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| 福建深沪湾地区晚更新世中晚期以来的地壳运动 | |
| 引用本文： | 徐起浩,冯炎基,施建生.福建深沪湾地区晚更新世中晚期以来的地壳运动[J].地震地质,2002,24(1):111-123. |
| 作者姓名： | 徐起浩 冯炎基 施建生 |
| 作者单位： | 1. 广东省地震局,广州,510070 2. 广州地理研究所,广州,510070 3. 福建省晋江市科学技术委员会,晋江,362200 |
| 基金项目： | 地震科学联合基金 (1970 96 )资助 |
| 摘 要： | 研究表明 ,深沪湾地区晚更新世早中期地壳运动以下沉为主 ,沉积了冲洪积含砾砂粘土层。晚更新世中晚期以来地壳先升后降 ,近 15 0 0aB .P .以来地壳较为稳定。在 (2 5 5 80± 2 4 90 )～15 4 6 0aB .P .期间 ,该区地壳与水动型海平面大致同步升高 ,上升幅度为 8m左右 ,速率达 0 .78mm/a ,深沪湾内生长了古牡蛎。 15 4 6 0～ 110 0 0aB .P .期间 ,该区地壳快速上升 ,上升幅度超过 10m ,速率超过 2mm/a ,形成多个由晚更新世含砾砂粘土构成的低凹洼地 ,古牡蛎滩成为台地。其后地壳稳定 ,在低凹洼地内生长了古森林。 70 0 0aB .P .深沪湾发生了由强古地震导致的地壳快速下沉 ,古森林生长的凹陷洼地变成泻湖环境 ,古牡蛎滩台地与海面很接近。 2 0 0 0aB .P .左右 ,深沪湾又一次发生由强古地震导致的地壳快速下沉 ,古森林下沉到更深的海底 ,古牡蛎滩回到潮间带海域 |
| 关 键 词： | 地壳运动 晚更新世 古地震 福建 |
| 文章编号： | 0253-4967(2002)01-111-13 |
| 修稿时间： | 2000年6月7日 |
CRUSTAL MOVEMENT IN SHENHUWAN BAY AREA, FUJIAN PROVINCE SINCE THE MIDDLE STAGE OF LATE PLEISTOCENE |
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| XU Qi-hao FENG Yan-ji SHI Jian-sheng Seismological Bureau of Guangdong Province,Guangzhou ,China Guangzhou Institute of Geography,Guangzhou ,China Committee of Science and Technology of Jin.CRUSTAL MOVEMENT IN SHENHUWAN BAY AREA, FUJIAN PROVINCE SINCE THE MIDDLE STAGE OF LATE PLEISTOCENE[J].Seismology and Geology,2002,24(1):111-123. | |
| Authors: | XU Qi-hao FENG Yan-ji SHI Jian-sheng Seismological Bureau of Guangdong Province Guangzhou China Guangzhou Institute of Geography Guangzhou China Committee of Science and Technology of Jin |
| Affiliation: | XU Qi-hao 1) FENG Yan-ji 2) SHI Jian-sheng 3) 1) Seismological Bureau of Guangdong Province,Guangzhou 510070,China 2) Guangzhou Institute of Geography,Guangzhou 510070,China 3) Committee of Science and Technology of Jin |
| Abstract: | Crustal movement in Shenhuwan Bay area during the early and middle stages of late Pleistocene was dominated by subsidence, resulting in the deposition of alluvial and fluvial gravel-bearing sandy clays. Since the middle stage of late Pleistocene, crustal movement here has been characterized by uplift followed by subsidence. In the past 1 500 years, the crust was relatively stable. During the time period of 25.58± 2.49ka～15.46ka B.P., the crustal movement in Shenhuwan Bay was characterized by uplift simulta |
| Keywords: | Crustal movement Late Pleistocene Paleoearthquake Fujian |
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