基于遥感影像研究宁波地区断裂活动性

Abstract

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

CLC Number:

P315.2

CHEN Guo-hu, SHAN Xin-jian, LI Jian-hua. A study on fault activity of Ningbo region based on satellite images[J]. EARTHQUAKE, 2007, 27(2): 131-138.

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

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