关键词: 活动构造, ETM影像, 柯坪

Abstract: In the area around Kalpintag thrust system, earthquakes occurred frequently and intensively. The fundamental data and detailed investigation about active tectonics and the law of earthquake recurrence in this region are desiderated. So, 12 scenes of Landsat-7 ETM digital images are chosen and processed exclusively for the active tectonics. Then, two color composite images of 30m-resolution over the region are portrayed with bands 3-2-1 and bands 7-4-3 as R-G-B respectively, while two color composite images of 15m-resolution over the field workaround are fused with bands 3-2-1-8 and bands 7-4-3-8, respectively. With these resulting images, we designed some geological interpretation criteria for active tectonics of Kalpintag thrust system. According to these criteria, active tectonics of the area around Kalpintag thrust system are interpreted with scales of 500,000, while those of three sites on the field workaround are interpreted in detail with scales of 50000, by means of contrastive interpretation with two kinds of different images at one time. At last, the field investigation confirmed that the used techniques of processing and interpretation in this research were resultful.

Key words: active tectonics, ETM image, Kalpintag