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地震 ›› 2007, Vol. 27 ›› Issue (2): 131-138.

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基于遥感影像研究宁波地区断裂活动性

陈国浒, 单新建, 李建华   

  1. 中国地震局地质研究所地震动力学国家重点实验室, 北京 100029
  • 收稿日期:2006-12-12 修回日期:2007-01-09 出版日期:2007-04-30 发布日期:2021-10-29
  • 作者简介:陈国浒(1981-), 男, 浙江绍兴人, 2004年在读硕士研究生, 现主要从事遥感技术在地学的应用研究。
  • 基金资助:
    地震科学联合基金(106045)与大城市活断层探测与地震危险性评估项目资助

A study on fault activity of Ningbo region based on satellite images

CHEN Guo-hu, SHAN Xin-jian, LI Jian-hua   

  1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China
  • Received:2006-12-12 Revised:2007-01-09 Online:2007-04-30 Published:2021-10-29

摘要: 利用遥感影像多分辨率、 多光谱以及多传感器相结合的方法, 对浙江宁波地区约1900 km2范围的断裂活动性进行分析判读。 根据断裂的影像特征, 将所判读的断裂分为晚更新世活动, 早、 中更新世活动及第四纪活动不明显3类, 同时对主要断裂的活动性进行了详细分析。 宁波地区主要发育NNE向、 NE向和NW向三组活动构造。 其中NNE向育王山山前断裂, 在TM、 MSS和SPOT影像上都表现出清晰的断层形迹, 切过三处冲积洪积扇, 晚更新世有活动。 走向20°的老鹰山与走向55°的清凉山截然相接显示的线性影像反映出NE向算山-曹隘断裂的形迹, 断裂向宁波盆地延伸, 为宁波盆地规模最大的隐伏断裂。 多时相MSS影像上, 显示出NW向新乐—宝幢和宁波—莫枝活动断层的形迹, 它是深部构造活动在地表的反映, 与走向45°的算山—曹隘断裂, 可能是一组地壳破裂网络。

关键词: 遥感影像, 多分辨率, 多光谱, 活动断裂

Abstract: Fault activity in an area of about 1900 km2 in Ningbo region was investigated based on multiresolution, multisensor and multispectral satellite images. According to their imagery feature, the identified faults are divided into three groups with their activity, i.e. late Pleistocene, early-middle Pleistocene and before Quaternary. The active structure mainly consists of NNE-trending, NE-trending and NW-trending faults in Ningbo region, among which the NNE-trending Yuwangshan fault represents distinct fault characteristics on the TM, MSS and SPOT images, associated with the ruptured diluvial-pluvial fans in three regions, indicating that it was active in late Pleistocene. Remarkable evidence of Suanshan-Cao′ai fault was detected in the region where Laoying Mountain and Qingliang Mountain intersect with their striking of 20° and 55° respectively. It extends towards Ningbo basin, thus is probably the largest hidden fault in the studied region. The NW-trending Xinle-Baotong and Ningbo-Mozhi faults are almost perpendicular to the NE-trending Suanshan-Cao′ai fault, which may form a so-called crustal rupture grid.

Key words: Satellite image, Multiresolution, Multispectral, Active fault

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