| 下扬子地区符离集-奉贤地震测深资料解释 |
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| 引用本文： | 张四维,张锁喜,唐荣余,梁中华,宋文荣,唐建民,刘建达,宋建军.下扬子地区符离集-奉贤地震测深资料解释[J].地球物理学报,1988,31(6):637-648. |
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| 作者姓名： | 张四维 张锁喜 唐荣余 梁中华 宋文荣 唐建民 刘建达 宋建军 |
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| 作者单位： | 江苏省地震局 南京 |
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| 摘 要： | 符离集-奉贤地震测深剖面总长570km,采用密集的多重观测系统。本文进行了沉积层静校正,使解释结果更为合理、准确。根据所得的界面和地层变化,以及断层位置的确定,对该区的地壳特征可得到如下几点认识: 1.下扬子地台区的地壳明显可分为上、中、下三层结构,它的各层与华北地台均有差别。 2.下扬子地区中地壳内存在一层强反射面,推测为高密度层或高速薄层所致。 3.郯庐断裂带处的莫氏面无明显落差,而是处在莫氏面隆起的斜坡部位,其间可能有一些张性破裂。 4.苏南的上古生代紧密褶皱、火山与岩浆活动以及二个地震活动带的存在,均与莫氏面的起伏有关。
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| 关 键 词： | 深地震测深 下扬子 郯庐断裂 |
| 收稿时间： | 1987-07-20 |
INTERPRETATION OF THE FULIJI-FENGXIAN DSS PROFILE IN XIAYANGZI REGION |
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| ZHANG SI-WEI ZHANG SOU-XI TANG RONG-YU LIANG ZHONG-HUA SONG WEN-RONG TANG JIAN-MING LIU JIAN-DA SONG JIAN-JUN.INTERPRETATION OF THE FULIJI-FENGXIAN DSS PROFILE IN XIAYANGZI REGION[J].Chinese Journal of Geophysics,1988,31(6):637-648. |
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| Authors: | ZHANG SI-WEI ZHANG SOU-XI TANG RONG-YU LIANG ZHONG-HUA SONG WEN-RONG TANG JIAN-MING LIU JIAN-DA SONG JIAN-JUN |
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| Institution: | Seismological Bureau of Jiangsu, Nanjing |
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| Abstract: | The total length of the Deep Seismic Sound (DSS) profile of Fuliji-Fengxian is about 570 km. The static correction of the sedimentary layer had been made. It makes the results more reasonable and accurate. We separate the Pg wave from the head waves of basement and crystalline basement interface, and then, find their boundaries. These coincide with the geological data. The middle and lower crust are calculated in detail by the SEIS-83 program, and get the following results:1. The crust of Xiayangzi platform can be clearly divided into three layers (upper, middle, lower). The differences in each layers between this region and North China platform have been discussed.2. An interface in the middle crust in Xiayangzi region has been found. It may be produced from a high density layer or high velocity thin layer.3. No clear throw at the Moho discontinuity in the area of Tan-Lu fault has been found. It lies in the section of the upheaval batter of it. Perhaps there are some tension fractures in it.4. The complex folds in the upper palaeozoic, the volcano and the seismic zones may be related to the undulation of Moho discontinuity. |
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| Keywords: | DSS profile Xiayang region Tan-Lu fault |
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