|
|||||
|
|
| Preliminary Study on Cenozoic Group and Fault Activity in the Sea Area Near the Yangtze River Mouth | |
| 引用本文： | Huo Enjie. Preliminary Study on Cenozoic Group and Fault Activity in the Sea Area Near the Yangtze River Mouth[J]. 中国地震研究, 2004, 18(1): 13-26 |
| 作者姓名： | Huo Enjie |
| 作者单位： | EarthquakeAdministrationofShanghaiMunicipalityShanghai200062,China |
| 基金项目： | ThisprojectwassupportedbyShanghaiScienceandTechnologyCommission (0 1 2 5 1 2 0 0 3)，China . |
| 摘 要： | By shallow seismic prospecting, the Cenozoic Group in the sea area near the Yangtze Rver Mouth can be divided into five seismic sequences. They correspond to the Quaternary,Pliocene, Upper Miocene, Lower Miocene and Eocene respectively. The Quaternary System covers all the detecting area. The Tertiary System overlaps and thins out from NE to SW. The sedimentary basement mainly consists of volcanic rock (J3) and acidic rock (r35). Paleogene or Late Cretaceous basins are not found there. The faults that have been detected are all normal faults. They can be divided into three groups (NE, NW, near EW) by their trend. The NE and NW-trending faults are predominant, and agree with aeromagnetic anomaly. Their length and displacement are larger than that of the EW-trending faults. The activity of the NEtrending faults is different in different segments. The SW segment is a Quaternary fault, the middle segment is a Neogene fault, The NE is Paleogene. But the segment of the NW-trending fault is not obvious. The average vertical displacement rate is about 0.015mm/a. |
| 关 键 词： | 新生代 地震活动性 地震勘探 扬子江 压条法 |
Preliminary Study on Cenozoic Group and Fault Activity in the Sea Area Near the Yangtze River Mouth |
|
| Huo Enjie. Preliminary Study on Cenozoic Group and Fault Activity in the Sea Area Near the Yangtze River Mouth[J]. Earthquake Research in China, 2004, 18(1): 13-26 | |
| Authors: | Huo Enjie |
| Affiliation: | Huo Enjie,Zhang Zhenquan,Liu Changsen and Wang FengEarthquake Administration of Shanghai Municipality,Shanghai 200062,China |
| Abstract: | By shallow seismic prospecting, the Cenozoic Group in the sea area near the Yangtze River Mouth can be divided into five seismic sequences. They correspond to the Quaternary, Pliocene, Upper Miocene, Lower Miocene and Eocene respectively. The Quaternary System covers all the detecting area. The Tertiary System overlaps and thins out from NE to SW. The sedimentary basement mainly consists of volcanic rock (J 3) and acidic rock (r 3 5). Paleogene or Late Cretaceous basins are not found there. The faults that have been detected are all normal faults. They can be divided into three groups (NE, NW, near EW) by their trend. The NE and NW trending faults are predominant, and agree with aeromagnetic anomaly. Their length and displacement are larger than that of the EW trending faults. The activity of the NE trending faults is different in different segments. The SW segment is a Quaternary fault, the middle segment is a Neogene fault, The NE is Paleogene. But the segment of the NW trending fault is not obvious. The average vertical displacement rate is about 0 015mm/a. |
| Keywords: | Sea area near the Yangtze River mouth Cenozoic layering Fault structure |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《中国地震研究》浏览原始摘要信息 | |
| 点击此处可从《中国地震研究》下载全文 | |