世晚期屋更新世早期已產生改變。 |
英文摘要 | An analysis of the anisotropy of magnetic susceptibility (AMS) was carried out in the non-metamorphosed Cenozoic terrain of the northwestern Foothill-Hsuehshan Range of Taiwan. A well-marked magnetic lineation has been found at most of the sites of pre-Pleistocene age, where the original sedimentary fabric is still largely preserved. However, the results from the sites of Pleistocene age show only a foliated magnetic fabric. We interpret the lineated magnetic fabric as a result of compressive stress associated with the collision between the Eurasian and Philippine Sea plates. The foliated magnetic fabric is likely to reflect only simple depositional processes. This implies that the paleostress pattern in this region has changed during late Pliocene or early Pleistocene. |
本系統中英文摘要資訊取自各篇刊載內容。